A combination of plasma membrane sterol biosynthesis and autophagy is required for shade-induced hypocotyl elongation.

ABSTRACT: Plant growth ultimately depends on fixed carbon, thus the available light for photosynthesis. Due to canopy light absorption properties, vegetative shade combines low blue (LB) light and a low red to far-red ratio (LRFR). In shade-avoiding plants, these two conditions independently trigger growth adaptations to enhance light access. However, how these conditions, differing in light quality and quantity, similarly promote hypocotyl growth remains unknown. Using RNA sequencing we show that these two features of shade trigger different transcriptional reprogramming. LB induces starvation responses, suggesting a switch to a catabolic state. Accordingly, LB promotes autophagy. In contrast, LRFR induced anabolism including expression of sterol biosynthesis genes in hypocotyls in a manner depende

SUBMITTER: Ince YC 

PROVIDER: S-EPMC9550796 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature