Laser microdissection of narrow sheath mutant maize uncovers novel gene expression in the shoot apical meristem

Zhang, X., Madi, S., Borsuk, L., Nettleton, D., Elshire, R. J., Buckner, B., Janick-Buckner, D., Beck, J., Timmermans, M. C. P., Schnable, P. S., Scanlon, M. J. (June 2007) Laser microdissection of narrow sheath mutant maize uncovers novel gene expression in the shoot apical meristem. Plos Genetics, 3 (6). pp. 1040-1052. ISSN 1553-7390

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URL: https://www.ncbi.nlm.nih.gov/pubmed/17571927
DOI: 10.1371/journal.pgen.0030101

Abstract

Microarrays enable comparative analyses of gene expression on a genomic scale, however these experiments frequently identify an abundance of differentially expressed genes such that it may be difficult to identify discrete functional networks that are hidden within large microarray datasets. Microarray analyses in which mutant organisms are compared to nonmutant siblings can be especially problematic when the gene of interest is expressed in relatively few cells. Here, we describe the use of laser microdissection microarray to perform transcriptional profiling of the maize shoot apical meristem (SAM), a similar to 100-mu m pillar of organogenic cells that is required for leaf initiation. Microarray analyses compared differential gene expression within the SAM and incipient leaf primordium of nonmutant and narrow sheath mutant plants, which harbored mutations in the duplicate genes narrow sheath1 (ns1) and narrow sheath2 (ns2). Expressed in eight to ten cells within the SAM, ns1 and ns2 encode paralogous WUSCHEL1-like homeobox (WOX) transcription factors required for recruitment of leaf initials that give rise to a large lateral domain within maize leaves. The data illustrate the utility of laser microdissection-microarray analyses to identify a relatively small number of genes that are differentially expressed within the SAM. Moreover, these analyses reveal potentially conserved WOX gene functions and implicate specific hormonal and signaling pathways during early events in maize leaf development.

Item Type: Paper
Uncontrolled Keywords: INDUCIBLE RESPONSE REGULATORS DEPENDENT AUXIN GRADIENTS BOX PROTEIN TIR1 LEAF DEVELOPMENT HOMEOBOX GENE CAPTURE MICRODISSECTION ARABIDOPSIS-THALIANA MICROARRAY EXPERIMENTS STATISTICAL-METHODS DUPLICATE GENES
Subjects: bioinformatics > genomics and proteomics > databases
bioinformatics > genomics and proteomics > analysis and processing > microarray gene expression processing
organism description > plant behavior
Investigative techniques and equipment > optical devices > lasers
CSHL Authors:
Communities: CSHL labs > Timmermans lab
Depositing User: CSHL Librarian
Date: June 2007
Date Deposited: 30 Aug 2011 12:48
Last Modified: 17 Feb 2017 16:34
PMCID: PMC1904365
Related URLs:
URI: http://repository.cshl.edu/id/eprint/15295

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