不同光环境对海南龙血树幼苗表型可塑性及生存策略的影响
作者:
基金项目:

国家自然科学基金项目(31360071);海南省重点研发计划项目(ZDYF2016179)资助


Effects of Light Intensity on Phenotypic Plasticity and Survival Strategy of Dracaena cambodiana Seedlings
Author:
  • 摘要
  • | |
  • 访问统计
  • |
  • 参考文献 [24]
  • |
  • 相似文献
  • | | |
  • 文章评论
    摘要:

    为了解光照对海南龙血树(Dracaena cambodiana)幼苗生长的影响,研究了不同光照环境下海南龙血树幼苗形态、生理特性和生物量分配的变化,并分析了其生态适应性。结果表明,海南龙血树幼苗的形态、生理和生物量分配指标在不同光照强度间存在显著差异,各指标的可塑性指数为0.08~0.86,其中根茎叶及总生物量的可塑性指数普遍较高(0.67~0.86),表明海南龙血树幼苗有较好的光照适应性,其策略主要是通过调整根茎叶生物量的分配来适应光照的变化。随着光照强度的降低,海南龙血树幼苗的比叶面积、叶根比呈现显著增大趋势,表明幼苗可通过增加单株叶面积比例,扩大光合作用面积,有效调节自身生物量配置。37.3%自然光照(L2)是海南龙血树幼苗生长的最佳光照强度。现存海南龙血树生境改变,生境缺少林荫以致光照强度过大,不利于幼苗根系生长,难以度过干旱季节,可能是海南龙血树自然更新失败的重要原因之一。

    Abstract:

    In order to understand the effect of light intensity on seedling growth of Dracaena cambodian, the changes in morphological, physiological and biomass allocation characteristics were studied under four kinds of light intensity, including 100%, 37.3%, 15.5%, and 4.2% nature sunlight. The results showed that there were significant differences in morphological, physiological and biomass allocation indexes among different light intensities. The PI (plasticity indices) of all indexes ranged from 0.08 to 0.86, in which PI of biomass was generally higher (0.67-0.86) than that of the others, indicating that the seedlings had better adaptability to illumination conditions by adjusting the allocation of biomass. With the decrease of light intensity, the specific leaf area (SLA) and leaf area to root mass ratio (LARM) significantly increased, which indicated that the seedling could increase the leaf area and the area of photosynthesis to effectively adjust biomass allocation. In conclusion, the seedling growth of D. cambodiana would be the best under 37.3% NS (L2). Because the existing habitat of D. cambodiana was damaged, and the seedlings lacked shading, it was unfavorable to the growth of seedling root system during the dry season. So, this may be one of important reasons for the failure of the natural regeneration of D. cambodiana.

    参考文献
    [1] Guangdong Institute of Botany. Flora Hainanica, Tomus IV[M]. Beijing:Science Press, 1977:1-155. 广东省植物研究所. 海南植物志, 第4卷[M]. 北京:科学出版社, 1977:1-155.
    [2] Chen X Q, Turland N J. Dracaena Vandelli ex Linnaeus[M]//Wu Z Y, RAVEN P H. Flora of China, Vol. 24. Beijing:Science Press & St. Louis:Missouri Botanical Garden Press, 2000:215-217.
    [3] National Environment Protection Administration, Institute of Botany, Chinese Academy of Sciences. China Rare and Endangered Protective Plant Lists[M]. Beijing:Science Press, 1987:1-38. 国家环境保护局, 中国科学院植物研究所. 中国珍稀濒危保护植物名录[M]. 北京:科学出版社, 1987:1-38.
    [4] ZHENG D J, LI H W, YUN Y, et al. Investigation on the habitat and natural regeneration capacity of Dracaena cambodiana population[J]. J Trop Subtrop Bot, 2010, 18(6):627-632. doi:10.3969/j.issn.1005-3395.2010.06.006. 郑道君, 李海文, 云勇, 等. 海南龙血树种群生境及自然更新能力调查[J]. 热带亚热带植物学报, 2010, 18(6):627-632. doi:10.3969/j. issn.1005-3395.2010.06.006.
    [5] ZHENG D J, YUN Y, WU Y J, et al. Geographical distribution of wild Dracaena cambodiana in China and its relationship with hydrothermal factors[J]. J Trop Subtrop Bot, 2012, 20(4):326-332. doi:10.3969/j. issn.1005-3395.2012.04.002. 郑道君, 云勇, 吴宇佳, 等. 海南龙血树野生资源分布及其与水热关系的分析[J]. 热带亚热带植物学报, 2012, 20(4):326-332. doi:10.3969/j.issn.1005-3395.2012.04.002.
    [6] ZHENG D J, WU Y J, YUN Y, et al. Seed germination and its environment adaptability of endangered tree Dracaena cambodiana[J]. J Trop Subtrop Bot, 2016, 24(1):71-79. doi:10.11926/j.issn.1005-3395.2016.01.010. 郑道君, 吴宇佳, 云勇, 等. 濒危植物海南龙血树种子萌发及其环境适应性分析[J]. 热带亚热带植物学报, 2016, 24(1):71-79. doi:10.11926/j.issn.1005-3395.2016.01.010.
    [7] BRADSHAW A D. Evolutionary significance of phenotypic plasticity in plants[J]. Adv Genet, 1965, 13:115-155. doi:10.1016/S0065-2660(08)60048-6.
    [8] ZHOU H Y, WANG J N, FU X Q, et al. Effects of light environments on the phenotypic plasticity of three shrubs in southern China grassland[J]. Chin J Appl Environ Biol, 2014, 20(6):962-970. doi:10.3724/SP.J. 1145.2014.03029. 周海燕, 王金牛, 付秀琴, 等. 不同光环境对中国南方草地3种灌木表型可塑性的影响[J]. 应用与环境生物学报, 2014, 20(6):962-970. doi:10.3724/SP.J.1145.2014.03029.
    [9] SHI J M, YE X H, CHEN F S, et al. Adaptation of bamboo to heterogeneous habitat:Phenotypic plasticity[J]. Acta Ecol Sin, 2014, 34(20):5687-5695. doi:10.5846/stxb201308062036. 施建敏, 叶学华, 陈伏生, 等. 竹类植物对异质生境的适应——表型可塑性[J]. 生态学报, 2014, 34(20):5687-5695. doi:10.5846/stxb 201308062036.
    [10] YANG Z D. Studies on the determination of chlorophyll content by spectrophotometric method[J]. J Guangxi Agric Univ, 1996, 15(2):145-150. 杨振德. 分光光度法测定叶绿素含量的探讨[J]. 广西农业大学学报, 1996, 15(2):145-150.
    [11] SULTAN S E. Phenotypic plasticity and plant adaptation[J]. Acta Bot Neerl, 1995, 44(4):363-383. doi:10.1111/j.1438-8677.1995.tb00793.x.
    [12] RADFORD I J, COUSENS R D. Invasiveness and comparative life-history traits of exotic and indigenous Senecio species in Australia[J]. Oecologia, 2000, 125(4):531-542. doi:10.1007/s004420000474.
    [13] SUN Y R, ZHU J J, YU L Z, et al. Photosynthetic characteristics of Pinus koraiensis seedlings under different light regimes[J]. Chin J Ecol, 2009, 28(5):850-857. doi:10.13292/j.1000-4890.2009.0157. 孙一荣, 朱教君, 于立忠, 等. 不同光环境对红松幼苗光合生理特征的影响[J]. 生态学杂志, 2009, 28(5):850-857. doi:10.13292/j. 1000-4890.2009.0157.
    [14] ZHOU J H, CHENG X R, YU M K, et al. Responses of growth, leaf traits and biomass allocation of Phoebe sheareri seedlings to different habitats in forest gap[J]. J NE For Univ, 2015, 43(12):21-24,50. doi:10.13759/j.cnki.dlxb.2015.12.003. 周俊宏, 成向荣, 虞木奎, 等. 紫楠幼苗生长、叶性状和生物量分配对林窗不同生境的响应[J]. 东北林业大学学报, 2015, 43(12):21-24,50. doi:10.13759/j.cnki.dlxb.2015.12.003.
    [15] XU F, GUO W H, XU W H, et al. Effects of light intensity on growth and photosynthesis of seedlings of Quercus acutissima and Robinia pseudoacacia[J]. Acta Ecol Sin, 2008, 2010, 30(12):3098-3107. 徐飞, 郭卫华, 徐伟红, 等. 不同光环境对麻栎和刺槐幼苗生长和光合特征的影响[J]. 生态学报, 2010, 30(12):3098-3107.
    [16] FENG X Y, LIU N, GUO J P, et al. Morphological responses and morphological plasticity indices of seedlings and saplings of four woody species in montane forest of northern China to experimental light regimes[J]. Sci Silv Sin, 2013, 49(11):42-50. doi:10.11707/j. 1001-7488.20131106. 冯晓燕, 刘宁, 郭晋平, 等. 控制光照条件下华北山地4个混交树种幼苗幼树的形态响应和可塑性[J]. 林业科学, 2013, 49(11):42-50. doi:10.11707/j.1001-7488.20131106.
    [17] VALLADARES F, WRIGHT S J, LASSO E, et al. Plastic phenotypic response to light of 16 congeneric shrubs from a Panamanian rainforest[J]. Ecology, 2000, 81(7):1925-1936. doi:10.2307/177282.
    [18] XU G F, SHEN S C, ZHANG F D. Adaptability and reproductive characteristics of Mikania micrantha H. B. K. under different habitats[J]. Ecol Environ Sci, 2014, 23(8):1258-1264. doi:10.3969/j.issn.1674-5906.2014.08.002. 徐高峰, 申时才, 张付斗. 异质环境下入侵植物薇甘菊的适应性与繁殖特性[J]. 生态环境学报, 2014, 23(8):1258-1264. doi:10.3969/j.issn.1674-5906.2014.08.002.
    [19] LI D L, XIANG Q B. Effects of light condition on the growth and photosynthetic characters of Phoebe chekiangensis seedlings[J]. J Nanjing For Univ (Nat Sci), 2004, 28(5):29-31. doi:10.3969/j.issn.1000-2006.2004.05.007. 李冬林, 向其柏. 光照条件对浙江楠幼苗生长及光合特性的影响[J]. 南京林业大学学报(自然科学版), 2004, 28(5):29-31. doi:10.3969/j.issn.1000-2006.2004.05.007.
    [20] CHENG X R, ZHOU J H, CHEN Y H, et al. Effects of light intensity on phenotypic plasticity of Gardenia jasminoides seedlings[J]. Acta Agric Univ Jiangxi, 2016, 38(1):180-186. doi:10.13836/j.jjau.2016026. 成向荣, 周俊宏, 陈永辉, 等. 山栀子幼苗表型可塑性对不同光环境的响应[J]. 江西农业大学学报, 2016, 38(1):180-186. doi:10.13836/j.jjau.2016026.
    [21] YAN X F, WANG J L, ZHOU L B. Effects of light intensity on Quercus liaotungensis seed germination and seedling growth[J]. Chin J Appl Ecol, 2011, 22(7):1682-1688. 闫兴富, 王建礼, 周立彪. 光照对辽东栎种子萌发和幼苗生长的影响[J]. 应用生态学报, 2011, 22(7):1682-1688.
    [22] LIN B, LIU Q. Plasticity responses of 4 tree species in subalpine-coniferous-forest to different light regimes[J]. Acta Ecol Sin, 2008, 29(10):4665-4675. 林波, 刘庆. 四种亚高山针叶林树种的表型可塑性对不同光照强度的响应[J]. 生态学报, 2008, 29(10):4665-4675.
    [23] LI Z F, PAN J, WANG J D. The effects of light environment on the growth and the phonotypic plasticity of the seedlings of Phoebe bournei[J]. J SW For Univ, 2014, 34(6):65-69. doi:10.3969/j.issn.2095-1914.2014.06.011. 李肇锋, 潘军, 王金盾, 等. 光环境对闽楠幼树生长及其表型可塑性的影响[J]. 西南林业大学学报, 2014, 34(6):65-69. doi:10.3969/j.issn.2095-1914.2014.06.011.
    [24] LUO J H, LIU J, YANG J D. Cultivation techniques and applications of Dracaena cambodiana[J]. Trop For, 2006, 34(4):28-29. doi:10.3969/j.issn.1672-0938.2006.04.011. 罗金环, 刘俊, 羊金殿. 海南龙血树的栽培技术及其应用[J]. 热带林业, 2006, 34(4):28-29. doi:10.3969/j.issn.1672-0938.2006.04.011.
    相似文献
    引证文献
引用本文

陈宣,张治礼,杨立荣,云勇,陈加利,郑道君.不同光环境对海南龙血树幼苗表型可塑性及生存策略的影响[J].热带亚热带植物学报,2018,26(2):150~156

复制
分享
文章指标
  • 点击次数:1240
  • 下载次数: 1083
  • HTML阅读次数: 374
  • 引用次数: 0
历史
  • 收稿日期:2017-06-23
  • 最后修改日期:2017-09-30
  • 在线发布日期: 2018-03-29
文章二维码