Genome-Wide Identification of the Peanut Gene Family and Its Expression Analysis under Abiotic Stress.

Peanut ( L.) is one of the most important oil and food legume crops worldwide. (abscisic acid, stress, ripening) plays extremely important roles in plant growth and development, fruit ripening, pollen development, and stress. Here, six genes were identified in peanut. Structural and conserved motif analyses were performed to identify common ABA/WDS structural domains. The vast majority of genes encoded acidic proteins, all of which are hydrophilic proteins and localized on mitochondria and nucleus, respectively. The cis-element analysis revealed that some cis-regulatory elements were related to peanut growth and development, hormone, and stress response. Under normal growth conditions, and were expressed in all tissues of peanut plants. Quantitative real-time PCR (qRT-PCR) results indicated that peanut genes exhibited complex expression patterns in response to abiotic stress. Notably, under drought and cadmium (Cd) stress, the expression levels of and were significantly upregulated, suggesting that these genes may play a crucial role in the peanut plant's resistance to such stressors. These results provide a theoretical basis for studying the evolution, expression, and function of the peanut gene family and will provide valuable information in the identification and screening of genes for peanut stress tolerance breeding.