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耐盐杂草稻幼苗对NaCl胁迫响应及其生理基础

DOI: 10.7668/hbnxb.2010.04.027, PP. 123-129

Keywords: 杂草稻,幼苗,形态,生理,NaCl胁迫

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Abstract:

采用人工气候箱水培试验,研究了不同浓度NaCl处理对杂草稻幼苗生长、根系特性和渗透调节物质的影响.结果表明,随NaCl处理浓度的增加,3个试验材料苗高、地上部鲜质量、地上部干质量、地下部鲜质量和地下部干质量均降低,且降幅均为越光﹥长白9号﹥WR03-12.低NaCl胁迫下,WR03-12主根长有增加趋势.随NaCl浓度增加,3个材料根系总根长、根系体积、总表面积、吸收面积和活性吸收面积均呈下降趋势,下降幅度越光最大,长白9号居中,WR03-12最小.随NaCl浓度增加,3个材料游离氨基酸、可溶性糖含量均显著增加,增幅均为WR03-12﹥长白9号﹥越光,脯氨酸含量也随胁迫浓度增加而上升,增幅为越光﹥长白9号﹥WR03-12.

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