抄録
Peanut (Arachis hypogaea L.) is a major oilseed and cash crop worldwide, but its yield and quality are often limited by drought and salt stress. Understanding the evolutionary features and functional mechanisms of stress-responsive genes is essential for developing stress-tolerant cultivars. The ASR (Abscisic acid, Stress and Ripening) gene family, which encodes plant-specific small molecular binding proteins, has been reported to play key roles in stress response and signal transduction in various crops. In this study, we conducted a genome-wide identification of the ASR gene family in peanut and characterized their evolutionary traits through analyses of physicochemical properties, gene structures, conserved domains, promoter cis-acting elements, and phylogenetic relationships. Transcriptome data under drought and salt treatments were further integrated to examine expression dynamics. The results showed that the peanut ASR gene family contains multiple members with high hydrophilicity and stability, structurally diverse yet evolutionarily conserved domains, and promoters enriched with cis-elements related to drought, ABA, and salt stress. Several members displayed marked tissue-specific induction under stress conditions, suggesting potential regulatory roles in environmental adaptation. Overall, our findings highlight the coexistence of evolutionary conservation and functional diversification within the peanut ASR gene family and underscore their transcriptional regulatory potential under abiotic stress, providing theoretical insights and genetic resources for elucidating stress-response mechanisms and advancing molecular breeding of stress-resilient peanut cultivars.
