Biotechnology Bulletin ›› 2022, Vol. 38 ›› Issue (11): 162-174.doi: 10.13560/j.cnki.biotech.bull.1985.2022-0321

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Identification of the ABC Gene Family and Expression Pattern Analysis During Flower Development in Cymbidium ensifolium

CAO Ying-hui1(), HU Mei-juan1, TONG Yan1, ZHANG Yan-ping1, ZHAO Kai2, PENG Dong-hui1, ZHOU Yu-zhen1()   

  1. 1. Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Arts College of Landscape Architecture,Fujian Agriculture and Forestry University,Fuzhou 350002
    2. College of Life Sciences,Fujian Normal University,Fuzhou 350117
  • Received:2022-03-14 Online:2022-11-26 Published:2022-12-01
  • Contact: ZHOU Yu-zhen E-mail:cyhfred0078@163.com;zhouyuzhencn@163.com

Abstract:

ATP-binding cassette(ABC)transporters are membrane transporter proteins that participate in the transportation of a huge range of substrates. Plant ABC genes function in many important biological processes of growth and development and abiotic stress resistance. We used bioinformatics methods to perform genome-wide identification of ABC gene family in Cymbidium ensifolium and analyze their expression patterns during flowering development based transcriptome data and RT-qPCR. In total,there were 121 ABC genes classified into 8 subfamilies in C. ensifolium genome. All ABC proteins had at least one conserved nucleotide binding domain(NBD). The 121 ABC genes were unevenly distributed on 19 chromosomes,and the most ABC genes located on chromosome 2 and 8. Tandem duplication was found to be the main reason for the expansion of the ABC genes. Cis-acting element prediction revealed that the promoter sequences of ABC genes contained phytohormone and abiotic stress responsive elements. The expressions of CeABCB6CeABCB30CeABCG3CeABCG54 and CeABCI7 were positively correlated with the volatilization of the key aromatic components in different flowering stages of the C. ensifolium. This study lays a foundation for further understanding the function of ABC genes and provides genetic resources for the study of C. ensifolium floral fragrance.

Key words: ABC transporters, Cymbidium ensifolium, genome-wide identification, gene expression pattern, flower development, floral fragrance