NDLI: Floral homeotic genes were recruited from homologous MADS-box genes preexisting in the common ancestor of ferns and seed plants.

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Floral homeotic genes were recruited from homologous MADS-box genes preexisting in the common ancestor of ferns and seed plants.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Münster, T. Theissen, G. Saedler, H. Kim, J. T. Pahnke, J. Martin, W. Di Rosa, A.
Description	Author Affiliation: Münster T ( Max Planck Institute for Breeding Research, Division of Molecular Plant Genetics, Cologne, Germany.);
Abstract	Flowers sensu lato are short, specialized axes bearing closely aggregated sporophylls. They are typical for seed plants (spermatophytes) and are prominent in flowering plants sensu stricto (angiosperms), where they often comprise an attractive perianth. There is evidence that spermatophytes evolved from gymnosperm-like plants with a fern-like mode of reproduction called progymnosperms. It seems plausible, therefore, that the stamens/carpels and pollen sacs/nucelli of spermatophytes are homologous to fern sporophylls and sporangia, respectively. However, the exact mode and molecular basis of early seed and flower evolution is not yet known. Comparing flower developmental control genes to their homologs from lower plants that do not flower may help to clarify the issue. We have isolated and characterized MADS-box genes expressed in gametophytes and sporophytes of the fern Ceratopteris. The data indicate that at least two different MADS-box genes homologous to floral homeotic genes existed in the last common ancestor of contemporary vascular plants, some descendants of which underwent multiple duplications and diversifications and were recruited into novel developmental networks during the evolution of floral organs.
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	6
Volume Number	94
Language	English
Publisher	National Academy of Sciences
Publisher Date	1997-04-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	DNA-Binding Proteins Chemistry Genetics Genes, Homeobox Genes, Plant Phylogeny Plants Classification Transcription Factors Amino Acid Sequence Cloning, Molecular Consensus Sequence Conserved Sequence Biosynthesis Evolution, Molecular MADS Domain Proteins Molecular Sequence Data Multigene Family Plant Proteins Sequence Homology, Amino Acid Comparative Study Multidisciplinary
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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