Chinese Bulletin of Botany ›› 2023, Vol. 58 ›› Issue (4): 548-559.DOI: 10.11983/CBB22147

• EXPERIMENTAL COMMUNICATIONS • Previous Articles     Next Articles

Genome-wide Identification and Analysis of PLATZ Transcription Factor Gene Family in Foxtail Millet

Rong Sun1, Yulu Yang2, Yajun Li2, Hui Zhang1, Xukai Li1()   

  1. 1. College of Life Sciences, Shanxi Agricultural University, Jinzhong 030801, China
    2. College of Agriculture, Shanxi Agricultural University, Jinzhong 030801, China
  • Received:2022-07-05 Accepted:2022-10-09 Online:2023-07-01 Published:2022-11-02
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Abstract: The PLATZ transcription factor family is a class of plant-specific zinc-dependent DNA-binding proteins that play an indispensable role in plant growth and development and stress resistance. However, the PLATZ family genes have not been systematically analyzed in foxtail millet (Setaria italica). In this study, 17 PLATZ genes in the foxtail millet genome were identified and systematically named. The SiPLATZ genes were divided into five subfamilies by phylogenetic analysis, and members of the same subfamily have similar gene structures and motifs. Cis-acting element analysis demonstrated that the SiPLATZ genes may play a role in endosperm development and various stress-resistant responses. The Ka/Ks ratio analysis indicates that duplicated genes are subject to purifying selection. There were significant differences in the expression of SiPLATZ genes in different tissues and developmental stages, which were mainly divided into two categories: high expression in roots, leaves, and stems, and in spikes and seeds. This reflects the complexity of the physiological functions of SiPLATZ genes and their possible involvement in regulating seed growth and multiple stress responses. In addition, the co-expression network constructed in combination with WGCNA analysis revealed that SiPLATZ6, SiPLATZ8, SiPLATZ9 and SiPLATZ11 may be the candidates for genetic improvement of foxtail millet yield and functional gene research. These results lay the foundation for further studies on the biological functions of PLATZ transcription factors in foxtail millet growth and development.

Key words: PLATZ, foxtail millet, genome-wide identification, tissue specific expression, WGCNA