UV RESISTANCE LOCUS 8 signalling enhances photosynthetic resilience to herbicide-induced damage in Arabidopsis thaliana.

ABSTRACT: Perception of low irradiance ultraviolet B (UV-B) light (280-315 nm) by the UV RESISTANCE LOCUS 8 (UVR8) photoreceptor initiates signalling pathways that enhance plant defences to UV-B damage, mitigating the effects of higher photon irradiances. We therefore questioned whether UVR8 signalling could also prime plants against herbicide-induced damage, promoting postspray survival. We assessed the effects of a 2 d, low irradiance UV-B pretreatment on the photosynthetic resilience and survival of Arabidopsis thaliana plants treated with herbicides promoting photosynthetic disruption and oxidative stress. UV-B acclimation increased leaf carotenoid production, antioxidant activity and nonphotochemical quenching (NPQ) and delayed herbicide-induced reductions in electron transport rate (ETR), faci

SUBMITTER: Groves CL 

PROVIDER: S-EPMC12267928 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature