Identification and expression analysis of CaPME gene family in pepper
[Objective]This study aimed to provide a reference for further understanding the role of the CaPME(Capsicum Pectin methylesterase)gene family in stress resistance and the development of new stress-resistant pepper varieties by investigating its gene composition and expression patterns.[Method]Bioinformatics methods were employed to identify and analyze the CaPME gene family.[Result]The pep-per genome contained a total of 64 members belonging to the CaPME gene family,all of which possessed a conserved Pectinesterase domain at the C-terminal,and some members have a PMEI domain at the N-terminal.The number of exons in the CaPME genes ranged from 1 to 6,with the majority of the gene struc-tures located in the N-terminal region.Except for CaPME16,CaPME39,and CaPME62,most members had a length of approximately 600 amino acids.Analysis of cis-acting elements revealed the presence of nu-merous response elements within the 2 000 bp sequence upstream of CaPME genes in pepper,including light-responsive,hormone-responsive,anaerobic induction,and low temperature-responsive elements.Sev-eral members of the CaPME gene family exhibited differential expression in anthers and ovaries,while some genes showed specific expression patterns under NaCl and cold stress conditions.[Conclusion]In this study,a total of 64 members of the CaPME gene family were identified,and specific expression patterns were observed in different tissues and under various abiotic stress conditions.
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