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植物研究 ›› 2019, Vol. 39 ›› Issue (4): 539-546.doi: 10.7525/j.issn.1673-5102.2019.04.008

• 研究报告 • 上一篇    下一篇

长白落叶松过氧化氢酶LoCAT1基因克隆及表达分析

白晓明, 董实伟, 杨宇宁, 宋跃, 张含国, 李淑娟   

  1. 林木遗传育种国家重点实验室, 东北林业大学, 哈尔滨 150040
  • 收稿日期:2019-01-22 出版日期:2019-07-05 发布日期:2019-07-03
  • 通讯作者: 李淑娟 E-mail:lishujuan@nefu.edu.cn
  • 作者简介:白晓明(1993-),男,硕士研究生,主要从事落叶松遗传育种方面的研究。
  • 基金资助:
    黑龙江省科学基金项目(C2017008);东北地区速生抗旱转基因落叶松新品系培育(2018ZX08020-003-001)

Cloning and Expression Analysis of Catalase Gene(LoCAT1) from Larix olgensis

BAI Xiao-Ming, DONG Shi-Wei, YANG Yu-Ning, SONG Yue, ZHANG Han-Guo, LI Shu-Juan   

  1. State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040
  • Received:2019-01-22 Online:2019-07-05 Published:2019-07-03
  • Supported by:
    Heilongjiang science fund project(C2017008);New strains of fast-growing drought-resistant transgenic larch were cultivated in northeast China(2018ZX08020-003-001)

摘要: 为了解长白落叶松过氧化氢酶(CAT)基因的相关信息,探究该基因在长白落叶松不同组织中及不同逆境胁迫下的表达特性,本研究根据长白落叶松转录组数据库中获得的CAT1基因全长序列设计引物,克隆得到长白落叶松CAT1基因,命名为LoCAT1。该基因完整的开放阅读框(ORF)长度为954 bp,共编码317个氨基酸。系统进化树分析结果显示,LoCAT1基因与北美云杉、银杏等CAT基因亲缘关系较近。利用实时定量RT-PCR技术分析了LoCAT1基因在长白落叶松中的组织表达特异性和应对非生物胁迫的表达模式。结果表明:LoCAT1基因在长白落叶松的根、茎、叶中均有表达,其中在茎部表达量最低,在叶中相对表达量最高。在非生物胁迫下,LoCAT1基因在长白落叶松根、茎、叶中的表达均发生了变化,但表达模式不同。在NaCl处理后,根和茎中LoCAT1基因均表现为下调表达,在12 h时表达量最低,而叶中LoCAT1基因表达在24 h明显受抑制,随后被上调表达,胁迫96 h时表达量最高。PEG6000处理后,根和茎中LoCAT1基因的表达在胁迫早期被明显抑制,随后被上调表达。而叶中LoCAT1基因的表达在所有时间点均表现为上调表达。本研究推测长白落叶松LoCAT1基因可能参与了植物响应逆境胁迫的应答。

关键词: 长白落叶松, LoCAT1, 克隆, 生物信息学分析, 表达分析

Abstract: In order to know about genes of Larix olgensis catalase and determine the expression characteristics in different organs of L. olgensis under different stresses, a CAT1 gene was cloned based on specific primers designed according to the CAT1 gene sequences from transcriptome database of L. olgensis, named LoCAT1. The complete length of open read frame(ORF) is 954 bp, encoding 317 amino acids. The results of phylogenetic tree analysis indicated that there was a closer relationship between LoCAT1 and Picea sitchensisand Ginkgo biloba. By real-time quantitative polymerase chain reaction (qPCR) analysis, LoCAT1 is highly expressed in leaf, while less expressed in stems. The expressions of LoCAT1 were obviously difference in roots and stems and leaves of L. olgensis under abiotic stress. The expression patterns of LoCAT1 were not exactly similarity among these treatments. The expression levels of LoCAT1 in roots and stems of L. olgensis after the treatment of NaCl were down-regulated, with the lowest expression at 12 h. While expression level in leaves was significantly inhibited at 24 h, and then up-regulated, with the highest expression at 96 h. The expression levels of LoCAT1 in roots and stems of L. olgensis after the treatment of PEG6000 were significantly inhibited in the early stage and then up-regulated. While LoCAT1 expression level in leaves was up-regulated. It was suggested that LoCAT1 may play an important role in response to stresses in plant.

Key words: Larix olgensis, LoCAT1, cloning, bioinformatics analysis, expression analysis

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