Nakcen WK et al. 1991
- Authors:
Nacken WK. Huijser P. Beltran JP. Saedler H. Sommer H.
- Title:
Molecular characterization of two stamen-specific genes, tap1 and fil1,
that are expressed in the wild type, but not in the deficiens mutant of
Antirrhinum majus.
- Reference location:
Molecular & General Genetics. 229(1):129-36, 1991 Sep.
- Abstract:
Deficiens, a homeotic gene involved in the genetic control of flower
development, codes for a putative transcription factor. Upon mutation of
the gene, petals are transformed to sepals and stamens to carpels,
indicating that deficiens is essential for the activation of genes
required for petal and stamen formation. In a search for putative target
genes of deficiens, several stamen- and petal-specific genes were cloned
that are expressed in wild type but not in the deficiensglobifera mutant.
In this report the molecular characterization of two of these genes, tap1
and fil1, is presented. They are transiently expressed during flower
development. In situ hybridization data demonstrate that tap1 is expressed
in the tapetum of the anthers and fil1 in the filament of the stamen and
at the bases of the petals. Both genes encode small proteins with
N-terminal hydrophobic domains suggesting that they are secreted. We
discuss possible functions of the gene products and their relationship to
the deficiens gene.
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