Induction of cyclic electron flow around photosystem 1 and state transition are correlated with salt tolerance in soybean
Induction of cyclic electron flow around photosystem 1 and state transition are correlated with salt tolerance in soybean
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DOI：
10.1007/s11099-008-0003-2
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发表时间：
2008-03
期刊：
影响因子：
2.7
通讯作者：
K. Lu;Y. Yang;Y. He;D. Jiang
中科院分区：
文献类型：
--
作者：
K. Lu;Y. Yang;Y. He;D. Jiang
研究了两个耐盐性不同的大豆品种光系统1循环电子流（CEF 1）和状态转换（ST）的作用。在对照和NaCl（50 mM）胁迫下测定CEF 1和最大光化学效率（Fv/Fm），并在光和暗条件下分析NaCl诱导的捕光复合物2（LHC 2）体外磷酸化。NaCl处理对野生大豆Glycine lattoloba（cv. ACC 547）比栽培大豆Glycine max（cv. Melrose）。G组Fv/Fm降低较少。柳珊瑚NaCl胁迫10 d后最大。InG.光和暗条件下类囊体膜LHC 2磷酸化水平的增加与CEF 1的增加有关。然而，在G。NaCl处理降低了LHC 2的磷酸化水平。光合电子流抑制剂（DCMU，DBMIB）处理对LHC 2磷酸化的抑制作用更强。maxthan in G.托洛巴因此，NaCl诱导的CEF 1和ST的表达上调可能与G.托洛巴
We investigated the role of cyclic electron flow around photosystem 1 (CEF1) and state transition (ST) in two soybean cultivars that differed in salt tolerance. The CEF1 and maximum photochemical efficiency (Fv/Fm) were determined under control and NaCl (50 mM) stress and the NaCl-induced light-harvesting complex 2 (LHC2) phosphorylationin vitrowas analysed in light and dark. NaCl induced the increase of CEF1 more greatly in wild soybeanGlycine cyrtoloba(cv. ACC547) than in cultivated soybeanGlycine max(cv. Melrose). The Fv/Fmwas reduced less inG. cyrtolobathan inG. maxafter 10-d NaCl stress. InG. cyrtoloba, the increase of CEF1 was associated with enhancement of LHC2 phosphorylation in thylakoid membrane under both dark and light. However, inG. maxthe NaCl treatment decreased the LHC2 phosphorylation. Treatment with photosynthetic electron flow inhibitors (DCMU, DBMIB) inhibited LHC2 phosphorylation more inG. maxthan inG. cyrtoloba. Thus the NaCl-induced up-regulation in CEF1 and ST might contribute to salt resistance ofG. cyrtoloba.