生物技术通报 ›› 2016, Vol. 32 ›› Issue (3): 87-92.doi: 10.13560/j.cnki.biotech.bull.1985.2016.03.014

• 研究报告 • 上一篇    下一篇

辣椒乙烯转录因子CaERF18的分离与诱导表达

郑井元1,刘峰1,朱春晖2   

  1. 1.湖南省农业科学院蔬菜研究所, 长沙 410125;2.湖南省农业科学院植物保护研究所, 长沙 410125
  • 收稿日期:2015-06-12 出版日期:2016-03-24 发布日期:2016-03-25
  • 作者简介:郑井元, 男, 博士, 副研究员, 研究方向:蔬菜病害;E-mail:zhengjingyuan2004@163.com
  • 基金资助:
    国家自然科学基金项目(31201498), 湖南省农业科学院创新项目(2014YB09)

Isolation and Induced Expression of Ethylene Transcription Factor Gene CaERF18 from Capscium annuumm

ZHENG Jing-yuan1, LIU Feng1, ZHU Chun-hui2   

  1. 1. Institute of Vegetables, Hunan Academy of Agricultural Sciences, Changsha 410125;
    2. Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha 410125
  • Received:2015-06-12 Published:2016-03-24 Online:2016-03-25

摘要: 旨在明确辣椒(Capsicum annuum L. HDA149)与南方根结线虫(Meloidogyne incognita)不亲和互作过程中相关特异性ERF类型转录因子的候选基因及其表达模式。应用RT-PCR方法, 从南方根结线虫诱导的辣椒中分离到一个694 bp cDNA序列的乙烯(ERF)转录因子基因核心序列, 命名为CaERF18, 编码231个氨基酸, 含有一个保守的由59个氨基酸构成的ERF结构域, 与NtERF118SlERF4SlERF19 AP2结构域的相似性分别为44.3%、42.6% 和39.3%。表达分析表明, 南方根结线虫侵染可显著诱导CaERF18的表达, 接种线虫后12 h相对表达量开始升高, 12 h升高3.8倍, 72 h升高7.2倍。结果表明, CaERF18是一受病原物诱导表达的基因, 推测CaERF18在介导辣椒对根结线虫的抗性作用中可能具有重要的调控功能。

关键词: 辣椒, 根结线虫, 乙烯, 转录因子, 诱导表达

Abstract: To clarify the candidate genes and expression of one ERF transcription factor in pepper(Capsicum annuum L. HDA149)during the incompatible interaction between HDA149 and Meloidogyne incognita, the core sequence of an ethylene transcription factor gene CaERF18 was isolated from pepper induced by M. incognita with RT-PCR. The cDNA core sequence was 694 bp, encoding 231 amino residues containing a conserved ERF motif of 59 amino acids that shared 44.3%, 42.6% and 39.3% identities with the motif of NtERF118, SlERF4 and SlERF19, respectively. The expression analysis revealed that the expression of CaERF18 was significantly induced by M. incognita, the relative expression level of CaERF18 began to increase at 12 h with 3.8 times, and 7.2 times(peak)of the control at 72 h after inoculation with M. incognita. The expression of CaERF18 was strongly up-regulated by the nematode inoculation, which implied that the gene might play an important regulatory role in the resistant interaction of C. annuum to nematode.

Key words: pepper, root-knot nematode, ethylene, transcription factor, induced expression