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园艺学报 ›› 2021, Vol. 48 ›› Issue (12): 2481-2496.doi: 10.16420/j.issn.0513-353x.2020-0717

• 研究报告 • 上一篇    下一篇

龙眼TCP家族全基因组鉴定与表达分析

蒋梦琦1, 薛晓东1, 苏立遥1, 陈燕1, 张舒婷1, 李晓斐1, 王培育2, 张梓浩1, 赖钟雄1, 林玉玲1,*()   

  1. 1福建农林大学园艺植物生物工程研究所,福州 350002
    2三明农业科学研究院,福建三明 365000
  • 收稿日期:2021-03-11 修回日期:2021-07-30 发布日期:2022-01-04
  • 通讯作者: 林玉玲 E-mail:buliang84@163.com
  • 基金资助:
    国家自然科学基金项目(31672127);福建省高原学科建设经费项目(102/71201801101);福建农林大学科技创新专项(CXZX2019033S)

Genome-wide Identification and Expression Analysis of TCP Family in Dimocarpus longan

JIANG Mengqi1, XUE Xiaodong1, SU Liyao1, CHEN Yan1, ZHANG Shuting1, LI Xiaofei1, WANG Peiyu2, ZHANG Zihao1, LAI Zhongxiong1, LIN Yuling1,*()   

  1. 1Institute of Horticultural Biotechnology,Fujian Agriculture and Forestry University,Fuzhou 350002,China
    2Sanming Academy of Agricultural Sciences,Sanming,Fujian 365000,China
  • Received:2021-03-11 Revised:2021-07-30 Published:2022-01-04
  • Contact: LIN Yuling E-mail:buliang84@163.com

摘要:

利用生物信息学方法对龙眼TCP(DlTCP)基因家族进行全基因组鉴定,通过实时荧光定量PCR(qRT-PCR)技术分析龙眼TCP基因家族成员体胚发生早期表达模式及其对ABA和MeJA的响应模式。从龙眼基因组数据库中共鉴定获得20个龙眼TCP成员。这些DlTCP蛋白包含169 ~ 540个不等的氨基酸残基,分子量介于39.6 ~ 57.2 kD之间,理论等电点介于5.90 ~ 9.45。亚细胞定位预测显示,18个成员在细胞核中。染色体定位显示,DlTCP分布在龙眼15条染色体中的11条染色体上;共线性分析发现有12个DlTCP基因参与片段复制事件。启动子顺式作用元件分析显示,DlTCP成员启动子序列上含有响应激素应答、调控生长发育的元件。系统进化分析可将DlTCP分为2类,均具有典型TCP结构域。体胚发生早期表达模式分析表明,DlTCP2/4a/4b/13/17/18/19/23均在胚性愈伤组织阶段高表达,DlTCP5b/

关键词: 龙眼, TCP转录因子, 成员鉴定, ABA, MeJA, 实时荧光定量PCR

Abstract:

To study the potential function of longan TCP gene family,bioinformatics methods were used to perform the genome-wide identification of family in Dimocarpus longan TCP genes(DlTCP). The expression patterns of DlTCP in longan somatic embryo development and their responses to ABA and MeJA were detected by the real-time quantitative PCR(qRT-PCR). In this study,20 longan TCP gene family members were identified in the longan genome database. These DlTCP proteins contained 169- 540 amino acid residues,with molecular weights ranging from 39.6 kD to 57.2 kD,and theoretical isoelectric points ranging from 5.90-9.45. The prediction of subcellular localization showed that 18 members were located in the nucleus. DlTCP were distributed on 11 of the 15 chromosomes of longan. Synteny analysis revealed that 12 of DlTCP were involved in fragment replication events. Promoter cis-acting elements analysis showed that DlTCP family members contained hormone response cis-acting elements and regulate growth and development cis-acting elements. The longan TCP family members can be divided into two categories in phylogenetic evolution,and they all had typical TCP domains. QRT-PCR results showed that DlTCP2/4a/4b/13/17/18/19/23 were highly expressed in the embryogenic callus(EC)stage,DlTCP5b/8 were highly expressed in the incomplete compact pro-embrogenic cultures(IcpEC)stage,and only DlTCP20a was highly expressed in the globular embryos(GE)stage,indicating that the higly expression of DlTCP may contribute to the morphogenesis of early somatic embryos in longan. In addition,the family members also exhibited different expression patterns after exogenous hormones treatments. After exogenous ABA induction,the expression of four DlTCP members was significantly down regulated,and four were up-regulated;After MeJA induction,the expression of three members was significantly down-regulated and four up-regulated,indicating that DlTCP members can respond to ABA and MeJA.

Key words: Dimocarpus longan, TCP transcription factor, gene famliy identification, ABA, MeJA, qRT-PCR

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