Molecular and General Genetics MGG

, Volume 229, Issue 1, pp 129–136 | Cite as

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

  • Wolfgang K.F. Nacken
  • Peter Huijser
  • Jose-Pio Beltran
  • Heinz Saedler
  • Hans Sommer


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 deficiensglobiferamutant. 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 fill 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.

Key words

Antirrhinum majus Flower development MADS box factors Signal peptide Flower-specific genes 


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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Wolfgang K.F. Nacken
    • 1
  • Peter Huijser
    • 1
  • Jose-Pio Beltran
    • 2
  • Heinz Saedler
    • 1
  • Hans Sommer
    • 1
  1. 1.Max-Planck-Institut für ZüchtungsforschungKöln 30Federal Republic of Germany
  2. 2.CSICInstituto de Agroquimica y Tecnologia de AlimentosValenciaSpain

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