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植物钾效率及其评价的研究进展与展望
王 利,陈 防,万开元
中国科学院武汉植物园
摘要:
植物对K素的吸收和利用是一个复杂的过程。近年来,科学工作者在植物K素高效机理方面做了大量研究工作,有关K素效率及其评价的研究取得了长足的进展。本文简要综述了植物K素效率的概念、K素吸收效率的差异及其生理机制,讨论了土壤K库、根系特征、根系分泌物和根际微生物、K素在植株和细胞水平的分配和再分配、其他离子对K离子的替代作用、收获指数、研究当中常用的K素效率的评价方法及存在的一些问题,并介绍了分子生物学领域的最新相关研究成果。
关键词:  钾素  土壤  吸收效率  利用效率  生理机制
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基金项目:中国科学院知识创新工程重要方向项目(KSCX2-YW-N-002)资助
Progress and expectation of the research on plant K efficiency and its evaluation
WANG Li, CHEN Fang, WAN Kai-yuan
Wuhan Botanical Garden, Chinese Academy of Sciences
Abstract:
The process of potassium uptake and utilization in plants is very complex. Recently, much work has been done on the research of mechanism of plant high K use efficiency and great positive results on plant K efficiency and its evaluation have obtained. This paper briefly summarized the concepts, differences and physiological mechanism of plant K use efficiency. The research reports on soil potassium sink, root characteristics, root exudates and microorganism, potassium translocation and relocation at both cellular and plant levels, substitution of other ions to K+, harvest index and some relative new results in the field of molecule biology has also been reviewed. Additionally some indices of K use efficiency and some related problems in using the indices are discussed as well.
Key words:  Potassium, Soil, Uptake efficiency, Use efficiency, Physiologic mechanism

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