| 棉花子叶衰老过程中氮素的再利用 |
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| 引用本文： | 刘娟,邬云海,刘玉栋,刘怀华,沈法富.棉花子叶衰老过程中氮素的再利用[J].棉花学报,2008,20(4):318-320. |
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| 作者姓名： | 刘娟 邬云海 刘玉栋 刘怀华 沈法富 |
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| 作者单位： | 作物生物学国家重点实验室，山东农业大学农学院，山东 泰安 271018 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)
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国家重点基础研究发展计划(973计划)
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国家农业公益性行业研究专项 |
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| 摘 要： | 以陆地棉早熟品种中棉所58和中熟品种邯郸109为材料，研究子叶衰老过程中氮素的再利用率（NRE）及氮代谢相关指标的变化。结果表明：子叶衰老过程中，单位面积总N含量（NPA）逐渐降低，中棉所58 NRE为69.26%，邯郸109为54.45%；叶绿素、可溶性蛋白质含量和硝酸还原酶（NR）活性先上升后降低，NR最先降低，中棉所58和邯郸109分别在9 d、14 d开始下降；中棉所58各指标比邯郸109早下降4～8 d。谷氨酸脱氢酶（GDH）活性先下降后上升，表明GDH可能是氮素再利用的关键酶。
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| 关 键 词： | 棉花 子叶衰老 氮素再利用 |
| 收稿时间： | 2007-10-12; |
Nitrogen Resorption during Cotton Cotyledon Senescence |
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| LIU Juan,WU Yun-hai,LIU Yu-dong,LIU Huai-hua,SHEN Fa-fu.Nitrogen Resorption during Cotton Cotyledon Senescence[J].Cotton Science,2008,20(4):318-320. |
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| Authors: | LIU Juan WU Yun-hai LIU Yu-dong LIU Huai-hua SHEN Fa-fu |
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| Institution: | State Key Laboratory of Crop Biology; College of Agronomy, Shandong Agricultural University, Tai'an, Shandong 271018, China |
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| Abstract: | Nitrogen (N) resorption efficiency (NRE) and changes in nitrogen metabolism indices in cotton cotyledons during leaf senescence were studied in two cotton cultivars: CCRI 58 (short season) and Handan 109 (medium season). The main results were as follows: during the process of leaf growth and senescence, total nitrogen content in unit area (NPA) decreased gradually, NRE in CCRI 58 and Handan 109 is separately 69.26% and 54.45%, N metabolism indices such as chlorophyll and soluble protein content and nitrate reductase (NR) activity, are all increased first, then declined. The first to show a decline was NR activity, 9 d and 14 d in CCRI 58 and Handan 109. The declined times in CCRI 58 are 4~8 days prior to Han 109. Glutamate dehydrogenase (GDH) activity first declined, then increased, indicting that GDH may be the key enzyme involved in N resorption. |
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| Keywords: | cotyledon senescence nitrogen resorption |
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