Download Mouse ears

Name: Mouse ears (Me)
Accessions: LS2
Gene ID: Solyc02g081120
Map position: chromosome 2 (long arm)
Gene function: Homeobox transcription factor
Gene effect: This class of transcription factor is believed to extend meristematic
activity, thus producing more elaborated meristem-derived leaves.
Phenotypes: Plants with the mutated allele present shortened internodes, augmented
number of leaflets (leaves are 3-4 pinnate), leaflets have clavate segments. Formation
of supernumerary carpels in the ovary of homozygous plants.
Comments: The tomato Me/TKn2/LeT6 is orthologous to the Arabidopis SHOOT
MERISTEM LESS (STM). Homeobox genes are known to down regulate gibberellins
levels and up regulate cytokinin levels. The mRNA of ME is known to be translocated in
phloem.
Description of accessions available: MT-Me is a BC6F3 introgressed from LA0715
Figures:
Heterozygous MT-Me plant showing high dissected leaves.
Bibliography
Chen JJ, Janssen BJ, Williams A, Sinha N (1997) A gene fusion at a Homeobox locus:
alterations in leaf shape and implications for morphological evolution. Plant Cell
9:1289-1304.
Hay A, Craft J, Tsiantis M (2004) Plant hormones and homeoboxes: Bridging the gap?
Bioessays 26: 395–404
Janssen B-J, Lund L, Sinha N (1998) Overexpression of a homeobox gene, LeT6, reveals
indeterminate features in the tomato compound leaf. Plant Physiology 117: 771–786
Kim M, Canio W, Kessler S, Sinha N (2001) Developmental changes due to longdistance movement of a Homeobox fusion transcript in tomato. Science 293:287-289.
Parnis A, Cohen O, Gutfinger T, Hareven D, Zamir D, Lifschitz E (1997) The dominant
developmental mutants of tomato, Mouse-ear and Curl, are associated with distinct
modes of abnormal transcriptional regulation of a knotted gene. Plant Cell 9:21432158.
Silva GFF, Silva EM, Azevedo MS, Guivin MAC, Ramiro DA, Figueiredo CR, Carrer H,
Peres LEP, Nogueira FTS (2014) microRNA156-targeted transcription factors regulate
tomato ovary and fruit development. Plant Journal, 78:604-618.