Tools - Reference - Detail

Reference Detail

Reference
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.
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.
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 -
Lethal Embryo
Mutantion Strain
-
Stages in Each Organ
- Muant Lines (Gene)
dl spw1
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase