干旱区研究 ›› 2019, Vol. 36 ›› Issue (4): 909-915.doi: 10.13866/j.azr.2019.04.15

• 植物生理 • 上一篇    下一篇

野大麦对干旱胁迫的生理响应与转录组分析

宋士伟1, 焦德志1, 陈旭1, 赵泽龙1, 杨允菲2   

  1. 1.齐齐哈尔大学生命科学与农林学院,抗性基因工程与寒地生物多样性保护黑龙江省重点实验室,黑龙江 齐齐哈尔 161006;
    2.东北师范大学草地科学研究所,植被生态科学教育部重点实验室,吉林 长春 130024
  • 收稿日期:2018-10-30 修回日期:2019-01-12 发布日期:2025-10-18
  • 通讯作者: 焦德志. E-mail: jdz_13909@163.com
  • 作者简介:宋士伟(1995-),男,硕士研究生,研究方向为植物逆境生理学与分子生物学. E-mail:1312490123@qq.com
  • 基金资助:
    国家自然科学基金项目(31672471);齐齐哈尔大学研究生创新科研项目(YJSCX2017-028X)

Physiological Response and Transcriptome of Hordeum brevisubulatum to Drought Stress

SONG Shi-wei1, JIAO De-zhi1, CHEN Xu1, ZHAO Ze-long1, YANG Yun-fei2   

  1. 1. Heilongjiang Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Area,College of Life Science, Agriculture and Forestry,Qiqihar University,Qiqihar,161006,Heilongjiang,China;
    2. Key Laboratory of Vegetation Ecology under Ministry of Education,Institute of Grassland Science, Northeast Normal University,Changchun 130024,Jilin,China
  • Received:2018-10-30 Revised:2019-01-12 Online:2025-10-18

摘要: 为了研究野大麦在干旱胁迫下的生理响应以及发掘耐旱性相关基因,对不同浓度聚乙二醇(PEG)6000胁迫条件下的野大麦幼苗进行生理指标测定及转录组测序分析。结果表明:不同浓度PEG 6000胁迫2 d后,野大麦叶片脯氨酸含量呈连续上升趋势,可溶性糖及超氧化物歧化酶(SOD)活性呈先上升后下降趋势。通过隶属函数法选取30 mmol·L-1PEG 6000处理组野大麦叶片进行转录组分析测序,与对照组相比上调表达基因6 868个,下调表达基因2 081个;对差异表达基因进行GO(gene ontology,基因本体)功能分类,可以分为3大类并包含54个功能组;通过KEGG通路富集将6 579个差异表达基因富集到136个通路中,主要包括精氨酸和脯氨酸代谢、糖酵解和糖异生、淀粉和蔗糖代谢、过氧化物酶体等途径,并发掘了各个代谢途径中相关上调表达基因。

关键词: 野大麦, 干旱胁迫, 生理响应, 转录组测序, 扎龙湿地, 松嫩平原

Abstract: The physiological response of Hordeum brevisubulatum to drought stress was researched so as to identify the drought tolerance related to the genes,physiological indexes and transcriptome sequencing of H.brevisubulatum seedlings under different concentrations of polyethylene glycol (PEG) 6000 stress.The results showed that the content of proline in leaves of H.brevisubulatum was increased continuously after the PEG 6000 stress for 2 days,and the activity of soluble sugar and superoxide dismutase (SOD) was increased at first and then decreased.The membership function method was used to select the transcriptome analysis and sequencing of H.brevisubulatum leaves under the treatment of 30 mmol·L-1 PEG 6000.Compared with the control group,the 6 868 up-regulated genes and 2 081 down-regulated genes were identified.The differentially expressed genes were classified into three categories and 54 functional groups by Go function classification.The 6 579 differentially expressed genes were enriched into 136 pathways by KEGG pathway enrichment.Arginine and proline metabolism,glycolysis and gluconeogenesis,starch and sucrose metabolism,peroxisome pathways and other pathways,and the related up-regulated expression genes in various metabolic pathways were discovered.

Key words: Hordeum brevisubulatum, drought stress, physiological response, RNA-Seq, Zhalong Wetland, Songnen Plain