Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (1): 1-14.doi: 10.16420/j.issn.0513-353x.2021-0932

• Research Papers •     Next Articles

Genome-wide Identification of Peach SAUR Gene Family and Characterization of PpSAUR5 Gene

ZHAI Hanhan1,*, ZHAI Yujie1,*, TIAN Yi2(), ZHANG Ye1, YANG Li1, WEN Zhiliang1,**(), CHEN Haijiang1,**()   

  1. 1College of Horticultural,Hebei Agricultural University,Baoding,Hebei 071000,China
    2Mountainous Areas Research Institute,Nation Engineering Reserch Center for Agricuture in Northern Mountainous Region,Hebei Agricultural University,Baoding,Hebei 071001,China
  • Received:2022-07-15 Revised:2022-11-16 Online:2023-01-25 Published:2023-01-18
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To explore the functions of SAUR(Small Auxin-up RNA)gene family in plant growth and development,bioinformatics methods were used to identify the SAUR genes in peach(Prunus persica). The chromosome location,gene structure,evolutionary relationship and gene expression were analyzed,and the function of PpSAUR5 was verified through transgenic method. A total of 80 PpSAUR members were identified and divided into 12 subgroups,which were unevenly distributed on the eight chromosomes. The analysis of gene structure showed that 75 PpSAUR genes contained only one exon,and five genes contained two to three exons. Eighteen SAUR genes were found to be associated with tree growth through RNA-seq analysis. These genes exhibited different expression patterns in response to exogenous hormone.Among them,PpSAUR5 was induced by both IAA and GA. PpSAUR5 transgenic Arabidopsis exhibited longer petiole,hypocotyl,root,and less sensitivity to NAA and 2,4-D treatment than wild-type. The results indicated that PpSAUR5 functioned to promote organ elongation.

Key words: peach, SAUR gene family, identification, gene expression

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