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Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (7): 1458-1472.doi: 10.16420/j.issn.0513-353x.2021-0351

• Research Papers • Previous Articles     Next Articles

Expression Characteristics and Functional Analysis of FvYABBY5.1 in Strawberry

CAI Jianfa1,2, MO Xuelian2,3, GUAN Sicong1,2, CHEN Xu2, XUE Cheng1,*()   

  1. 1College of Hoticulture,Fujian Agriculture and Forestry University,Fuzhou 350002,China
    2Horticultural Plant Biology and Metabolomics Center,Haixia Institute of Science and Technology,Fujian Agriculture and Forestry University,Fuzhou 350002,China
    3College of Life Sciences,Fujian Agriculture and Forestry University,Fuzhou 350002,China
  • Received:2021-12-16 Revised:2022-03-07 Online:2022-07-25 Published:2022-07-29
  • Contact: XUE Cheng E-mail:xcheng@sdau.edu.cn

Abstract:

A total of five YABBY genes were identified from woodland strawberry(Fragaria vesca‘Hawaii 4’). Based on phylogenetic tree analysis of YABBY gene in rosaceous plant,those YABBY genes were divided into five subfamilies:INO,YAB2,YAB3,CRC and YAB5. Gene structure analysis showed that exon and intron number of YABBY genes were different in the five sub-family,but were insignificantly different in the same subfamily. And the dispersion of protein motifs was little difference among all YABBY members. These results suggest that the function of YABBY genes were conservative in strawberry. Expression profile analysis showed that the expression level of FvYAB5.1 gene in dormant buds and non-dormant buds of strawberry runner was significantly different. In transgenic Arabidopsis thaliana,we found that overexpression FvYAB5.1 leaded to curly leaf shape,dwarf phenotype and delayed flowering time. The expression levels of SHOOT MERISTEMLESSSTM)and KNAT2,which regulate shoot apical meristem(SAM)development,were significantly inhibited. Meanwhile,the transcriptional expression levels of auxin and cytokinin-related genes AtARF5,AtARR4 and AtIPT7 were significantly increased,while the transcriptional expression levels of AtARR7 and AtARR15 were significantly repressed. In summary,we speculate that FvYAB5.1 gene may be involved in the development of SAM in strawberry runner by regulating the antagonistic relationship between cytokinin and auxin,leading to the alternating growth of dormant and non-dormant buds in the runner.

Key words: Fragaria vesca, YABBY, runner, shoot apical meristem

CLC Number: