Effect of regulated deficit irrigation and crop load on the antioxidant compounds of peaches
Effect of regulated deficit irrigation and crop load on the antioxidant compounds of peaches
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DOI：
10.1021/jf800190f
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发表时间：
2008-05-28
影响因子：
6.1
通讯作者：
Gil, Maria I.
中科院分区：
文献类型：
--
作者：
Buendia, Begona;Allende, Ana;Gil, Maria I.
在水资源供应不足的地区，使用调节亏缺灌溉（RDI）策略正成为一种普遍做法。关于RDI对水果抗氧化剂含量的影响的信息很少。本研究考察了RDI对甜菜中维生素C、酚类化合物和类胡萝卜素含量的影响。两种灌溉策略，充分灌溉（FI）和RDI，在两个间伐水平，商业和一半的商业作物负荷进行了比较。RDI、策略对桃的维生素C、酚类物质和类胡萝卜素含量有影响。RDI引起果皮应激，降低了果皮中维生素C和类胡萝卜素的含量，增加了果皮中酚类物质的含量，主要是花青素和原花青素。单果重是唯一受作物负荷影响的品质指标，低作物负荷下单果重增加。一般来说，经济作物负荷的果实抗氧化剂含量略高于低作物负荷的果实，尽管这些影响仅在果皮中观察到。此外，还研究了植株水位、树干最大日收缩率（MDS）和汁液流量（SF）两种传感器控制灌溉对桃抗氧化成分的影响。果实对SF传感器的响应与RDI策略相似。根据测试的水分传感器，SF并不是一个很好的用于灌溉调度的植物水分指标，因为它会导致酚类物质含量的增加，与RDI所观察到的水果相似。因此，RDI策略的选择和植物水分指标的选择都是影响桃抗氧化剂含量的重要因素。
The use of regulated deficit irrigation (RDI) strategies is becoming a common practice in areas with low water availability. Little information is available about the effects of RDI on the antioxidant content of fruits. In this study, the influence of RDI on the content of vitamin C, phenolic compounds and carotenoids was investigated. Two irrigation strategies, fully irrigated (FI) and RDI, were compared at two levels of thinning, commercial and half of the commercial crop load. RDI, strategies affected the content of vitamin C, phenolics and carotenoids of Flordastar peaches. RDI caused fruit peel stress lowering the content of vitamin C and carotenoids, while increasing the phenolic content, mainly anthocyanins and procyanidins. Fruit weight was the only quality index influenced by the crop load as it increased in FI fruits at low crop load. In general, fruits from commercial crop load had slightly higher content of antioxidants to fruits from low crop load, although these influences were only observed in the peel. Additionally, the influence of irrigation controlled by two sensors related to plant water level, maximum daily trunk shrinkage (MDS) and sap flow (SF) on the antioxidant constituents of peaches was evaluated. The response of the fruits to SF sensor was similar to that observed for RDI strategy. According to the tested water sensors, SF did not act as a good plant-based water indicator for use in irrigation scheduling, as it caused an increase in the content of phenolics, similar to that observed for fruits subjected to RDI. Therefore, selection of RDI strategies and plant water indicators should be taken into account as they affect the content of antioxidants of peaches.