Phytochemical content, antioxidants and cell wall metabolism of two loquat (Eriobotrya japonica) cultivars under different storage regimes
Phytochemical content, antioxidants and cell wall metabolism of two loquat (Eriobotrya japonica) cultivars under different storage regimes
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DOI：
10.1016/j.foodchem.2014.01.054
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发表时间：
2014-07-15
期刊：
影响因子：
8.8
通讯作者：
Manganaris, G. A.
中科院分区：
文献类型：
--
作者：
Goulas, V.;Minas, I. S.;Manganaris, G. A.
研究了枇杷（Eriobotrya japonica cvs.‘Morphitiki’、‘Karantoki’）在不同贮藏条件下的贮藏效果。在商业成熟期收获果实，并在室温（RT，类似于20 ° C）下保持1、3、5、7和11天后或在冷藏（4 ° C下14天）和在RT下另外成熟1、3和5天后分别进行分析。成分分析显示品种差异很大，“Morphitiki”水果更酸，总酚类物质，黄酮类化合物和羟基肉桂酸衍生物的含量较高，以及更大的抗氧化效力。虽然硬度没有明显变化，在存储过程中，细胞壁表现出广泛的重塑。在果胶主链中观察到的变化比在多糖苷酸侧链和交联聚糖中观察到的变化更大。多聚半乳糖醛酸酶（PG）表现出更好的关联与细胞壁溶解在RT比参与阿拉伯聚糖或半乳聚糖拆卸的酶。在采后成熟过程中，‘Karantoki’比‘Morphitiki’表现出更广泛的果胶溶解。有趣的是，冷藏抑制细胞壁解体在“Karantoki”，但不是在“Morphitiki”，这表明品种可能不同，在他们的易感性与冷却相关的壁疾病。低温引起的壁解体的变化可能会影响果汁和植物化学物质的释放消费。(C)2014爱思唯尔有限公司版权所有。
Changes in quality, phytochemical content and cell wall metabolism of two loquat cultivars (Eriobotrya japonica cvs. 'Morphitiki', 'Karantoki') under different storage regimes were studied. The fruit were harvested at commercial maturity stage and analyzed after 1, 3, 5, 7, and 11 days maintenance at room temperature (RT, similar to 20 degrees C) or after cold storage (14 days at 4 degrees C) and additional ripening at RT for 1, 3 and 5 days, respectively. Compositional analysis revealed substantial cultivar differences; the 'Morphitiki' fruit was more acidic and showed higher contents of total phenolics, flavonoids and hydroxycinnamic acid-derivatives as well as greater antioxidant potency. Although firmness did not change markedly during storage, the cell wall exhibited extensive remodeling. Greater changes were observed in the pectin backbones than in polyuronide side chains and cross-linking glycans. Polygalacturonase (PG) showed better association with cell wall solubilization at RT than the enzymes involved in arabinan or galactan disassembly. During postharvest ripening after harvest, 'Karantoki' showed more extensive pectin solubilization than 'Morphitiki'. Interestingly, cold storage inhibited the cell wall disassembly in 'Karantoki' but not in 'Morphitiki', suggesting that the cultivars may differ in their susceptibility to chilling-related wall disorders. Low temperature-induced alterations in wall disassembly may impact juice and phytochemical release upon consumption. (C) 2014 Elsevier Ltd. All rights reserved.