AUTHOR=Yang Xuanshong , Yuan Jiazheng , Luo Wenbin , Qin Mingyue , Yang Jiahan , Wu Weiren , Xie Xiaofang 

TITLE=Genome-Wide Identification and Expression Analysis of the Class III Peroxidase Gene Family in Potato (Solanum tuberosum L.)

JOURNAL=Frontiers in Genetics

VOLUME=11

YEAR=2020

URL=https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2020.593577

DOI=10.3389/fgene.2020.593577

ISSN=1664-8021

ABSTRACT=<p>Class III peroxidases (PRXs) are plant-specific enzymes and play important roles in plant growth, development and stress response. In this study, a total of 102 non-redundant <italic>PRX</italic> gene members (<italic>StPRXs</italic>) were identified in potato (<italic>Solanum tuberosum</italic> L.). They were divided into 9 subfamilies based on phylogenetic analysis. The members of each subfamily were found to contain similar organizations of the exon/intron structures and protein motifs. The <italic>StPRX</italic> genes were not equally distributed among chromosomes. There were 57 gene pairs of segmental duplication and 26 gene pairs of tandem duplication. Expression pattern analysis based on the RNA-seq data of potato from public databases indicated that <italic>StPRX</italic> genes were expressed differently in various tissues and responded specifically to heat, salt and drought stresses. Most of the <italic>StPRX</italic> genes were expressed at significantly higher levels in root than in other tissues. In addition, real-time quantitative PCR (qRT-PCR) analysis for 7 selected <italic>StPRX</italic> genes indicated that these genes displayed various expression levels under abiotic stresses. Our results provide valuable information for better understanding the evolution of <italic>StPRX</italic> gene family in potato and lay the vital foundation for further exploration of <italic>PRX</italic> gene function in plants.</p>