MADS-box genes are involved in floral development and evolution

• Autorzy: Saedler H. , Becker A. , Winter K.U. , Kirchner C. , Theissen G.
• Języki publikacji: EN

Abstrakty

EN

MADS-box genes encode transcription factors in all eukaryotic organisms thus far studied. Plant MADS-box proteins contain a DNA-binding (M), an intervening (I), a Keratin-like (K) and a C-terminal C-domain, thus plant MADS-box proteins are of the MIKC type. In higher plants most of the well-characterized genes are involved in floral development. They control the transition from vegetative to generative growth and determine inflorescence meristem identity. They specify floral organ identity as out­lined in the ABC model of floral development. Moreover, in Antirrhinum majus the MADS-box gene products DEF/GLO and PLE control cell proliferation in the develop­ing flower bud. In this species the DEF/GLO and the SQUA proteins form a ternary complex which determines the overall "Bauplan" of the flower. Phylogenetic reconstructions of MADS-box sequences obtained from ferns, gymno- sperms and higher eudicots reveal that, although ferns possess already MIKC type genes, these are not orthologous to the well characterized MADS-box genes from gym- nosperms or angiosperms. Putative orthologs of floral homeotic B- and C-function genes have been identified in different gymnosperms suggesting that these genes evolved some 300-400 million years ago. Both gymnosperms and angiosperms also contain a hitherto unknown sister clade of the B-genes, which we termed Bsister. A novel hypothesis will be described suggesting that B and Bsister might be involved in sex determination of male and female reproductive organs, respectively.

Słowa kluczowe

EN

phylogenesis; vegetative growth; transcription factor; development; eukaryotic organism; plant growth; plant genetics; evolution

• Wydawca: -
• Czasopismo: Acta Biochimica Polonica
• Rocznik: 2001
• Tom: 48
• Numer: 2
• Opis fizyczny: p.351-358,fig.

Twórcy

autor

Saedler H.

• Max-Planck-Institut fur Zuchtungsforschung, Carl-von-Linne Weg 10, 50829 Cologne, Germany

autor

Becker A.

autor

Winter K.U.

autor

Kirchner C.

autor

Theissen G.

Bibliografia

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