欢迎访问《植物研究》杂志官方网站,今天是 2025年4月20日 星期日 分享到:

植物研究 ›› 2025, Vol. 45 ›› Issue (2): 191-201.doi: 10.7525/j.issn.1673-5102.2025.02.005

• 研究论文 • 上一篇    

白桦BpGRFs基因鉴定与功能初步分析

孙子腾, 王新宇, 侯丽丽, 刘月影, 郑志民()   

  1. 东北林业大学林学院,林木遗传育种全国重点实验室,哈尔滨 150040
  • 收稿日期:2024-12-11 出版日期:2025-03-20 发布日期:2025-04-04
  • 通讯作者: 郑志民 E-mail:zmzheng@nefu.edu.cn
  • 作者简介:孙子腾(2000—),男,硕士研究生,主要从事林木遗传育种研究。
  • 基金资助:
    中国博士后科学基金第75批面上项目(2024M750382)

Identification and Preliminary Functional Analysis of the BpGRFs Gene in Betula Platyphylla

Ziteng SUN, Xinyu WANG, Lili HOU, Yueying LIU, Zhimin ZHENG()   

  1. State Key Laboratory of Tree Genetics and Breeding,College of Forestry,Northeast Forestry University,Harbin 150040
  • Received:2024-12-11 Online:2025-03-20 Published:2025-04-04
  • Contact: Zhimin ZHENG E-mail:zmzheng@nefu.edu.cn

摘要:

生长调节因子(GROWTH-REGULATING FACTOR,GRF)是一种植物中广泛存在的特异性转录因子,在植物的生长发育和胁迫响应过程中发挥着重要作用。该研究对白桦(Betula platyphyllaGRF基因家族进行生物信息学分析发现,白桦中包含9个GRF基因家族成员,均具有保守的WRC和QLQ结构域,启动子顺式作用元件预测分析发现,BpGRFs家族基因的启动子区域包含丰富的响应生长发育、激素代谢和胁迫反应等的相关元件。qRT-PCR结果表明,BpGRF4在白桦的各组织中均呈现高水平表达,进而通过农杆菌介导法获得了白桦过表达BpGRF4株系(OE-1、OE-2、OE-3),用以探究BpGRF4在白桦发育过程中的作用,过表达BpGRF4株系在株高、地径、节间长度、分枝长度均显著提升。另外,OE-3株系的皮层、韧皮部和髓心面积显著增大,叶片表皮细胞较野生型增大约51.6%。综上,过表达BpGRF4的白桦植株生长发育受到了积极调控作用,该结果为解析GRF基因家族在白桦生长发育过程中发挥的功能提供了一定理论依据。

关键词: 白桦, 生长调节因子, 生物信息学, 生长发育

Abstract:

GROWTH-REGULATING FACTOR(GRF) is a specific transcription factor widely found in plants, which plays an important role in plant growth and development and stress response. In this study, bioinformatics analysis of the birch(Betula platyphyllaGRF gene family revealed that the birch reference genome contained nine GRF gene family members with conserved WRC and QLQ structural domains, and prediction analysis of promoter cis-acting elements in the BpGRFs family genes revealed that it contained abundant elements related to growth and development, hormone metabolism and stress response. The qRT-PCR results showed that BpGRF4 was highly expressed in all tissues of birch, and Agrobacterium-mediated method was used to obtain birch overexpressing BpGRF4 lines(OE-1,OE-2,OE-3) and the role of BpGRF4 in the birch development was explored, and the BpGRF4 overexpression lines were significantly elevated in plant height, diameter of the ground, internode length, and branching length respectively. In addition, the area of cortex, phloem and core of OE-3 line were significantly increased, and the leaf epidermal cells were about 51.6% larger than that of the wild type. In conclusion, the growth and development of birch overexpressed BpGRF4 were positively regulated, which provided the theoretical basis for clarifying the GRF gene family function in the growth and development of birch.

Key words: birch, GRF, bioinformatics, growth and development

中图分类号: