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- W2896571412 abstract "利用基因特异的PCR引物由毛白杨受干旱胁迫后构建的cDNA文库中扩增获得一PtDREB2A cDNA克隆, 并进行测序和序列分析, 结果表明:PtDREB2A cDNA片段总长为946 bp, 基因内部含有完整的开放阅读框架, 大小为864 bp, 可编码长度为287个氨基酸残基的蛋白质, 所推导的蛋白质氨基酸序列在AP2/ERF结构功能域与拟南芥AtDREB2A和水稻OsDREB2A蛋白的同源性分别为80.3%和83.3%。组织特异性Realtime-PCR结果显示, PtDREB2A在杨树根、茎、叶片和顶端分生组织中均有表达, 但其表达模式不同:PtDREB2A在叶片表达丰度最高, 在树干皮层及根部组织表达丰度中等, 而在顶端分生组织及主干韧皮部、形成层与木质部表达丰度最低。非生物胁迫及激素诱导差异表达显示, PtDREB2A不仅受高温、低温、干旱与盐诱导表达, 还受到激素IAA, NAA及GA3的上调表达, 但与ABA的诱导无关。组合利用MEGA4.0和DnaSP4.50.4软件对毛白杨45株基因型个体的PtDREB2A序列进行比对和分析, 共检测到49个单核苷酸多态性(SNP)位点, SNP频率为1/18 bp, 多样性指数π为0.010 48。在外显子区域, 共检测到46个SNP位点, 其中19个为同义突变, 27个为错义突变。" @default.
- W2896571412 created "2018-10-26" @default.
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- W2896571412 date "2011-04-25" @default.
- W2896571412 modified "2023-09-22" @default.
- W2896571412 title "毛白杨 PtDREB2A 基因的克隆、表达及单核苷酸多态性分析" @default.
- W2896571412 hasPublicationYear "2011" @default.
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