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Analysis of gene expression patterns of Arabidopsis roots grown in methyl jasmonate (MeJA), cytokinin (CK), MeJA/CK- treated conditions

ABSTRACT: Purpose: Understanding of MeJA, CK effect on regulation of gene expression patterns in Arabidopsis roots

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE80188 | GEO | 2016/07/30

SECONDARY ACCESSION(S): PRJNA318266

REPOSITORIES: GEO

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Analysis of gene expression patterns of Arabidopsis roots grown in methyl jasmonate (MeJA), cytokinin (CK), MeJA/CK- treated conditions

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Transcriptomic analysis of Arabidopsis wild-type (Col-0), phyb-9, jaz10 and jaz10phyB-9 plants to methyl jasmonate (MeJA)

Project description:We used Affymetrix 1.0 ST arrays to compare the transcriptome of 4 weeks‐day‐old plants sprayed with 250uM of MeJA or mock (control). For the experiments we used wild-type (Col-0), phyB-9 and jaz10 single mutants and jaz10phyb double mutant. Samples were harvested after 3hours of induction with MeJA or mock. We performed a first analysis with the transcriptomes of wild‐type (Col-0) to identify those group of genes that are up‐ and down‐regulated by MeJA treatment (2 fold-changes). We founded 719 genes whose expression was statistically significantly different between the two treatments. To gain knowledge into the regulation of phyB over these set of 719 genes, we contrasted their expression levels against phyB transcriptome. By cluster analysis, we identified five major groups of genes, where in two of them the transcript levels increased in presence of MeJA (clusters 1 and 2) and three whose expression decrease after MeJA treatment (Cluster 3, 4 and 5).

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Project description:Licorice (Glycyrrhiza uralensis Fisch) flavonoids have many pharmacological effects, as the main chemical component of licorice, its content directly affects the quality of licorice. Methyl jasmine (MeJA) is an important signaling molecule in the secondary metabolic pathway of plants, but the biological mechanisms that stimulating the production of licorice flavonoids and the related changes in transcriptome are still less studied. In this research, the expression of two key enzyme genes: Chalcone synthase (CHS) and Cinnamate 4-hydroxylase (C4H) in the biosynthesis pathway of licorice flavonoids was determined, and it was significantly different after 9 hours of MeJA induction. The transcriptome profiles of licorice cells at 9 hours after MeJA treatment were analyzed to investigate the transcriptional alterations of licorice cell in response to MeJA elicitation by “RNA-seq”. 151, 529 transcripts (200 bp in length) of cDNA from the samples were generated, and 116, 907 unigenes were found. MeJA appeared to stimulate a large number of genes involved in several relevant functional categories, such as carbohydrate metabolism and encoding transcription factors, 11 MYB transcription factors expressed significant differences were screened. This comprehensive description of gene expression information could help elucidate the molecular mechanism of MeJA-mediated biosynthesis of licorice flavonoids and MeJA-regulated network formation.

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