Molecular and Physiological Responses to Light in Fruit Tree Systems

Light is the primary energy source for photosynthesis and for delivery instructional signal governing fruit trees complex life cycle. Perception of light quality in woody perennials triggers physiological and developmental responses mediated by photoreceptors such as phytochromes and cryptochromes. These photoreceptors are light-sensitive proteins, operating as sensors of the surrounding environment, modelling the plant architecture, influencing i.e. branching, canopy density and flowering induction, and playing a role of architect that balances between vegetative growth and reproductive development. Understanding how light quality controls the transition from youth to adult phase highlighted by the event of the floral induction, as also by many ontogenetic plant events and fruit kinetics of metabolic quality and ripening it is the challenge. This Research Topic explores the multifaceted roles of light in fruit tree species, with an emphasis on spectral management to optimize canopy architecture and fruit traits. Deciphering the functions of light quality is therefore strategic for improving productivity and resilience in cultivation systems facing climate change.The primary objective of this collection is to provide a comprehensive synthesis of how light-mediated signaling influences the ontogeny and productivity of fruit tree species. By bridging the gap between molecular photobiology and horticultural practice, this collection aims to elucidate how photoreceptor activity coordinates the transition from juvenility to reproductive maturity. Furthermore, we seek to highlight innovative research on how modulating light quality can manipulate plant architecture and enhance the organoleptic properties of fruit during ripening. Ultimately, this collection aims to offer a strategic roadmap for integrating spectral precision into modern orchard management, fostering sustainable and high-quality fruit production.This Research Topic aims to consolidate cutting-edge research on the interplay between light signaling and the developmental physiology of fruit trees. We invite authors to submit original research, reviews, and perspectives that address the following four core areas:• Photoreceptor Mechanisms and Signaling Pathways: Contributions focusing on the molecular characterization of phytochromes, cryptochromes, phototropins, members of the Zeitlupe family and UV-B receptors, and their role in translating light quality physical information into physiological responses within woody plants.• Light-Driven Architectural Modelling: Studies investigating how spectral composition influences tree morphology, including apical dominance, branching patterns, and canopy structure, to optimize light interception and orchard efficiency.• Phase Transitions and Reproductive Development: Research exploring the impact of light on the transition from juvenile to adult, addressing the flowering induction and the synchronization of floral development.• Photobiology of Fruit Ripening and Quality: Investigations into how light quality regulates metabolic pathways during fruit maturation, nutritional content, and post-harvest resilience. Topic editors: Ivano Forgione, Rosario Muleo Source: https://www.frontiersin.org/research-topics/78659/molecular-and-physiological-responses-to-light-in-fruit-tree-systems