脐橙CsNAC基因的克隆及其在果实贮藏过程中的表达分析

被引:6
作者
樊晶
李正国
高雪
杨迎伍
邓伟
机构
[1] 重庆大学生物工程学院基因工程研究中心,重庆市高校功能基因与调控新技术重点实验室
关键词
柑橘; 克隆; 表达; CsNAC;
D O I
10.16420/j.issn.0513-353x.2008.12.014
中图分类号
S666.4 [橙];
学科分类号
090201 ;
摘要
从脐橙(Citrussinensis Osbeck)果皮褐变相关基因的cDNA抑制差减文库中,筛选了一个与NAC基因家族同源的EST序列,通过RACE技术成功克隆了CsNAC基因全长cDNA序列共1203bp,并对其进行了序列分析。结果表明,CsNAC包含一个918bp的开放阅读框(ORF),编码305个氨基酸,预测的蛋白质分子量为35.2kD,等电点为6.72;CsNAC蛋白N端具有一个高度保守的NAC结构域;进化树分析表明CsNAC属于NAC蛋白家族的ATAF亚家族,可能参与胁迫反应。荧光定量PCR表达分析结果表明,CsNAC在果实贮藏过程中,随着果皮褐变的发生,与对照相比褐变果皮中的表达水平明显增强。说明CsNAC基因与脐橙果实的果皮褐变具有密切关系。
引用
收藏
页码:1803 / 1808
页数:6
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