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| 遮荫对濒危植物崖柏光合作用和叶绿素荧光参数的影响 | |
| 引用本文： | 刘建锋,杨文娟,江泽平,郭泉水,金江群,薛亮.遮荫对濒危植物崖柏光合作用和叶绿素荧光参数的影响[J].生态学报,2011,31(20):5999-6004. |
| 作者姓名： | 刘建锋 杨文娟 江泽平 郭泉水 金江群 薛亮 |
| 作者单位： | 1. 中国林业科学研究院林业研究所,北京,100091;国家林业局林木培育重点实验室,北京,100091 2. 中国林业科学研究院林业研究所,北京,100091 3. 中国林业科学研究院森林生态环境与保护研究所,北京,100091 |
| 基金项目： | 中央级公益性科研院所基本科研业务费专项资金(RIF2010-15); 国家林业局野生植物保护管理项目(1691000401) |
| 摘 要： | 崖柏(Thuja sutchuenensis)是我国特有的极度濒危植物。目前尚缺乏从光合生理角度对其濒危机制开展讨论与研究。光是影响植物生存和生长发育最重要的环境因子之一,且有可能成为植物种群自然更新的主要限制因子。因此,通过人工遮荫方式,探讨了3种光环境下(L0全光,L1-50%全光,L2-25%全光)崖柏幼苗的光合能力及叶绿素荧光参数的差异。结果表明,遮荫导致了叶片表观量子效率和最大净光合速率增加。随着生长光强的降低,崖柏幼苗的暗呼吸速率、光补偿点和光饱和点均有所下降。叶绿素荧光参数方面,遮荫导致了PSⅡ原初光能转换效率(Fv/Fm)、PSⅡ潜在活性(Fv/Fo)、PSⅡ有效光量子产量(Fv'/Fm')和非光化学猝灭系数(NPQ)增加;但随着生长光强减弱,崖柏幼苗叶片的光化学猝灭系数(PQ)和电子传递速率(ETR)逐渐降低。同时,遮荫也造成了叶片叶绿素含量(Chla+Chlb)的显著增加。结果表明,崖柏对光具有较强的耐受范围(尤其是低光)和内在调节机制,初步判定崖柏林下光照的不足不会成为崖柏自然更新的决定性限制因子。 |
| 关 键 词： | 崖柏 遮荫 光合作用 叶绿素荧光 光适应 |
| 收稿时间： | 2011/6/21 0:00:00 |
| 修稿时间： | 2011/7/11 0:00:00 |
Effects of shading on photosynthetic characteristics and chlorophyll fluorescence parameters in leaves of the endangered plant Thuja sutchuenensis |
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| LIU Jianfeng,YANG Wenjuan,JIANG Zeping,GUO Quanshui,JIN Jiangqun and XUE Liang.Effects of shading on photosynthetic characteristics and chlorophyll fluorescence parameters in leaves of the endangered plant Thuja sutchuenensis[J].Acta Ecologica Sinica,2011,31(20):5999-6004. | |
| Authors: | LIU Jianfeng YANG Wenjuan JIANG Zeping GUO Quanshui JIN Jiangqun and XUE Liang |
| Institution: | Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China;Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;Research Institute of Forest Ecology, Environment and Protection, CAF, Beijing 100091, China;Research Institute of Forest Ecology, Environment and Protection, CAF, Beijing 100091, China;Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China |
| Abstract: | Thuja sutchuenensis Franch.is a critically endangered plant that is endemic to China.Currently,no research has addressed its endangered status from the perspective of its photosynthetic mechanism.Light is one of the most important environmental factors that can affect plant survival and growth and could become a major limiting factor for natural regeneration.Therefore,we focused on the adaptive ability of T.sutchuenensis seedlings under three light levels(L0 = full light;L1 = 50% full light;L2 = 25% full li... |
| Keywords: | Thuja sutchuenensis shade photosynthetic chlorophyll fluorescence acclimation to light |
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