| Gypsy embryo specifies ovule curvature by regulating ovule/integument development in rice. | |
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MedLine Citation:
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PMID: 16001259 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The embryo position in a seed is stable in most plant species, indicating the existence of a strict regulatory mechanism that specifies the embryo position in the seed. To elucidate this mechanism, we analyzed the gypsy embryo (gym) mutant of rice, in which the position of the mature embryo in the seed is altered at a low frequency. Analyses of early embryogenesis and ovule development showed that the ectopic embryo was derived from an ill-positioned egg cell, which resulted from the incomplete curvature of the ovule. Although the development of both the inner and outer integuments was impaired, the ovule curvature was associated closely with the extent of inner integument growth. Therefore, inner integument development controls ovule curvature in rice. The expression patterns of OSH1 and OsMADS13 indicated that, in gym, a small number of indeterminate cells are maintained on the style side of the ovule and then in the integument primordium at a low frequency. The prolonged survival of these indeterminate cells disturbs normal integument development. The gym fon2 double mutant suggests that GYM and FON2 are involved redundantly in floral meristem determinacy. Possible functions of the GYM gene and the ovule developmental mechanism are discussed. |
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Authors:
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S Yamaki; H Satoh; Y Nagato |
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Publication Detail:
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Type: Journal Article Date: 2005-07-07 |
Journal Detail:
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Title: Planta Volume: 222 ISSN: 0032-0935 ISO Abbreviation: Planta Publication Date: 2005 Oct |
Date Detail:
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Created Date: 2005-10-17 Completed Date: 2006-01-12 Revised Date: 2006-07-25 |
Medline Journal Info:
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Nlm Unique ID: 1250576 Medline TA: Planta Country: Germany |
Other Details:
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Languages: eng Pagination: 408-17 Citation Subset: IM |
Affiliation:
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Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo 113-8657, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Gene Expression Profiling Gene Expression Regulation, Developmental Gene Expression Regulation, Plant Homeodomain Proteins / genetics, metabolism MADS Domain Proteins / genetics, metabolism Mutation Oryza sativa / cytology, embryology*, genetics Phenotype Plant Proteins / genetics, metabolism Seeds / anatomy & histology, cytology, embryology*, genetics Trans-Activators / genetics, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Homeodomain Proteins; 0/MADS Domain Proteins; 0/OSH1 protein, Oryza sativa; 0/Plant Proteins; 0/Trans-Activators |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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