| 摘要: |
| 本文以冬小麦品种渭麦4号为材料,综合研究了水分胁迫对其氮代谢的影响。结果表明,水分胁迫使小麦叶片硝酸还原酶活性显著降低,而蛋白酶、肽酶和核糖核酸酶活性却显著增强,致使蛋白质和RNA分解加剧,含量降低,并且总氮、游离氨基酸含量及其组分也发生了变化。DNA含量则不受土壤含水量高于萎蔫点的水分胁迫影响。 |
| 关键词: 水分胁迫,氮代谢,小麦 |
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| RELATIONSHIP BETWEEN WATER STRESS AND PLANT NITROGEN METABOLISM Ⅰ. EFFECTS OF WATER STRESS ON NITROGEN METABOLISM IN WHEAT LEAVES |
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Zhang Dianzhong Wang Peihong
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| Abstract: |
| Pot experi mentis were conducted with winter wheat cv. Wei mai 4 to study the effects of water stress on the nitrogen metabolism. Results . showed that water stress reduced the activity of nitrate reductase significantly, but increased that of proteinase, peptidase and RNase. As a result, the degradation of protein and RNA was enhanced, and their contents reduced. At the same time, the contents of total nitrogen and free amino acids and the composition of amino acids were changed. DNA content was unaffected when soil water content was above wilting point. |
| Key words: Water stress,nitrogen metabolism,wheat |
