TY - JOUR
T1 - Temporal and spatial frameworks supporting plant responses to vegetation proximity
AU - Urdin-Bravo, Mikel
AU - Martín-Mur, Beatriz
AU - Moreno-Romero, Jordi
AU - Gomez-Cadenas, Aurelio
AU - Martínez-García, Jaume F.
AU - Esteve-Codina, Anna
AU - Palau-Rodriguez, Julia
AU - Paulisic, Sandi
AU - Kastanaki, Elizabeth
AU - Pastor-Andreu, Pedro
AU - Vives-Peris, Vicente
AU - Rodríguez-Villalón, Antía
N1 - Publisher Copyright:
© The Author(s) 2024. Published by Oxford University Press on behalf of American Society of Plant Biologists.
PY - 2024/8/14
Y1 - 2024/8/14
N2 - After the perception of vegetation proximity by phytochrome photoreceptors, shade-avoider plants initiate a set of responses known as the shade avoidance syndrome (SAS). Shade perception by the phytochrome B (phyB) photoreceptor unleashes the PHYTOCHROME INTERACTING FACTORs and initiates SAS responses. In Arabidopsis (Arabidopsis thaliana) seedlings, shade perception involves rapid and massive changes in gene expression, increases auxin production, and promotes hypocotyl elongation. Other components, such as phyA and ELONGATED HYPOCOTYL 5, also participate in the shade regulation of the hypocotyl elongation response by repressing it. However, why and how so many regulators with either positive or negative activities modulate the same response remains unclear. Our physiological, genetic, cellular, and transcriptomic analyses showed that (i) these components are organized into 2 main branches or modules and (ii) the connection between them is dynamic and changes with the time of shade exposure. We propose a model for the regulation of shade-induced hypocotyl elongation in which the temporal and spatial functional importance of the various SAS regulators analyzed here helps to explain the coexistence of differentiated regulatory branches with overlapping activities.
AB - After the perception of vegetation proximity by phytochrome photoreceptors, shade-avoider plants initiate a set of responses known as the shade avoidance syndrome (SAS). Shade perception by the phytochrome B (phyB) photoreceptor unleashes the PHYTOCHROME INTERACTING FACTORs and initiates SAS responses. In Arabidopsis (Arabidopsis thaliana) seedlings, shade perception involves rapid and massive changes in gene expression, increases auxin production, and promotes hypocotyl elongation. Other components, such as phyA and ELONGATED HYPOCOTYL 5, also participate in the shade regulation of the hypocotyl elongation response by repressing it. However, why and how so many regulators with either positive or negative activities modulate the same response remains unclear. Our physiological, genetic, cellular, and transcriptomic analyses showed that (i) these components are organized into 2 main branches or modules and (ii) the connection between them is dynamic and changes with the time of shade exposure. We propose a model for the regulation of shade-induced hypocotyl elongation in which the temporal and spatial functional importance of the various SAS regulators analyzed here helps to explain the coexistence of differentiated regulatory branches with overlapping activities.
KW - Arabidopsis
KW - Hy5
KW - Light
KW - Auxin biosynthesis
KW - Phytochrome-a
KW - Carotenoid biosynthesis
KW - Feedback-regulation
KW - Hypocotyl growth
KW - Transcription factor
KW - Shade-avoidance-response
UR - https://www.mendeley.com/catalogue/0647b0c1-39c5-384c-9695-b354f3d9cd9a/
UR - http://www.scopus.com/inward/record.url?scp=85208515361&partnerID=8YFLogxK
U2 - 10.1093/plphys/kiae417
DO - 10.1093/plphys/kiae417
M3 - Article
C2 - 39140970
AN - SCOPUS:85208515361
SN - 0032-0889
VL - 196
SP - 2048
EP - 2063
JO - Plant Physiology
JF - Plant Physiology
IS - 3
ER -