| 摘要: |
| 以抗旱性较强的稻种湘Ⅰ和较弱的763612为材料,作PEG6000渗透胁迫实验.结果表明,在-0.5MPa下处理3d.两个品种叶片质膜透性和MDA含量有所增加.Chl和Car含量有一定的下降,Chla/b和Chl/Car比值几乎不变.在-0.8MPa下两个品种的质膜透性和MDA含量大量增加,Chl和Car含量急剧下降,Chla/b和Chl/Car呈上升趋势;不同抗旱性的水稻品种之间表现出一定的差异.植物光合色素含量与膜脂过氧化水平呈一定的负相关性.乙烯释放量下降.但未见乙烷释放. |
| 关键词: 渗透胁迫,光合色素,膜脂过氧化,水稻 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目 |
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| Effect of Osmotic Stress on Photosynthctic Pigment and Level of Menbranc-Lipid Pcroxidation in Rice Seedlings |
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Jiang Mingyi'''' Jing Jiahai Wang Shaotang
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| Abstract: |
| Drought resistant paddy rice cullivar Xiang NO. 1 and drought sensitive upland rice cultivar 763612 were used in conducting PEG 6000 osmotic strcss.Thc experiment results showed that in the case of treatment under osmotic strcss(-0.5MPa),thc permeability of plasma mcmbrancc and malondialdchydc (MDA) contents of two cultivars incrcascd.whilc Chi. and Car contents of two cultivars decreased to a certain extent with the ratio between chl a/b and Chi / Car remained almost unchanged; and that in the case of treatment under osmotic stress (-0.8MPa),thc permeability of plasma mcmbrancc and malondialdchydc (MDA) contents of two cultivars increased greatly, while Chl. and Car ccntcnts of two cultivars dropped drastically. The ratio between Chl a/bb and Chl / Car tends to rise/There also appeared to have sonic certain difference anong rice cultivars with different drought rcsistancc.Undcr osmotic strcss.thcrc seemed to have a certain negative correlation between the content of phytosynthctic pigment in plant and level of mcmbranc-lipid pcroxidation.but ethane was not released in the experiment. |
| Key words: osmotic stress, photosynthctic pigment, membrane-lipid pcroxidation, rice |
