GENOMES UNCOUPLED1 plays a key role during the de-etiolation process in Arabidopsis.

ABSTRACT: One of the most dramatic challenges in the life of a plant occurs when the seedling emerges from the soil and exposure to light triggers expression of genes required for establishment of photosynthesis. This process needs to be tightly regulated, as premature accumulation of light-harvesting proteins and photoreactive Chl precursors causes oxidative damage when the seedling is first exposed to light. Photosynthesis genes are encoded by both nuclear and plastid genomes, and to establish the required level of control, plastid-to-nucleus (retrograde) signalling is necessary to ensure correct gene expression. We herein show that a negative GENOMES UNCOUPLED1 (GUN1)-mediated retrograde signal restricts chloroplast development in darkness and during early light response by regulating the transcr

SUBMITTER: Hernandez-Verdeja T 

PROVIDER: S-EPMC9324965 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature