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OALib Journal期刊
ISSN: 2333-9721
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铬胁迫下不同品种小麦萌发和内源激素的变化
DOI: 10.3724/SP.J.1145.2009.00602, PP. 602-605
Keywords: 小麦,品种,铬胁迫,萌发,内源激素,抗性
Abstract:
采用k2(cro4)3溶液，设5个浓度，对3种不同抗性的小麦品种（新麦19、矮抗58和豫麦18）进行萌发期胁迫处理，研究了幼苗的发芽势、发芽率、根长、芽长及内源激素含量的变化.结果表明：（1）随着铬浓度的增加，发芽势、发芽率和芽长均基本呈“先升后降”趋势；（2）同一浓度铬处理下，发芽率、发芽势和芽长从大到小的顺序依次为：新麦19、矮抗58、豫麦18，根长从大到小的顺序为：豫麦18、新麦19、矮抗58；（3）150mgl-1的铬胁迫下，iaa与aba在小麦幼苗、幼根中含量降低，在籽粒中含量升高，其中新麦19籽粒和根芽中aba含量均高于其他品种的；（4）不同浓度铬胁迫下，iaa/aba值在新麦19中最低，变化幅度最小，新麦19表现出较强的抵抗铬胁迫能力.图3表1参20
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