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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

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Summary

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 deficiens globiferamutant. 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.

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Author notes

  1. Wolfgang K.F. Nacken

    Present address: Department of Biochemistry, University of Oxford, South Parks Road, OX1 3QU, Oxford, UK

Authors and Affiliations

  1. Max-Planck-Institut für Züchtungsforschung, Carl-von-Linne-Weg 10, W-5000, Köln 30, Federal Republic of Germany

    Wolfgang K.F. Nacken, Peter Huijser, Heinz Saedler & Hans Sommer

  2. CSIC, Instituto de Agroquimica y Tecnologia de Alimentos, E-46010, Valencia, Spain

    Jose-Pio Beltran

Authors
  1. Wolfgang K.F. Nacken
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  2. Peter Huijser
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  3. Jose-Pio Beltran
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  4. Heinz Saedler
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  5. Hans Sommer
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Communicated by J. Schell

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Nacken, W.K., Huijser, P., Beltran, JP. et al. 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 . Molec. Gen. Genet. 229, 129–136 (1991). https://doi.org/10.1007/BF00264221

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  • DOI: https://doi.org/10.1007/BF00264221

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