Genome-wide identification of PP2A gene family in reveals the potential role of in abiotic stress.

BACKGROUND

Protein phosphatases (PP) play a crucial role in regulation of physiological response to various environmental stimuli in plants. Protein phosphatase 2A (PP2A) are a class of Ser/Thr protein phosphatases which are present widely across plant species and facilitate plant responses to biotic and abiotic stresses, and hormone treatment.

METHODS

Using BLASTp, tea PP2A genes were found and their physicochemical characteristics (ExPASy), subcellular localization, and intron-exon structure (GSDS) were described. MEGA software was used to examine phylogenetic relationships, SMART online tool to analyze conserved domains, and PlantCARE tool to analyze cis-elements. The Heatmapper online tool was used to visualize expression profiles across plant tissues and stress conditions. Under controlled conditions, 2-year-old plants were exposed to methyl jasmonate (MeJA) stress treatments, cold drought, and salt stresses and qRT-PCR (2 technique, CsACTIN as internal control) was used to validate the results.

RESULTS

We found 11 PP2A genes in () through a genome-wide search wherein was taken as the reference genome. Further, a systematic study was conducted wherein physicochemical properties, phylogeny, gene structure and gene expression were explored. Analysis of cis-elements, gene ontology, and expression patterns of genes under various stresses, combined with prior research on the PP2A gene family in other plants, suggests that the PP2A family plays a role in regulating phytohormone (auxin, salicylic acid, gibberellin, abscisic acid, MeJA) responses during stress in . The real time PCR also confirmed the potential role of (TEA018948.1) gene in abiotic stress responses.

CONCLUSION

This study offers potential goals for further in-depth investigation and functional analysis, alongside enhancing our understanding of the regulatory network of PP2A genes in .