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Histone demethylase SlJMJ7 integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato.

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Solanum lycopersicum

PROVIDER: GSE148527 | GEO | 2021/07/10

REPOSITORIES: GEO

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Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato

Project description:Combinational analyses of genome-wide transcription, binding sites and histone H3K4 trimethylation profiles revealed that SlJMJ7 directly binds and represses the expression of a series of key ripening-associated factors, including ethylene biosynthesis genes ACS2/4/8 and ACO2, DNA demethylase DML2, as well as the ripening-related transcription factors RIN and NOR by removal the mark of H3K4-trimethylation. Moreover, SlJMJ7 directly and indirectly modulates the transcription of genes related to diverse physiological traits of fruit ripening.

2021-06-22 | GSE153080 | GEO

Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato [RNA-seq]

2021-07-10 | GSE148526 | GEO

Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato [ChIP-seq]

2021-07-10 | GSE148525 | GEO

Histone demethylase SlJMJ7 integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato.

Project description:Histone demethylase SlJMJ7 integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato.

| PRJNA624885 | ENA

Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato

Project description:Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato

| PRJNA641397 | ENA

Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato [RNA-seq]

Project description:Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato [RNA-seq]

| PRJNA624888 | ENA

Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato [ChIP-seq]

Project description:Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato [ChIP-seq]

| PRJNA624889 | ENA

A DEMETER-like DNA demethylase governs tomato fruit ripening.

Project description:In plants, genomic DNA methylation which contributes to development and stress responses can be actively removed by DEMETER-like DNA demethylases (DMLs). Indeed, in Arabidopsis DMLs are important for maternal imprinting and endosperm demethylation, but only a few studies demonstrate the developmental roles of active DNA demethylation conclusively in this plant. Here, we show a direct cause and effect relationship between active DNA demethylation mainly mediated by the tomato DML, SlDML2, and fruit ripening- an important developmental process unique to plants. RNAi SlDML2 knockdown results in ripening inhibition via hypermethylation and repression of the expression of genes encoding ripening transcription factors and rate-limiting enzymes of key biochemical processes such as carotenoid synthesis. Our data demonstrate that active DNA demethylation is central to the control of ripening in tomato.

| S-EPMC4553810 | biostudies-literature

Roles of RIN and ethylene in tomato fruit ripening and ripening-associated traits.

Project description:RIPENING INHIBITOR (RIN)-deficient fruits generated by CRISPR/Cas9 initiated partial ripening at a similar time to wild-type (WT) fruits but only 10% WT concentrations of carotenoids and ethylene (ET) were synthesized. RIN-deficient fruit never ripened completely, even when supplied with exogenous ET. The low amount of endogenous ET that they did produce was sufficient to enable ripening initiation and this could be suppressed by the ET perception inhibitor 1-MCP. The reduced ET production by RIN-deficient tomatoes was due to an inability to induce autocatalytic system-2 ET synthesis, a characteristic feature of climacteric ripening. Production of volatiles and transcripts of key volatile biosynthetic genes also were greatly reduced in the absence of RIN. By contrast, the initial extent and rates of softening in the absence of RIN were similar to WT fruits, although detailed analysis showed that the expression of some cell wall-modifying enzymes was delayed and others increased in the absence of RIN. These results support a model where RIN and ET, via ERFs, are required for full expression of ripening genes. Ethylene initiates ripening of mature green fruit, upregulates RIN expression and other changes, including system-2 ET production. RIN, ET and other factors are required for completion of the full fruit-ripening programme.

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Ripening-associated ethylene biosynthesis in tomato fruit is autocatalytically and developmentally regulated.

Project description:To investigate the regulatory mechanism(s) of ethylene biosynthesis in fruit, transgenic tomatoes with all known LeEIL genes suppressed were produced by RNA interference engineering. The transgenic tomato exhibited ethylene insensitivity phenotypes such as non-ripening and the lack of the triple response and petiole epinasty of seedlings even in the presence of exogenous ethylene. Transgenic fruit exhibited a low but consistent increase in ethylene production beyond 40 days after anthesis (DAA), with limited LeACS2 and LeACS4 expression. 1-Methylcyclopropene (1-MCP), a potent inhibitor of ethylene perception, failed to inhibit the limited increase in ethylene production and expression of the two 1-aminocyclopropane-1-carboxylic acid (ACC) synthase (ACS) genes in the transgenic fruit. These results suggest that ripening-associated ethylene (system 2) in wild-type tomato fruit consists of two parts: a small part regulated by a developmental factor through the ethylene-independent expression of LeACS2 and LeACS4 and a large part regulated by an autocatalytic system due to the ethylene-dependent expression of the same genes. The results further suggest that basal ethylene (system 1) is less likely to be involved in the transition to system 2. Even if the effect of system 1 ethylene is eliminated, fruit can show a small increase in ethylene production due to unknown developmental factors. This increase would be enough for the stimulation of autocatalytic ethylene production, leading to fruit ripening.

| S-EPMC2724697 | biostudies-literature