华北农学报 ›› 2025, Vol. 40 ›› Issue (6): 21-30. doi: 10.7668/hbnxb.20195788

所属专题: 油料作物 抗旱节水 生物技术

• 作物遗传育种·种质资源·生物技术 • 上一篇    下一篇

甘蓝型油菜Metacaspase家族基因鉴定及其对干旱胁迫响应分析

李天1, 王道杰2, 张晓娟1, 侯扬子1   

  1. 1 陕西理工大学 生物科学与工程学院,陕西 汉中 723001
    2 河南大学 农学院,河南 开封 475000
  • 收稿日期:2025-03-17 出版日期:2025-12-31
  • 通讯作者:
    张晓娟(1982—),女,陕西咸阳人,副教授,博士,硕士生导师,主要从事油菜分子遗传研究。
  • 作者简介:

    李 天(2000—),男,安徽阜阳人,在读硕士,主要从事油菜分子遗传研究。

  • 基金资助:
    陕西理工大学人才启动项目(SLGRCQD2115); 陕西省科技厅项目(2023-YBNY-070); 三秦英才,陕西省级一流团队“陕西理工大学污染土壤修复与资源利用创新团队”项目

Identification of Metacaspase Family Genes in Brassica napus and Analysis of Gene Expression under Drought Stress

LI Tian1, WANG Daojie2, ZHANG Xiaojuan1, HOU Yangzi1   

  1. 1 School of Biological Science and Engineering,Shaanxi University of Technology,Hanzhong 723001,China
    2 College of Agriculture,Henan University,Kaifeng 475000,China
  • Received:2025-03-17 Published:2025-12-31

摘要:

Metacaspase(MC)是一种精氨酸/苏氨酸特异性蛋白酶,研究表明其在细胞程序性死亡中发挥作用。为探究 MC家族基因在甘蓝型油菜基因组中的分布及其是否响应干旱胁迫,对甘蓝型油菜MC家族基因成员的理化性质、系统发育、基因结构、保守结构域、顺式作用元件及干旱(PEG6000)和脱落酸(ABA)胁迫下的表达模式进行系统分析。共鉴定到25个BnMC基因,染色体定位显示,25个BnMC分布于13条染色体上,17个成员定位于细胞核,7个成员定位在细胞质;系统进化树将BnMC分为2个大类(Ⅰ型和Ⅱ型),4个分支(Group A、Group B、Group C和Group D),同一分支的BnMC具有相似的基因结构和保守基序分布。MC家族基因的核心启动子区包含的顺式作用元件有光响应元件、植物激素响应元件、植物生长发育响应元件和胁迫响应元件,非生物胁迫响应相关的所有顺式作用元件中,脱落酸响应元件(ABRE)数目最多,为79个,所有成员都含有该元件。转录组学结果分析发现,干旱胁迫后BnMC10BnMC22BnMC1BnMC12BnMC8的表达量上调,BnMC4BnMC5表达下调。qRT-PCR检测显示,BnMC10BnMC8BnMC1BnMC12在根和叶中均有表达,且受PEG6000和ABA诱导上调,其中BnMC1受诱导上调最为显著。综上所述,甘蓝型油菜响应干旱胁迫涉及对MC家族基因的表达水平调控。

关键词: 甘蓝型油菜, Metacaspase, 基因家族, 干旱胁迫

Abstract:

Metacaspase (MC) belongs to arginine/threonine specific protease,studies have shown that it plays a role in programmed cell death.To investigate the distribution of MC family genes in the genome of Brassica napus and whether they respond to drought stress,this study systematically analyzed the physicochemical properties,phylogeny,gene structure,conserved domains,cis-acting elements,and expression patterns of MC family genes under drought(PEG6000)and abscisic acid(ABA)stress in B.napus.A total of 25 BnMC genes were identified.Chromosomal localization showed that the 25 BnMCs were distributed on 13 chromosomes.Subcellular localization prediction showed that 17 members of the BnMC family were localized in the nucleus and seven members were in the cytoplasm.The phylogenetic tree classified BnMC into two major classes (Type Ⅰ and Type Ⅱ) and four branches (Group A,Group B,Group C,and Group D).BnMCs of the same branch had similar gene structure and conserved motif distribution.The core promoter regions of BnMC contained four types of cis-acting elements:light response element,phytohormone response element,plant growth and development response element and stress response element.Among all the cis-acting elements related to abiotic stress responses,the abscisic acid response element (ABRE) was the most abundant,with a total of 79.All members contained this cis-acting element.The transcriptome sequencing revealed that the expressions of BnMC10,BnMC22,BnMC1,BnMC12 and BnMC8 were up-regulated and the expressions of BnMC4 and BnMC5 were down-regulated after drought treatment.The qRT-PCR assay showed BnMC10,BnMC8,BnMC1 and BnMC12 genes were expressed in both roots and leaves and were up-regulated by both PEG6000 and ABA,with BnMC1 showing the most significant up-regulating changes.In summary,the response of B.napus to drought stress involves the regulation of the expression level of MC family genes.

Key words: Brassica napus, Metacaspase, Gene family, Drought stress

中图分类号: 

引用本文

李天, 王道杰, 张晓娟, 侯扬子. 甘蓝型油菜Metacaspase家族基因鉴定及其对干旱胁迫响应分析[J]. 华北农学报, 2025, 40(6): 21-30. doi: 10.7668/hbnxb.20195788.

LI Tian, WANG Daojie, ZHANG Xiaojuan, HOU Yangzi. Identification of Metacaspase Family Genes in Brassica napus and Analysis of Gene Expression under Drought Stress[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(6): 21-30. doi: 10.7668/hbnxb.20195788.