马铃薯野生种CHS基因cDNA的克隆与表达分析

被引:10
作者
卢其能 [1 ,2 ]
杨清 [3 ]
却志群 [1 ]
黄友明 [1 ]
机构
[1] 宜春学院生命科学与资源环境学院
[2] 南京农业大学生命科学学院,生化与分子生物学系
[3] 南京农业大学生命科学学院生化与分子生物学系
关键词
查尔酮合酶; 花色苷; cDNA克隆; 表达谱; 马铃薯野生种;
D O I
暂无
中图分类号
S532 [马铃薯(土豆)];
学科分类号
0901 ;
摘要
设计简并引物,用RT-PCR法从马铃薯野生种(Solanum pinnatisectum)克隆到了CHS(Chalcone synthase,查尔酮合酶)基因的全长cDNA,并用半定量RT-PCR法进行了表达分析。序列分析表明,CHS基因编码一个389个氨基酸残基的多肽,在氨基酸水平上与其他茄科植物的同源性达到89%93%,多重比较和系统发育分析均表明该基因为CHS家族中的一个新成员;检测了CHS基因的空间表达模式,该基因在花和匍匐茎中表达量最高,在根和块茎中没有检测到,这与花和匍匐茎呈淡紫色有花色苷合成,而根和块茎呈白色无花色苷合成是相一致的;发现在块茎中CHS受光诱导表达,光照后的第3天表达量最高,而在光照前检测不到,光照前块茎为白色,随着光照时间的延长,其表层颜色因积累花色苷而变成紫红色。
引用
收藏
页码:17 / 22
页数:6
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