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园艺学报 ›› 2024, Vol. 51 ›› Issue (1): 91-102.doi: 10.16420/j.issn.0513-353x.2023-0128

• 遗传育种·种质资源·分子生物学 • 上一篇    下一篇

茶树镁离子螯合酶H亚基基因CsChlH的克隆及其表达分析

叶玙璠1,2,*, 王誉洁1,*, 傅前媛1,2, 王璐1, 郝心愿1, 丁长庆1, 王新超1, 曹红利2,3,**(), 李娜娜1,**   

  1. 1 中国农业科学院茶叶研究所,国家茶树改良中心,农业农村部特种经济动植物生物学与遗传育种重点实验室,杭州 310008
    2 福建农林大学园艺学院,茶学福建省高校重点实验室,福州 350002
    3 西南大学食品科学学院,重庆 400715
  • 收稿日期:2023-04-25 修回日期:2023-08-28 出版日期:2024-01-25 发布日期:2024-01-16
  • 通讯作者: **(E-mail:nanali@tricaas.com,lili9885@126.com)
  • 作者简介:
    *共同第一作者
  • 基金资助:
    国家自然科学基金项目(31700615); 国家自然科学基金项目(32172633); 中国农业科学院农业科技创新工程项目(CAAS-ASTIP-2021-TRICAAS)

Cloning and Expression Analysis of Mg-Chelatase H Subunit Gene CsChlH in Tea Plant(Camellia sinensis

YE Yufan1,2, WANG Yujie1, FU Qianyuan1,2, WANG Lu1, HAO Xinyuan1, DING Changqing1, WANG Xinchao1, CAO Hongli2,3,**(), LI Nana1,**   

  1. 1 Key Laboratory of Biology,Genetics and Breeding of Special Economic Animals and Plants,Ministry of Agriculture and Rural Affairs,National Center for Tea Improvement,Tea Research Institute,Chinese Academy of Agricultural Sciences,Hangzhou 310008,China
    2 Key Laboratory of Tea Science at Universities in Fujian,College of Horticulture,Fujian Agriculture and Forestry University,Fuzhou 350002,China
    3 College of Food Science,Southwest University,Chongqing 400715,China
  • Received:2023-04-25 Revised:2023-08-28 Published:2024-01-25 Online:2024-01-16

摘要:

克隆获得茶树(Camellia sinensis)镁离子螯合酶H亚基基因CsChlH完整开放阅读框序列(NCBI登录号:ON256194),对应编码1 382个氨基酸残基。系统进化树分析显示,茶树CsChlH与猕猴桃AcChlH的亲缘关系密切。启动子克隆及序列分析显示,CsChlH可能响应光照、干旱、热激、低温、ABA和乙烯等多种信号,且可能调控叶绿素、类黄酮、糖等代谢以及叶绿体、叶肉、保卫细胞等器官发育。CsChlH蛋白定位于叶绿体中。茶树不同组织表达分析显示,CsChlH在富含叶绿素的源组织中表达量高,而在缺乏叶绿素的库组织中表达量低。CsChlH响应长时程弱光、低温、干旱而表达下调,短时程ABA、乙烯以及长时程高温信号能诱导其表达上调。研究结果揭示了CsChlH在茶树叶绿素代谢和胁迫响应中的重要作用。

关键词: 茶树, CsChlH, 启动子, 基因表达, 脱落酸, GUS酶活

Abstract:

In this study,the complete open reading frame sequence of CsChlH gene encoded 1 382 amino acid residues was cloned in tea plant(NCBI accession number:ON256194). Phylogenetic tree analysis showed that CsChlH was closely related to AcChlH of kiwifruit. Promoter cloning and sequence analysis showed that CsChlH gene may respond to multiple signals such as light,drought,heat shock,low temperature,ABA,ethylene,and may regulate the metabolism of chlorophylls,flavonoids,sugars,as well as the development of chloroplast,mesophyll,guard cell and other organs. CsChlH protein was localized in the chloroplast. Tissue-specific expression analysis found that CsChlH gene was highly expressed in the chlorophyll-rich source tissues but lowly expressed in the chlorophyll-deficient sink tissues. The expression of CsChlH gene was down-regulated in response to long-term low light conditions,cold and drought stresses,while up-regulated by short-term ABA,ethylene and long-term heat stress. The results revealed that CsChlH gene played a vital role in the regulation of chlorophyll metabolism and stress resistance of tea plant.

Key words: Camellia sinensis, CsChlH, promoter, gene expression, abscisic acid, GUS enzyme activity