| 水分胁迫下甘薯叶绿素a／b比值的变化及其与抗旱性的关系 |
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| 引用本文： | 张明生,谈锋.水分胁迫下甘薯叶绿素a／b比值的变化及其与抗旱性的关系[J].种子,2001(4):23-25. |
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| 作者姓名： | 张明生 谈锋 |
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| 作者单位： | 1. 贵州大学农学院,贵阳,550025
2. 西南师范大学生命科学学院,重庆,400715 |
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| 基金项目： | 国家"九五"科技攻关项目(编号96-002-02-17)资助. |
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| 摘 要： | 通过对室外旱池处理条件下的甘薯叶片叶绿素含量变化的研究,结果表明,水分胁迫下甘薯各品种叶片中叶绿素a、叶绿素b及总叶绿素含量比对照均有所下降,叶绿素a/b比值比对照也有所下降,且叶绿素a/b比值占对照百分率与品种抗旱性呈极显著负相关(r=-0.8509,P＜0.01).因此,可以用叶绿素a/b比值下降的程度来评定甘薯品种的抗旱性.
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| 关 键 词： | 甘薯 抗旱性 叶绿素含量 叶绿素a／b比值 水分胁迫 旱池人工模拟干旱 重量法 |
Relationship Between Ratio of Chlorophyll a and b Under Water Stress and Drought Resistance of Different Sweet Potato Varieties |
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| Zhang Mingsheng,Tan Feng.Relationship Between Ratio of Chlorophyll a and b Under Water Stress and Drought Resistance of Different Sweet Potato Varieties[J].Seed,2001(4):23-25. |
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| Authors: | Zhang Mingsheng Tan Feng |
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| Institution: | Zhang Mingsheng 1 Tan Feng 2 |
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| Abstract: | The changes of chlorophyll conent in the leaves of different sweet potato varieties under water stress were studied. The result showed that chlorophyll a, chlorophyll b and total chlorophyll content and ratio of chlorophyll a and b decreased to some extent. Meanwhile, under water stress conditions, ratio of chlorophyll a and b correlated negatively to drought resistance very significantly(r=-0.8509,P<0.01). Decreased extent of ratio of chlorophyll a and b can be used to evaluate drought resistance of different sweet potato varieties. |
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| Keywords: | Sweet potato Drought resistance Chlorophyll content Ratio of chlorophyll a and b |
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