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Natural selection of a GSK3 determines rice mesocotyl domestication by coordinating strigolactone and brassinosteroid signaling.
- Source :
-
Nature communications [Nat Commun] 2018 Jun 28; Vol. 9 (1), pp. 2523. Date of Electronic Publication: 2018 Jun 28. - Publication Year :
- 2018
-
Abstract
- Mesocotyl is the crucial organ for pushing buds out of deep water or soil after germination in monocots. Deep direct seeding or mechanized dry seeding cultivation practice requires rice cultivars having long mesocotyl. However, the mechanisms of mesocotyl elongation and domestication remain unknown. Here, our genome-wide association study (GWAS) reveals that natural variations of OsGSK2, a conserved GSK3-like kinase involved in brassinosteroid signaling, determine rice mesocotyl length variation. Variations in the coding region of OsGSK2 alter its kinase activity. It is selected for mesocotyl length variation during domestication. Molecular analyses show that brassinosteroid-promoted mesocotyl elongation functions by suppressing the phosphorylation of an U-type cyclin, CYC U2, by OsGSK2. Importantly, the F-box protein D3, a major positive component in strigolactone signaling, can degrade the OsGSK2-phosphorylated CYC U2 to inhibit mesocotyl elongation. Together, these results suggest that OsGSK2 is selected to regulate mesocotyl length by coordinating strigolactone and brassinosteroid signaling during domestication.
- Subjects :
- Domestication
F-Box Proteins genetics
F-Box Proteins metabolism
Germination genetics
Glycogen Synthase Kinase 3 metabolism
Lactones metabolism
Oryza growth & development
Oryza metabolism
Plant Proteins metabolism
Plant Stems anatomy & histology
Plant Stems growth & development
Plant Stems metabolism
Seedlings genetics
Seedlings growth & development
Seedlings metabolism
Seeds genetics
Seeds growth & development
Seeds metabolism
Selection, Genetic
Signal Transduction
Uracil-DNA Glycosidase genetics
Uracil-DNA Glycosidase metabolism
Brassinosteroids metabolism
Gene Expression Regulation, Plant
Genome, Plant
Glycogen Synthase Kinase 3 genetics
Oryza genetics
Plant Proteins genetics
Plant Stems genetics
Subjects
Details
- Language :
- English
- ISSN :
- 2041-1723
- Volume :
- 9
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nature communications
- Publication Type :
- Academic Journal
- Accession number :
- 29955063
- Full Text :
- https://doi.org/10.1038/s41467-018-04952-9