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Short-term responses of apple fruit to partial re-oxygenation during extreme hypoxic storage conditions.

08:00 EDT 9th April 2019 | BioPortfolio

Summary of "Short-term responses of apple fruit to partial re-oxygenation during extreme hypoxic storage conditions."

The short-term (24h) responses of apple fruit (cv 'Granny Smith') to the shift of oxygen concentration from 0.4 to 0.8 kPa, a protocol applied in Dynamic Controlled Atmosphere (DCA) storage technique, have been studied. Metabolomics and transcriptomics analyses of cortex tissue showed an immediate down-regulation of fermentative metabolism and of the GABA shunt in parallel with the activation of several 2-oxoglutarate-dependent dioxygenases genes. A down-regulation of the free phenylpropanoid pathway genes and the diversion of propanoid synthesis towards the methyl-erythritol phosphate route was also observed. The partial re-oxygenation induced an increase of glyceric, palmitic and stearic acids and of several phosphatidylcholines and phosphatidylethanolamines, and a decrease of specific amino acids (valine, methionine, glycine, phenylalanine, GABA), organic acids (arachidic and citric acid), and secondary metabolites (catechin and epicatechin). The oxygen shift also resulted in transcriptional re-wiring of several components of IAA and ABA regulation and signalling. These results provide novel insights on the complexity of the short-term physiological responses of apple fruit to partial re-oxygenation applied during DCA storage.

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This article was published in the following journal.

Name: Journal of agricultural and food chemistry
ISSN: 1520-5118
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