Stamina pistilloida, the Pea Ortholog of Fim and UFO, Is Required for Normal Development of Flowers, Inflorescences, and Leaves
Open Access
- 1 January 2001
- journal article
- Published by Oxford University Press (OUP) in Plant Cell
- Vol. 13 (1), 31-46
- https://doi.org/10.1105/tpc.13.1.31
Abstract
Isolation and characterization of two severe alleles at the Stamina pistilloida (Stp) locus reveals that Stp is involved in a wide range of developmental processes in the garden pea. The most severe allele, stp-4, results in flowers consisting almost entirely of sepals and carpels. Production of ectopic secondary flowers in stp-4 plants suggests that Stp is involved in specifying floral meristem identity in pea. The stp mutations also reduce the complexity of the compound pea leaf, and primary inflorescences often terminate prematurely in an aberrant sepaloid flower. In addition, stp mutants were shorter than their wild-type siblings due to a reduction in cell number in their internodes. Fewer cells were also found in the epidermis of the leaf rachis of stp mutants. Examination of the effects of stp-4 in double mutant combinations with af, tl, det, and veg2-2—mutations known to influence leaf, inflorescence, and flower development in pea—suggests that Stp function is independent of these genes. A synergistic interaction between weak mutant alleles at Stp and Uni indicated that these two genes act together, possibly to regulate primordial growth. Molecular analysis revealed that Stp is the pea homolog of the Antirrhinum gene Fimbriata (Fim) and of UNUSUAL FLORAL ORGANS (UFO) from Arabidopsis. Differences between Fim/UFO and Stp mutant phenotypes and expression patterns suggest that expansion of Stp activity into the leaf was an important step during evolution of the compound leaf in the garden pea.Keywords
This publication has 31 references indexed in Scilit:
- Ubiquitin-dependent degradation of multiple F-box proteins by an autocatalytic mechanismProceedings of the National Academy of Sciences, 1999
- Dual role for fimbriata in regulating floral homeotic genes and cell division in AntirrhinumThe EMBO Journal, 1997
- The relationship between genetic and cytogenetic maps of pea. II. Physical maps of linkage mapping populationsGenome, 1997
- UNIFOLIATA regulates leaf and flower morphogenesis in peaCurrent Biology, 1997
- SKP1 Connects Cell Cycle Regulators to the Ubiquitin Proteolysis Machinery through a Novel Motif, the F-BoxCell, 1996
- Expression of floricaula in single cell layers of periclinal chimeras activates downstream homeotic genes in all layers of floral meristemsDevelopment, 1995
- Fimbriata controls flower development by mediating between meristem and organ identity genesCell, 1994
- Genetic interactions among floral homeotic genes of ArabidopsisDevelopment, 1991
- Genetic Control of Flower Development by Homeotic Genes in Antirrhinum majusScience, 1990
- Stamina pistilloida: a new mutation induced in peaTheoretical and Applied Genetics, 1969