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Reference Detail
| Reference | ||
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| Author | Nagasawa,N., Miyoshi,M., Sano,Y., Satoh,H., Hirano,H., Sakai,H. and Nagato,Y. | |
| Title | SUPERWOMAN1 and DROOPING LEAF genes control floral organ identity in rice. | |
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Abstract: We analyzed recessive mutants of two homeotic genes in rice, SUPERWOMAN1 (SPW1) and DROOPING LEAF (DL). The homeotic mutation spw1 transforms stamens and lodicules into carpels and palea-like organs, respectively. Two spw1 alleles, spw1-1 and spw1-2, show the same floral phenotype and did not affect vegetative development. We show that SPW1 is a rice APETALA3 homolog, OsMADS16. In contrast, two strong alleles of the dl locus, drooping leaf-superman1 (dl-sup1) and drooping leaf-superman2 (dl-sup2), cause the complete transformation of the gynoecium into stamens. In these strong mutants, many ectopic stamens are formed in the region where the gynoecium is produced in the wild-type flower and they are arranged in a non-whorled, alternate pattern. The intermediate allele dl-1 (T65), results in an increase in the number of stamens and stigmas, and carpels occasionally show staminoid characteristics. In the weakest mutant, dl-2, most of the flowers are normal. All four dl alleles cause midrib-less drooping leaves. The flower of the double mutant, spw1 dl-sup, produces incompletely differentiated organs indefinitely after palea-like organs are produced in the position where lodicules are formed in the wild-type flower. These incompletely differentiated organs are neither stamens nor carpels, but have partial floral identity. Based on genetic and molecular results, we postulate a model of stamen and carpel specification in rice, with DL as a novel gene controlling carpel identity and acting mutually and antagonistically to the class B gene, SPW1. |
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| Journal | Development | |
| Country | Japan | |
| Volume | 130(4) | |
| Pages | 705-718 | |
| Year | 2003 | |
| PubMed ID | 12506001 | |
| PubMed Central ID | - | |
| DOI | 10.1242/dev.00294 | |
| URL | - | |
| Relation | ||
| Gene | DL SPW1 | |
| INSD | AF424549 | |
| Strain | Wild Core Collection | - |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
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Stages in Each Organ - Muant Lines (Gene) |
dl spw1 | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
