Proteomic analysis of storage proteins in Phaseolus vulgaris associated with resistance to water stress

The common bean ( Phaseolus vulgaris), ), a widely consumed legume in Ecuador, boasts low economic value, significant nutritional contributions, and a remarkable capacity to enhance soil fertility. Despite these attributes, its field productivity often needs to improve, with the water deficit emerging as a primary hindrance. Consequently, genetic enhancements have been incorporated into select varieties, conferring tolerance to specific levels of water scarcity stress. This study aimed to elucidate the distinctions in protein expression patterns responding to water deficiency stress across nine bean varieties. Protein patterns were scrutinized through twodimensional polyacrylamide gel electrophoresis (2D-PAGE), and selected protein spots were subjected to mass spectrometry analysis (MALDI-TOF MS/RP-LC-MS/MS). A comprehensive identification of 111 proteins was achieved and categorized based on their respective functions. Noteworthy among these were the desiccationprotectant protein (LEA14) and Desiccation-related protein PCC13-62, identified as proteins associated with the response to abiotic stress, particularly prevalent in the INIAP_473 cultivar. These findings underscore the potential for targeted genetic improvements to mitigate the impact of water deficit stress on common bean cultivation, contributing to enhanced agricultural resilience and productivity.