Hydrogen Peroxide and Vitexin in the Signaling and Defense Responses of <i>Passiflora incarnata</i> Under Drought Stress.

ABSTRACT: Hydrogen peroxide (H₂O₂) functions as a signaling molecule that triggers physiological and biochemical adjustments that help plants cope with environmental stress. This study evaluated the effects of foliar application of 1.5 mM H₂O₂ on the physiological and biochemical responses of Passiflora incarnata subjected to 14 days of drought stress followed by 5 days of rehydration. Drought reduced Fv/Fm and photochemical efficiency, as well as stomatal conductance and transpiration rates. H₂O₂ treatment under drought further reduced stomatal conductance and transpiration, suggesting enhanced water conservation. Drought-stressed plants treated with H₂O₂ exhibited increased concentrations of glucose, fru

SUBMITTER: Campos FG 

PROVIDER: S-EPMC12252318 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature