title: Isolation and characterization of two knotted-like homeobox genes from tomato.
abstract: Homeobox genes are known to play a role in developmental regulation. The knotted-like homeobox (knox) genes fall into two classes. The class I knox genes like knl, stml, and knatl are involved in maintaining meristem identity in cells. The function of class II knox genes is at yet undetermined. We have characterized two knox genes from tomato. LeT6 and LeT12 map to distinct chromosome locations that are different from the location for a recently cloned knox gene from tomato, tknl, confirming that plant homeobox genes are not clustered on chromosomes. These genes have a distinct expression pattern. Unlike other class I knl-like genes, LeT6 is expressed in developing lateral organs and developing ovaries in flowers. LeT12 is more ubiquitously expressed in the mature plant. RNA in situ localization data suggest that both these genes may have a role to play in formative events in ovule and embryo morphogenesis.
authors.affiliation: Section of Plant Biology, University of California, Davis 95616, USA.
authors.forename: B J
authors.initials: BJ
authors.lastname: Janssen
authors.forename: A
authors.initials: A
authors.lastname: Williams
authors.forename: J J
authors.initials: JJ
authors.lastname: Chen
authors.forename: J
authors.initials: J
authors.lastname: Mathern
authors.forename: S
authors.initials: S
authors.lastname: Hake
authors.forename: N
authors.initials: N
authors.lastname: Sinha
mesh_terms: D000595:Amino Acid Sequence; D002874:Chromosome Mapping; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D005801:Genes, Homeobox; D017343:Genes, Plant; D018398:Homeodomain Proteins / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics; D018551:Solanum lycopersicum / Q000235:genetics* / Q000254:growth & development; D008969:Molecular Sequence Data; D009687:Nuclear Proteins; D010940:Plant Proteins; D012333:RNA, Messenger / Q000096:biosynthesis; D018749:RNA, Plant / Q000096:biosynthesis; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D014158:Transcription, Genetic
chemical_list: D018398:Homeodomain Proteins; C110894:LET12 protein, Lycopersicon esculentum; D009687:Nuclear Proteins; D010940:Plant Proteins; D012333:RNA, Messenger; D018749:RNA, Plant; C110893:T6 protein, Lycopersicon esculentum