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Title

Effect of high CO2 pretreatment on quality, fungal decay and molecular regulation of stilbene phytoalexin biosynthesis in stored table grapes

AuthorsSánchez Ballesta, M. Teresa ; Jiménez, J. B.; Romero, I.; Orea, J. M.; Maldonado, Roberto; Ureña, A. G.; Escribano, M. Isabel
Issue Date2006
PublisherElsevier
CitationPostharvest Biology and Technology 42: 209- 216 (2006)
AbstractTable grapes (Vitis vinifera) cv. Cardinal stored at low temperature were analysed to determine the effect of pretreatment with 20 kPa O2 + 20 kPa CO2 + 60 kPa N2 for 3 days on quality and control of decay. The pattern of stilbene synthase (STS) gene expression and trans-resveratrol levels were also analyzed in grapes during low temperature storage at 0 °C and further shelf-life at 20 °C for 2 days. Our results showed that high CO2 pretreatment was effective for improving appearance of the bunches and maintaining the quality of the berries. In CO2-treated bunches the browning and withering index, the decline in relative water content and the weight loss were also lower than in non-treated ones. The levels of STS mRNA and the accumulation of trans-resveratrol in CO2-treated grapes were much lower than in the non-treated grapes during low temperature storage. Moreover, the pattern of STS gene expression and trans-resveratrol content in CO2-treated grapes was consistent with the reduction of natural total decay produced by this pretreatment. This effective non-stressing treatment avoids the induction of trans-resveratrol during low temperature storage until its synthesis is enhanced during shelf-life at 20 °C. © 2006 Elsevier B.V. All rights reserved.
URIhttp://hdl.handle.net/10261/79683
DOI10.1016/j.postharvbio.2006.07.002
Identifiersdoi: 10.1016/j.postharvbio.2006.07.002
issn: 0925-5214
Appears in Collections:(IF) Artículos
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