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- W2322019945 abstract "土壤盐渍化是目前农业生产面临的主要问题之一, 同时种子萌发转绿作为植物幼苗形态建成的基础对盐胁迫最为敏感。本研究以Col-0、Ler野生型拟南芥和<i>osr1</i>短根突变体拟南芥为试验材料, 通过图位克隆方法得到调控根生长的<i>DAR2(DA1-Related Protein 2</i>)基因。本研究利用RT-PCR方法, 发现生长10 d的Col-0幼苗在200 mmol·L<sup>-1</sup>氯化钠条件下处理6 h和12 h, <i>DAR2</i>基因受盐胁迫诱导; 200 mmol·L<sup>-1</sup>氯化钠处理后, 组织化学染色结果显示, 萌发1 d的根尖韧皮部和3 d的叶片<i>pDAR2::GUS</i>的表达上升, 进一步表明<i>DAR2</i>基因受到盐胁迫的诱导。统计不同MS培养基[0(CK)、100 mmol·L<sup>-1</sup>氯化钠、150 mmol·L 1氯化钠、200 mmol·L<sup>-1</sup>氯化钠、150 mmol·L<sup>-1</sup>氯化钾、200 mmol·L<sup>-1</sup>甘露醇]上Col-0和dar2-3的萌发率和转绿率发现: 随着氯化钠浓度的逐渐增大, 突变体无论萌发还是转绿时间明显比野生型晚。在150 mmol·L<sup>-1</sup>氯化钾和200 mmol·L<sup>-1</sup>甘露醇培养条件下, 萌发和转绿的时间也比野生型要晚。这些结果表明突变体在萌发和转绿期对盐胁迫的敏感性比野生型明显增强, 进一步证明了突变体对盐胁迫的敏感性并不是对离子的特异响应。这些研究结果为深入了解逆境胁迫下植物早期生长发育的可塑性调控机制奠定了基础, 同时也为通过生物技术改良作物抗逆性提供了理论依据。" @default.
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- W2322019945 date "2014-06-25" @default.
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- W2322019945 title "Functional analysis of DA1-Related Protein 2 in Arabidopsis under salt stress" @default.
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- W2322019945 doi "https://doi.org/10.3724/sp.j.1011.2014.30396" @default.
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