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园艺学报 ›› 2006, Vol. 33 ›› Issue (6): 1247-1252.

• 研究论文 • 上一篇    下一篇

甜椒CaHSP26的cDNA克隆与表达

郭尚敬1, 3;郭鹏1;董新纯1;孟庆伟1, 2

  

  1. (1 山东农业大学生命科学学院, 山东泰安271018; 2 山东省作物生物学重点实验室, 山东泰安271018; 3 聊城大学生命科学学院, 山东聊城252000)
  • 收稿日期:2006-04-29 修回日期:2006-07-02 出版日期:2006-12-25 发布日期:2006-12-25
  • 通讯作者: 孟庆伟

cDNA Cloning and Expression of CaHSP26 from Sweet Pepper

Guo Shangjing1, 3;Guo Peng1;Dong Xinchun1;Meng Qingwei1, 2
  

  1. (1College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong 271018, China; 2 Key Laboratory of Crop Biology of Shandong Province, Tai'an, Shandong 271018, China; 3College of Life Sciences, Liaocheng University, Liaocheng, Shandong 252000, China)
  • Received:2006-04-29 Revised:2006-07-02 Online:2006-12-25 Published:2006-12-25
  • Contact: Meng Qingwei

摘要: 用RT-PCR技术从热激处理的甜椒(Capsicum annuum L. ) 叶片中克隆了叶绿体小分子量热激蛋白(sHSP) 基因的cDNA序列, 其全长为917 bp, 命名为CaHSP26。Southern杂交分析表明该基因在甜椒基因组中为单基因。Northern杂交结果显示该基因在甜椒根、茎、叶中受高温诱导表达。高温( 50℃)胁迫下, 在大肠杆菌中异源表达CaHSP26可以维持大肠杆菌较高的细胞活力。这些结果表明在高温胁迫下植物叶绿体sHSP对细胞具有保护作用。

关键词: 辣椒, 小分子量热激蛋白, 基因克隆, 异源表达

Abstract: Full length 917 bp of chloroplast sHSP cDNA was isolated from heat-shocked sweet pepper leaves by RT-PCR approach, named CaHSP26 (AY224603 ). A single-gene was found in sweet pepper genomic DNA by southern-blot analysis. Northern blot revealed that heat stress induced the expression of CaHSP26 in roots, stems and leaves of sweet pepper. The heterologous expression of CaHSP26 in E. coli could maintain higher cell viability of E. coli under high temperature stress ( 50℃). These results indicated that plant chloroplast sHSP could p rotect cell against heat stress.

Key words: Sweet pepper, Small heat shock protein (sHSP), Gene cloning, Heterologous expression

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