Abstract:
Controlled atmosphere (CA) has not been implemented so far for storage of grapes, partly because the threshold for prevention of decay can overlap the accumulation of off-flavors. 'Sable Seedless®' was stored under ambient atmosphere or under CA conditions of 5 kPa O2 and 5, 10 and 15 kPa of CO2. The level of decay in the experiment was low, in part because the fruit were sanitized with ethanol before storage. Off-flavors developed in grapes stored at the high CO2 level and the berries were sampled for volatile and non-volatile metabolites. Volatile compounds associated with off-flavor were mainly pyruvate degradation products which accumulated in the high CO2 atmosphere. Analysis of phenylpropanoid metabolites suggested that flavonols and anthocyanins were lower in fruit stored in the high CO2 CA conditions. Of the stilbenes, trans-resveratrol and piceatannol were higher in the control compared to the high CO2 CA conditions. These results point on potential markers for negative effects of CA in table grapes and that extreme CA conditions can modulate the phenylpropanoid pathway.

到目前為止，還沒有對葡萄的貯藏實(shí)施控制性大氣(CA)，部分原因是防止腐爛的門檻可能與異味的積累重疊Sable Seedless葡萄是在環(huán)境空氣或5千帕氧氣和5千帕、10千帕和15千帕二氧化碳的條件下儲存的。實(shí)驗(yàn)中腐爛程度較低，部分原因是果實(shí)在貯藏前用乙醇消毒。在高二氧化碳水平下貯藏的葡萄和漿果中產(chǎn)生的異味被采集到揮發(fā)性和非揮發(fā)性代謝物中。與異味有關(guān)的揮發(fā)性物質(zhì)主要是丙酮酸降解產(chǎn)物，在高CO2氣氛中積累。苯丙酸代謝產(chǎn)物分析表明，在高CO2-CA條件下貯藏的果實(shí)中黃酮醇和花青素含量較低。在二苯乙烯類化合物中，反式白藜蘆醇和苦楝醇在對照組中的含量高于高CO2-CA條件。這些結(jié)果表明，在表生葡萄中鈣的潛在負(fù)效應(yīng)標(biāo)記和鈣條件可以調(diào)節(jié)苯丙酸途徑。

Keywords:GC/MS, postharvest, volatile compounds, controlled atmosphere, table grapes

關(guān)鍵詞：GC/MS、采后、揮發(fā)性化合物、控制氣氛、食用葡萄

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受控氣氛對SableSeedless無核葡萄品質(zhì)相關(guān)代謝產(chǎn)物的影響

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