Identification and expression of the FvPR10 gene family in strawberry (Fragaria vesca) and functional characterization of FvPR10-7
摘要
The PR10 protein (pathogenesis-related protein 10) represents a distinct branch within the broader PR protein family, known for its inducible expression in response to various fungal pathogens, thereby contributing to the plant’s defense mechanisms. This study identified and characterized 28 FvPR10 genes from the Fragaria vesca (F. vesca) genome. Phylogenetic analysis classified these genes into 4 subfamilies (PR10-I, II, III, and IV). Comprehensive bioinformatics analyses were conducted, encompassing evaluations of physicochemical properties, chromosomal localization, exon-intron distributions, structural domain arrangements, and subcellular localization patterns of the FvPR10 genes. Our findings revealed tissue-specific expression patterns for the FvPR10 genes, with their transcriptional activation observed in response to stress conditions. Notably, following inoculation with Colletotrichum gloeosporioides, several FvPR10 genes significantly elevated expression levels, peaking at 6 h post-inoculation (hpi). Among these genes, FvPR10-7 demonstrated particularly robust expression, especially when treated with salicylic acid (SA) or jasmonic acid (JA), implicating its pivotal role in defense responses. Moreover, the overexpression of FvPR10-7 in Arabidopsis thaliana (A. thaliana) conferred heightened resistance against Colletotrichum higginsianum, accompanied by upregulation of defense-related genes associated with the SA pathways. These results collectively suggest that FvPR10-7 orchestrates plant defense responses by modulating SA signaling pathways, thereby underscoring its significance in plant immunity against fungal pathogens.