苹果‘长富2号’开花调控转录因子基因MdIDD7的克隆及表达分析

被引:3
作者
齐思言
邢利博
张东
杜利莎
李有梅
樊胜
马娟娟
赵彩平
韩明玉
机构
[1] 西北农林科技大学园艺学院
关键词
苹果; 成花诱导; MdIDD7; 基因克隆; 表达分析;
D O I
10.16420/j.issn.0513-353x.2016-0655
中图分类号
S661.1 [苹果];
学科分类号
090201 ;
摘要
以‘长富2号’苹果为试验材料,采用RT-PCR的方法,从其芽中克隆得到INDETERMINATE DOMAIN(IDD)转录因子基因MdIDD7,其开放阅读框长度为1 626 bp,编码541个氨基酸。序列比对和结构域分析表明,该转录因子含有1个核定位信号和4个高度保守的锌指蛋白结构域。系统进化树分析表明,MdIDD7与白梨(Pyrus×bretschneideri,XP009364602.1)、桃(Prunus persica,XP007225628.1)和梅(Prunus mume,XP008220893.1)聚在一起。实时荧光定量PCR表明,MdIDD7在‘长富2号’不同组织(茎、叶、花、果和芽)中均有表达,其中芽的表达量最高。花后40~60 d,MdIDD7在易成花品种‘烟富6号’芽中表达量显著高于难成花品种‘长富2号’。"小年"树顶芽组织中MdIDD7的表达量显著高于"大年"树。在花芽诱导前期,外源GA处理诱导MdIDD7下调表达,而蔗糖处理诱导其上调表达,说明MdIDD7响应激素和糖信号,促进苹果成花。
引用
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页码:828 / 838
页数:11
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