欢迎访问《植物研究》杂志官方网站,今天是 分享到:

植物研究 ›› 2022, Vol. 42 ›› Issue (6): 997-1004.doi: 10.7525/j.issn.1673-5102.2022.06.009

• 分子生物学 • 上一篇    下一篇

橡胶树DELLA基因HbRGL1的克隆与表达分析

覃碧1, 刘明洋2, 王萌2, 王立丰1, 黄飞3()   

  1. 1.中国热带农业科学院橡胶研究所,海口 571101
    2.海南大学植物保护学院,海口 570228
    3.海南瑞橡热带经济投资集团有限公司,海口 570105
  • 收稿日期:2021-07-14 出版日期:2022-11-20 发布日期:2022-11-22
  • 通讯作者: 黄飞 E-mail:13876629129@163.com
  • 作者简介:覃碧(1982—),女,博士,副研究员,主要从事产胶植物种质资源收集与评价、天然橡胶合成调控研究。
  • 基金资助:
    国家自然科学基金项目(31970364)

Cloning and Expression Analysis of DELLA gene HbRGL1 from Hevea brasiliensis Müll. Arg

Bi QIN1, Mingyang LIU2, Meng WANG2, Lifeng WANG1, Fei HUANG3()   

  1. 1.Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101
    2.School of Plant Protection,Hainan University,Haikou 570228
    3.Hainan Ruixiang Tropical Economic Investment Group Co. Ltd,Haikou 570105
  • Received:2021-07-14 Online:2022-11-20 Published:2022-11-22
  • Contact: Fei HUANG E-mail:13876629129@163.com
  • About author:Qin Bi(1982—),female,associate research fellow,mainly engaged in collection and evaluation of rubber-producing germplasm resources and regulation of natural rubber synthesis.
  • Supported by:
    National Natural Science Foundation Program of China(31970364)

摘要:

DELLA蛋白属于植物特异性GRAS家族,是植物生长的负调控因子。为揭示橡胶树DELLA基因在橡胶树生长发育中的分子调控机制,本研究从橡胶树热研7-33-97中克隆HbRGL1的cDNA全长序列,含1 851 bp的ORF,编码616个氨基酸。生物信息学分析表明HbRGL1属于不稳定的亲水蛋白,定位在细胞核上,含有DELLA和GRAS保守结构域。系统进化关系分析表明HbRGL1与橡胶树HbGAIL、木薯MeGAIL、蓖麻RcGAI、麻风树JcGAI聚为一类。qRT-PCR分析表明HbRGL1在橡胶树不同组织中的表达量差异显著,在花中的表达量最高。在生长素(IAA)、乙烯利(ET)和脱落酸(ABA)等不同激素处理叶片中HbRGL1表达量均呈现显著上调趋势,尤其对赤霉素(GA3)的应答具有反应快速且上调表达倍数最高。本研究为进一步阐明HbRGL1在橡胶树生长发育中的功能奠定理论基础。

关键词: 巴西橡胶树, HbRGL1, 赤霉素, 基因表达

Abstract:

DELLA protein belongs to the plant-specific GRAS family and is a negative regulator of plant growth. To reveal the molecular regulation mechanism of DELLA gene in rubber tree growth and development, the full-length cDNA sequence of HbRGL1 was cloned from rubber tree cultivar Reyan 7-33-97. The ORF of HbRGL1 was 1 851 bp, and encoded 616 amino acids. Bioinformatics analysis showed that HbRGL1 was an unstable hydrophilic protein containing two conserved domains of DELLA and GRAS, and localized in the nucleus. Phylogenetic analysis showed that HbRGL1 was clustered with HbGAIL of rubber tree, MeGAIL of Manihot esculenta, RcGAI of Ricinus communis, and JcGAIof Jatropha curcas. qRT-PCR analysis showed that the expression level of HbRGL1 in different tissues of rubber treewas significantly different, and its expression level was the highest in flower. HbRGL1 expression was significantly up-regulated in leaves treated by different hormones such as auxin(IAA), ethephon(ET) and abscisic acid(ABA). Especially, and it rapidly responded to GA3 treatments, and had the highest up-regulation of expression level. The study provided theoretical basis for further elucidating the function of HbRGL1 in the growth and development of rubber tree.

Key words: Hevea brasiliensis, HbRGL1, gibberellin, gene expression

中图分类号: