Project description:Exposure to UV-C irradiance effectively maintains fruit quality, however the mechanisms by which it ensures tomato postharvest quality remain unclear. We conducted a comprehensive analysis of the transcriptome, volatilome, DNA methylome, and RNA methylome of tomato fruit in order to construct a UV-C regulatory network. UV-C was found to induce the expression of hormones-related, flavonoid, and resistance genes, to delay senescence, and to promote the expression of sugar and acid metabolism genes, leading to the synthesis of soluble sugars and degradation of citric acid in a manner that maintains fruit taste characteristics. Volatilome results demonstrated that UV-C enhanced the accumulation of 3-methyl-2-butenal, β-damascenone, and 6-methyl-5-heptene-2-one by regulating genes associated with the metabolism of these volatile organic compounds. Additionally, UV-C contributed to the retention of accessible chromatin regions (ACRs), with genes associated with plant hormones showing variation in expression corresponding to chromatin accessibility. UV-C also inhibited the decrease in DNA methylation during ripening, with dynamic changes in DNA methylation and RNA methylation of genes related to hormones, flavonoids, texture, and resistance, ultimately delaying fruit senescence. This study is the first to comprehensively elucidate the regulatory role of UV-C on tomato postharvest ripening and as such provides valuable insights into epigenetic modifications which could represent important tools for future quality-based breeding programs.

2025-11-18 | GSE290063 | GEO

Transcriptomic and epigenetic signatures of tomato fruit after postharvest UV-C irradiation are associated with the maintenance of fruit quality.

Project description: Not available

| S-EPMC12483979 | biostudies-literature

The effect of Epigallocatechin-3-Gallate (EGCG), a main active ingredient in tea residues, on improving fruit quality and prolonging postharvest storage in apple

Project description:EGCG, as an active oxygen scavenger, has a significant effect on inhibiting the greasiness of apples. However, the impact of greasiness on fruit storage and how EGCG eliminates this effect, as well as its influence on apple quality formation, have not been clarified. In this study, we found that exogenous application of EGCG effectively improved a series of nutritional growth indicators, including seedling growth status and photosynthetic activity. Additionally, it significantly increased indicators of reproductive growth, such as fruit diameter, soluble solids content, surface wax, and surface smoothness. Through our experiments, we further discovered that greasiness primarily affects fruit respiration, accelerating fruit decay and causing harm during storage, while EGCG mitigates this process. We also found that the application of tea residue had similar effects to exogenous EGCG. Collectively, these studies suggest that EGCG could be used as a novel foliar fertilizer to enhance overall fruit quality. Moreover, the application of tea residue has similar effects to EGCG, providing a cost-effective solution for apple production.

2023-12-02 | GSE248662 | GEO

Regulation of Postharvest Tomato Fruit Ripening by Endogenous Salicylic Acid.

Project description: Not available

| S-EPMC8216237 | biostudies-literature

Expression data from postharvest Ponkan (Citrus reticulata Blanco) fruit under cold storage

Project description:Low temperature storage of citrus fruits are susceptible to chilling disorder symptoms that impact fruit quality. Understanding the molecular frame underlying the cold storage process will provide a basic guidance for practical control. We used Affymetrix Citrus GeneChip to examine the transcriptional changes in cold-stored Citrus reticulata Blanco cv. âPonkanâ pulp tissue for three successive months. Ponkan postharvest fruits were under cold storage for three successive months. The pulp tissue was used for RNA extraction and hybridization on Affymetrix Citrus Genome microarrays.

2010-05-17 | E-GEOD-19543 | biostudies-arrayexpress

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