Comparative analysis of transcriptome profiles of G. hirsutum L. cv. MCU5 and its fuzzless-lintless mutant during fiber development stages.
Ontology highlight
ABSTRACT:
ORGANISM(S): Gossypium raimondii Gossypium arboreum Gossypium hirsutum Gossypium barbadense
PROVIDER: GSE38490 | GEO | 2013/06/14
SECONDARY ACCESSION(S): PRJNA168019
REPOSITORIES: GEO
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Project description:This experiment was designed to investigate the molecular basis of cotton fiber cell initiation. 32,000 ESTs were sequenced from Gossypium hirsutum L. TM-1 immature ovules (GH_TMO) and developed cotton oligonucleotide microarrays containing ~23,000 unigenes. Transcriptome analyses were performed to compare gene expression changes in laser capture microdissected fiber cell initials (or epidermis) and inner ovules. The gene expression profiles of the fiber cell initials were compared with those of the inner ovules in each developmental stage prior to, right at, and shortly after the initiation of fiber cells. Many genes in various molecular function or biological processes were over- or under-represented between fibers and non-fiber tissues in each developmental stage, suggesting temporal regulation of gene expression during early stages of fiber development. For gene expression studies using a large set cotton oligo-microarray, 4 developmental stages were chosen. To study differential expression during fiber initiation, ovules at -2 DPA, 0 DPA, and 2 DPA were used. One of the fiber elongation stage tissues (7 DPA) was included. In each developmental stage, epidermis was separated from inner ovules and subjected to the hybridization. In addition, epidermis and ovule comparisons were performed individually with 0 DPA as a control point for comparison.
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Project description:Transcriptome analysis in cotton during fibre development stages. To study the molecular response of drought stress in cotton under field condition global gene expression analysis was carried out at fibre development stages (0, 5, 10 and 20 dpa/Days post anthesis). Gossypium hirsutum cv. Bikaneri Nerma was used for the gene expression analysis. Cotton plants were subjected to drought stress at peak flowering stage. Samples were collected when the soil moisture content was 19.5% which is 50% of the normal control plots. Gene expression profiles in drought induced and their respective control samples were analyzed using Affymertix cotton Genechip Genome arrays to study the global changes in the expression of genome. Total RNA was isolated from 0 dpa, 5 dpa, fibre bearing ovules of 10 dpa, and fibre bearing ovules of 20 dpa. Samples were collected from both drought induced and control plants. Biotin labeled cRNA was hybridized on Affymertix cotton Genechip Genome array following the Affymetrix protocols. Three biological replicates were maintained.
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Project description:A cDNA library from 0-10 day post anthesis cotton ovules was established to study genes expressed in cotton ovule during initiation and quickly elongation period. We randomly sequenced over 100,000 ESTs from this library and acquired a gene pool of more than 28,000 UniESTs. The cotton UniESTs were then PCR-amplified and printed onto microarray. This array is comprised of about 28000 high-quality cotton cDNAs (with average length>750bp) and external controls. To study the different growth potential of cotton fibers in a one-year cycle, we then hybridized the array with RNA samples derived from +7 DPA wild-type upland cotton fibers in four different seasons, respectively.
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