Identification and Analysis of the WOX Gene Family in Prunus persica
The WOX gene family is a plant specific transcription factor,which regulates plant growth and develop-ment,plant embryo development,hormone signal transduction,anti-adverse metabolism and other functions.In this study,WOX gene family in the whole peach genome was identified and biologically analyzed for the first time using the whole-genome data of peach.The results showed that:there are 67 members of the peach WOX gene family,which are distributed on 8 chromosomes.The amino acid number,molecular weight and isoelectric point of different members vary greatly.Most WOX proteins are rich in acidic amino acids and have poor stability,and all WOX members are hydrophilic proteins;the secondary structure of peach WOX protein consists of four parts:a-helix,β-sheet,extended strand and random coil;97%of the members of the peach WOX gene family are localized in the nucleus.The peach WOX gene family was divided into three groups by phylogenetic tree.Only group Ⅰ contained 40 PpWOX proteins and 15 Arabidopsis WOX proteins,while the other two groups had no Arabidopsis WOX proteins;all the peach WOX gene structures contained exon and intron structures,but the number of them varies greatly.The conserved motif analysis showed that there were 10 conserved motifs(motif 1~motif 10)and all WOX members contained motif;the number and types of motifs in the same branch were more similar,while there were specific motifs among different branches,which was consistent with phylogenetic tree analysis.The results of this study will provide some basic data and reference for further analysis of the application of each member of WOX gene family in the growth and development of peach and stress resistance.