... of conical epidermal cells in petals of Antirrhinum majus . Another gene encoding an R2R3 MYB factor very closely related to MIXTA, AmMYBML2, is also expressed in flowers of A. majus . We have analysed the roles of AmMYBML2 and two MIXTA -related genes, PhMYB1 from Petunia hybrida and AtMYB16 from...

... encodes a DNA-binding protein that recognises sites in a downstream target gene RADIALIS ( RAD )in Antirrhinum . The interaction between CYC and RAD can be reconstituted in Arabidopsis , which has radially symmetrical flowers. Overexpression of CYC in Arabidopsis modifies petal and leaf development...

...-domain and TCP-domain factors. † Author for correspondence (e-mail: [email protected] ) * These authors contributed equally to this work 18 11 2003 © 2004. 2004 Antirrhinum Arabidopsis Boundaries Meristems Transcription factors A characteristic feature...

...Nadia Efremova; Marie-Christine Perbal; Alexander Yephremov; Winfried A. Hofmann; Heinz Saedler; Zsuzsanna Schwarz-Sommer To assess the contribution of the epidermis to the control of petal and stamen organ identity, we have used transgenic Antirrhinum and Arabidopsis plants that expressed...

...Mark Wilkinson; Eugenia de Andrade Silva; Sabine Zachgo; Heinz Saedler; Zsuzsanna Schwarz-Sommer ABSTRACT Two Antirrhinum majus mutants, choripetala ( cho ) and despenteado ( desp ), exhibit identical highly pleiotropic phenotypes including petaloid transformation of first whorl floral organs...

...Paula C. M. McSteen; Coral A. Vincent; Sandra Doyle; Rosemary Carpenter; Enrico S. Coen ABSTRACT The development of reproductive organs in Antirrhinum depends on the expression of an organ identity gene, plena , in the central domain of the floral meristem. To investigate the mechanism by which...

..., resembling subdivision of third whorl organs in the sty mutant ( Fig. 3E ). The phenotypic similarity of sty / fis and mutants of the Arabidopsis A class gene AP2 , prompted us to clone Antirrhinum cDNAs which display sequence similarity to AP2 (H. Sommer, P. Motte, H. Meijer, Z. Schwarz...

...Jorge Almeida; Margarida Rocheta; Lisete Galego ABSTRACT The asymmetric shape of the Antirrhinum corolla is determined by genes acting differentially along the dorsoventral axis of the flower. Genes so far identified determine asymmetry by acting in dorsal regions. We describe a gene, divaricata...

...Marie-Christine Perbal; George Haughn; Heinz Saedler; Zsuzsanna Schwarz-Sommer ABSTRACT In Antirrhinum majus , petal and stamen organ identity is controlled by two MADS-box transcription factors, DEFICIENS and GLOBOSA. Mutations in either of these genes result in the replacement of petals...

... 1995 flower development gene expression MADS-box in vitro DNA binding Antirrhinum DEFICIENS Mature flowers of Antirrhinum are composed of a whorl of sepals, the first organs initiated, followed by a whorl of petals, then stamens and, initiated lastly, an internal whorl...

... of parallel mutations in key developmental genes are being studied in different species. In Antirrhinum , three of these key genes are: (1) floricaula (flo) a gene required for the production of flowers (2) centrora- dialis (cen) , a gene controlling flower position (3) cycloidea (eye) , a gene controlling...

...Enrico S. Coen; Sandra Doyle; JOse M. Romero; Robert Elliott; Ruth Magrath; Rosemary Carpenter In order to study genes controlling flower development, we have carried out an extensive transposon-mutagenesis experiment in Antirrhinum majus . More than 15 independent homeotic mutations were obtained...