Genome-Wide Detection of SPX Family and Profiling of CoSPX-MFS3 in Regulating Low-Phosphate Stress in Tea-Oil Camellia

Camellia oleifera a member of the family Theaceae, is phosphorus (P) tolerator native to southern China. The SPX gene critically regulates plant growth and development maintains phosphate (Pi) homeostasis. However, involvement genes in Pi signaling Tea-Oil remains unknown. In this work, 20 were identified categorized into four subgroups. Conserved domains, motifs, structure, chromosomal location duplication events also investigated family. Defense stress responsiveness cis-elements promoters, which participated low-Pi responses. Based on transcriptome data qRT-PCR results, nine CoSPX had similar expression patterns eight (except CoPHO1H3) up-regulated at 30 days after exposure stress. CoSPX-MFS3 was selected as key candidate by WGCNA analysis. tonoplast protein. Overexpression Arabidopsis promoted accumulation total P content decreased anthocyanin content. could enhance tolerance increased biomass organic acid contents transgenic lines. Furthermore, seven starvation higher than those wild type. These results highlight novel physiological roles C. under stress, lays foundation for deeper knowledge response mechanism