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E-GEOD-49289

ABSTRACT: Transcription profiling by high throughput sequencing of tomato of FUL1/FUL2-suppressed fruits harvested at preripening (mature green) stage and ripening (pink coloring) stage

PROVIDER: E-GEOD-49289 | ExpressionAtlas | 2019-05-14

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-49289-analysis-methods.tsv	Tabular
	E-GEOD-49289-analytics.tsv	Tabular
	E-GEOD-49289-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-49289-configuration.xml	Xml
	E-GEOD-49289-g3_g1-mvaPlot.png	Other

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Global gene expression analysis of normal and ripening inhibitor (rin) mutant tomatoes during ripening

Project description:Ripening is an important stage of fruit development to determine its quality as a diet. A tomato (Solanum lycopersicum) MADS-box transcription factor, RIPENING INHIBITOR (RIN), has been believed to serve as a regulator of ripening lying upstream of ethylene-dependent and ethylene-independent pathways. Here, we have conducted global gene expression analysis to comprehensively identify tomato genes whose expressions are affected by the rin mutation using microarray with RNA samples from the normal and rin mutant tomato fruits at the pre-ripening (mature green) and ripening (pink coloring) stages. By analysing this microarray data, we identified 342 of positively regulated and 473 negatively regulated genes by RIN, which showed >5 and <0.2 of the fold change ratio (FC) of normal fruits at the ripening stage relative to those at the pre-ripening stage, respectively, in a RIN-dependent manner. A chromatin immunoprecipitation (ChIP) analysis of the normal ripening tomatoes with the anti-RIN antibody revealed that the positively regulated gene set contained at least 13 direct RIN targets. We monitored global gene expression in normal (PK331 cultivar) and rin mutant (PK353 cultivar) tomatoes at the pre-ripening (mature green, G) and ripening (pink coloring, P) stages using microarray with three biological replicates for each sample.

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Gene expression in three stages of ripening tomato fruit

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Project description:The tomato (Solanum lycopersicum) MADS-box transcription factor RIPENING INHIBITOR (RIN) acts as a master regulator of tomato fruit ripening. We previously identified a direct RIN target gene Solyc07g052960, which encodes a putative GRAS family protein belonging to the SHORT-ROOT (SHR) branch, but its role was unknown. RNA interference (RNAi)-mediated gene silencing reduced Solyc07g052960 expression in transgenic fruits, but the fruits appeared to ripen normally. However, the transgenic fruits at the ripening stage showed a marked decrease of the expression levels of several ripening-induced genes, especially involved in cell wall modification and secondary metabolism. This suggests that Solyc07g052960 participates in the regulation of these processes as one component of the RIN-activated transcriptional cascade regulating fruit ripening in tomato. For a preliminary screening, we monitored global gene expression in tomato fruits from untransformed control (Ailsa Craig [AC] cultivar) and three transgenic lines with Solyc07g052960 knockdown by RNAi (lines T-7, T-22 and T-23) at the ripening (pink coloring) stage using microarray without biological replication.

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