The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.
SUPERWOMAN1 and DROOPING LEAF genes control floral organ identity in rice
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 riceAPETALA3 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 DLas a novel gene controlling carpel identity and acting mutually and antagonistically to the class B gene, SPW1.
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Self-citation
Metadata
- Authors
- Nagasawa, N., Miyoshi, M., Sano, Y., Satoh, H., Hirano, H., Sakai, H., & Nagato, Y.
- Venue
- Development
- Publisher
- The Company of Biologists
- Published
- 2003-02-15
- Volume
- 130
- Issue
- 4
- Pages
- 705-718
- ISSN
- 0950-1991 (ISSN-L)
- 1477-9129
- OpenAlex
- W1978339777
- Cited by
- 416
- References
- 36
- FWCI
- 19.88
- Type
- journal article
- Language
- en
- Open access
- closed
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