| 渗透胁迫对小麦幼苗硝酸还原酶活性的影响 |
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| 引用本文： | 张晓平,王邦锡,石兰馨,黄久常.渗透胁迫对小麦幼苗硝酸还原酶活性的影响[J].甘肃科学学报,1993(4). |
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| 作者姓名： | 张晓平 王邦锡 石兰馨 黄久常 |
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| 作者单位： | 兰州大学植物生理研究室，兰州大学植物生理研究室，兰州大学植物生理研究室，兰州大学植物生理研究室 兰州 730000，兰州 730000，兰州 730000，兰州 730000 |
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| 摘 要： | 本文研究了小麦幼苗根部和离体叶切段遭受PEG(MW=6000)渗透胁迫后叶内硝酸还原酶(NR)活性的变化,发现渗透胁迫不仅降低叶片中已有的NR活性,还抑制底物NO_3~-对NR的诱导过程。进一步研究表明,幼苗NR的诱导受抑与渗透胁迫下叶内诱导物不足有关。
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| 关 键 词： | 硝酸还原酶 渗透胁迫 小麦幼苗 |
EFFECTS OF OSMOTIC STRESS ON NITRATE REDUCTASE IN WHEAT SEEDLINGS |
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| Zhang Xiaoping,Wang Bangxi,Shi Lanxin,Huang Jiuchang.EFFECTS OF OSMOTIC STRESS ON NITRATE REDUCTASE IN WHEAT SEEDLINGS[J].Journal of Gansu Sciences,1993(4). |
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| Authors: | Zhang Xiaoping Wang Bangxi Shi Lanxin Huang Jiuchang |
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| Abstract: | The nitrate reductase (NR) activity in leaf of wheat seedlings was assayed in this paper when roots or leat sections were subjected to osmotic stress induced by PEG (MW = 6000). The results showed that osmotic stress not only lessened the NR activity presented in leaf before the stress was applied, but also inhibited the induction of NR by NO3-. Further study demonstrated that the inhibition of NR induction in seedlings was related to the substrate shortage in the leaf due to the decrease in NO3- uptake and translocation of the roots. |
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| Keywords: | Nitrate reductase (NR) osmotic stress wheat seedlings |
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