| 抗旱性不同的甘薯品种对渗透胁迫的生理响应 |
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| 引用本文： | 陈京.抗旱性不同的甘薯品种对渗透胁迫的生理响应[J].作物学报,1999,25(2):232-236. |
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| 作者姓名： | 陈京 |
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| 作者单位： | 西南师范大学生命科学系，重庆北暗，400715 |
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| 基金项目： | 重庆市中青年科技专家基金资助项目 |
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| 摘 要： | 用不同浓度的PEG对甘薯进行根际渗透胁迫处理，测定结果表明，质膜透性增大，MDA、总氨基酸和游离脯氨酸含量增加，CAT活性升高，POD活性下降，抗旱性不同的品种间的变化趋势相似，但变化幅度存在明显差异。SOD活性表现出品种抗旱适应特性。在相同的渗透胁迫条件下，抗旱性较强的渝薯20能维持较高的光合磷酸化活力。
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| 关 键 词： | 甘薯 PEG 渗透胁迫 抗早性 ATP 酶活性 |
| 收稿时间： | 1998-02-14 |
| 修稿时间： | 1998-09-01 |
Physiological Response for Different Drought Resistance of Sweet Pota-to under Osmotic stress |
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| Chen Jing.Physiological Response for Different Drought Resistance of Sweet Pota-to under Osmotic stress[J].Acta Agronomica Sinica,1999,25(2):232-236. |
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| Authors: | Chen Jing |
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| Institution: | Dept. of Life Science, Southwest China Normal University, Chongqing, 400715 |
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| Abstract: | With different concentration of polyethylene glycol(PEG) the treatment of osmotic stress rhizosphere of sweet potato has been made. The test showed that plasmolemma permeability enhanced; malondialdehyde, total amino acid and free proline content increased; catalase activity increased and peroxidase activity decreased. The change tendency of different drought resistances among varieties were similar, but the range of changes was different remarkably. Su-peroxide dismutase activity showed special characteristic of drought resistance of varieties. The strong drought resistant "Yushu 20" can maintain higher activity of photophosphorylation in same osmotic stress conditions. |
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| Keywords: | Sweet potato Polyethylene glycol Osmotic stress Drought resistance Adeno-sine triphosphate Enzyme activity |
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