... ) Competing interests statement The authors declare no competing financial interests. 21 8 2012 © 2012. 2012 APETALA2 Floral development Transcriptional repression Arabidopsis In multicellular organisms, complex functional structures often require precise spatial...

... ) and included only one gene with a well-known role in floral development. UFO is expressed in meristems, functions upstream of the floral homeotic genes to set the pattern of AP3 expression and is only expressed at the earliest stages of reproductive organ development ( Ingram et al.,1995 ; Lee et al.,1997...

... (e-mail: anna.koltunow@csiro.au ) 8 4 2004 © 2004. 2004 C2H2 zinc finger KNUCKLES Parthenocarpy Floral development Fruit development The primordia of plant lateral organs arise from the flanks of pluripotent meristems. After specification, organogenesis proceeds from...

... and are not found in the form of free microspores as is seen in the wild type. Scale bars:1 μm in B; 50 μm in C. To investigate if DELLA proteins are repressors of floral development, we studied floral development in ga1-3 plants lacking various combinations of GAI, RGA, RGL1 and RGL2. First, we...

... Floral development Growth HUELLENLOS Organogenesis Ovules Pattern formation Knowledge about plant organogenesis is rudimentary. For example, in contrast to the impressive progress on the elucidation of the mechanisms of floral organ specification ( Coen and Meyerowitz, 1991 ; Ma, 1994...

..., USA 17 02 1998 01 04 1998 © 1998 by Company of Biologists 1998 Arabidopsis APETALA3 Homeotic gene,Transcriptional regulation Floral development The Arabidopsis flower consists of four whorls of organs: sepals, petals, stamens and carpels, which arise...

... Tübingen, Spemannstrasse 37-39, D-72076 Tübingen, Germany * Author for correspondence (e-mail: schneitz@botinst.unizh.ch ) 30 01 1997 © 1997 by Company of Biologists 1997 Arabidopsis floral development morphogenesis organogenesis ovules pattern formation...

..., allowing three categories of genes to be defined. The first includes floricaula (flo) , a primary gene required for the initiation of the floral developmental pathway. In the absence of the wild-type flo product, proliferating inflorescence meristems arise in place of flowers. The flo gene has been...