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The phytohormone gibberellin (GA) has long been known to regulate the growth, development, and life cycle progression of flowering plants. However, the molecular GA-GID1-DELLA mechanism that enables plants to respond to GA has only recently been discovered. In addition, studies published in the last few years have highlighted previously unsuspected roles for the GA-GID1-DELLA mechanism in regulating growth response to environmental variables. Here, we review these advances within a general plant biology context and speculate on the answers to some remaining questions. We also discuss the hypothesis that the GA-GID1-DELLA mechanism enables flowering plants to maintain transient growth arrest, giving them the flexibility to survive periods of adversity.

Original publication

DOI

10.1105/tpc.109.066969

Type

Journal article

Journal

Plant Cell

Publication Date

05/2009

Volume

21

Pages

1328 - 1339

Keywords

Adaptation, Physiological, Arabidopsis, Arabidopsis Proteins, Gibberellins, Models, Biological, Plant Growth Regulators, Proteasome Endopeptidase Complex, Receptors, Cell Surface, Signal Transduction