Spatial changes in leaf biochemical profile of two tea cultivars following cold storage under two different vapour pressure deficit (VPD) conditions

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dc.contributor.authorCollings, Emma R.
dc.contributor.authorAlamar, M. Carmen
dc.contributor.authorRedfern, Sally P.
dc.contributor.authorCools, Katherine
dc.contributor.authorTerry, Leon A
dc.date.accessioned2018-10-31T12:13:50Z
dc.date.available2018-10-31T12:13:50Z
dc.date.issued2018-10-22
dc.description.abstractWithering is considered a crucial stage of black tea processing. In this study, tea shoots from two cultivars (cvs. Yabukita and Clone 2) were stored at 5 °C, in either a low or high vapour pressure deficit (VPD) environment, to determine the impact of different withering rates on physiology (viz. respiration rate [RR], colour and moisture loss) and biochemical profile (viz. individual catechins, methylxanthines) of tea shoots (Camellia sinensis). Low VPD and high VPD conditions during withering increased caffeine levels in Clone 2 and Yabukita, respectively (p < 0.05). Caffeine levels steadily increased over time in both cultivars (p < 0.05), coinciding with a rapid decline in theobromine (TB). Furthermore, stems contained lower epigallocatechin gallate (EGCG) and caffeine (ca. 75 and 56%, respectively) compared to bud and larger leaf (LL) (p < 0.05). Overall, the results of this study highlight factors such as mechanical harvesting, and hard or soft withering, which could affect final tea beverage quality.en_UK
dc.identifier.citationCollings ER, Alamar MC, Redfern S, et al., (2019) Spatial changes in leaf biochemical profile of two tea cultivars following cold storage under two different vapour pressure deficit (VPD) conditions. Food Chemistry, Volume 277, March 2019, pp. 179-185en_UK
dc.identifier.cris21916812
dc.identifier.issn0308-8146
dc.identifier.urihttps://doi.org/10.1016/j.foodchem.2018.10.095
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13598
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectCatechinsen_UK
dc.subjectMethylxanthinesen_UK
dc.subjectCaffeineen_UK
dc.subjectTheobromineen_UK
dc.subjectColouren_UK
dc.subjectMetabolic rateen_UK
dc.titleSpatial changes in leaf biochemical profile of two tea cultivars following cold storage under two different vapour pressure deficit (VPD) conditionsen_UK
dc.typeArticleen_UK

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