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植物研究 ›› 2022, Vol. 42 ›› Issue (4): 613-625.doi: 10.7525/j.issn.1673-5102.2022.04.011

• 遗传与育种 • 上一篇    下一篇

毛果杨CNGC家族全基因组鉴定及胁迫响应分析

王雪莹1, 王瑞琪1, 张洋1, 刘聪1, 夏德安1, 魏志刚2()   

  1. 1.林木遗传育种国家重点实验室,东北林业大学,哈尔滨 150040
    2.国家林业与草原局盐碱地研究中心,中国林业科学研究院,北京 100091
  • 收稿日期:2021-05-24 出版日期:2022-07-20 发布日期:2022-07-15
  • 通讯作者: 魏志刚 E-mail:zhigangwei1973@163.com
  • 作者简介:王雪莹(1996—),女,硕士研究生,主要从事林木遗传育种研究。
  • 基金资助:
    中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020ZA005);国家自然科学基金项目(31770640)

Genome‑wide Identification and Stress Response Analysis of Cyclic Nucleotide-gated Channels(CNGC) Gene Family in Populus trichocarpa

Xueying WANG1, Ruiqi WANG1, Yang ZHANG1, Cong LIU1, Dean XIA1, Zhigang WEI2()   

  1. 1.State Key Laboratory of Forest Tree Genetics and Breeding,Northeast Forestry University,Harbin 150040
    2.Saline Soil Research Center,National Forestry and Grassland Administration,Chinese Academy of Forestry,Beijing 100091
  • Received:2021-05-24 Online:2022-07-20 Published:2022-07-15
  • Contact: Zhigang WEI E-mail:zhigangwei1973@163.com
  • About author:WANG Xueying(1996—),male,postgraduate,mainly engaged in forest tree genetics and breeding research.
  • Supported by:
    Central Public-interest Scientific Institution Basal Research Fund(CAFYBB2020ZA005);National Natural Science Foundation of China(31770640)

摘要:

植物环核苷酸门控离子通道(cyclic nucleotide-gated channels,CNGC)家族具有多种生物学功能,尤其是在植物的生长发育及逆境胁迫响应中发挥着重要的作用。本研究通过生物信息学方法及qRT-PCR对PtrCNGC家族成员蛋白的基本理化性质与结构特征、系统发育、基因结构和保守基序、启动子顺式作用元件,以及基因表达模式进行分析。结果表明:在毛果杨(Populus trichocarpa)全基因组中共鉴定出19个PtrCNGC基因,PtrCNGC家族成员可分为4个亚群(Ⅰ、Ⅱ、Ⅲ和Ⅳ亚群),其中第Ⅳ亚群分为2个亚组(Ⅳa组和Ⅳb组)。PtrCNGC基因编码的蛋白均为碱性蛋白,此外,该家族仅有1个成员为疏水性蛋白,其余成员全部为亲水性蛋白。19个PtrCNGC不均匀地分布于毛果杨的11条染色体上,剩余8条染色体上没有成员分布。PtrCNGC家族包含7对同源基因且它们之间的Ka/Ks值均远小于1。PtrCNGC家族各亚群成员之间的基因结构、蛋白保守基序分布差异较小。启动子顺式作用元件预测分析发现,PtrCNGC基因序列启动子区域存在响应多种激素以及逆境胁迫相关的作用元件。qRT-PCR结果表明,PtrCNGC家族在不同组织中的表达具有特异性,在茎中的表达量较高,在根和叶中的表达量较低;在盐胁迫和干旱胁迫下,PtrCNGC家族同一分支上的多数成员表现出相似的表达模式。本研究结果为进一步研究毛果杨CNGC家族在非生物胁迫中的功能提供参考。

关键词: 毛果杨, CNGC家族, 生物信息学分析, 逆境胁迫

Abstract:

The plant cyclic nucleotide-gated channels(CNGC) family has a variety of biological functions and plays an important role in the growth and development of plants and the response to stress. In this study, bioinformatics methods and qRT-PCR were used to analyze the basic physicochemical properties, structural characteristics, phylogeny, gene structure and conserved motif, cis-acting elements of the promoter and gene expression patterns of the PtrCNGC gene family members respectively. The results showed that a total of 19 PtrCNGC genes were identified in the whole genome of Populus trichocarpa. PtrCNGC gene family could be divided into four subgroups(Ⅰ, Ⅱ, Ⅲ and Ⅳ), and subgroup Ⅳ could be divided into two subgroups(Ⅳa and Ⅳb). The proteins encoded by the PtrCNGC genes were all basic proteins, and only one member of the PtrCNGC gene family was hydrophobic protein, while all the other members were hydrophilic proteins. A total of 19 PtrCNGCs were distributed unevenly on 11 chromosomes of P. trichocarpa, while the remaining 8 chromosomes had no members distributed. The PtrCNGC gene family contained seven pairs of homologous genes and the Ka/Ks value between them was far less than one. There was little difference in gene structure and protein conserved motif distribution among the family members. Predictive analysis of cis-acting elements in the promoter region of the PtrCNGC gene sequence showed that there were acting elements related to various hormones and stress. The qRT-PCR results showed that the expression of PtrCNGC gene family was specific in different tissues, with higher expression levels in stems and lower expression levels in roots and leaves. Under salt stress and drought stress, most members of the same branch of the PtrCNGC gene family showed similar expression patterns. The results of this study provid a reference for further study on the function of PtrCNGC family in abiotic stress.

Key words: Populus trichocarpa, CNGC gene family, bioinformatic analysis, abiotic stresses

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