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Changes of plasma membrane ATPase activity,membrane potential and transmembrane proton gradient in Kandelia candel and A
Abstract： The salt-secreting mangrove, Avicennia marina, and non-salt-secreting mangrove, Kandelia candel were cultivated in sand with various salinities(0 ‰, 10 ‰, 20 ‰, 30 ‰, 40 ‰) for 60 d. Plasma membrane vesicles of high-purity in leaves and roots of A.marina and K. candel seedlings were obtained by two-phase partitioning. The function of the plasma membranes, the activity of ATPase, membrane potential and transmembrane proton gradient, at various salinities were investigated. The results showed that within a certain range of salinity(A. marina and roots of K. candel: 0-30‰;leaves of K.candel: 0-20‰), the activity of ATPase increased with increasing salinity, while high salinity(above 30‰ or 20‰) inhibited ATPase activity. In comparison with A. marina, K. candel appeared to be more sensitive to salinity. The dynamics of membrane potential and transmembrane proton gradient in leaves and roots of A. marina and K. candel seedlings were similar to that of ATPase. When treated directly by NaCl all the indexes were inhibited markedly: there was a little increase within 0-10‰(K. candel) or 0-20‰(A. marina) followed by sharp declining. It indicated that the structure and function of plasma membrane was damaged severely. 作 者： ZHAO Zhong-qiu ZHENG Hai-lei ZHU Yong-Guan 作者单位： ZHAO Zhong-qiu,ZHU Yong-Guan(Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)ZHENG Hai-lei(School of Life Sciences,Xiamen University,Xiamen 361005,China)
期 刊： 环境科学学报（英文版） ISTICSCI Journal： JOURNAL OF ENVIRONMENTAL SCIENCES 年，卷(期)： 2004, 16(5) 分类号： X173 Keywords： salinity A. marina K. candel plasma membrane H-ATPase Ca-ATPase membrane potential transmembrane proton gradient【Changes of plasma membrane ATPase ac】相关文章：
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