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XIAO Yihua, FU Zhihao, XU Han, ZOU Jianping, BEN Chunli, SHI Xin, CAO Guosong
2024,32(6):695-704, DOI: 10.11926/jtsb.4828
Abstract:
The research on the interspecific relationship, niche status and community stability of dominant plants in evergreen broad-leaved forests in special habitats can provide scientific basis for the conservation of regional biodiversity and the conservation and management of nature reserves. Based on the filed investigation data of long-term plots in Guangdong Grand Canyon and 2×2 correlation tables, the importance value, niche width and niche overlap of dominant species were determined. The index of interspecific associations, OI index and DI index for dominant species were analyzed by using variance ratio method and χ2 test. Moreover, the community stability was evaluated by Godron method. The results showed that there were 104 species, belonging to 39 families and 74 genera, in which the importance value and niche width of Schima superba were the biggest, followed by Machilus chinensis, Heptapleurum heptaphyllum, Diospyros morrisiana and Engelhardia roxburghiana. These five species occupied a dominant position in the competition for community resources and had a high niche overlap with other plants in the community (67.16% of the total). In 325 pairs of 26 dominant species, negative associations were greater than positive associations. χ2 test showed that the species were relatively independent and loosely connected. However, the five dominant species showed close correlation, and the concomitant occurrence rate was high. Godron method analysis showed that the community was in an unstable state and there was a significant negative correlation between species. Therefore, it was revealed that the interspecific association of the community in broad-leaved evergreen forests in Guangdong Grand Canyon had weak interspecific association and unstable community, which needs to be strengthened for conservation and management.
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YU Qun, GAO Wei, SHI Jiayi, FU Chengjie, LIN Guojiang, KANG Tianqi, QIU Min
2024,32(6):705-714, DOI: 10.11926/jtsb.4787
Abstract:
Leaf functional traits can reflect the adaptation strategies of plant to environment. Based on the sample survey, six wild Rosa anemoniflora communities at different altitude in Yanping District, Fujian Province were selected to study the effects of environment factors on leaf functional traits by using coefficient of variation, Pearson correlation analysis and redundancy analysis. The results showed that the habitat heterogeneity of R. anemoniflora communities was strong, the CV of soil factors under different environment ranged from 9.44% to 122.28%, among which soil pH was the smallest, and soil available phosphorus content was the largest. There are significant differences among soil factor indexes under different environment. The soil pH, contents of organic matter, total nitrogen (N), phosphorus (P) and potassium (K) and available nitrogen (AN), phosphorus (AP) and potassium (AK) were high in the middle altitude areas, and the soil stoichiometric ratio was low, while the soil moisture content and soil stoichiometric ratio were the highest in the high altitude areas. Under different environment, the CV of leaf functional traits of R. anemoniflora ranged from 2.49% to 97.58%, among which leaf water content was the smallest, and the specific leaf weight was the largest. Along the altitude, the contents of P, K, calcium (Ca) and magnesium (Mg) in leaves showed an increasing trend, indicating that the diversity of leaf functional traits was abundant, and had strong adaptability to heterogeneous habitats. Pearson correlation analysis showed that the dry matter content was significantly positively correlated with Ca content in leaves, and the contents of K and Mg were negatively correlated with C/N and N/P in leaves. Rosa anemoniflora at high altitude could increase stress resistance by improving the absorption of K, Ca and Mg to cope with habitat changes. The redundancy analysis showed that soil AK and water content were the main driving factors of leaf functional trait change with environment. Therefore, it was suggested that the leaf of R. anemoniflora adapted to the changes of altitude and habitat through functional trait variation and trait combination. The study on the functional traits of R. anemoniflora leaves and their relationship with environment factors would help to understand the impact of small-scale environmental changes on plant variation, and provide theoretical guidance for the conservation, development and genetic improvement of wild resources of R. anemoniflora.
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WEN Qingyan, XIAO Jihong, HUANG Aqing, HUANG Yunteng, DENG Qingya, CAO Shengxuan, DENG Chuanyuan
2024,32(6):715-724, DOI: 10.11926/jtsb.4848
Abstract:
Understory plant diversity and soil physicochemical properties are the key indicators of soil and water conservation stability and growth ability. Five typical stand types on Pingtan Island were selected, including Acacia confusa forest (I), Pinus thunbergii forest (II), A. confusa + Casuarina equisetifolia forest (III), P. thunbergii + A. confusa forest (IV) and P. thunbergii + Eurya emarginata forest (V), the differences of understory plant diversity and soil physicochemical properties in different stand types were analyzed, and explored their relationships through redundancy analysis (RDA). The results showed that the mixed forest of P. thunbergii + A. confusa was more beneficial to enrich the species diversity in the understory, while the community structure of A. confuse + C. equisetifolia forest was simple with low species diversity. The soil physicochemical properties of different mixed forests were different. Compared with pure forest, the mixed planting of tree species was beneficial to increase the total potassium content of soil, and A. confuse + C. equisetifolia and P. thunbergii + E. emarginata forest were beneficial to enhance soil organic matter content, total nitrogen, alkali-hydrolytic nitrogen and available phosphorus. Soil total K and water soluble salt had the greatest influence on species diversity in understory, and total K was negatively correlated with species diversity index in shrub layer and herbaceous layer. The total water soluble salt was positively correlated with the species diversity index of shrub layer and negatively correlated with the species diversity index of herbaceous layer. Therefore, in order to improve the species diversity of the understory, the mixed planting of P. thunbergii + A. confusa could be considered. To improve soil fertility, mixed planting of A. confusa + Casuarina equisetifolia, P. thunbergii + A. confuse could be considered. At the same time, tree species coordination was carried out through artificial tending, thinning and replanting, so as to reduce allelopathy of Casuarina equisetifolia, control total potassium and water soluble salt content in soil for promote long-term stable development of community.
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XU Xueqing, LI Wenjun, ZHOU Xuewen, LÜ Shihong, BAI Kundong
2024,32(6):725-736, DOI: 10.11926/jtsb.4842
Abstract:
To explore the formation and maintenance mechanisms of the understory plant diversity, the ecological stoichiometric characteristics of leaves of understory trees, shrubs, herbs and vines and their relationship with phylogeny were studied by conventional and phylogenetic comparison methods in Maoershan subtropical evergreen broad-leaved forest, Guangxi. The results showed that the phylogenetic signals (Blomberg’s K) of leaf stoichiometric characteristics ranged from 0.020 to 0.183. The contents of N and P and the phylogenetic signals of C/P, P/Ca and K/Ca in leaves were significant, indicating that phylogenetic conservation existed in the process of species diversification. The contents of C, N, K and Mg in leaves and most of stoichiometric ratios were significantly affected by life form. The contents of N, K and Mg in leaves of vines were the highest, while the contents of C, Mg, C/N and C/P in leaves of herb were the lowest, which indicated that there were differences in the requirement and proportion of nutrient elements in leaves of different life forms. The stable selection of the optimal ecological stoichiometric characteristic values of leaves of different life forms was the optimal evolutionary model, which indicated that plants of different life forms chose the optimal combination of leaf stoichiometric characteristics to adapt to themselves in the evolutionary process. In addition, there was a close correlation between the stoichiometric characteristics of leaves during evolution. Therefore, phylogenetic conservation of leaf ecological stoichiometric characteristics and optimal stable selection in the process of species diversification jointly promoted the formation and maintenance of understory plant diversity in subtropical evergreen broad-leaved forests.
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LIU Dejie, LUO Hanyu, CHENG Yan, LI Xu, LIU Xujun, YANG Shifu, CHEN Fuqiang, QU Chao, LIU Juxiu, LIE Zhiyang
2024,32(6):737-746, DOI: 10.11926/jtsb.4834
Abstract:
Acacia mangium is an important fast-growing tree in South China, but mature forest shows phosphorus deficiency which may reduce forest efficiency, so it needs to be reconstructed. Phosphorus, including four levels as control treatment (CK), low phosphorus addition (LP), medium phosphorus addition (MP), and high phosphorus addition (HP), were added into two forest reconstruction mode, such as M1 (Ormosia pinnata + Castanopsis hystrix + Cinnamomum camphora + Magnolia glauca) and M2 (Michelia macclurei + Carallia brachiata + Schima superba + Mytilaria laosensis) in a mature A. mangium plantation of Longyandong Forestry Farm of Guangdong Province. The growth and leaf nutrients of the modified tree species were measured after 39 months. The results showed that the total biomass of M1 species was the highest in MP (29.91 kg), and that of M2 species was the highest in HP (29.98 kg). The biomass of Michelia macclurei, Carallia brachiata and Mytilaria laosensis was the highest in HP, which was 5.97, 10.3 and 10.69 kg, respectively. The biomass of Ormosia pinnata, Castanopsis hystrix and Magnolia glauca was the highest at MP (5.12, 6.91 and 11.46 kg, respectively), the biomass of Cinnamomum camphora was the highest at LP (10.4 kg), and the biomass of Schima superba was the highest at CK (4.45 kg). The average phosphorus content of leaves of M2 species was higher than that of M1, but the average N:P in leaves of M2 species was lower than that of M1. Therefore, the phosphorus addition increased the phosphorus content and decreased N:P in the leaves of all modified tree species, which provided a scientific reference for the phosphorus addition gradient and the selection of modified tree species in mature A. mangium plantations in South Asia.
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FENG Mingchun, XIE Huiyan, DENG Ninglong, LI Jiacheng, LUO Zhen, LU Dehao, LIN Na
2024,32(6):747-756, DOI: 10.11926/jtsb.4836
Abstract:
To understand the niche characteristics and succession status of subtropical evergreen broad-leaved secondary forest community in Dongguan, Guangdong Province, three 1 hm2 plots were set up. Levins niche width and Pianka niche overlap are used to analyze the niche characteristics of the dominant tree species of the evergreen broad-leaved secondary forest community in Mashan and Yinpingshan Nature Reverses in Dongguan. The results showed that the secondary forest communities in Mashan and Yinpingshan were mainly composed of Lauraceae, Rutaceae, Theaceae, Iteaceae, Rubiaceae. The niche width of Acronychia pedunculata, Shichima superb, Machilus chinensis, Cinnamomum parthenoxylon, Itea chinensis in communities was large, and the niche width was closely related to the frequency. The niche overlap of dominant tree species ranged from 0 to 0.53, indicating that the competition of dominant tree species was weak. The succession stages of the three plots are different. The niche width and the niche overlap of heliophytes were large in Yinpingshan communities, while those of mesophytes in Mashan community were relatively larger, reflecting the replacement process of evergreen broad-leaved forest from heliophytes to mesophytes, these would provide scientific basis for the protection and management of secondary forest in this area.
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ZHANG Ming, LIANG Jianming, JIANG Qinglian, JIANG Lei, WU Yufen, SHAO Yanqing, SHAO Ling, TANG Guangda
2024,32(6):757-771, DOI: 10.11926/jtsb.4833
Abstract:
To understand the similarities and differences in the rhizosphere bacterial communities of different limestone endemic plants, five species of limestone endemic plants in northern Guangdong were studied, including Saxifraga daqiaoensis, Begonia leprosa, Primulina alutacea, P. polycephala and P. yangshanensis. The rhizosphere bacterial community characteristics and functional component of five limestone endemic plants were analysed by using high-throughput 16S rDNA sequencing and bioinformatics methods. The results showed that 42 phyla, 113 classes, 250 orders, 315 families, and 498 genera bacteria were detected in rhizosphere soil of five plants. Chloroflexi, Bacteroidetes, Actinobacteria, Planctomycetes, Proteobacteria and Acidobacteria were the dominant phyla. Heatmap analysis indicated that the soil physical and chemical factors, including available phosphorus, exchangeable calcium, ammonium nitrogen, soil organic matter, pondus hydrogenii and total nitrogen, played important roles in the composition of bacterial community. The LEfSe analysis showed that different plants enriched different rhizosphere bacterial population. The composition and function of the rhizosphere bacterial community of B. leprosa was significantly different from those of the other four plants. The prediction of PICRUSt2 function showed that the rhizosphere bacterial communities of five plants were the most active in metabolism. The function prediction of FARPOTAX showed that chemoheterotrophy, aerobic chemoheterotrophy, nitrification and aerobic ammonia oxidation were the common dominant functional population in the rhizosphere bacteria of five plants. These functional bacteria play an important role in helping plants grow and develop. It would provide soil microenvironment data for the introduction and domestication of endemic plants in limestone.
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LIAO Xiaoli, XUE Kexin, CAI Siying, LI Peiyao, LIN Junyi, YU Yue, HUANG Wei, JIN Shaofei, ZHENG Dexiang
2024,32(6):772-780, DOI: 10.11926/jtsb.4910
Abstract:
In order to investigate the effects of exogenous silicon addition on the growth of Phoebe bourneiseedlings under light stress, the changes of different light intensity and silicon addition in the growth, biomass, leaf morphology and photosynthetic parameters of P. bourneiseedlings were analyzed. The results showed that shading and silicon addition had significant effects on the growth and photosynthetic traits of seedlings. Moderate shading and silicon addition were beneficial to the growth of seedling height, ground diameter, biomass of organs and leaf morphology (length, width and area) of seedlings. The decrease of light intensity was conducive to the accumulation of chlorophyll in leaves, and the addition of silicon further promoted the accumulation of chlorophyll in the 15%-60% light intensity, which made seedlings better adapt to light stress. The addition of 1 000 to 2 000 mg/kg silicon under 15% to 40% light intensity could improve the chlorophyll fluorescence parameters in leaves and promote photosynthesis. The addition of 1 000~2 000 mg/kg silicon under 40% light intensity was more conducive to improving the net photosynthetic rate, stomatal conductance and transpiration rate of leaves, reducing the intercellular CO2 concentration, promoting the improvement of photosynthetic capacity of seedlings, and improving the adaptability of seedlings to light stress. Therefore, the regeneration of P. bournei seedlings was suitable under certain shade conditions, and the addition of silicon was conducive to alleviating light stress, improving the leaf morphology and photosynthetic efficiency of seedlings under different light intensity, improving their growth adaptability to light stress, and then promoting the growth of seedlings, which is conducive to the improvement of afforestation and regeneration effect.
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LONG Guigen, HUANG Zhiyun, WU Nansheng, FENG Sheng, FENG Chao, DING Fei, JIN Songsong, HE Liren, WANG Yong, CHEN Ling
2024,32(6):781-790, DOI: 10.11926/jtsb.4914
Abstract:
In order to analyze the variation pattern and genetic diversity of Choerospondias axillaris germplasms in typical distribution areas, fourteen fruit traits of 20 germplasms from 7 provinces were systematically analyzed and comprehensively evaluated. The results showed that there were variation and genetic diversity of 14 fruit traits in 20 germplasm resources. The variation coefficients of fruit traits except fruit shape index and edible rate were more than 10%, and the average genetic diversity index of fruit traits was 1.88. The correlation analysis showed that the single fruit weight of C. axillaris was positively correlated with the indexes of peel weight, kernel weight, pulp weight and transverse diameter, and the correlation coefficient was greater than 0.93. The 20 germplasms of C. axillaris were divided into 2 groups by cluster analysis, and the group II was further divided into 3 subgroups, and there were significant differences in fruit traits between 2 groups, and the biggest difference was single fruit weight. A comprehensive analysis model was established based on the principal component comprehensive scoring method. The 17#, 16#, 10#, 91# germplasms were selected, which had the characteristics of large fruit, high Vitamin C content, high total sugar content, and good comprehensive traits, and could be used as excellent germplasm resources for cultivation. Therefore, the fruit traits of C. axillaris germplasms had rich variation and genetic diversity, the selected 4 germplasm resources for fruit use had high breeding value and potential for development and utilization.
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WEI Juan, MA Yonghong, MAO Ping
2024,32(6):791-799, DOI: 10.11926/jtsb.4923
Abstract:
In order to understand the effects of light intensity on growth of Cercidiphyllum japonicum seedlings, one-year-old seedlings were grown under 10% (L1), 25% (L2), 100% (L3), 110% (L4), and 125% (L5) natural light intensity, and the adaptive ability in morphology and physiology of seedlings was studied. The results showed that the increase of plant height, biomass, leaf length, leaf width, and leaf area increased at first and then decreased with the increase of light intensity, and all of them reached the highest under L2. The specific leaf area, leaf water content, and root shoot ratio continued to decrease, while the base diameter increased continuously. The peroxidase activity under L1 and L2 was significantly higher than that under L4 and L5, while the changes in malondialdehyde content was the opposite. With the increase of treatment time, the superoxide dismutase activity under L2 increased at first and then decreased, which under L1 continued to increase and was higher than that under L3, L4 and L5. The contents of total chlorophyll, chlorophyll a and chlorophyll b decreased with the treatment time, and the stronger the light, the lower the content. Therefore, Cercidiphyllum japonicum seedlings could grow under both shade and strong light, and 25% natural light intensity was more suitable.
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LIN Wenjun, FU Houhua, LIAN Hui, TU Xiongde, CHEN Shipin
2024,32(6):800-806, DOI: 10.11926/jtsb.4912
Abstract:
A new species of Sophora(Leguminosae), S. elongata S. P. Chen & W. J. Lin, was found in Wuyishan National Park, Fujian Province, which was most similar to S. flavescens in morphology. Their difference between the two species was that the plant was short, the raceme was 40 cm, and the calyx was 2 mm×3 mm. The phylogenetic tree constructed based on three nuclear DNA fragment combinations (ETS, ITS, SQD1) and four chloroplast DNA fragment combinations (matK, rbcL, rpl32-trnL, trnL-F) showed that S. elongata had an independent position on the phylogenetic tree, which supported that S. elongata was a new species of Leguminosae, but its phylogenetic position was independent and there was nuclear-cytoplasmic conflict, presumably due to ancient hybridization or incomplete phylogenetic sorting.
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LI Zhuoran, WENG Shufei, JIANG Piao, LIANG Qiantong
2024,32(6):807-812, DOI: 10.11926/jtsb.4846
Abstract:
Vines are important components of tropical-subtropical forests ecosystems. Guangdong Province is located in the northern edge of the tropics to the middle subtropics, with abundant resources of climbing plants. Based on the literature of plant resources of Guangdong Province, the geographic composition of climbing plants, as well as their functional types and potentials for landscape applications, were systematically reviewed from a phylogeographic perspective. The results showed that there are 754 species (including varieties and forms) of climbing plants in 68 families and 216 genera in Guangdong, of which 48 families and 145 genera belonged to the tropics, with typical tropical characteristics. There are 651 species of native vines, 103 species of exotic vines, 341 species of vines with food and medicinal value, 138 species of ornamental vines commonly used in gardens, and 57 species with application potential. There were more species of woody rattan than grass rattan, and the climbing methods are mainly twining and tendrils. The zonality, functionality and species diversity of climbing plants in urban green spaces in Guangdong Province could be improved by increasing the application of native climbing plants, combining vines and lianas, and using climbing plants with high ornamental value.
Volume 32,2024 Issue 6
Plant Ecology and Natural resource Management
Plant Physiology and Molecular Biology
Plant Systematics and Biogeography
Volume 32,2024 Issue 6
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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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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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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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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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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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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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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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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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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 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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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 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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YU Jieyu, LI Shuqiang, WANG Yunhui, FAN Tian, Lü Tianxiao, ZHOU Yuping, TIAN Chang'en
2024,32(4):451-457, DOI: 10.11926/jtsb.4790
Abstract:
In Arabidopsis thaliana, IQM family is a calmodulin-binding protein family containing IQ motifs, IQM3 mutation can increase main root length, CO (CONSTANS) is an important member of photoperiodic floral regulation pathway, CO mutation can shorten taproot length. The genetic relationship between IQM3 and CO gene was studied by constructing double mutants of IQM3 and CO. The results showed that the first exon in co-12 sequence of the new CO mutant was missing 9 base ACTTGCTAG, which contains the restriction endonucrenase BfaI restriction site CTAG. A molecular marker was established to identify the mutant. When the cross-coding PCR product was cleaved by BfaI enzyme, four fragments were obtained from wild-type Col because it had three sites, three fragments were obtained from co-12 because it had only two sites, and five fragments were obtained from CO/co-12 heterozygote. Under long sunshine, the main root length of co-12 was shorter than that of wild type Col, and that of iqm3-2 was longer than that of wild type, while the phenotype of double mutant co-12 iqm3-2 was more favorable to iqm3-2. Therefore, IQM3 acts downstream of CO to regulate main root length under long day in Arabidopsis.
