| 干旱胁迫对两种油桐幼苗生长、气体交换及叶绿素荧光参数的影响 |
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| 引用本文： | 李泽,谭晓风,卢锟,张琳,龙洪旭,吕佳斌,林青.干旱胁迫对两种油桐幼苗生长、气体交换及叶绿素荧光参数的影响[J].生态学报,2017,37(5):1515-1524. |
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| 作者姓名： | 李泽 谭晓风 卢锟 张琳 龙洪旭 吕佳斌 林青 |
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| 作者单位： | 中南林业科技大学, 经济林培育与保护省部共建教育部重点实验室, 经济林培育与利用湖南省协同创新中心, 长沙 410004,中南林业科技大学, 经济林培育与保护省部共建教育部重点实验室, 经济林培育与利用湖南省协同创新中心, 长沙 410004,中南林业科技大学, 经济林培育与保护省部共建教育部重点实验室, 经济林培育与利用湖南省协同创新中心, 长沙 410004,中南林业科技大学, 经济林培育与保护省部共建教育部重点实验室, 经济林培育与利用湖南省协同创新中心, 长沙 410004,中南林业科技大学, 经济林培育与保护省部共建教育部重点实验室, 经济林培育与利用湖南省协同创新中心, 长沙 410004,中南林业科技大学, 经济林培育与保护省部共建教育部重点实验室, 经济林培育与利用湖南省协同创新中心, 长沙 410004,中南林业科技大学, 经济林培育与保护省部共建教育部重点实验室, 经济林培育与利用湖南省协同创新中心, 长沙 410004 |
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| 基金项目： | 国家林业公益性行业科研重大专项（201204403）；湖南省研究生科研创新项目（CX2015B286）；中南林业科技大学研究生科技创新基金资助项目（CX2015A01） |
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| 摘 要： | 为了探究干旱胁迫对两种油桐(三年桐和千年桐)幼苗光合生理特性的变化及响应,采用盆栽试验,研究不同水分处理(正常供水、轻度干旱、中度干旱、重度干旱)对油桐幼苗生长、叶片气体交换及叶绿素荧光参数的影响。结果表明:与对照相比,轻度干旱胁迫对两种油桐生长、气体交换及叶绿素荧光参数无明显影响(P0.05);中度干旱及重度干旱使两种油桐的叶绿素SPAD值、生长量、净光合速率(P_n)、气孔导度(G_s)、蒸腾速率(T_r)、气孔限制值(L_s)、最大净光合速率(P_(nmax))、光饱和点(LSP)、表观量子效率(AQY)、暗呼吸速率(R_d)、最大光化学效率(F_v/F_m)、实际光化学量子效率(Φ_(PSⅡ))、电子传递速率(ETR)及光化学猝灭系数(q_P)显著下降(P0.05),且在重度干旱胁迫下迅速下降,胞间CO_2浓度(C_i)、水分利用效率(WUE)、光补偿点(LCP)、初始荧光(F_o)、非光化学猝灭系数(NPQ)显著升高(P0.05);中度干旱胁迫下油桐幼苗P_n的降低是由气孔因素及光合机构活性降低的非气孔因素共同引起的,而重度干旱胁迫下光合作用的下降主要是由光合机构活性降低的非气孔因素引起的。三年桐的光合机构活性及光合效率高于千年桐,对干旱胁迫的适应性较千年桐强。
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| 关 键 词： | 三年桐 千年桐 干旱胁迫 光合特性 光饱和点 叶绿素荧光 |
| 收稿时间： | 2015/9/20 0:00:00 |
| 修稿时间： | 2016/5/31 0:00:00 |
Influence of drought stress on the growth, leaf gas exchange, and chlorophyll fluorescence in two varieties of tung tree seedlings |
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| LI Ze,TAN Xiaofeng,LU Kun,ZHANG Lin,LONG Hongxu,L&#; Jiabin and LIN Qing.Influence of drought stress on the growth, leaf gas exchange, and chlorophyll fluorescence in two varieties of tung tree seedlings[J].Acta Ecologica Sinica,2017,37(5):1515-1524. |
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| Authors: | LI Ze TAN Xiaofeng LU Kun ZHANG Lin LONG Hongxu L&#; Jiabin and LIN Qing |
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| Institution: | Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Cooperative Innovation Center of Cultivation and Utilization for Non-Wood Forest Trees of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China,Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Cooperative Innovation Center of Cultivation and Utilization for Non-Wood Forest Trees of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China,Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Cooperative Innovation Center of Cultivation and Utilization for Non-Wood Forest Trees of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China,Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Cooperative Innovation Center of Cultivation and Utilization for Non-Wood Forest Trees of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China,Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Cooperative Innovation Center of Cultivation and Utilization for Non-Wood Forest Trees of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China,Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Cooperative Innovation Center of Cultivation and Utilization for Non-Wood Forest Trees of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China and Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Cooperative Innovation Center of Cultivation and Utilization for Non-Wood Forest Trees of Hunan Province, Central South University of Forestry and Technology, Changsha 410004, China |
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| Abstract: | |
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| Keywords: | Vernicia fordii Vernicia montana drought stress photosynthetic characteristics light saturation point chlorophyll fluorescence |
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