Minimum number of tobacco LFY genes: 2
Count of tobacco LFY sequences: 7
Pfam accession: FLO_LFY
SHOULD possess FLO_LFY domain
The initial steps of flower development involve two classes of consecutively acting regulatory genes. Meristem-identity genes, which act early to control the initiation of flowers, are expressed throughout the incipient floral primordium. Homeotic genes, which act later to specify the identity of individual floral organs, are expressed in distinct domains within the flower. The link between the two classes of genes has remained unknown so far. Here we show that the meristem-identity gene LEAFY has a role in controlling homeotic genes that is separable from its role in specifying floral fate. On the basis of our observation that LEAFY activates different homeotic genes through distinct mechanisms, we propose a genetic framework for the control of floral patterning.
The plant-specific LEAFY (LFY) protein is necessary and sufficient for the vital switch from vegetative to reproductive development in dicotyledonous plant species. LFY controls the production of the flowers, which are formed in lieu of secondary inflorescences from the flanks of the shoot apical meristem. Because LFY is required for all of the major features that differentiate flowers from inflorescence branches, it is referred to as a meristem identity gene.
Parcy, F; Nilsson, O; Busch, MA; Lee, I; Weigel, D. A genetic framework for floral patterning. Nature 1998. 395(6702):561-6 PMID: 9783581
Weigel, D; Alvarez, J; Smyth, DR; Yanofsky, MF; Meyerowitz, EM. LEAFY controls floral meristem identity in Arabidopsis. Cell 1992. 69(5):843-59 PMID: 1350515
William DA, Su Y, Smith MR, Lu M, Baldwin DA, Wagner D. Genomic identification of direct target genes of LEAFY. Proc Natl Acad Sci U S A. 2004 Feb 10;101(6):1775-80. Epub 2004 Jan 21. PMID: 14736918
Number of contigs: 5
Number of singlets: 0
Tobaco contains two leafy genes NFL1 and NFL2. Both are present in the GSSs.
Total minimum number – 2
Paul J Rushton
Marta T. Bokowiec
Xianfeng (Jeff) Chen
Thomas (Tom) W Laudeman
Jennifer F. Brannock
Michael P. Timko