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Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (5): 947-959.doi: 10.16420/j.issn.0513-353x.2020-0800

• Research Papers • Previous Articles     Next Articles

Genome-wide Identification,Comparative Evolution and Expression Analysis of PEBP Gene Family from Capsicum annuum

NIU Xiqaing1, LUO Xiaoyun1, KANG Kaicheng2, HUANG Xianzhong1,2,*(), HU Nengbing1, SUI Yihu1, AI Hao1   

  1. 1College of Agriculture,Anhui Science and Technology University,Fengyang,Anhui 233100,China
    2Plant Genomics Laboratory,College of Life Sciences,Shihezi University,Shihezi,Xinjiang 832003,China
  • Received:2020-12-07 Revised:2021-03-21 Online:2021-05-25 Published:2021-06-07
  • Contact: HUANG Xianzhong E-mail:huangxz@ahstu.edu.cn

Abstract:

The plant phosphatidyl ethanolamine-binding protein(PEBP)is divided into three subfamilies:MFT-like,FT-like,and TFL1-like. The FT and TFL1 subfamilies comprise the florigen-antiflorigen system of plants that regulate flowering time and plant architecture. Here,the PEBP gene family was identified by genome-wide identification of the whole genome data of the annual pepper (Capsicum annuum),and the structures of gene and protein,comparative evolution,collinearity and tissue expression profile were analyzed. The results showed that the C. annuum genome contains nine PEBP genes,including one MFT,four FT,and four TFL1 genes. All the nine PEBPgenes contain four exons and three introns,which are located on six chromosomes. Moreover,these nine PEBP proteins are located in the cytoplasm and nucleus. Comparative evolution analysis between C. annuum and Solanum lycopersicum showed that CaPEBP genes were subjected to purification selection during evolution. Among them,CaFT2 and CaFT4 were relatively stable during evolution;there were eight pairs of collinearity genes between pepper and tomato. The qRT-PCR expression profile ofCaPEBP genes were significantly differentially expressed in the tissues tested. For example,CaMFT/CaTFL1-1 was highly expressed in fruits,and CaFT1 had the highest relative expression level in leaves;the expression of CaFT3 was the highest in shoot apical meristem and flower,while CaTFL1-4 was specifically expressed in roots.

Key words: Capsicum annuum, florigen, PEBP gene family, genome-wide analysis, flowering regulation, gene expression

CLC Number: