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棉花学报  2012 

冠菌素对棉花幼苗盐害的缓解效应

DOI: 1002-7807(2012)06-0511-07, PP. 511-517

Keywords: 冠菌素,盐胁迫,棉花,幼苗,缓解效应

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Abstract:

以转基因抗虫棉(GossypiumhirsutumL.)中棉所45为材料,通过水培试验研究了冠菌素对盐胁迫下棉花萌发出苗和幼苗生长的影响。结果表明,盐胁迫严重抑制棉花种子萌发和幼苗生长,且对地上部的抑制程度大于对根系的抑制。盐胁迫对棉花萌发出苗和幼苗生长的抑制程度能被0.01μmol·L-1的冠菌素缓解。苗期盐胁迫21d内,冠菌素处理的棉花根、茎和叶的生物积累量较未施加冠菌素的盐处理增加1倍;活体组织化学原位检测结果显示,低浓度冠菌素处理降低盐胁迫诱导的主根H2O2含量。上述研究结果说明低浓度的冠菌素能提高棉花萌发出苗和苗期的耐盐性。

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