数字农科院2.0

柑橘转录因子基因CitMYB22的分离、表达及亚细胞定位分析

文献类型: 中文期刊

作者: 李永杰;马岩岩;谢让金;何绍兰;易时来;吕强;郑永强;王武;邓烈

作者机构:

关键词: 柑橘;R2R3-MYB;逆境;基因表达

期刊名称:园艺学报

ISSN: 0513-353X

年卷期: 2016 年 43 卷 06 期

页码: 1057-1068

收录情况: 北大核心 ; CSCD

摘要: 以‘资阳’香橙(Citrus junos‘Ziyang’)为材料,利用RT-PCR技术,分离到1个MYB基因,CitMYB22。比对分析发现,CitMYB22含有两个内含子,开放阅读框(ORF)为696 bp,可编码231个氨基酸残基的多肽。氨基酸聚类和结构分析表明,CitMYB22属于MYB类转录因子家族中的R2R3-MYB亚家族。进化树分析表明,CitMYB22与拟南芥参与逆境响应的R2R3-MYB亚家族成员At MYB15的同源性最高。克隆CitMYB22的ATG上游2 500 bp内启动子顺式元件,预测其含有多个与植物逆境和激素应答相关的顺式作用元件,如HSE、SARE和MBS等。亚细胞定位结果显示CitMYB22蛋白定位在细胞核中。实时定量结果表明,CitMYB22在叶、花中的表达量明显高于根和幼果,且在外源脱落酸、水杨酸、甲基茉莉酸、1–氨基环丙烷基羧酸以及高盐、脱水和4℃低温等非生物逆境胁迫下,均被诱导上调表达,推测CitMYB22可能与‘资阳’香橙的抗逆性相关。

分类号: S666

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