瓜实蝇热激蛋白Hsp90基因克隆及表达分析
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  • 英文篇名:Cloning and expression of the Bactrocera cucurbitae (Coquillett) heat shock protein 90 gene
  • 作者:姜建军 ; 黄立飞 ; 黎柳锋 ; 陈红松 ; 王凤英 ; 杨朗
  • 英文作者:JIANG Jian-Jun;HUANG Li-Fei;LI Liu-Feng;CHEN Hong-Song;WANG Feng-Ying;YANG Lang;Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Plant Protection Research Institute,Guangxi Academy of Agricultural Sciences;
  • 关键词:瓜实蝇 ; 高温胁迫 ; 抗药性 ; Hsp90 ; 表达
  • 英文关键词:Bactrocera cucurbitae;;heat stress;;resistance;;Hsp90;;gene expression
  • 中文刊名:KCZS
  • 英文刊名:Chinese Journal of Applied Entomology
  • 机构:广西壮族自治区农业科学院植物保护研究所广西作物病虫害生物学重点实验室;
  • 出版日期:2019-05-26
  • 出版单位:应用昆虫学报
  • 年:2019
  • 期:v.56
  • 基金:广西自然科学基金(2018GXNSFAA138068;2015GXNSFBA139072);; 广西科技重大专项(AA17204041);; 广西作物病虫害生物学重点实验室项目(2016-ST-4)
  • 语种:中文;
  • 页:KCZS201903008
  • 页数:10
  • CN:03
  • ISSN:11-6020/Q
  • 分类号:86-95
摘要
【目的】热激蛋白基因Hsps在生物体抗逆性过程中具有重要的作用,本文旨在通过阐释瓜实蝇Bactrocera cucurbitae (Coquillett)热激蛋白基因Hsp90在其对环境温度适应性及抗药性过程中的功能作用,为瓜实蝇综合治理提供理论基础。【方法】采用RACE-PCR技术克隆瓜实蝇的Hsp90基因cDNA序列,利用生物信息学工具分析序列特征,并通过实时定量PCR技术分析高温胁迫、阿维菌素诱导和抗性及敏感品系中该基因的表达情况。【结果】克隆获得的瓜实蝇Hsp90基因cDNA全长2 654 bp,命名为Bc-Hsp90,GenBank登录号为KP864677,含2 145 bp的开放阅读框,编码715个氨基酸蛋白,具有HSP90蛋白家族共有模式和1个基序标签,C-末端具有MEEVD基序,属于胞质型热激蛋白。系统发育分析显示,Bc-Hsp90基因高度保守。不同高温(32-40℃)胁迫处理1 h和2 h后,瓜实蝇成虫体内Bc-Hsp90的相对表达量均显著高于对照组(26℃),并在38℃和40℃表达量最高;阿维菌素长期筛选的RS品系,Bc-Hsp90表达量是对照SS品系的2.13倍,但RS品系以LC90剂量诱导后,Bc-Hsp_(90)表达量显著下调,随着恢复时间延长其表达量逐渐升高,96 h后恢复到对照水平。【结论】推测Bc-Hsp90在瓜实蝇耐热性和抗阿维菌素过程中可能起着重要作用。
        [Objectives] To investigate the function of the heat shock protein Hsp90 gene of Bactrocera cucurbitae(Coquillett)(Bc-Hsp90) under different temperatures and pesticide stress in order to improve control of this pest. [Methods]The cDNA full-length fragment of the Bc-Hsp90 was cloned using the RACE-PCR method. Bioinformatics tools were used to analyze the sequence characteristics, and real-time quantitative PCR was used to detect the expression levels of the gene under heat stress, and after exposure to the pesticide abamectin, in abamectin-resistant and susceptible strains. [Results] The complete sequence of 2 654 bp was obtained(Accession number: KP864677) and was found to contain a 2 145 bp open reading frame(ORF) encoding 715 amino acids. Family signatures of the HSP90 protein and the cytoplasm of the Hsp90 gene C-terminal region MEEVD motif were detected. Phylogenetic analysis indicates that Bc-Hsp90 is highly conserved. Real-time quantitative PCR results showed that 1 h and 2 h of heat stress(32-40℃)up-regulated the expression of Bc-Hsp90. Expression peaked at 38℃ and 40℃ and expression in an abamectin resistant strain(RS) was 2.13 times higher than in a sensitive strain(SS). The expression of the Bc-Hsp90 gene was down-regulated after exposure to an LC_(90) dose of abamectin and returned to normal levels after 96 h. [Conclusion] The expression level of Bc-Hsp90 could play an important role in heat resistance and pesticide tolerance in B. cucurbitae.
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