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植物研究 ›› 2022, Vol. 42 ›› Issue (2): 211-223.doi: 10.7525/j.issn.1673-5102.2022.02.006

• 分子生物学 • 上一篇    下一篇

山新杨LTP家族基因生物信息学及表达模式分析

孙乾2, 吴宇航2, 张雅譞2, 曹竞丹2, 石晶静1, 王超1()   

  1. 1.东北林业大学林木遗传育种国家重点实验室,哈尔滨 150040
    2.东北林业大学林学院,哈尔滨 150040
  • 收稿日期:2021-07-21 出版日期:2022-03-20 发布日期:2022-02-22
  • 通讯作者: 王超 E-mail:wangchao@nefu.edu.cn
  • 作者简介:孙乾(2000—),女,本科生,主要从事林木遗传育种方面研究。
  • 基金资助:
    东北林业大学本科生创新课题资助项目编号(202010225005)

Bioinformatic Analysis and Expression Pattern of LTP Family Genes in Populus davidiana × P. alba var. pyramidalis

Qian Sun2, Yuhang Wu2, Yaxuan Zhang2, Jingdan Cao2, Jingjing Shi1, Chao Wang1()   

  1. 1.State Key Laboratory of Forest Tree Genetics and Breeding,Northeast Forestry University,Harbin 150040
    2.School of Forestry,Northeast Forestry University,Harbin 150040
  • Received:2021-07-21 Online:2022-03-20 Published:2022-02-22
  • Contact: Chao Wang E-mail:wangchao@nefu.edu.cn
  • About author:Sun Qian(2000—),female,undergraduate,major in forest genetics and breeding.
  • Supported by:
    The undergraduate innovation project of Northeast Forestry University(202010225005)

摘要:

以山新杨(Populus davidiana×P. alba var. pyramidalisLTP家族基因为研究对象,初步分析该家族基因的序列特征和表达模式,筛选材性和抗性相关PdbLTP基因,为LTP基因的分子调控机制研究及林木遗传改良提供候选基因。通过蛋白性质分析、多序列比对分析、进化树分析初步分析LTP家族基因的序列特征。利用荧光定量PCR(qRT-PCR)分析重力、NaCl及PEG胁迫处理下山新杨LTP家族基因的表达模式。查找获得8条 PdbLTP基因序列,2条亚家族PdbGLTP基因序列。CDS序列长度在294~396 bp。LTP家族蛋白为疏水性蛋白且具有8个半胱氨酸的保守结构。qRT-PCR结果显示,PdbLTP1PdbLTP3PdbLTP5PdbLTP7基因在应拉木中表达上调;PdbLTP1PdbLTP2PdbLTP3PdbLTP5基因在茎中表达量最高;除PdbLTP5外,其它基因均受盐胁迫诱导;PdbLTP1PdbLTP2PdbLTP3、和PdbLTP5受干旱胁迫诱导。PdbLTP基因家族成员在调控山新杨木质部发育和抵抗非生物胁迫中发挥作用。

关键词: 山新杨, LTP家族, 生物信息学, 表达模式分析

Abstract:

To lay a foundation for studying the molecular regulation mechanism of LTP family gene and molecular genetic improvement of Populus davidiana × P. alba var. pyramidalis, the expression pattern of LTP family genes from P. davidiana × P. alba var. pyramidalis was analyzed.The protein properties, multiple sequence alignments and phylogenetic tree analysis of LTP family members were performed to show their structural features. The P. davidiana × P. alba var. pyramidalis seedlings treated with gravity, salt and PEG stress respectively were subjected to quantitive real time PCR analysis. The expression patterns of PdbLTP family genes were carried out respectively. Eight PdbLTP genes and two subfamily PdbGLTP genes were obtained, and their CDS lengths were ranged from 294-396 bp. LTP family were hydrophobic proteins and had eight cysteine conserved structures, without transmembrane region. qRT-PCR analysis showed that the expression patterns of different PdbLTP family genes were different under gravity processing. Expression levels of PdbLTP1PdbLTP3PdbLTP5 and PdbLTP7 genes were up-regulated in tension wood compared to those in the normal wood. The transcripts levels of PdbLTP1PdbLTP2PdbLTP3PdbLTP5 genes were abundant in stem.Expression of PdbLTP family genes was induced by salt stress except for PdbLTP5. PdbLTP1PdbLTP2PdbLTP3 and PdbLTP5 were up-regulated under drought stress. Different members of PdbLTP gene family play important roles in regulation of xylem development and tolerance to abiotic stress in Populus davidiana × P. alba var. pyramidalis.

Key words: Populus davidiana×P. alba var. pyramidalis, LTP family, bioinformatics, expression pattern analysis

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