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首页> 外文期刊>Postharvest Biology and Technology >Involvement of abscisic acid in postharvest water-deficit stress associated with the accumulation of anthocyanins in strawberry fruit
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Involvement of abscisic acid in postharvest water-deficit stress associated with the accumulation of anthocyanins in strawberry fruit

机译：脱落酸在采后水缺陷应激与草莓果汁中的花青素的积累相关

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摘要

Fruits are prone to suffer water-deficit stress and accelerated senescence after harvest. To understand the effect of postharvest water-deficit on the senescence progress of strawberry fruit, fruit peduncles were dipped into water or abscisic acid solution and stored at 20 degrees C with 50% relative humidity in the dark. The results showed that detached fruit without water supply through the peduncles suffered serious waterdeficit stress with great weight loss and low moisture content. However, fruit absorbing water through their peduncles successfully avoided the water-deficit stress with a slight change of weight loss and moisture content. Water-deficit significantly promoted anthocyanin levels with increased PAL C4H and DFR activities. The expressions of transcriptional factors that regulate a nthocyanin biosynthesis (FaMYB1, FabHLH3 and FaITG1) were also up-regulated under water-deficit stress. Meanwhile, stress elevated the abscisic acid level as well as FaNCED1 and FaASR expression in strawberry fruit. Furthermore, exogenous ABA application exhibited the similar features with water-deficit stress. These results suggested that postharvest water-deficit would accelerate anthocyanin accumulation in strawberry fruit and that abscisic acid may play a role in the response to water-deficit stress. (C) 2015 Published by Elsevier B.V.
机译：在收获后，果实易于遭受水缺陷的压力和加速衰老。要了解采后水缺水对草莓果实衰老进展的影响，将水果花序浸入水或脱硅酸溶液中，并在20℃下储存，在黑暗中具有50％的相对湿度。结果表明，通过步行的脱离的水果，通过花序梗阻遭受严重的水土界应力，重量损失和低水分含量。然而，通过它们的花序果实的水果吸收水成功地避免了水 - 缺陷胁迫，随着体重减轻和水分含量的略有变化。水缺陷显着促进了PAL C4H和DFR活性增加的花青素水平。调节Nthocyanin生物合成（FamyB1，FabhlH3和Faitg1）的转录因子的表达也在水 - 缺陷应激下调节。同时，压力升高了脱落酸水平以及草莓果实中的施联1和FAASR表达。此外，外源ABA应用表现出具有防水应力的类似特征。这些结果表明，采后水缺陷会加速草莓果实中的花青素积累，并且脱落酸可能在对水缺陷应力的反应中发挥作用。 （c）2015年由elestvier b.v出版。

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