SLR1 inhibits MOC1 degradation to coordinate tiller number and plant height in rice.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31227696.
- Also identified by DOI 10.1038/s41467-019-10667-2 and PMC identifier 6588547.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The breeding of cereals with altered gibberellin (GA) signaling propelled the 'Green Revolution' by generating semidwarf plants with increased tiller number. The mechanism by which GAs promote shoot height has been studied extensively, but it is not known what causes the inverse relationship between plant height and tiller number. Here we show that rice tiller number regulator MONOCULM 1 (MOC1) is protected from degradation by binding to the DELLA protein SLENDER RICE 1 (SLR1). GAs trigger the degradation of SLR1, leading to stem elongation and also to the degradation of MOC1, and hence a decrease in tiller number. This discovery provides a molecular explanation for the coordinated control of plant height and tiller number in rice by GAs, SLR1 and MOC1.
Medical subject headings
- Gene Expression Regulation, Plant
- Gibberellins
- Oryza
- Plant Proteins
- Plant Shoots