| 外源亚精胺对辣椒幼苗干旱胁迫的缓解效应 |
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| 引用本文： | 逯明辉,王晓妮,巩振辉.外源亚精胺对辣椒幼苗干旱胁迫的缓解效应[J].辣椒杂志,2014(4):40-44. |
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| 作者姓名： | 逯明辉 王晓妮 巩振辉 |
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| 作者单位： | 西北农林科技大学园艺学院,陕西杨凌712100 |
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| 基金项目： | 陕西省农业攻关项目（2014K01-14-01） |
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| 摘 要： | 以小果形辣椒Criollo de Morelos 334(CM334)和大果形辣椒Early Calwonder(EC)为试材,研究了在不浇水干旱胁迫开始时和胁迫期间喷施外源亚精胺(Spd)对辣椒幼苗叶片耐旱相关生理指标的影响。结果表明:干旱胁迫条件下,辣椒叶片萎蔫指数(WI)、丙二醛(MDA)含量、相对电导率(REC)升高,而外源喷施Spd可以缓解这些生理指标的升高,且在胁迫初期喷施亚精胺会使缓解作用更加明显。EC幼苗叶片中这些生理指标均低于CM334,说明前者的耐旱性高于后者。干旱胁迫和外源喷施Spd均未对辣椒叶片的叶绿素含量产生影响。
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| 关 键 词： | 辣椒 干旱胁迫 亚精胺 |
Alleviation of Drought Stress on Hot Pepper Seedlings by Exogenous Spermidine |
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| Lu Minghui Wang Xiaoni Gong Zhenhui.Alleviation of Drought Stress on Hot Pepper Seedlings by Exogenous Spermidine[J].Journal of China Capsicum,2014(4):40-44. |
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| Authors: | Lu Minghui Wang Xiaoni Gong Zhenhui |
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| Institution: | Lu Minghui Wang Xiaoni Gong Zhenhui ( College of Horticulture, Northwest A＆F University, Yangling 712100, China |
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| Abstract: | The Criollo de Morelos 334 （CM334） and Early Calwonder （EC） respectively with small- and large- sized fruit were used as materials to test the effects of exogenous spermidine （Spd）, which was sprayed respectively at the start and in the course of the drought stress without water supplying, on the related physiological indexes of hot pepper seedling＇s drought tolerance in this study. The results showed that when exposured to drought stress, the pepper seedling leaves presented the increase in the wilt index, content of malondialdehyde （MDA） and relative electric conductivity （REC）, which could be alleviated by exogenous Spd. However, this alleviation was more effective when the Spd was sprayed at the beginning of drought stress. These physiological indexes in the leaves of EC seedlings were lower than in CM334 seedlings, which suggested that the drought tolerance of the former was higher than that of the latter. The chlorophyll （Chl） contents in the pepper leaves were not significantly changed by both of drought stress and exogenous Spd. |
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| Keywords: | hot pepper drought stress spermidine |
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