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园艺学报 ›› 2009, Vol. 36 ›› Issue (4): 539-544.

• 观赏植物 • 上一篇    下一篇

羽衣甘蓝花粉SCR13-b基因的分离及其功能分析

蓝兴国;杨 佳;李玉花*   

  1. (东北林业大学生命科学学院, 哈尔滨150040)
  • 收稿日期:2008-10-27 修回日期:2009-03-19 出版日期:2009-04-25 发布日期:2009-04-25
  • 通讯作者: 李玉花

Isolation and Functional Analysis of a S13-b-locus Cysteine-rich Gene of Ornamental Kale (Brassica oleracea var. acephala)

LAN Xing-guo, YANG Jia, and LI Yu-hua*   

  1. (College of L ife Sciences, N ortheast Forestry University, Harbin 150040, China)
  • Received:2008-10-27 Revised:2009-03-19 Online:2009-04-25 Published:2009-04-25
  • Contact: LI Yu-hua

摘要: 以羽衣甘蓝(Brassica oleracea var. acephala) S13-bS13-b自交不亲和系为试验材料, 分离了控制花粉自交不亲和基因———S13-b单倍型富含半胱氨酸基因(SCR13-b) , GenBank收录号为EF577028。SCR13-b cDNA序列含有237 bp的开放读码框(ORF) , 编码一个含78个氨基酸的蛋白。SCR13-b gDNA含有一个758 bp的内含子, 内含子5′供体位点和3′受体位点边界序列符合GU2AG规则; DNA blot分析表明SCR13-b在基因组中只有单一拷贝; 授粉生物活性分析试验显示原核表达SCR132b融合蛋白能够启动SI反应, 抑制杂交亲和花粉的萌发和生长。

关键词: 羽衣甘蓝, 自交不亲和, 原核表达

Abstract: The S13-b-locus cysteine-rich gene (SCR13-b) was isolated from pollen of ornamental kale (Brassica oleracea var. acephala) S132b homozygotes, GenBank accession number is EF577028. The SCR13-b cDNA sequence had an ORF of 237 bp, encoding a 782aa p rotein. The genomic SCR13-b sequence contained a 758 bp intron with boundary sequences of GT at 5′site and AG at 3′site, which comp lied with the typical‘GT-AG rule’in plants. Genomic DNA blot analysis showed that SCR13-b was a single copy gene in S13-b S13-b lines. Pollination bioassay showed that prokaryotic expressed recombinant SCR13-b can induce SI response and inhibit cross pollen germination and growth.

Key words: Brassica oleracea var. acephala, self-incompatibility, prokaryotic expression

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