Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

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

ABSTRACT: 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.

ORGANISM(S): Solanum lycopersicum

SUBMITTER: Yasuhiro Ito

PROVIDER: E-GEOD-28564 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Direct targets of the tomato-ripening regulator RIN identified by transcriptome and chromatin immunoprecipitation analyses.

Fujisawa Masaki M Shima Yoko Y Higuchi Naoki N Nakano Toshitsugu T Koyama Yoshiyuki Y Kasumi Takafumi T Ito Yasuhiro Y

Planta 20111209 6

The physiological and biochemical changes in fruit ripening produce key attributes of fruit quality including color, taste, aroma and texture. These changes are driven by the highly regulated and synchronized activation of a huge number of ripening-associated genes. In tomato (Solanum lycopersicum), a typical climacteric fruit, the MADS-box transcription factor RIN is one of the earliest-acting ripening regulators, required for both ethylene-dependent and ethylene-independent pathways. Although ...[more]

PMID: 22160566

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Project description:Tomato fruit ripening is under the control of ethylene as well as a group of ethylene-independent transcription factors, including NON-RIPENING (NOR) and RIPENING INHIBITOR (RIN). During ripening, the linear carotene lycopene accumulates at the expense of cyclic carotenoids. Fruit-specific overexpression of LYCOPENE β-CYCLASE (LCYb) under the control of the PHYTOENE DESATURASE (PDS) promoter resulted in increased levels of β-carotene and ABA and in decreased ethylene levels. Genes regulated by ABA, or involved in its synthesis and signaling, were overexpressed, while those associated with ethylene and cell wall remodeling were repressed. In agreement with the transcriptional data, LCYb-overexpressing fruits exhibited increased density of cell wall material containing linear, under-methylated pectins and displayed an array of additional ripening phenotypes, including delayed softening, increased turgor, enhanced shelf life and a thicker cuticle with a higher content of cutin monomers and triterpenoids. The levels of several primary metabolites and phenylpropanoids also changed in the transgenics, which could be attributed to delayed fruit ripening and to ABA respectively. Network correlation analysis suggests that ABA, acting through NOR and RIN, is responsible for many of the above phenotypes. These data reinforce suggestions that ABA plays an important role in tomato fruit ripening and provide clues that fruit b-carotene, acting as a precursor for ABA, actively participates in controlling the ripening process rather than merely being an output thereof. Overexpression of a LCYb gene from Arabidopsis under the control of the ripening-associated PDS promoter leads to ripe tomato fruits accumulating high β-carotene levels. Using several independent transgenic lines, we conducted a system-wide study of the effect of increased β-carotene levels on tomato fruit ripening and shelf life. Our data suggest that β-carotene, acting through ABA, is involved in a regulatory loop within the network controlling tomato fruit ripening.

Dataset Information

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

Publications

Direct targets of the tomato-ripening regulator RIN identified by transcriptome and chromatin immunoprecipitation analyses.

Similar Datasets

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