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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
7
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pubmed:dateCreated |
1999-9-13
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pubmed:abstractText |
Maize leaves have a stereotypical pattern of cell types organized into discrete domains. These domains are altered by mutations in knotted1 (kn1) and knox (for kn1-like homeobox) genes. Gnarley (Gn1) is a dominant maize mutant that exhibits many of the phenotypic characteristics of the kn1 family of mutants. Gn1 is unique because it changes parameters of cell growth in the basal-most region of the leaf, the sheath, resulting in dramatically altered sheath morphology. The strongly expressive allele Gn1-R also gives rise to a floral phenotype in which ectopic carpels form. Introgression studies showed that the severity of the Gn1-conferred phenotype is strongly influenced by genetic background. Gn1 maps to knox4, and knox4 is ectopically expressed in plants with the Gn1-conferred phenotype. Immunolocalization experiments showed that the KNOX protein accumulates at the base of Gn1 leaves in a pattern that is spatially and temporally correlated with appearance of the mutant phenotype. We further demonstrate that Gn1 is knox4 by correlating loss of the mutant phenotype with insertion of a Mutator transposon into knox4.
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pubmed:commentsCorrections |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Jul
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pubmed:issn |
1040-4651
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
11
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
1239-52
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pubmed:dateRevised |
2010-9-13
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pubmed:meshHeading |
pubmed-meshheading:10402426-Alleles,
pubmed-meshheading:10402426-Amino Acid Sequence,
pubmed-meshheading:10402426-Genes, Dominant,
pubmed-meshheading:10402426-Genes, Homeobox,
pubmed-meshheading:10402426-Homeodomain Proteins,
pubmed-meshheading:10402426-Molecular Sequence Data,
pubmed-meshheading:10402426-Mutation,
pubmed-meshheading:10402426-Plant Leaves,
pubmed-meshheading:10402426-Plant Proteins,
pubmed-meshheading:10402426-Sequence Homology, Amino Acid,
pubmed-meshheading:10402426-Zea mays
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pubmed:year |
1999
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pubmed:articleTitle |
Gnarley1 is a dominant mutation in the knox4 homeobox gene affecting cell shape and identity.
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pubmed:affiliation |
Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't
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