大气 CO2 浓度升高对水稻氮代谢影响的研究进展
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中国科学院创新方向项目(KZCX3-SW-440, KZCX2-SW-133)和国家自然科学基金面上项目(30470334, 40571157)资助。


Responses of nitrogen metabolism in rice plant to elevated atmospheric CO2 : A research review
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    摘要:

    自工业革命以来,大气中浓度不断升高的 CO2 对 C3 植物生长发育的影响十分显著。CO2 浓度升高条件下,植物光合作用增强,C 同化产物增多,C、N 代谢的平衡受到影响,植株 N 代谢发生变化。水稻(Oryza sativa L.)作为世界上最主要的食物来源之一,其 N 素营养状况的变化必然引起人类食物品质的改变,近年来已成为人们关注的焦点。本文结合气室条件的研究结果,从水稻 N 吸收和 N 积累量、N 浓度、N 代谢相关酶、不同形态的 N(主要是蛋白氮)、C/N 比、根系含 N 分泌物以及 N 与光合适应的关系等方面,重点收集和整理开放式空气中 CO2 浓度升高(FACE,Free Air Carbon-dioxide Enrichment)条件下水稻对 N 素的吸收、分配和利用等方面的研究进展,并对有待进一步深入的问题进行了探讨。

    Abstract:

    The increasing concentration of atmospheric CO2 has significant effects on the growth and development of C3 plants. Enhanced carbohydrate accumulation in plant tissues as the result of stimulated photosynthesis under elevated atmospheric CO2 affects carbon and nitrogen metabolism, and might alter the balance between them. Rice (Oryza sativa L.) is one of the most important food resources in the world and the changed nitrogen content of the rice grain affecting the quality of human nutrition has become a hot issue. Mainly based on the data from FACE (Free Air Carbon-dioxide Enrichment) experiments and some results from chamber-based trials, this paper reviewed the effects of the elevated atmospheric CO2 on the nitrogen uptake, allocation and assimilation including the nitrogen uptake and accumulation, nitrogen concentration, enzymes related to nitrogen metabolism, different nitrogen forms (mainly the protein-N ), the ratio of nitrogen/carbon, root exudates containing nitrogen and the relationship between nitrogen status and photosynthetic acclimation. The further research directions in this field were discussed as well.

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王 亮,朱建国,曾 青,谢祖彬,刘 钢.大气 CO2 浓度升高对水稻氮代谢影响的研究进展[J].土壤,2010,42(3):344-351. WANG Liang, ZHU Jian-guo, ZENG Qing, XIE Zu-bin, LIU Gang. Responses of nitrogen metabolism in rice plant to elevated atmospheric CO2 : A research review[J]. Soils,2010,42(3):344-351

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