| 毛桃对盐胁迫的光合、抗氧化和离子响应 |
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| 引用本文： | 吴强盛,刘琴.毛桃对盐胁迫的光合、抗氧化和离子响应[J].江西农业大学学报,2010,32(2). |
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| 作者姓名： | 吴强盛 刘琴 |
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| 作者单位： | 长江大学,园艺园林学院,湖北,荆州,434025 |
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| 基金项目： | 国家自然科学基金项目(30800747);;长江大学博士科研启动基金项目(39210264) |
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| 摘 要： | 在盆栽及温室条件下,对毛桃Prunus persica(L.)Batsch]实生苗进行不同浓度盐(NaCl)胁迫处理,测定其叶片的光合作用、抗氧化防御体系及无机离子浓度,探讨毛桃在盐胁迫下的一些生理生化响应。结果表明,在盐胁迫下毛桃叶片光合速率、气孔导度、水分利用率下降,而蒸腾速率上升。随着NaCl浓度的升高,毛桃叶片过氧化氢和超氧阴离子自由基浓度明显升高,膜脂过氧化产物丙二醛含量增加,表明叶片受到伤害。酶防御系统中SOD快速响应,在盐胁迫后迅速升高;非酶防御系统中可溶性蛋白和还原性抗坏血酸受到盐胁迫的抑制。100mmol/LNaCl处理对叶片还原型谷胱甘肽的含量没有影响,但200mmol/L的NaCl处理则显著促进了还原型谷胱甘肽的含量。在盐胁迫下,毛桃叶片Na+和Cl-浓度升高;K+、Mg2+、Ca2+受盐胁迫刺激后也升高;其他离子与Na+的比值在盐胁迫下减小。
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| 关 键 词： | 毛桃 盐胁迫 抗氧化 离子 |
Photosynthetic, Antioxidative and Ionic Responses of Prunus persica (L.) Batsch to Salt Stress |
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| WU Qiang-sheng,LIU Qin.Photosynthetic, Antioxidative and Ionic Responses of Prunus persica (L.) Batsch to Salt Stress[J].Acta Agriculturae Universitis Jiangxiensis,2010,32(2). |
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| Authors: | WU Qiang-sheng LIU Qin |
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| Institution: | College of Horticulture and Gardening/a>;Yangtze University/a>;Jingzhou 434025/a>;China |
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| Abstract: | The research was performed in a green house under potted conditions to evaluate the effects of salt stress on photosynthesis,antioxidant protective systems and inorganic ionic concentrations of Prunus persica (L.) Batsch seedlings,aiming for a better understanding of the physiological and biochemical responses to increasing salinity (NaCl).The results showed that photosynthetic rates,stomatal conductance,and water use efficiency in leaves were reduced by salt stress,but transpiration rates were increased.Hy... |
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