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Journal of Tea Science ›› 2019, Vol. 39 ›› Issue (4): 392-402.doi: 10.13305/j.cnki.jts.2019.04.004

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Genome-wide Identification and Expression Analysis of SRO Gene Family in Camellia sinensis

GUO Yongchun, WANG Pengjie, CHEN Di, ZHENG Yucheng, CHEN Xuejin, YE Naixing*   

  1. College of Horticulture, Fujian Agriculture and Forestry University/Key Laboratory of Tea Science at Universities in Fujian, Fuzhou 350002, China
  • Received:2019-02-11 Online:2019-08-15 Published:2019-08-19

Abstract: SROs (Similar to rcd one) are plant-specific gene families. In this study, 9 CsSRO gene family members were identified from tea tree genome by bioinformatics method and named as CsRCD1—4 and CsSRO1—5 respectively. All coding proteins of the 9 CsSRO genes have characteristic structural domains PARP and RST, and have similar conserved motifs. The CsSRO genes were divided into 3 groups based on phylogenetic tree analysis, with the group Ι containing CsRCD1—4, the group Ⅱ containing CsSRO1, CsSRO2 and the group Ⅲ containing CsSRO3—5. Gene structure analysis shows that this gene family contained 4 to 9 exons. Analysis of transcriptome data from 8 tea tree tissues shows that CsRCD1/CsRCD3/CsRCD4 might play an important role in different developmental stages of tea plants. Most CsSRO genes were highly expressed in roots and mature leaves. Upstream promoter region analysis found a large number of cis-acting elements closely related to plant development, hormones and stress response. Further expression analysis shows that 9 CsSRO genes were induced by drought and abscission acid treatments, suggesting CsSRO genes may be closely related to drought resistance.

Key words: Camellia sinensis, SRO, phylogeny analysis, stress

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