中文核心期刊
CNKI期刊全文数据库
中国科学引文数据库(CSCD)源期刊
中国科技论文统计源期刊
万方数据知识服务平台
英国《科学文摘》(SA)
美国化学文摘(CA)
俄罗斯《文摘杂志》(AJ)
德国《天文学与天体物理学文摘》(AAA)
英国《中国天文学和天体物理学》(SCI收录)全文摘译期刊之一
《中国学术期刊文摘》
《中国物理文摘》
《中国天文学文摘》

• 微重力和空间生命科学 • Previous Articles     Next Articles

Altered Gravity Induced Ca2+ Signal in Plant Cells

Xiao Yuan1, 2, Wang Gaohong1, Liu Yongding1   

  1. (1.Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072; 2.Graduate School of the Chinese Academy of Sciences, Beijing 100049)
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-01-15 Published:2011-01-15
  • Contact: Liu Yongding

Abstract: Altered gravity (microgravity and hypergravity) could affect many aspects of plants, such as growth, development, metabolism, ultrastructure, gene and protein expression. Ca2+ might play a role as a signal molecular in such graviresponses of plant. We supposed that the consequence of events occurring in plant cells under altered gravity were in the following order: gravisensing---changes in the cytoplasmic membrane surface tension---alterations in the physicochemical properties of the membrane---changes in membrane permeability, ion transport, membrane-bound enzyme activity etc--- Ca2+ signaling---metabolism rearrangements---physiological responses. Under altered gravity, the intracellular Ca2+ balance was redistributed and the increased cytosolic Ca2+ concentration was the key step of transforming altered gravity stimulation into intracellular Ca2+ signal. Ca2+ influx into the cytosol was via activation of Ca2+ selective ion channels and inhibition of Ca2+-ATPases. Following the increased cytosolic Ca2+ concentration, altered gravity induced a series of biological effects by regulating enzyme activity, with involvement of regulatory Ca2+ messenger system. This paper summarized the influences of altered gravity on plant intracellular Ca2+ balance and discussed the possible pathways of Ca2+ influx/efflux and Ca2+ signaling in plant cell biochemical regulation to altered gravity.

CLC Number: