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园艺学报 ›› 2008, Vol. 35 ›› Issue (11): 1573-1580.

• 果树 • 上一篇    下一篇

桃成花基因PpLFY的克隆与表达及多克隆抗体制备

安丽君,李天红*
  

  1. (中国农业大学农学与生物技术学院,北京市果树逆境生理与分子生物学实验室,北京 100094)
  • 收稿日期:2008-07-01 修回日期:2008-09-01 出版日期:2008-11-25 发布日期:2008-11-25
  • 通讯作者: 李天红

Cloning, Expression and Production of Polyclonal Antibodies of Peach PpLFY

AN Li-jun and LI Tian-hong*

  

  1. (College of Agronomy and Biotechnology, China Agricultural University, Lab of Stress Physiology and Molecular Biology for Tree Fruits, A key Lab of Beijing Municipality, Beijing 100094, China)
  • Received:2008-07-01 Revised:2008-09-01 Online:2008-11-25 Published:2008-11-25
  • Contact: LI Tian-hong

摘要:

以‘八月脆’桃成花诱导期腋芽为试材,克隆得到一个FLORICAULA/LEAFY同源基因,命名为PpLEAFY(PpLFY),GenBank登录号为EF175869,该基因cDNA全长1 314 bp,ORF为1 248 bp,编码一个含416个氨基酸残基的蛋白,与其他物种中的LEAFY蛋白的同源性较高,为(74.22%~84.69%)。时期及组织特异性表达分析表明,PpLFY主要在叶片、花瓣及成花诱导期及花芽形态分化初期中表达。构建了pGEX-4T-1/PpLFY原核表达系统,获得了可溶性融合蛋白rPpLFY,分子量约为36 kD。利用该蛋白免疫新西兰大白兔,获得了抗rPpLFY的多克隆抗体,ELISA效价为1:10 000。

关键词: 桃, 成花基因, 克隆, 表达, 多克隆抗体

Abstract:

A FLO/LFY homologous gene named PpLEAFYPpLFY)was cloned from 'Bayuecui' peach [Prunus persica (L.) Batsch.] axillary bud sampled in the flower induction period. (GenBank accession No. EF175869). The sequence of complete PpLFY cDNA gene was 1 314 bp, with an ORF 1 248 bp encoding 416 amino acids, which shared highly homology between 74.22% to 84.69% with other FLO/LFY protein from other species in the database. RT-PCR analysis showed that PpLFY gene expressed mainly in the flower induction time and early period of morphology differentiation and also the leaf and petal of peach. The prokaryotic expression systems was constructed and induced. The recombinant protein was purified to immunize the rabbit. SDS-PAGE analysis showed that the rPpLFY molecular weight was about 36 kD, EILSA analysis showed that the titer of polyclonal antibody was about 1:10 000.

Key words: peach, flowering gene, cloning, expression, polyclonal antibody

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