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Kinase activity of OsBRI1 is essential for brassinosteroids to regulate rice growth and development.
- Source :
-
Plant science : an international journal of experimental plant biology [Plant Sci] 2013 Feb; Vol. 199-200, pp. 113-20. Date of Electronic Publication: 2012 Nov 10. - Publication Year :
- 2013
-
Abstract
- Brassinosteroids (BRs) are steroid hormones that participate in multiple biological processes. In this paper, we characterized a classic rice mutant Fn189 (dwarf54, d54) showing semi-dwarf stature and erect leaves. The coleoptile elongation and root growth was less affected in Fn189 than wild-type plant by the exogenous application of eBL, the most active form of BRs. Lamina joint inclination assay and morphological analysis in darkness further showed that Fn189 mutant plant was insensitive to exogenous eBL. Through map-based cloning, Fn189 was found to be a novel allelic mutant of the DWARF 61 (D61) gene, which encodes the putative BRs receptor OsBRI1. A single base mutation caused the I834F substitution in the OsBRI1 kinase domain. Consequently, kinase activity of OsBRI1 was found to decrease dramatically. Taken together, the kinase activity of OsBRI1 is essential for brassinosteroids to regulate normal plant growth and development in rice.<br /> (Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.)
- Subjects :
- Alleles
Amino Acid Sequence
Amino Acid Substitution
Brassinosteroids pharmacology
Chromosome Mapping
Cloning, Molecular
Cotyledon drug effects
Cotyledon enzymology
Cotyledon genetics
Cotyledon growth & development
Darkness
Gene Expression Regulation, Plant genetics
Molecular Sequence Data
Mutation
Oryza drug effects
Oryza genetics
Oryza growth & development
Phenotype
Plant Growth Regulators pharmacology
Plant Leaves drug effects
Plant Leaves enzymology
Plant Leaves genetics
Plant Leaves growth & development
Plant Roots drug effects
Plant Roots enzymology
Plant Roots genetics
Plant Roots growth & development
Protein Serine-Threonine Kinases genetics
Protein Structure, Tertiary
Seedlings drug effects
Seedlings enzymology
Seedlings genetics
Seedlings growth & development
Sequence Alignment
Brassinosteroids metabolism
Gene Expression Regulation, Developmental genetics
Oryza enzymology
Plant Growth Regulators metabolism
Protein Serine-Threonine Kinases metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2259
- Volume :
- 199-200
- Database :
- MEDLINE
- Journal :
- Plant science : an international journal of experimental plant biology
- Publication Type :
- Academic Journal
- Accession number :
- 23265324
- Full Text :
- https://doi.org/10.1016/j.plantsci.2012.10.011