GEOapplication/xmlftp://ftp.ncbi.nlm.nih.gov/geo/series/GSE15nnn/GSE15722/primaryOK2000000GenomicsArabidopsis thalianaExpression profiling by arrayhttps://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE15722GEOGSE0falseChromosomal duplication in the grandifolia-D mutants of Arabidopsis thaliana, expression dataThe number of cells in an organ is a major factor for the determination of organ size. However, genetic basis of cell number determination is not well understood. Three grandifolia-D (gra-D) mutants of Arabidopsis thaliana developed huge leaves containing two- to three-fold increased number of cells of the wild type. Tiling array and microarray analysis of gra-D mutants suggested that genes found in a lower part of chromosome 4 were upregulated, suggesting the occurrence of segmental chromosomal duplications in the gra-D mutants. These region contain positive regulators of cell proliferation such as AINTEGUMENTA (ANT) and cyclin genes such as CYCD3;1.2009/06/02GSE15722GSM393527GSM393528GSM393525GSM393526GSM393523GSM393524GSM393532GSM393521GSM393522GSM393530GSM393531GSM393529845515722Arabidopsis thaliana[19508432]