Bradley D et al. 1993
- Authors:
Bradley D. Carpenter R. Sommer H. Hartley N. Coen E.
- Title:
Complementary floral homeotic phenotypes result from opposite orientations
of a transposon at the plena locus of Antirrhinum.
- Reference location:
Cell. 72(1):85-95, 1993 Jan 15.
- Abstract:
Recessive mutations at the plena (ple) locus result in a homeotic
conversion of sex organs to sterile perianth organs in flowers of
Antirrhinum majus. A complementary phenotype, in which sex organs replace
sterile organs, is conferred by semidominant ovulata mutations. The ple
locus was identified and isolated using a homologous gene, agamous from
Arabidopsis, as a probe. The expression of ple is normally restricted to
the inner two whorls of the flower, where sex organs develop. However, in
ovulata mutants, ple is expressed ectopically in the outer two whorls of
the flower and in vegetative organs. These mutants correspond to
gain-of-function alleles of ple, suggesting that ple is sufficient for
promoting sex organ development within the context of the flower. The
plena and ovulata phenotypes result from opposite orientations of the
transposon Tam3 inserted in the large intron of ple.
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