%0 Journal Article
%T Effects of Cu2+ stress on leaf physiological indice and ultrastructure of Potamogeton malaianus<br>铜胁迫对竹叶眼子菜叶片生理指标和超微结构的影响
%A JI Wang-dong
%A SHI Guo-xin
%A YANG Hai-yan
%A XU Qin-song
%A XU Ye
%A ZHANG Hui
%A <br>计汪栋
%A 施国新
%A 杨海燕
%A 徐勤松
%A 许晔
%A 张慧
%J 应用生态学报
%D 2007
%I 
%X With solution culture, this paper studied the toxic effects of different concentrations of Cu2+ (0, 2, 4, 6, and 8 mg x L(-1)) on the chlorophyll content, soluble protein content, protective enzyme activities, active oxygen generation, and ultrastructural changes in Potamogeton malaianus leaf. The results showed that with increasing concentration of Cu2+, the chlorophyll, carotenoid and soluble protein contents and uperoxide dismutase (SOD) and peroxidase (POD) activities decreased, catalase (CAT) activity increased first and decreased then, while O2-*, H2O2, MDA and soluble sugar content increased. SDS-PAGE revealed that Cu2+ induced the disappearance or the decrease of the expression amount of four polypeptides with apparent molecular weights of 60.9, 18.8, 15.7, 22.3 and 30.0 kDa. Transmission electron microscopy observation indicated that the higher Cu2+, concentration, the more serious damages the leaf organelles, especially chloroplast, mitochondria and nucleus, suffered. It was concluded that the death of P. malaianus plant under Cu2+ stress was resulted from the destruction of physiological function and structural foundation, and the disorder of physiological metabolism. The lethal concentration of Cu2+ could be 2-4 mg x L(-1).
%K Potamogeton malaianus
%K Cu2
%K stress
%K protective enzyme
%K ultrastructure<br>竹叶眼子菜
%K Cu2
%K 胁迫
%K 保护酶
%K 超微结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=397D03FA0B5E023E4359556FFD92FA59&yid=A732AF04DDA03BB3&vid=13553B2D12F347E8&iid=59906B3B2830C2C5&sid=24AB12C2044E792E&eid=E9F7EB943B2EE9C0&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=1&reference_num=31