%0 Journal Article
%T Changes of plasma membrane ATPase activity,membrane potential and transmembrane proton gradient in Kandelia candel and Avicennia marina seedlings with various salinities<br>Changes of plasma membrane ATPase activity, membrane potential and transmembrane proton gradient in Kandelia candel and Avicennia marina seedlings with various salinities
%A ZHAO Zhong-qiu
%A ZHENG Hai-lei
%A ZHU Yong-guan
%A <br>ZHAO Zhong-qiu
%A ZHENG Hai-lei
%A ZHU Yong-guan
%J 环境科学学报(英文版)
%D 2004
%I 
%X The salt-secreting mangrove, Avicennia marina, and non-salt-secreting mangrove, Kande/ia candel were cultivated in sand with various salinities(0‰, 100‰, 20‰, 30‰, 40‰) for 60 d. Plasma membrane vesicles of highpurity 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.
%K salinity
%K A
%K marina
%K K
%K candel
%K plasma membrane
%K H-ATPase
%K Ca-ATPase
%K membrane potential
%K transmembrane proton gradient<br>质膜
%K ATP酶
%K 活性
%K 树苗
%K 盐度
%K 环境保护
%K 植物
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=4A6AD548B1E210DF0ACD7ADAF5C20119&yid=D0E58B75BFD8E51C&vid=7801E6FC5AE9020C&iid=94C357A881DFC066&sid=81D76BB45305F8B7&eid=04EA291949415E08&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=1&reference_num=25