Journal
PLANT CELL
Volume 25, Issue 10, Pages 3760-3769Publisher
AMER SOC PLANT BIOLOGISTS
DOI: 10.1105/tpc.113.115519
Keywords
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Funding
- SystemsX.ch initiative, Plant Growth in a Changing Environment
- Scuola Superiore Sant'Anna
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A plant's eventual size depends on the integration of its genetic program with environmental cues, which vary on a daily basis. Both efficient carbon metabolism and the plant hormone gibberellin are required to guarantee optimal plant growth. Yet, little is known about the interplay between carbon metabolism and gibberellins that modulates plant growth. Here, we show that sugar starvation in Arabidopsis thaliana arising from inefficient starch metabolism at night strongly reduces the expression of ent-kaurene synthase, a key regulatory enzyme for gibberellin synthesis, the following day. Our results demonstrate that plants integrate the efficiency of photosynthesis over a period of days, which is transduced into a daily rate of gibberellin biosynthesis. This enables a plant to grow to a size that is compatible with its environment.
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