Genome-Wide Identification of Superoxide Dismutase and Expression in Response to Fruit Development and Biological Stress in : A Bioinformatics Study.

is a newly domesticated perennial fruit tree, and the lack of molecular research on stress resistance seriously affects its genetic improvement and commercial value development. Superoxide dismutase () can effectively eliminate the accumulation of reactive oxygen species (ROS) during the rapid growth of plant organs under biotic and abiotic stresses, maintaining a steady state of physiological metabolism. In this study, 13 consisting of two (), four () and seven () were identified in the genome. Structurally, the phylogeny, intron-exon pattern and motif sequences within these three subfamilies show high conservation. Evolutionarily, segmental/wide genome duplication (WGD) and dispersed duplication form the current profile of . Weighted gene coexpression network analysis (WGCNA) revealed the metabolic pathways of nine (69.2%) involved in fruit development, among which regulates fruit development and participates in the stress response. In addition, under the stress of multiple pathogens, six (46.6%) were continuously upregulated in the rinds of resistant lines; of these, three (, and ) were weakly or not expressed in susceptible lines. The results pave the way for theoretical research on and afford the opportunity for genetic improvement of .