Physiological Responses of Tomato Plants with Varied Susceptibility to Multiple Drought Stress.

ABSTRACT: Frequent extreme weather events exacerbate agricultural abiotic stress, with drought causing widespread yield loss. Tomato, a globally important vegetable sensitive to water deficit, has been predominantly studied under single-drought scenarios that poorly reflect recurrent field conditions. This study investigated physiological and molecular responses of two tomato genotypes to repeated drought stress. Results showed that the drought-sensitive genotype 'TGTB' exhibited faster ABA accumulation and more pronounced ABA-mediated stomatal closure. During the second drought cycle, stomatal pore length and width were significantly smaller than during the first drought, indicating a strong stress memory effect. In contrast, the drought-tolerant 'LA1598' showed minimal memory responses. Under extr

SUBMITTER: Chen H 

PROVIDER: S-EPMC12729441 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature