Genome-wide analysis of <i>PYL-PP2C-SnRK2s</i> family in <i>Camellia sinensis</i>

Abscisic acid (ABA) signaling regulates plant growth and development and participates in response to abiotic stressors. However, details about the <i>PYL-PP2C-SnRK2</i> gene family, which is the core component of ABA signaling in <i>Camellia sinensis</i>, are unknown. In this work, we identified 14 pyrabactin resistance-likes (<i>PYLs</i>), 84 type 2C protein phosphatase (<i>PP2Cs</i>), and 8 SNF1-related protein kinase 2s (<i>SnRK2s</i>) from <i>C. sinensis</i>. The transcriptomic analysis indicated that <i>PYL-PP2C-SnRK2s</i> were associated with changes of leaf color and the response of <i>C. sinensis</i> to drought and salt stressors. Changes of the expression of <i>Snrk2s</i> were not significant in the process of leaf color change or drought and salt stress response, suggesting that <i>PYLs</i> and <i>PP2Cs</i> may not interact with <i>SnRK2s</i> in <i>C. sinensis</i> during these processes. Finally, Gene Regulatory Network (GRN) construction and interaction networks analysis demonstrated that <i>PYLs</i> and <i>PP2Cs</i> were associated with multiple metabolic pathways during the changes of leaf color.