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草业学报 ›› 2026, Vol. 35 ›› Issue (1): 206-222.DOI: 10.11686/cyxb2025066

• 研究论文 • 上一篇    

老芒麦EsJRL基因家族鉴定与表达分析

柳家乐(), 祁娟(), 李文亮, 路欣, 袁琪, 李明洁, 张奥龙, 杜旺毅   

  1. 甘肃农业大学草业学院,草业生态系统教育部重点实验室,甘肃省草业工程实验室,中-美草地畜牧业可持续研究中心,甘肃 兰州 730070
  • 收稿日期:2025-03-04 修回日期:2025-04-28 出版日期:2026-01-20 发布日期:2025-11-13
  • 通讯作者: 祁娟
  • 作者简介:E-mail: qijuan@gsau.edu.cn
    柳家乐(1999-),男,河南周口人,在读硕士。E-mail: 1810220900@qq.com
  • 基金资助:
    国家现代农业产业技术体系(CARS-34);国家自然科学基金(31660684)

Identification and expression analysis of EsJRL genes in Elymus sibiricus

Jia-le LIU(), Juan QI(), Wen-liang LI, Xin LU, Qi YUAN, Ming-jie LI, Ao-long ZHANG, Wang-yi DU   

  1. College of Pratacultural Science,Gansu Agricultural University,Key Laboratory of Grassland Ecosystem,Ministry of Education,Gansu Grassland Engineering Laboratory,China-US Center for Grazing Land Ecosystem Sustainability,Lanzhou 730070,China
  • Received:2025-03-04 Revised:2025-04-28 Online:2026-01-20 Published:2025-11-13
  • Contact: Juan QI

摘要:

Jacalin类凝集素基因家族在植物中广泛存在,与植物的生长发育、逆境胁迫及病虫害防御密切相关。基于老芒麦基因组数据,利用生物信息学方法对EsJRL基因家族进行鉴定,并对其进行理化性质、染色体分布、系统进化、基因结构、保守结构域和启动子顺式作用元件分析。通过RNA-Seq数据及实时荧光定量PCR(RT-qPCR)对EsJRL基因在不同时期的旗叶及非生物胁迫(外源激素、干旱和低温)下的表达模式进行分析。结果显示,从老芒麦中共鉴定到84个EsJRL基因,在13条染色体两端不均匀分布,编码氨基酸序列长度为93~1574 bp。根据系统发育分析结果,将EsJRL家族成员分为8个组。保守基序分析发现大部分EsJRL基因包含Motif 1、Motif 3和Motif 7。种内共线性结果显示,在老芒麦基因组中共发现39个基因重复事件。非同义替代率与同义替代率的比值(Ka/Ks)分析显示,所有重复基因对均受到纯化选择。顺式作用元件预测表明,EsJRL基因启动子区域富含与光响应、胁迫响应、激素响应以及植物生长发育有关的功能元件。表达模式分析显示,仅有33个EsJRL基因在老芒麦不同时期旗叶中表达,其中19个EsJRL基因在两个种质中均表达。RT-qPCR结果表明,多数EsJRL基因在赤霉素(GA)、脱落酸(ABA)和水杨酸(SA)处理下显著上调(P<0.05),少数EsJRL基因响应干旱和低温胁迫后上调表达,其中,EsJRL28-2基因表达量在干旱胁迫和GA处理下显著下调(P<0.05),低温胁迫下仅EsJRL43基因表达量显著下调(P<0.05)。

关键词: 老芒麦, Jacalin相关凝集素(JRL), 生物信息学, 表达分析, 非生物胁迫

Abstract:

The Jacalin-like lectin gene family is widely found in plants. Its members are known to be involved in plant growth and development, responses to adverse environmental conditions, and defense against pests and diseases. Based on the genomedataof Elymus sibiricus, the EsJRL gene family was identified using bioinformatics methods and analyzed to determine the chromosomal distribution, phylogeny, promoter cis-acting elements, and structure of the genes, and the conserved structural domains and physicochemical properties of the putative proteins. The transcript profiles of EsJRL genes in flag leaves at different growth stages and under various stress conditions (exogenous hormones, drought, and low temperature) were analyzed on the basis of RNA-Seq data and by real-time fluorescence quantitative PCR (RT-qPCR) analysis. A total of 84 EsJRL genes were identified from the E. sibiricus genome. They were unevenly distributed at both ends of 13 chromosomes, and the length of the coding sequences ranged from 93 to 1574 bp. Conserved motif analysis revealed the presence of Motif 1, Motif 3, and Motif 7 in 83, 86, and 86 protein sequences, respectively, indicative of a high degree of structural conservation among the EsJRL gene family. Intraspecific covariance analyses revealed 39 duplication events (18 pairs of tandem duplicated genes and 21 pairs of segmental duplicated genes) in the E. sibiricus genome, and a Ka/Ks analysis showed that all duplicated genes have been subject to purifying selection during their evolutionary history. Cis-acting element prediction showed that the promoter regions of EsJRL genes were enriched with functional elements related to response to light, hormones, and growth and development. Gene expression analyses indicated that only 33 EsJRL genes were expressed in the spikes of two E. sibiricus lines, XH04 and XH05, at different growth stages. Only 19 EsJRL genes were expressed in both germplasm materials. The RT-qPCR results indicated that most EsJRL genes were significantly up-regulated under gibberellin, abscisic acid, and salicylic acid treatments (P<0.05), and a few EsJRL genes were up-regulated in response to drought and low temperature stress. EsJRL28-2 was significantly down-regulated under drought stress and gibberellin treatment (P<0.05). Only one EsJRL gene, EsJRL43, was significantly down-regulated under low temperature stress (P<0.05).

Key words: Elymus sibiricus, Jacalin-related lectin (JRL), bioinformatics, expression analysis, abiotic stresses