%0 Journal Article
%T Effects of NO3-stress and recovery on chlorophyll fluorescence parameters and ATPase activities of cucumber seedling leaves<br>NO3-胁迫及恢复对黄瓜幼苗叶片叶绿素荧光参数及ATPase活性的影响
%A YANG Fengjuan
%A WANG Xiufeng
%A WEI Min
%A SU Xiurong
%A YAN Tong
%A <br>杨凤娟
%A 王秀峰
%A 魏珉
%A 苏秀荣
%A 闫童
%J 应用生态学报
%D 2006
%I 
%X With water culture, this paper studied the effects of NO3- stress and recovery on the chlorophyll contents, chlorophyll fluorescence parameters, and ATPase activities of cucumber seedling leaves. The results showed that under stress for 7 days, the chlorophyll a, chlorophyll b, total chlorophyll and carotenoid contents, intrinsic fluorescence (Fo), and Mg-ATPase and Ca-ATPase activities were increased significantly when the NO3- concentration was high (168 mmol x L(-1)), while the intrinsic photochemical efficiency (Fv/Fm), potential activities (Fv/Fo) and quantum yield (phiPS II) of PSII were decreased with increasing NO3- concentration. After recovery for 7 days, the chlorophyll and carotenoid contents of all treatments with NO3- were lower than CK, while the intrinsic fluorescence, intrinsic photochemical efficiency and quantum yield of PS II were similar to CK when the NO3- concentration was < or = 84 mmol x L((-1), and the Fv/Fm and phiPS II were significantly lower than CK when the NO3-concentration was > 84 mmol x L(-1). The potential activity of PS II was similar to CK when the NO3- concentration was 42 and 126 mmol x L(-1), but significantly lower than CK in other treatments. The activities of Mg-ATPase and Ca-ATPase were decreased firstly but increased then when the NO3- concentration was > 84 mmol x L(-1).
%K ATPase<br>NO3-胁迫
%K 黄瓜
%K 叶绿素
%K 荧光参数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=54EFE58D2B207B68&yid=37904DC365DD7266&vid=BCA2697F357F2001&iid=38B194292C032A66&sid=1E9426A299DC9FFD&eid=8CCD0401CC9AE432&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=6&reference_num=24