| 盐胁迫对甘薯叶片氮代谢的影响 |
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| 引用本文： | 刘伟,潘廷国,柯玉琴.盐胁迫对甘薯叶片氮代谢的影响[J].福建农林大学学报(自然科学版),1998(4). |
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| 作者姓名： | 刘伟 潘廷国 柯玉琴 |
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| 作者单位： | 福建农业大学科研处，福建农业大学基础部 |
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| 摘 要： | 以胜利百号、栗子香、徐薯１８等３个甘薯品种为材料，对盐胁迫下甘薯氮代谢进行了研究．结果显示，盐胁迫下甘薯叶片总氮含量下降，游离氨基酸迅速累积，叶绿素含量下降，ＲＮＡ及ＤＮＡ降解、ＲＮＡ／ＤＮＡ值下降，游离脯氨酸迅速累积，硝酸还原酶活力下降且伴随着其底物（ＮＯ３－）累积和产物（ＮＯ２－）下降．说明盐胁迫下甘薯氮代谢系统失调是造成其植株失绿变黄，并最终导致其减产的主要原因之一．
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| 关 键 词： | 甘薯 盐胁迫 氮代谢 |
Effect of salt stress on nitrogen metabolism in the leaves of sweet potato |
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| Liu Wei,Pan Tingguo,Ke Yuqing.Effect of salt stress on nitrogen metabolism in the leaves of sweet potato[J].Journal of Fujian Agricultural and Forestry University,1998(4). |
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| Authors: | Liu Wei Pan Tingguo Ke Yuqing |
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| Institution: | Liu Wei 1 Pan Tingguo 2 Ke Yuqing 2 |
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| Abstract: | Three sweet potato cultivars, Shenglibaihao, Xushu 18 and Lizixiang, were used as materials to study nitrogen metabolism under salt stress. The results showed that in the leaves the total nitrogen content, chlorophyll content and RNA/DNA ratio decreased, free amino acids including proline accumulated rapidly, RNA and DNA degraded. Nitrate reductase activity declined with the accumulation of its substrate NO 3 - and the decrease of its product NO 2 - . Therefore, under salt stress, the disorder of nitrogen metabolism in sweet potato mainly caused yellowing of its plants and finally the yield decrease. |
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| Keywords: | sweet potato salt stress nitrogen metabolism |
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