Journal
DEVELOPMENTAL BIOLOGY
Volume 430, Issue 2, Pages 288-301Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ydbio.2017.03.024
Keywords
Flowering time; Hormone signaling; DELLA proteins; Transcriptional Regulation; Protein-protein interaction
Categories
Funding
- Cariplo Foundation through FLORIMAIZE project [AF 1301-006/FC 2013-1889]
- Ceres initiative of Fondazione Cariplo
- Agropolis Fondation
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The transition to flowering marks a key adaptive developmental switch in plants which impacts on their survival and fitness. Different signaling pathways control the floral transition, conveying both endogenous and environmental cues. These cues are often relayed and/or modulated by different hormones, which might confer additional developmental flexibility to the floral process in the face of varying conditions. Among the different hormonal pathways, the phytohormone gibberellic acid (GA) plays a dominant role. GA is connected with the other floral pathways through the GA-regulated DELLA proteins, acting as versatile interacting modules for different signaling proteins. In this review, I will highlight the role of DELLAs as spatial and temporal modulators of different consolidated floral pathways. Next, building on recent data, I will provide an update on some emerging themes connecting other hormone signaling cascades to flowering time control. I will finally provide examples for some established as well as potential cross-regulatory mechanisms between hormonal pathways mediated by the DELLA proteins.
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