Hydrogen peroxide mediates high-intensity blue light-induced hypocotyl phototropism of cotton seedlings.

ABSTRACT: Phototropism is a classic adaptive growth response that helps plants to enhance light capture for photosynthesis. It was shown that hydrogen peroxide (H₂O₂) participates in the regulation of blue light-induced hypocotyl phototropism; however, the underlying mechanism is unclear. In this study, we demonstrate that the unilateral high-intensity blue light (HBL) could induce asymmetric distribution of H₂O₂ in cotton hypocotyls. Disruption of the HBL-induced asymmetric distribution of H₂O₂ by applying either H₂O₂ itself evenly on the hypocotyls or H₂O₂ scavengers on the lit side of hypocotyls could efficiently inhibit hypocotyl phototropic growth. Consistently, application of H_2</

SUBMITTER: Lv QY 

PROVIDER: S-EPMC10442013 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature