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Plant Diversity ›› 2011, Vol. 33 ›› Issue (6): 660-666.DOI: 10.3724/SP.J.1143.2011.11062

• 研究论文 • 上一篇    下一篇

番茄茎腺毛差异表达序列分离与分析

 李婉莎, 刘德团, 杨永平, 胡向阳   

  1. 中国科学院昆明植物研究所,云南 昆明650201
  • 收稿日期:2011-04-08 出版日期:2011-12-25 发布日期:2011-07-01
  • 基金资助:

    中国科学院百人计划项目与国家自然科学基金项目(30871704, 30971452, 31247)

Isolation and Analysis of Differential Expressed ESTs from Stem Trichomes of Lycopersicon esculentum (Solanaceae)

 LI  Wan-Sha, LIU  De-Tuan, YANG  Yong-Ping, HU  Xiang-Yang   

  1. Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
  • Received:2011-04-08 Online:2011-12-25 Published:2011-07-01

摘要:

腺毛是参与植物防御性反应与次生代谢挥发物合成的特异化器官,了解腺毛专一性表达序列标签将有助于我们进一步认识植物腺毛的特异性功能。本文应用磁珠介导的抑制消减杂交方法(SSH),以番茄茎腺毛为检测子(tester),去除腺毛的番茄茎为驱动子(driver),构建番茄茎腺毛差异表达cDNA文库,分离腺毛差异表达基因。随机挑选了108个差异ESTs进行测序,测序结果使用Blast2go程序进行blastx比对、功能注释和KEGG代谢路径分析。结果表明,绝大部分ESTs功能与胁迫响应、物质代谢、生物及非生物刺激反应相关,具有结合、催化功能。这些分离的差异ESTs为进一步研究番茄腺毛的植物防御性机制奠定了基础。

关键词: 表达序列标签, 腺毛, 番茄, 抑制消减杂交

Abstract:

 Glandular trichomes are special organs involved in plant defense response and synthesis of volatile secondary metabolites, analyzing trichome specific expressed sequence tags will help us further understand the specific function of plant trichomes. In this paper, suppression subtractive hybridization(SSH) based on magnetic beads technology was used to isolate differential expressed genes of the glandular trichomes in Lycopersicon esculentum. The differential expressing cDNA library was constructed using the glandular trichomes cDNA as tester and the cDNA from the stem without glandular trichomes as driver. After randomly sequencing 108 differential ESTs, Blast2go program was used to do blastx, functional annotation and metabolism analysis. The results show that most ESTs are related to substance metabolism, response to stress, biotic or abiotic stimulus, and have binding and catalytic function. These differential genes lay the foundation for further research on defense mechanism of the tomato trichomes.

Key words: EST, Glandular trichome, Lycopersicon esculentum, Suppression Subtractive Hybridization(SSH)

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