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| 不同水分条件下麻疯树幼苗的光合生理适应性研究 | |
| 引用本文： | 刘永安,骆晓铭,魏建国,杨洪彬,远藤利明,胡庭兴. 不同水分条件下麻疯树幼苗的光合生理适应性研究[J]. 林业科学研究, 2010, 23(1): 108-113 |
| 作者姓名： | 刘永安 骆晓铭 魏建国 杨洪彬 远藤利明 胡庭兴 |
| 作者单位： | 1. 四川农业大学生态林业工程省级重点实验室,四川,雅安,625014;凉山州林科所,四川,西昌,615021 2. 凉山州林科所,四川,西昌,615021 3. 凉山州林业局,四川,西昌,615000 4. 日本森林综合研究所,茨城县,305-8687 5. 四川农业大学生态林业工程省级重点实验室,四川,雅安,625014 |
| 基金项目： | 中日技术合作四川省示范林营造项目(JICA);国家科技部"十一五"科技支撑计划(2007BAD50B01);四川省重点学科建设项目(SZD0419)资助 |
| 摘 要： | 通过研究干旱和复水对麻疯树幼苗叶片的相对含水量、气体交换特性和叶绿素荧光特性的影响,结果表明:随着基质含水量的减小,麻疯树叶片相对含水量、净光合速率、蒸腾速率、气孔导度持续下降,胞间CO2浓度先下降后上升;最大荧光产量、PSII最大光量子产量、光化学猝灭系数和PSⅡ实际量子效率均呈现下降趋势,初始荧光有小幅上升。复水后,气体交换参数和荧光参数能很快恢复,植株可以成活,表明麻疯树有很强的自我调节能力,对基质干旱有极强的适应能力。当基质含水量从21.91%下降到15.22%时,各参数均无显著差异(P＞0.05);当基质含水量从8.70%下降到6.83%时,各参数均有显著变化(P<0.05)。基质含水量为8.70%以上时,麻疯树碳同化能力降低的原因主要是气孔限制;基质含水量在8.70%以下时,光合效率的降低主要受非气孔限制。 |
| 关 键 词： | 麻疯树 干旱胁迫 复水 气体交换参数 叶绿素荧光 |
Photosynthetic Physiological Adaptation Mechanism of Jatropha curcas Seedling in Different Water Conditions |
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| LIU Yong-an,LUO Xiao-ming,WEI Jian-guo,YANG Hong-bin,Toshiaki Endo and HU Ting-xing. Photosynthetic Physiological Adaptation Mechanism of Jatropha curcas Seedling in Different Water Conditions[J]. Forest Research, 2010, 23(1): 108-113 | |
| Authors: | LIU Yong-an LUO Xiao-ming WEI Jian-guo YANG Hong-bin Toshiaki Endo HU Ting-xing |
| Affiliation: | Sichuan Provincial Key Laboratory of Ecological Forestry Engineering, Sichuan Agricultural University, Ya'an 625014, Sichuan,China;Forest Institute of Liangshan Prefecture, Xichang 615021, Sichuan,China;Forest Institute of Liangshan Prefecture, Xichang 615021, Sichuan,China;Forest Institute of Liangshan Prefecture, Xichang 615021, Sichuan,China;Forest Bureau of Liangshan Prefecture, Xichang 615000,Sichuan,China;Forestry and Products Research Institute, Tsukuba, Ibaraki, Japan 305-8687;Sichuan Provincial Key Laboratory of Ecological Forestry Engineering, Sichuan Agricultural University, Ya'an 625014, Sichuan,China;;Sichuan Provincial Key Laboratory of Ecological Forestry Engineering, Sichuan Agricultural University, Ya'an 625014, Sichua |
| Abstract: | Effects of drought and re-water on leaf relative water content(LRWC),gas exchange characteristics and chlorophyll fluorescence characteristics of Jatropha curcas seedlings in different water conditions were studied.The results are as following: with the decreasing of soil volumetric water content(SVWC),the leaf relative water content,photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs) of J.curcas declined gradually.Intercellular CO2 concentration(Ci) decreased at first,and then increased... |
| Keywords: | Jatropha curcas L drought stress re-water gas exchange parameters chlorophyll fluorescence |
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