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氯离子通道抑制剂对盐胁迫下野生和栽培大豆幼苗离子含量等生理指标的影响

DOI: 10.7685/j.issn.1000-2030.2008.02.004, PP. 17-21

Keywords: 野生大豆,栽培大豆,氯离子通道抑制剂,Zn2+,尼氟灭酸(NA)

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Abstract:

研究了氯离子通道抑制剂Zn2+、尼氟灭酸(niflumicacid,NA)对盐胁迫下野生大豆种群BB52(耐盐)和N23227(盐敏感)、栽培大豆品种Lee68(较耐盐)幼苗离子含量、膜透性、渗透势等生理指标的影响。结果表明与对照相比,150mmol.L-1NaCl处理6d后,供试3种材料的幼苗体内K+、叶片NO3-与叶绿素含量和渗透势均显著下降,Cl-含量、相对电解质渗漏率和MDA含量均显著上升。外加20μmol.L-1Zn2+处理后,与NaCl单独处理相比,K+、NO3-与叶绿素含量和渗透势均有明显提高,MDA和Cl-含量及相对电解质渗漏率明显下降。外加20μmol.L-1NA处理后,情况则相反。就所用大豆材料而言,这种效应在栽培大豆中更明显。可见,NaCl胁迫下Zn2+可在一定程度上缓解大豆幼苗的氯/盐害。

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