| 干旱胁迫对毛竹幼苗生理特性的影响 |
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| 引用本文： | 应叶青,郭璟,魏建芬,姜琴,解楠楠.干旱胁迫对毛竹幼苗生理特性的影响[J].生态学杂志,2011,30(2). |
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| 作者姓名： | 应叶青 郭璟 魏建芬 姜琴 解楠楠 |
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| 作者单位： | 1. 北京林业大学林学院,北京100083;浙江农林大学亚热带森林培育国家重点实验室培育基地,浙江临安311300
2. 浙江农林大学亚热带森林培育国家重点实验室培育基地,浙江临安,311300 |
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| 基金项目： | 浙江省科技厅重点项目(2009C12089); 浙江省农业科技成果转化项目(2009D70101)资助 |
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| 摘 要： | 以1年生毛竹为试验材料,采用盆栽方式,设置对照(CK)、轻度(LS)、中度(MS)和重度干旱胁迫(HS)4个不同处理,研究不同水分条件下毛竹幼苗生理响应。结果表明:随着水分胁迫程度的加强,毛竹幼苗净光合速率(Pn)、蒸腾速率(Tr)显著下降(P<0.01),降幅分别达54.7%和49.7%,水分利用效率(WUE)在轻度胁迫条件下明显提高,但在中度和重度胁迫下又有一定程度下降;叶绿素a和叶绿素b含量显著下降(P<0.05和P<0.01),降幅分别为42.1%和28.2%,水分胁迫对叶绿素a/b(Chl-a/Chl-b)影响不显著;SOD活性、CAT活性和MDA含量显著上升(P<0.01、P<0.05和P<0.01);各生理指标间存在着相关性,经主成分分析,可将9个单项耐旱生理指标综合成为2个相互独立的综合指标,为评价毛竹苗期抗旱性提供参考。
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| 关 键 词： | 毛竹 干旱胁迫 光合速率 保护酶 叶绿素含量 |
Effects of drought stress on physiological characteristics of Phyllostachys edulis seedlings |
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| YING Ye-qing,GUO Jing,WEI Jian-fen,JIANG Qin,XIE Nan-nan.Effects of drought stress on physiological characteristics of Phyllostachys edulis seedlings[J].Chinese Journal of Ecology,2011,30(2). |
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| Authors: | YING Ye-qing GUO Jing WEI Jian-fen JIANG Qin XIE Nan-nan |
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| Institution: | YING Ye-qing1,2,GUO Jing2,WEI Jian-fen2,JIANG Qin2,XIE Nan-nan2 (1College of Forestory,Beijing Forestry University,Beijing 100083,China,2Nurturing Station for the State Key Laboratory of Subtropical Silviculture,Zhejiang Agriculture and Forestry University,Lin'an 311300,Zhejiang,China) |
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| Abstract: | A pot experiment was conducted to study the physiological responses of 1-year old Phyllostachys edulis seedlings to drought stress. Four treatments were installed,i.e.,control (CK),light (LS),medium (MS),and heavy (HS) drought stress. With increasing drought stress,the net photosynthetic rate (Pn) and transpiration rate (Tr) decreased significantly by 54.7% and 49.7%,respectively,WUE increased obviously under LS but decreased to some extent under MS and HS,Chl-a and Chl-b contents decreased significantly by... |
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| Keywords: | Phyllostachys edulis drought stress photosynthetic rate protective enzyme chlorophyll content |
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