| 硝酸还原酶活力与作物耐肥性的研究 Ⅱ、籼、粳稻对硝态氮的吸收和同化 |
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| 引用本文： | 林振武,郑朝峰,吴少伯,王玉琴,汤玉玮.硝酸还原酶活力与作物耐肥性的研究 Ⅱ、籼、粳稻对硝态氮的吸收和同化[J].作物学报,1986,0(1):9-14. |
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| 作者姓名： | 林振武 郑朝峰 吴少伯 王玉琴 汤玉玮 |
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| 作者单位： | 中国科学院上海植物生理研究所 |
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| 摘 要： | 本文以籼(原丰早)、粳(京引127)稻为材料,研究了它们对 NO3的吸收和同化 NO3为氨基酸过程中有关酶的活力。结果指出:1)籼稻幼苗根对外液NO3的吸收能力高于粳稻;2)籼稻叶片把 NO3-同化为 NH4+的硝酸还原酶(NR)和亚硝酸还原酶(NiR)活力都高于粳稻;3)在进一步同化 NH4+(无机态氮)为氨基酸(有机态氮)的谷氨酸脱氢酶(GDH)和谷氨酰胺合成酶(GS)/谷氨酸合酶(GOGAT)两条途径中,籼稻叶片的 GDH、GS 和 GOG-AT 活力都高于粳稻。这些结果说明了耐肥性弱的籼稻对 NO3的吸收同化能力高于耐肥性强的粳稻,也就是说籼稻比粳稻对氮肥的反应更敏感。籼、粳稻的这种差异可能也存在于其他不同耐肥性的作物品种间。这就以作物内在的氮素代谢基础说明了作物品种对氮肥反应的差异原因,即作物耐肥性的生理基础。还应指出在作物对 NO3吸收同化的诸因素中硝酸还原酶起着主要的和关键的作用。
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| 收稿时间： | 1984-03-22 |
STUDIES ON NITRATE REDUCTASE ACTIVITY AND NITROGEN RESPONSE IN CROP PLANTS Ⅱ.THE UPTAKE AND ASSIMILATION OF NITRATE IN INDICA AND JAPONICA RICE |
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| Lin Zhenwu,Zheng Chaofeng,Wu Shaobo,Wang Yuqin,Tang Yuwei.STUDIES ON NITRATE REDUCTASE ACTIVITY AND NITROGEN RESPONSE IN CROP PLANTS Ⅱ.THE UPTAKE AND ASSIMILATION OF NITRATE IN INDICA AND JAPONICA RICE[J].Acta Agronomica Sinica,1986,0(1):9-14. |
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| Authors: | Lin Zhenwu Zheng Chaofeng Wu Shaobo Wang Yuqin Tang Yuwei |
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| Institution: | Shanghai Institute of Plant Physiology; Academia Sinica |
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| Abstract: | The ability of uptake and assimilation of nitrate in Indica and Japo-nica rice(Oryza sativa L.)have been compared.The results showedthat:1).The rate of nitrateuptake by root in Indica rice was higher than that in Japonica rice.2).The activities of nitrate reductase and nitrite reductase,which catalyzethe reduction of NO3- to NH4+,were higher in Indica rice than in Japo-nica rice.3).In the two pathways of the incorporation of ammoniainto amino acid:glutamate dehydrogenase and glutamine synthetase/glu-tam... |
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