| 干旱胁迫对红叶石楠叶片光合生理特性的影响 |
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| 引用本文： | 陈卫元,曹 晶,姜卫兵.干旱胁迫对红叶石楠叶片光合生理特性的影响[J].中国农学通报,2007,23(8):217-217. |
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| 作者姓名： | 陈卫元 曹 晶 姜卫兵 |
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| 作者单位： | 1. 扬州环境资源职业技术学院,扬州,225127
2. 南京农业大学园艺学院,南京,210095 |
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| 基金项目： | 江苏省省级综合性农业科技示范园项目;农业科技示范推广项目 |
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| 摘 要： | 对不同程度干旱胁迫下红叶石楠的叶片膜伤害和光合生理特性进行了研究。结果表明，随着干旱程度的增加，叶片含水量、光合色素含量以及净光合速率等生理指标都有不同程度的下降，而花青素含量、丙二醛含量和细胞膜透性大幅增加。在轻度干旱下，净光合速率、气孔导度和胞间CO2浓度同步下降，光合受抑的主要限制因子为气孔因素；中度、重度干旱胁迫下，净光合速率、气孔导度下降的同时，胞间CO2浓度上升，此时光合受抑的主要限制因子为非气孔因素
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| 关 键 词： | 宁夏固原 宁夏固原 土地利用方式 团聚体 微团聚体 |
| 修稿时间： | 2007-05-132007-06-12 |
Effects of Drought Stress on Photosynthetic Characteristics of Photinia frasery Dress |
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| Chen Weiyuan,Cao Jing,Jiang Wei-Bing.Effects of Drought Stress on Photosynthetic Characteristics of Photinia frasery Dress[J].Chinese Agricultural Science Bulletin,2007,23(8):217-217. |
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| Authors: | Chen Weiyuan Cao Jing Jiang Wei-Bing |
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| Institution: | 1.Yangzhou Vocational College of Environment and Resources,Yangzhou 225127; 2.College of Horticulture,Nanjing Agricultural University ,Nanjing 210095 |
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| Abstract: | Effects of drought stress on the membrane injury and photosynthetic characteristics in the leaves of Photinia frasery Dress were studied. The results showed the relative water content, chlorophyll and carotonoid contents and net photosynthetic rate (Pn) in leaves of Photinia frasery decreased with aggravation of drought stress, while the content of anthocyanin, Malondialdehyde and the membrane permeability inhanced significantly. Under light drought stress, Pn, stomatal conductance (Gs) and intercellular CO2 concentration (Ci) decreased at the same time, so the photosynthetic inhibition was due to stomatal limitation. Under moderate and severe drought stress, Ci increased with decrease of Pn and Gs,indicating the photosynthetic inhibition resulted from non-stomatal limatation. |
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| Keywords: | Photinia frasery Dress Drought stress Photosynthetic characteristics |
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