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YU Yulong, GENG Yupeng, CHEN Gao
2024,32(3):301-309, DOI: 10.11926/jtsb.4788
Abstract:
Timely assessment of species threatened status is an important basis for adjusting the endangered level of species and implementing effective protection measures. The endemic plants in the Jinsha River area, including Aristolochia delavayi, Hibiscus aridicola, Stemona mairei and Amorphophallus albus, were investigated and evaluated. According to the “IUCN Red List Categories and Criteria: Version 3.1” and “Guidelines for Using the IUCN Red List Categories and Criteria: Version 15.1”, the threatened category of the four species were re-analyzed and evaluated based on the data obtained through field surveys. The results showed that A. delavayi was assessed as Vulnerable (VU), H. aridicola and A. albus were listed as Endangered (EN), and S. mairei was listed as Near Threatened (NT) under the existing wild population resources. Compared with the current threatened category of the four species, the threatened status of A. delavayi was downgraded from Endangered to Vulnerable, H. aridicola was upgraded from Vulnerable to Endangered, A. albus was upgraded from Near Threatened to Endangered, and S. mairei remained unchanged. This study provides a scientific reference for understanding the current status of wild resources, updating threatened category, and timely adjusting effective protection strategies of the four endemic plants.
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XIONG Ling, LONG Cuiling, LIANG Sheng, WU Taohong, LIU Qi, LIAO Quanlan, XUE Fei
2024,32(3):310-318, DOI: 10.11926/jtsb.4765
Abstract:
In order to understand the response of plant leaf functional traits to soil characteristics in karst forest, the woody plant communities in Maolan National Reserve were investigated by using the methods of sample plot and transversal, the weighted average leaf traits of woody plants in different terrain were calculated, and the relationship between leaf functional traits and soil characteristics analyzed by One-Way ANOVA and redundancy. The results showed that there were significant differences in plant leaf functional traits between different terrains at the growth type (evergreen/defoliate) and community level (P<0.05), among which the leaf area was the most sensitive, its response to habitat was obvious. However, leaf thickness of evergreen plants was greater than that of deciduous plants, while specific leaf area was the opposite, and the difference in chlorophyll content is not significant (P>0.05). There were significant difference in soil characteristics among different terrains (P<0.05). The field water capacity, capillary porosity, contents of total nitrogen, total phosphorus and organic matter of soil on funnel terrain were higher, and the soil fertility was the best, followed by valley and shady slope, while the soil on sunny slope was relatively barren. There was a correlation between leaf functional traits and soil characteristics in different terrain, but the interpretation rate of leaf functional traits variation was different in different terrain soil characteristics. The main soil characteristics affecting leaf functional traits were organic matter content, total nitrogen content, total phosphorus content, field water capacity and soil bulk density. Therefore, leaf functional traits and soil characteristics differ greatly in different terrain of Maolan karst forest. With the change of soil characteristics, leaf functional traits have different response characteristics, which is conducive to species coexistence and biodiversity maintenance in forest area.
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WANG Mengting, LIU Xiaomin, JIN Xinyue, WANG Lingru, XIANG Xiaoyan, TAO Ye
2024,32(3):319-329, DOI: 10.11926/jtsb.4767
Abstract:
Leaf morphological traits are the direct manifestation of plant environmental adaptability. Different canopy positions can form different microenvironments, which are direct places for plant leaves to interact with the external environment. In order to understand the influence of canopy position on leaf morphological traits, leaf morphological traits, including leaf length, leaf width, leaf thickness, petiole length, petiole diameter and leaf shape index, and allometry relationship among different crown positions of evergreen tree Cinnamomum camphora were analyzed. The results showed that there were significant differences in leaf morphological traits among different canopy orientations, but the change trends of the upper and lower layers of canopy was not completely consistent. In the upper layer of canopy, except leaf shape index and petiole length, the other 4 leaf morphological traits were the highest in the east side. In the lower layer of canopy, except leaf shape index, the other 5 leaf morphological traits were the smallest in the east side. In the same direction, there were some differences between the upper and lower layers of canopy, and the leaf shape index of lower layer was higher than that of upper layer, while the other morphological traits showed the opposite trend. In addition, the interaction of canopy layer and orientation had significant effects on leaf length, leaf thickness, petiole length, and petiole diameter. The leaf morphological traits in each canopy layer and canopy orientation mostly showed allometric relationship because allometric index was not equal to 1, and there were no significant differences in most of them. The leaf width vs. leaf thickness, leaf width vs. petiole length, leaf length vs. leaf thickness, and leaf length vs. petiole length showed allometric relationships for all canopy layers and directions. Therefore, canopy position had great influences on leaf morphological traits of C. camphora, but the allometric relationships between morphological traits were relatively stable, which was an important reflection of leaf phenotypic plasticity and the stability of internal relationships.
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MA Hongwei, WANG Hua, ZHANG Fangmin
2024,32(3):330-338, DOI: 10.11926/jtsb.4751
Abstract:
In order to understand the effects of climate change on vegetation phenology in tropical and subtropical monsoon regions of China, vegetation phenology parameters in three provinces (regions) of south China were extracted using Double Logistic method and threshold method based on MODIS EVI time series data from 2001 to 2020, and the spatio-temporal variation characteristics of vegetation phenology were analyzed. The results showed that the start of growing season was mainly concentrated in the 90th—105th day, the end of growing season in the 320th—335th day, and the length of growing season in the 220th—235th day. In the past 20 years, the start of growing season was delayed, the end of growing season was basically unchanged, and the length of growing season was shortened. In terms of spatial distribution, the start of growing season gradually delayed from west to east and from north to south in Guangdong and Guangxi, and gradually delayed from northeast to southwest in Hainan. The distribution of wilting period was late in the center and early in the periphery of Guangdong Province, while it was early in the center but late in the periphery of Hainan Province. The length of growing season gradually shortened from west to east in Guangdong and Guangxi, while it gradually extended from southwest to northeast in Hainan. With the increase of altitude, the start of growing season of different regions and different vegetation varied and fluctuated greatly, while the end of growing season was first delayed and then advanced, and the length of growing season was first extended and then shortened. Therefore, these revealed the change characteristics of vegetation phenology in the three provinces (regions) of south China under the background of climate warming, and had guiding significance for more comprehensive understanding of the response of southern vegetation to climate warming.
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XUE Qianhuai, CHEN Qin, TANG Xinran, WANG Xinyang, DU Yanjun
2024,32(3):339-348, DOI: 10.11926/jtsb.4759
Abstract:
The phenological patterns of plants tend to fluctuate, with variations occurring in the timing and amount of leaf-out, flowering, and fruiting from year to year or event to event. However, the phenological patterns in tropical regions are still largely unknown. The phenology of 126 plant species located in the campus of Hainan University in Haikou, Hainan Island were observed and recorded over three years, including leaf-out, flowering, and fruiting time. The main climate factors affecting plant phenology in tropical areas were analyzed by multiple regression analysis of phenology and environmental variables. The results showed that plant phenological patterns in the tropics were distinctly seasonal, leaf-out, flowering, and fruiting phenology occurred in April—June, April—August, and May—November, respectively. The climatic factors affecting the phenological pattern of leaf spreading and flowering were the average sunshine duration per month, and the number of fruit bearing species per month was correlated with air temperature, especially the number of fruit ripening species per month was significantly correlated with the monthly minimum air temperature. There were differences in the phenological periods among different functional groups. The leaf-out of shrubs was earlier than that of herbs and trees, leaf-out of wind-borne plants was earlier than that of insect-borne plants, and the leaf-out and fruit ripening time of fleshy-fruited plants were earlier than those of non-fleshy fruited plants. Bloom of trees was earlier than that of herbs and shrubs, which non-fleshy-fruited plants was earlier than fleshy-fruited plants, and fruit mature of wind-borne plants was earlier than that of insect-borne plants. These would be of great significance for predicting tropical phenological events in the future.
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Yang Man, Yuan Dongmei, Yan Linbin, Yu Lifei, An Mingtai, He Qinqin, Mu Jun
2024,32(3):349-356, DOI: 10.11926/jtsb.4830
Abstract:
The interspecific relationship is one of the important quantitative and structural characteristics of plant communities, which directly affects the stability of communities, and it is of great significance to study the interspecific relationship and community stability for the protection and stability of plant population. Alsophila spinulosa community in Chishui National Nature Reserve of Guizhou Province was investigated by means of sample method, and the overall correlation and interspecific correlation of plants were analyzed and the stability coefficient of the community was calculated. The results showed that Phyllostachys edulis was dominant species in the community, and the interspecific relationship between P. edulis and A. spinulosa showed a significant positive correlation. Alsophila spinulosa was greatly affected by interspecies at the early development stage, but was relatively independent state at the late development stage, showing weak or no correlation with other species, and was less affected by interspecies. The contribution law analysis showed that the stability coefficient of P. edulis-A. spinulosa community was 21/79, indicating that the community was stable in Jinshagou area.
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ZHAO Caiyun, LU Shuangfei, LI Rongliang, YIN Xiaojie, TENG Jiao, GAO Weijie, WANG Yan
2024,32(3):357-366, DOI: 10.11926/jtsb.4761
Abstract:
In order to understand the potential distribution of six subtropical evergreen Quercus species in south-west China under future climate scenarios, based on the distribution data, physiological and ecological characteristics of six Quercus trees in Southwest China, including Q. guyavaefolia, Q. aquifolioides, Q. rehderiana, Q. semecarpifolia, Q. senescens and Q. dolicholepis, environmental data and future the 2070s (2061—2080) climate scenario data (SSPs126, SSPs245, SSPs585), Maximum Entropy (MaxEnt) model and Geographic Information System (GIS) technology were used to analyze the impact of future climate change on the potential distribution of these tree species. The results showed that the AUC values of the MaxEnt model for all six Quercus species were more than 0.9, indicating high model simulation accuracy. The main environmental factors affecting the distribution of six Quercus speciesincludedtemperature seasonality, annual precipitation, altitude, minimum temperature of coldest month and slope. Consequently, these tree species were mostly suitable for distributing in warm and humid mountainous areas with minimal seasonality temperature changes. Compared to the other three tree species, Q. aquifolioide, Q. rehderiana and Q. semecarpifolia were more suitable for growing in middle and high mountain areas with lower temperatures and slightly greater seasonal temperature changes. The potential suitable areas for these six Quercus species were southwest China, as well as western of central China, western of south China and southern of northwest China. The high suitable areas were mainly located in southern Sichuan and northwestern Yunnan. Under the future climate scenarios, the suitable areas of main subtropical evergreen Quercus trees in southwest China would expand to the northwest as a whole.
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HUANG Gui, YU Linlan, LIU Xinyu, CHEN Ming, XUE Yuegui
2024,32(3):367-377, DOI: 10.11926/jtsb.4766
Abstract:
In order to explore the nutrient cycling characteristics of C, N and P in Tiankeng forest communities in Dashiwei, Leye, Guangxi, the contents and stoichiometric ratios of C, N and P in plant leaf, litter and soil of forest communities inside and outside Tiankeng were compared, and their internal relationship and interaction were studied by using correlation analysis and redundancy analysis. The results showed that the leaf and litter of the forest inside Tiankeng showed a pattern of low C, low N and high P, and the soil was low C, low N and high P compared with the forests outside the Tiankeng. The C:N and C:P in leaf were significantly positively correlated with the C and N:P in litter, and C in leaf showed significantly negative correlation with P in soil. The N and N:P in leaf outside Tiankeng were significantly negative correlated with N:P in soil, and C:N in leaf was significantly positive correlated with C and C:N in soil, indicating that the C and P in litter inside Tiankeng forest might came from leaves, while C and N in leaf outside Tiankeng forests were mainly from soil. The explanation rates of soil C:N:P for the change of C:N:P of leaves and litter were 90.7% and 50.6%, respectively. The P had the highest explanation for the change of C:N:P of leaves and litter. Plants inside Tiankeng were more sensitive to the change of P content, while plants outside Tiankeng were more sensitive to the change of N content, which indicating that the forest inside Tiankeng might be the P-limited site, while the forest outside Tiankeng might be the N-limited site. The differences and associations of C:N:P in leaf-litter-soil of the forests inside and outside karst Tiankeng reflected the characteristics of nutrient cycling and the adaptation of plant community.
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MA Wen, WU Rongrong, SUN Yuchen, CAI Jingrong, GUO Zhixiong, SHE Wenqin
2024,32(3):378-386, DOI: 10.11926/jtsb.4752
Abstract:
In order to investigate the effects of vibration on shedding and ethylene biosynthesis of potted Bougainvillea glabra, the shedding rate of bracts of pottedBougainvillea×buttiana ‘Miss Manila’ under vibration, closed environment and vibration+closed environment, and the related indexes of ethylene synthesis were measured for 4-24 h after treatment. The results showed that the shedding rate of bracts was significantly higher than that of the control within 7 days after vibration+closed environment and vibration treatments, and the ethylene release, 1-amino-cyclopropane-1-carboxylic acid (ACC) content, ACC synthase (ACS) and ACC oxidase (ACO) activities in bracts of bracteoles 0.5-1.4 cm long (S1) and 1.5-2.4 cm long (S2) were significantly higher than those of the control, which overall trends were first increased and then decreased. The relative expression of BsSAMS, BsACS, BsACO genes in S1 and S2 increased significantly, and which change trends were consistent with those of ACS and ACO activities. Therefore, shedding rate of bracts, ethylene content, key enzyme activities of ethylene biosynthesis, the expression of ethylene synthesis genes BsSAMS, BsACS, BsACO of potted ‘Miss Manila’ all increased significantly after vibration, and the closed environment could promote the effect of vibration.
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LIN Xiuling, SHI Fenghou, YU Zhonghua, LONG Ziwen, JIANG Xueli, SHEN Yongbao
2024,32(3):387-396, DOI: 10.11926/jtsb.4756
Abstract:
By understanding the causes of seed dormancy of Phoebe sheareri, mechanical, acid-alkali corrosion and lamination treatment (5 ℃-25 ℃) were used to study the best methods to relieve seed dormancy. The results showed that the low permeability of seed coat was the main reason for inhibiting seed germination, and the seed dormancy type was physical dormancy. Acid and alkali corrosion treatments could not effectively break seed dormancy. After the seeds were treated with concentrated sulfuric acid and sodium hydroxide for different time (1-25 min), the germination rate was increased by 33%-55%, but the seeds were seriously damaged, and the decay rate was as high as 30%-97%. Both mechanical treatment and stratification treatments could effectively break seed dormancy, and removing whole seed coat by mechanical treatment had the best effect, and seed germination rate and germination potential increased by 99.33% and 76.00%, respectively. But this method was time-consuming and laborious. The seeds under 25 ℃ warm stratification for 45 d, 25 ℃/15 ℃ and 5 ℃/25 ℃/5 ℃ variable temperature stratification for 60 d could effectively promote germination, with the germination rate and germination potential increased by 89%-93% and 79%-83%, respectively, and there were no obvious differences in germination rate and germination potential among these types of stratification. However, compared with warm stratification, variable temperature stratification requires longer stratification time and higher seed decay rate. Therefore, 25 ℃ warm stratification for 45 d was the optimal way for breaking seed dormancy of P. sheareri.
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SHI Jiawen, QIAN Yonghui, LUO Yan, LI Qingqing
2024,32(3):397-408, DOI: 10.11926/jtsb.4764
Abstract:
Effective conservation strategies require an in-depth understanding of reproductive characteristics of plants. The reproductive biology of Cymbidium aloifolium was investigated in Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences in 2022 and 2023, including flowering phenology, breeding system, flower morphology, pollination characteristics and flower volatile components. The results showed that C. aloifolium flowers began to bloom during mid-April. An individual flower and the population of C. aloifolium lasted 7 and 36 days, respectively. The pollen viability peaked at 47.15% on the first day of flowering, and then decreased. The stigma remained receptive throughout the single flowering period, reaching peak on the second day. The breeding system was facultative outcross breeding and dependent on pollinators, and the natural seed setting rate was 6.9%. The epidermal cells at the apex of the labellum and at the base of the labellum were conical and fingerlike protuberances, respectively. The fingerlike protuberances at the base had oil particles attached outside the cells, which might be the reward of pollinators. The yellow cap had cone-shaped cells that reflect light and may attract insects. Apis cerana was the only effective pollinator ofC. aloifolium. The content of (E)-2-decenyl acetate was the higest in the floral volatile odor of C. aloifolium. Therefore, it was suggested that the floral structure of C. aloifolium had significant adaptability to pollinators.
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WAN Chunyan, YU Junrui, ZHU Shidan
2024,32(3):409-416, DOI: 10.11926/jtsb.4762
Abstract:
The roots of plants have the function of water absorption and transport, and some of them also have important medical value. The anatomical characteristics of coarse roots of 40 medicinal herbs were observed, the differences among functional groups were compared, the correlations of traits were analyzed, and the interspecific variability of root traits was explained in combination with phylogenetic and natural climate factors. The results showed that the root anatomical characteristics of herbaceous plants were significantly different among species. Compared with dicotyledonous plants, the proportion of root cortex in monocotyledonous plants was higher, while the proportion of median column was smaller, which revealed the differences in root absorption and transport strategies between the two plants. Traits network analysis showed that xylem area ratio (XAR) was the central trait with the highest degree and tightness. XAR was positively correlated with phloem area ratio but negatively correlated with cortex fraction (CF). Except for vessel frequency and CF, other traits showed no significant phylogenetic signals, indicating that root characters were less affected by phylogeny. In monocotyledon herbaceous species, mean annual precipitation was positively correlated with CF, while in dicotyledon herbaceous species, mean annual temperature was positively correlated with average vessel diameter. These would further reveal the diversity and adaptability of the root structure of medicinal herbs.
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CHEN Hanxin, LIN Yihui, MA Xinyi, LIN Xiufang
2024,32(3):417-426, DOI: 10.11926/jtsb.4814
Abstract:
In order to elucidate the mutation mechanism of leaf color mutation ofAristaloe aristata, the phenotypic characteristics, leaf ultrastructure, photosynthetic pigment content, chlorophyll fluorescence parameters and metabolomics between leaf color mutant ‘MT-1’ and normal leaf color germplasm ‘WT-18’ were compared. The results showed that compared with ‘WT-18’, the mutant ‘MT-1’ exhibited yellow strips from young leaves, and the plant type became smaller and the growth was slower. The number of stomata became less and small, and the shape changed from rectangle to square. The number of chloroplasts and internal lamella decreased, and the volume decreased obviously. The contents of photosynthetic pigments, including chlorophyll a, chlorophyll b and carotenoids, and chlorophyll fluorescence dynamic parameters (Fo, Fm, Fv/Fm, ФPSⅡ, qP, qN and ETR) decreased significantly. The metabolites of ‘MT-1’ and ‘WT-18’ were significantly different. The KEGG metabolic pathway analysis showed that most of the different metabolites were enriched in amino acid metabolism, glucose metabolism, lipid metabolism, nucleic acid metabolism, secondary metabolite biosynthesis, and other pathways. Therefore, the changes in chloroplast related genes might be an important cause of leaf chlorosis mutation.
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LIU Xi, NIU Zhengwen, XU Jiaxin, LEI Zupei, PAN Xiangdong, PENG Chunju, KANG Huajing, YE Zipiao
2024,32(3):427-434, DOI: 10.11926/jtsb.4733
Abstract:
Euchresta japonica is a Class II key protected wild plant in China. The response of photosynthetic characteristics to light intensity and drought was studied by setting different layers of shade nets and watering with different concentrations of polyethylene glycol solution. The results showed that the saturated light intensity of E. japonica leaves was 683.06~907.07
m mol/(m2·s). The maximum electron transfer rates (ETRmax) and the maximum net photosynthetic rate (Pnmax) under single layer shading were higher than those under double layer shading. The ETRmax and Pnmax under single layer shading without drought were the highest of 55.36 and 6.73m mol/(m2·s), respectively. Under the same shading condition, the Pnmax and the corresponding saturated light intensity of E. japonica decreased with the increase of drought degree. The transpiration rate and water use efficiency under single layer shading were higher than those under double layer shading. The actual photochemical efficiency, photochemical quenching coefficient and non-photochemical quenching coefficient of photosystem II of E. japonica leaves showed no significant difference among different treatments (P>0.05). Euchresta japonica is a semi-sunny plant, whose leaves whose leaves can take advantage of weak light and its plants have strong drought tolerance. Therefore, it is suggested that proper shading and adequate soil water content should be maintained during field return, ex situ conservation and artificial cultivation. -
LI Jianjun, GUO Xin, LIN Chenyu, WANG Wenjuan, GAO Miaomiao, CHEN Yinhua, YU Xiaohui
2024,32(3):435-445, DOI: 10.11926/jtsb.4763
Abstract:
Plant ferritin (FER) can store iron and respond to various abiotic stresses. The FER gene family of cassava (Manihot esculenta) was analyzed based on a genome-wide level. The results showed that four FER genes had been identified from cassava, named MeFERs, encoded MeFERs could be divided into two clades based on phylogenetic tree analysis. All members contained Euk_Ferritin functional domain, and located in the chloroplast. The MeFERs genes located in chromosome LG7-LG10, respectively. Gene collinearity analysis showed that there were three potential duplicate gene pairs without tandem duplication events. The Ka/Ks value indicated that the homologous gene of MeFER was purified and selected. The family contained cis-acting elements in response to hormones and stress induction. Moreover, qRT-PCR analysis showed that the expression of MeFERs gene was tissue-specific, and MeFER4 gene responded to various stresses, with the most significant response under drought stress. Therefore, these would provide a foundation for future functional studies of the cassava FER gene family.
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DU Guoxin, CAI Caihong, XIA Yihua, HUANG Shengzhuo, MEI Wenli, DAI Haofu, CHEN Huiqin
2024,32(3):446-450, DOI: 10.11926/jtsb.4760
Abstract:
In order to study the chemical constituents in butanol fraction of ethanol extract of Dendrobium nobile, column chromatographic techniques including silica gel, Sephadex LH-20, revised silica gel and HPLC were used to separate the compounds, and spectroscopic techniques including NMR and MS were implied to determine the structures. Totally 3 compounds were isolated, and their structures were identified as 2,11-epoxy-11,13-dihydro-xypicrotoxano-3(15)-lactone (1), 2,4,6-trimethoxyphenol-1-O-β-d-glycoside (2), 3-methylbutan-1-ol β-d-gluco-pyranoside (3). Compound 1 was a new picrotoxane-type sesquiterpene, which is one of the representative components in D. nobile. However, none of the compounds showedα-glucosidase and tyrosinase inhibitory activity, none of them showed activity, and compound 1 show no neuroprotective activity either.
Volume 32,2024 Issue 3
Plant Ecology and Natural resource Management
Plant Physiology and Molecular Biology
Phytochemistry and Chemical Biolgy
Volume 32,2024 Issue 3
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WANG Lin, YI Qi-fei, SONG Xian-li, GUO Fei-li, LU Zhen-hua, XING Fu-wu
2014,22(6):558-566, DOI: 10.11926/j.issn.1005-3395.2014.06.003
Abstract:
In order to understand the landscape restoration of landfill in Big Taipa Hill, Macau, the species composition, vertical structure, floristic components, and community appearance were investigated by using sampling method. The results showed that there were 83 vascular plants in 12 plots of 1200 m2. The floristic composition of the community was dominated by Pantropical genera, account for 38.98%. The community appearance was determined by the micro- and meso-phanerophyte with herbaceous, simple and micromonophylls. The indexes of the landfill community were similar to that of nature plant community, indicated that the restoration of landfill was good. Based on the current situation of landfill, some preferred species for landscape restoration were selected, and suggestions were given for improving landscape. It was recommended that the landscape restoration should be carried out in stages. To get faster and better landscape restoration, proper manual intervention should be taken at different stages of community succession.
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HU Chao, TIAN Huai-zhen, DONG Quan-ying
2012,20(6):602-604, DOI: 10.3969/j.issn.1005-3395.2012.06.011
Abstract:
Anoectochilus lylei Rolfe ex Downie is newly reported to Chinese flora. The detailed morphological descriptions and photoes are also provided. This species is characterized by the white “Y”-shaped lips, epichiles lobes linear-oblong, mesochile with 1-3 short irregular denticles and the spur with 2 peltate calli inside.
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1997,5(3):69-73, DOI: 10.3969/j.issn.1005-3395.1997.3.015
Abstract:
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ZHANG Na, QIAO Yu-na, LIU Xing-zhao, CHU Guo-wei, ZHANG De-qiang, YAN Jun-hua
2010,18(5):502-510, DOI: 10.3969/j.issn.1005-3395.2010.05.006
Abstract:
The characteristics of five nutrient elements (K, Ca, Mg, N and P) in precipitation, throughfall and stemflow were studied in an monsoon broad-leaved evergreen forest at Dinghushan, Guangdong Province. Based on the precipitation allocation principles, the variation and input characteristics of these nutrients were calculated. The results showed that the contents of nutrient elements were in order as rainfall < throughfall < stemfall, in which the contents of K+ and total nitrogen (TN) were the highest, and those of total phosphorus (TP), HPO42- and total organic phosphorus (TOP) were the lowest. The biggest variation coefficient (Cv) of ion contents in precipitation was 1.282 for total organic nitrogen (TON), and the smallest was 0.502 for NO3-, while those in throughfall were 2.357 for TOP and 0.621 for TN, respectively. There were no significant relation between tree species and the contents of element (P>0.05). The annual inputs of nutrient elements from throughfall and stemflow into the soil were in the order as: TN>K+> Ca2+>Mg2+>TP. The annual input of Ca2+ from throughfall and stemflow were higher than that from litterfall decomposition. It concluded that rainfall was an important factor in transferring nutrient elements from forest canopy to soils.
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WANG Qing-bing, ZHANG Jian-feng, CHEN Guang-cai
2013,21(5):479-488, DOI: 10.396/j.issn.1005-3395.2013.05.016
Abstract:
The isotope tracer technology is a kind of method by adding exogenous elements or substance as a tracer co-operating in organism completely, which used to indicate the change process of elements or substance in organism. Nitrogen stable isotope tracer technology can reveal essentially the mechanism of ecological process, so it becomes one of important tools for ecology research. In order to understand the advances in application of nitrogen stable isotope technique in nitrogen cycle of plant-soil system, nitrogen cycle based on 15N tracer technique was reviewed. The nitrogen stable isotope technique in solving ecology problems was prospected and some existing shortcomings are also discussed.
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2014,22(4):323-334, DOI: 10.3969/j.issn.1005-3395.2014.04.001
Abstract:
Both herbarium and field observations have shown that Delphinium pseudothibeticum W. T. Wang & M. J. Warnock described from Mo-ting (= Mao-ding) Shan, Deqen, northwestern Yunnan, China, is identical with D. ceratophorum Franch. var. brevicorniculatum W. T. Wang, and that both D. motingshanicum W. T. Wang & M. J. Warnock and D. caeruleum Jacq. ex Camb. var. crassicalcaratum W. T. Wang & M. J. Warnock, also described from Mo-ting Shan, are identical with D. beesianum W. W. Smith (D. motingshanicum is no more than a gigantic form of D. beesianum). Delphinum ceratophorum var. brevicorniculatum is currently known only from Deqen, while D. beesianum is a very common species in northwestern Yunnan. Delphinium pseudothibeticum, D. motingshanicum and D. caeruleum var. crassicalcaratum are all synonymized.
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2003,11(2):190-196, DOI: 10.3969/j.issn.1005-3395.2003.2.021
Abstract:
Recent studies on plant responses to elevated CO2 is reviewed. Increase in atmospheric CO2 concentration affects not only global climate but also plant morphology, water use, protein synthesis, photosynthesis, resistance, growth, biomass and so on. Elevated CO2 has effects of promoting the growth of plant roots and seedlings, making the leaf thick, lowering the stomatal density, stomatal conductance and transpiration, enhancing the water use efficiency, crop yield and biomass, intensifying the biosynthesis of ethylene and antioxygen competence. High CO2 concentration together with other environmental factors affect plants. Plants with different photosynthetic pathways (C3, C4 and CAM) and different vegetation types (natural and artificial vegetation) exhibite different responses to high CO2 concentration. Short-term exposure to elevated CO2 enhances photosynthesis while long-term inhibits. Experimental conditions such as air pressure, temperature, water availability, nutrition status, oxygen, light intensity even growth space also have great effect on the results of the experiments.
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MA San-mei, LIN Wen-le, YANG Wei-dong
2010,18(5):497-501, DOI: 10.3969/j.issn.1005-3395.2010.05.005
Abstract:
The changes in stomatal distribution, density and stomatal index of Canna generalis Bailey flower at different development stages were studied. The results showed that stomata distributed in upper and lower epidermis of petal, bract and calyx. Stomatal density and stomatal index on upper epidermis of petal, bract and calyx were smaller than those on lower surface. With the development of flower, the stomatal density and stomatal index on the petal, bract and calyx increased firstly and then decreased.
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2014,22(2):107-120, DOI: 10.3969/j.issn.1005-3395.2014.02.001
Abstract:
We point out that the inclusion of east China's Jiangsu Province in the distribution of Ligularia przewalskii, a species actually occurring only in Gansu, Qinghai, Nei Mongol (Inner Mongolia), Ningxia, Shaanxi, Shanxi, and Sichuan, most likely is a result of misinterpreting "Kansu (= Gansu)" as "Kiangsu (= Jiangsu)". This inadvertent error first appeared in Flora Reipublicae Popularis Sinicae 77(1), and was widely perpetuated in subsequent publications. Critical comments are made on some problems apparent in floristic works (particularly regional Floras at provincial level) of China.
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Li Meiru, Liu Hongxian, Wang Yirou
1997,5(3):74-82, DOI: 10.3969/j.issn.1005-3395.1997.3.016
Abstract:
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LIN Juan， ZHOU Xuan-wei， TANG Ke-xuan， CHEN Fang
2004,12(3):285-290, DOI: 10.3969/j.issn.1005-3395.2004.3.018
Abstract:
This paper briefly reviews the studies of medicinal plant Jatropha curcas on the following aspects: morphology and habitat; effective components including terpens, flavons, fats, coumarins, sterols, etc.; toxicity and pharmacological activities; medicinal use; and application prospects.
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HUANG Jun-zhe, GU Song*，HUANG Ya-nan, ZHENG Qiang, TIAN Jun-ying，JIANG Sha*
2007,15(3):219-223, DOI: 10.3969/j.issn.1005-3395.2007.3.006
Abstract:
The development of primary vascular tissues of root-stem transitional region was studied in Robinia pseudoacacia L. seedlings of 1-12 days using sequential paraffin section. The primary vascular tissues of roots are connected with the cotyledons via the hypocotyl. The results support the viewpoints of Esau et al. that the whole seedling of Robinia pseudoacacia L. is divided into two systems of the root-hypocotyl-cotyledon and the epicotyl, and there is only a simple linkage between the vascular tissues of stem and the hypocotyl without any transition.
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LI Wei, MEI Wen-li, ZUO Wen-jian, WANG Hao, DAI Hao-fu
2014,22(2):201-212, DOI: 10.3969/j.issn.1005-3395.2014.02.015
Abstract:
The chemical constituents of Aquilaria sinensis mainly include flavonoids, benzophenones, lignans, phenylpropanoids, terpenoids, alkaloids, steroids, phenolic compounds. Some of them have anti-tumor, antibacterial, anti-inflammatory, analgesic, and laxative activities. The chemical constituents isolated from A. sinensis were reviewed, and the biological activities of some compounds were also introduced. These would provide scientific basis for development and utilization of A. sinensis.
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YI Qi-fei， XING Fu-wu*， HUANG Xiang-xu， CHEN Hong-feng， WANG Fa-guo
2005,13(1):65-69, DOI: 10.3969/j.issn.1005-3395.2005.1.013
Abstract:
Fifteen medicinal Bulbophyllum species in China are presented. The local names, distribution, habitat, and folk medicinal uses are given. Bulbophyllum species used as folk herbs are mostly distributed in south and south-west China, in particular, in Yunnan Province. Some species such as B. kwangtungense, B. odoratissimum and B. ambrosia are common in Guangdong and Guangxi. Some suggestions for the conservation and reasonableutilization of the plant resources are made.
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YANG Xiao-hong, CHEN Xiao-yang, LIU Ke-feng
2006,14(3):256-262, DOI: 10.3969/j.issn.1005-3395.2006.3.016
Abstract:
Cytokinins are important plant hormones and can delay plant senescence, In this review three approaches in study of the effects of cytokinins on plant senecence are presented： the analysis of endogenous cytokinins during senescence； the application of exogenous cytokinins； and the research on transgenic plants with cytokinin biosynthesis or biodegradation genes. The mechanisms of cytokinins in retarding of senescence was discussed in relation to saccharides, lipid oxidation, as well as to other hormones.
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XIE Xian-qiang, WU Ping, LIN Li-dong, LIU Mei-fang, WEI Xiao-yi*
2007,15(5):450-454, DOI: 10.3969/j.issn.1005-3395.2007.5.015
Abstract:
Twelve chemical constituents were isolated from Polygonum chinense Linn. On the bases of spectral data, they were identified as syringic acid (1), apigenin (2), 3,3′-di-O-methylellagic acid (3), gallic acid (4), protocatechuic acid (5), isorhamnetin (6), caffeic acid (7), quercetin (8), luteolin (9), gallicin (10), avicularin (quercetin-3-O-α-L-arabinofuranoside)(11) and 3,4,8,9,10-pentahydroxy -6H-dibenzo [b,d]pyran-6-one (12). All these compounds except 4 and 8 were reported from the species for the first time.
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CHEN Xin-jian， LIU Guo-shun， CHEN Zhan-kuan， ZHI Yu-bao， YI Ming-lin， LIU Hong-xian
2002,10(1):83-98, DOI: 10.3969/j.issn.1005-3395.2002.1.018
Abstract:
This review contents a brief retrospection of physiological functions of plant hormone，ethylene The progresses concerned three important enzymes：SAMS，ACS and ACO in ethylene biosyn-thetic pathway are highlighted The possible methods to control endogenous ethylene’s productionin fruits or flowem by genetic engineering are outlined．
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2004,12(3):280-284, DOI: 10.3969/j.issn.1005-3395.2004.3.017
Abstract:
The development of annona fruit production is restricted due to the difficulty in fresh-keeping of the fruits during storage and transportation. This paper reviews postharvest physiology of annonas, including respiration and ethylene production, relevant enzymes, fruit softening, fruit browning, and postharvest pathology.
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CHEN Rong, ZHANG Xin-hua, MA Guo-hua*
2014,22(1):53-60, DOI: 10.3969/j.issn.1005-3395.2014.01.009
Abstract:
In order to understand the parasitic relationship between Santalum album L. and leguminous plants, eleven leguminous species were planted with S. album. The leaf photosynthetic characters, height and base diameter of S. album and its haustoria number and size were studied. The results showed that number and size of haustoria, height and base diameter of S. album had significant differences among different hosts. The excellent hosts for S. album were Calliandra haematocephala, Caesalpinia sappan, Acacia confusa and Erythrina corallodendron, and Acacia mangium, Dalbergia odorifera and Cassia surattensis were just general hosts, while Delonix regia, Ormosia pinnata, Leucaena leucocephala and Bauhinia blakeana were unsuitable hosts. Meanwhile, the height and diameter, leaf photosynthesis characters of S. album had close relation with number of haustoria parasitized on roots of leguminous plants. So, the plantation of S. album should choose appropriate host plant.
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MA Guo-hua，HE Yue-min，ZHANG Jing-feng，CHEN Fu-1ian
2005,13(3):233-238, DOI: 10.3969/j.issn.1005-3395.2005.3.008
Abstract:
Semi-parasitism in the sandalwood(Santalum album L．) seedlings was studied on the basis of propagation of different host plant species． The sandalwood plants can grow normally without host plant during seed germ ination and early seedling stage． However， the subsequent growth needs suitable host plant for roots to be parasitized． The experiment indicated that host plant species had great impact on the growth of sandalwood seedlings and their root haustoria， which revealed the differences in haustorium number， size and adhesiveness．Based on our preliminary study， host plants species， such as Hibiscus rosa—sinensis and Phyllanthus reticulatus were found good for the growth of sandalwood seedlings． It was observed that the sandalwood roots lacked root hairs， but its vessels were well developed， which is benefit for absorption of water an d nutrition from the host roots．The process ofroot semi-parasitism ofsandalwood in Hibiscus was also investigated．
