Related Experiment Video
Updated: Jun 9, 2026

A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response
Published on: April 17, 2016
Plant hormone signaling lightens up: integrators of light and hormones
1Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06520-8104, USA.
Abstract:
Light is an important environmental signal that regulates diverse growth and developmental processes in plants. In these light-regulated processes, multiple hormonal pathways are often modulated by light to mediate the developmental changes. Conversely, hormone levels in plants also serve as endogenous cues in influencing light responsiveness. Although interactions between light and hormone signaling pathways have long been observed, recent studies have advanced our understanding by identifying signaling integrators that connect the pathways. These integrators, namely PHYTOCHROME-INTERACTING FACTOR 3 (PIF3), PIF4, PIF3-LIKE 5 (PIL5)/PIF1 and LONG HYPOCOTYL 5 (HY5), are key light signaling components and they link light signals to the signaling of phytohormones, such as gibberellin (GA), abscisic acid (ABA), auxin and cytokinin, in regulating seedling photomorphogenesis and seed germination. This review focuses on these integrators in illustrating how light and hormone interact.
Related Concept Videos
Plant Hormones
Plant Hormones
Cell Signaling in Plants
Photoreceptors and Plant Responses to Light
Biological Clocks and Seasonal Responses
Short-distance Transport of Resources

