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Abstract Background Small-secreted peptides are increasingly recognized as a novel class of intracellular signal molecules, playing crucial roles in plant growth and development. However, the precise role and mechanism governed by peptides containing Tyrosine Sulfation ( PSY ) are still under investigation. Currently, there is a lack of accessible information concerning the PSY gene family in wheat. Results Therefore, in this investigation, we identified 29 PSY genes in Triticum aestivum , with the aim of unraveling their significance in plant development processes and their response to a variety of stress conditions. Phylogenetic analysis showed that TaPSY genes clustered into five groups. Additionally, an analysis of the gene structure of TaPSYs displayed a conserved evolutionary path. The syntenic relationship demonstrated the 69 orthologous gene pairs in T. dicoccoides, Ae. tauschii , T. turgidum, and H. vulgare, respectively. Furthermore, the Ka/Ks analysis indicated that TaPSY genes have experienced purifying selection during their evolutionary processes. The promoters of TaPSY genes were found to contain numerous CAREs, and these elements are known to perform essential functions in various development processes, phytohormone responses, as well as defense and stress mechanisms. In addition, the identification of potential miRNAs targeting TaPSY genes was followed by an examination of their expression patterns across various tissues. Among the 29 TaPSY genes, twenty miRNAs were discovered to target eighteen of them. Moreover, TaPSY genes displayed a distinct expression across different tissues and stress conditions. Conclusions Hence, these discoveries offer a significant reference point for forthcoming molecular investigations and hold promise for bolstering wheat yield and stress resilience through targeted genetic enhancements and strategic breeding approaches. Graphical Abstract
Kesawat et al. (Tue,) studied this question.