| 渗透胁迫下稻苗中游离脯氨酸累积与膜脂过氧化的关系 |
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| 引用本文： | 肖用森,王正直,郭绍川.渗透胁迫下稻苗中游离脯氨酸累积与膜脂过氧化的关系[J].武汉植物学研究,1996,14(4):334-340. |
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| 作者姓名： | 肖用森 王正直 郭绍川 |
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| 作者单位： | 湘潭师范学院生物系 |
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| 摘 要： | 杂交稻幼苗经聚乙二醇（ＰＧＥ４０００）渗透胁迫（－０．９５ＭＰａ）处理，幼苗含水量及相对含水量下降，游离脯氨酸和膜脂过氧化产物丙二醛（ＭＤＡ）含量上升，质膜透性增大。随ＰＥＧ渗透胁迫时间延长，幼苗膜脂饱和脂肪酸含量逐渐增加，不饱和脂肪酸含量降低，不饱和脂肪酸指数（ＩＵＦＡ）减少。脯氨酸累积与ＭＤＡ增长及膜透性加大呈正相关性，与膜脂脂肪酸不饱和度呈负相关性。讨论了游离脯氨酸累积与细胞透性的相关性，以
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| 关 键 词： | 水稻幼苗 渗透胁迫 膜脂过氧化 游离脯氨酸 不饱和脂肪酸指数 |
| 收稿时间： | 1995-6-9 |
| 修稿时间： | 1996-1-18 |
THE RELATIONSHIPS BETWEEN FREE PROLINE AND MEMBRANE LIPID PEROXIDATION IN RICE SEEDLINGS UNDER OSMOTIC STRESS |
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| Xiao Yongsen,Wang Zhengzhi,Guo Shaochuan.THE RELATIONSHIPS BETWEEN FREE PROLINE AND MEMBRANE LIPID PEROXIDATION IN RICE SEEDLINGS UNDER OSMOTIC STRESS[J].Journal of Wuhan Botanical Research,1996,14(4):334-340. |
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| Authors: | Xiao Yongsen Wang Zhengzhi Guo Shaochuan |
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| Affiliation: | Department of Biology, Xiangtan Teacher's College Xiangtan 411201 |
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| Abstract: | Seedlings of hybrid rice(Oryza sativa subsp. indica cv, Weiyou 287 , Shanyou 287,Shanyou 63)were osmotic stress with polyethyleneglycol (PEG4000). The water content and relative water content of the rice seedlings were gradually decreased under osmotic stress(-0.95MPa), content of free proline and malondialdehyde(MDA)and permeability of plasma membrane increased sharply; however, there was a positive correlation of content of free proline with the level of membrane-lipid peroxidation. The response of the different hybrid rice combinations to osmotic stress was different. The index of unsaturated fatty acid ( IUFA)in membrane lipids decreased treated by PEG.There was a negative relation between IUFA and content of free proline under osmotic stress. |
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| Keywords: | Rice seedlings Osmotic stress Membrane-lipid peroxidation Free proline Index of unsaturated fatty acid(IUFA) |
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