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| 文献 | ||
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| 著者 | Nagasawa,N., Miyoshi,M., Sano,Y., Satoh,H., Hirano,H., Sakai,H. and Nagato,Y. | |
| タイトル | 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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| 掲載誌 | Development | |
| Country | Japan | |
| 刊数 | 130(4) | |
| ページ | 705-718 | |
| 発刊年 | 2003 | |
| PubMed ID | 12506001 | |
| PubMed Central ID | - | |
| DOI | 10.1242/dev.00294 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | DL SPW1 | |
| INSD | AF424549 | |
| 系統 |
野生イネ コアコレクション |
- |
| 突然変異系統(遺伝研 Collection) | - | |
| 種子不稔系統 | - | |
| 致死変異体系統 | - | |
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組織別発生段階 - 突然変異系統(遺伝子) |
dl spw1 | |
| 栽培イネ品種(遺伝研 Collection) | - | |
| 組織別発生段階 | - | |
