Abstract
Cytochrome P450s (CYPs) constitute the largest group of enzymes in plants and are involved in a variety of processes related to growth and protection. However, the CYP gene superfamily in pear (Pyrus bretschneideri) and their characteristics is unclear. Through a comprehensive genome-wide analysis, this article identified a total of 74 CYP genes in the P. bretschneideri genome, which were categorized into fourteen families. Motif analysis reveals that most of the ten motifs predicted were with the p450 conserved domain. The majority of the CYP genes have exon arrangements. Furthermore, promoter analysis unveiled a multitude of cis-acting elements associated with diverse responsiveness including hormones, light responsive, anoxic specific inducibility and anaerobic induction. Analysis of the transcriptome data reveal that about 80% of the pear CYPs genes were upregulated and they were positively correlated with the antioxidant's parameters such as total flavonoids and total phenol content as well as ABTS and DPPH radicals. RT-qPCR analysis confirmed that the CYP genes could be regulated in pear. Collectively, our results reveal comprehensive insights into the CYP superfamily in pear and make a valuable contribution to the ongoing process of functional validation.
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