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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (8): 1679-1696.doi: 10.16420/j.issn.0513-353x.2021-1218

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Identification,Expression Analysis and Interaction Validation of CsIDM in Tea Plants

LI Yuteng1, CHEN Yao2, REN Hengze2, LI Congcong1, WANG Haoqian1, CAO Hongli1, YUE Chuan1,*(), HAO Xinyuan2,*(), WANG Xinchao2   

  1. 1 College of Horticulture,Fujian Agriculture and Forestry University,Fuzhou 350002,China
    2 National Center for Tea Improvement,Tea Research Institute Chinese Academy of Agricultural Sciences,Hangzhou 310008,China
  • Received:2022-11-12 Revised:2023-05-05 Online:2023-08-25 Published:2023-08-23
  • Contact: YUE Chuan, HAO Xinyuan

Abstract:

In this study,using different tea plant genomes as a reference,three CsIDM genes were identified and cloned from Camellia sinensis‘Longjing 43’. CsIDM1,belongs to the histone acetyltransferase family,has a typical HAT conserved domain,and is located in the nucleus. CsIDM2 and CsIDM3,which belong to the heat shock protein family,have typical ACD conserved domains,which are located in the nucleus,cell membrane and cytoplasm. The promoter region of CsIDMs contains a variety of cis-acting elements that respond to environmental signals,including light response,plant hormone response,stress response and plant growth-related elements. Expression analysis showed that CsIDMs expressed higher in flower buds,axillary buds and stems,but lower in fully open flowers,which suggests a certain tissue specificity. CsIDMs were differentially expressed under drought,high temperature and biotic stresses. During the formation and release of dormancy in overwintering buds,the expression of CsIDM1 showed a high-low-high expression pattern in the stages of paradormancy,endodormancy and ecodormancy. It was confirmed that CsIDM2 interacts with CsIDM3 to form a heterodimer by bimolecular fluorescence complementation. CsIDM2 and CsIDM3 interact with CsMBD5 and CsMBD16,respectively. In summary,CsIDMs play an important role in the stress response and bud dormancy removal of tea plants,and may participate in the regulation of methylation through the formation of protein complexes.

Key words: Camellia sinensis, demethylation, IDM complex, subcellular localization, expression analysis, BiFC assay