Evolution of pectin synthesis relevant galacturonosyltransferase gene family and its expression during cotton fiber development

Abstract Background Pectin is a key substance involved in cell wall development, and the galacturonosyltransferases (GAUTs) gene family critical participant pectin synthesis pathway. Systematic comprehensive research on GAUTs has not been performed cotton. Analysis of evolution expression patterns GAUT different cotton species needed to increase knowledge function fiber development. Results In this study, we have identified 131 genes genomes four Gossypium ( G. raimondii , barbadense hirsutum arboreum ), classified them as GAUT-A GAUT-B GAUT-C which coding probable galacturonosyltransferases. Among them, encode proteins GAUT1 GAUT15. All except for GAUT7 contain conserved glycosyl transferase 8 domain (H-DN-A-SVV-S-V-H-T-F). The sequence PLN (phospholamban) 02769 domain. According cis -elemet analysis, transcript levels may be regulated by hormones such JA, GA, SA, ABA, Me-JA, IAA. transcription upland lines with strength were analyzed. Peak level GhGAUT observed before 15 DPA. six materials high strength, concentrated from 10 DPA; while highest low detected between 5 These results lays foundation future during Conclusions affect including elongation thickening. lines, mainly participate elongation, whereas their major effect related both