Comparison of the total phenolic and ascorbic acid content of freeze-dried and air-dried marionberry, strawberry, and corn grown using conventional, organic, and sustainable agricultural practices
Comparison of the total phenolic and ascorbic acid content of freeze-dried and air-dried marionberry, strawberry, and corn grown using conventional, organic, and sustainable agricultural practices
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DOI：
10.1021/jf020635c
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发表时间：
2003-02-26
影响因子：
6.1
通讯作者：
Mitchell, AE
中科院分区：
文献类型：
--
作者：
Asami, DK;Hong, YJ;Mitchell, AE
次生酚类代谢物在植物防御机制中起着重要作用，越来越多的证据表明，许多次生酚类代谢物对人类健康也很重要。到目前为止，很少有研究调查各种农业实践对植物次生代谢物水平的影响。为了解决这个问题，对采用可持续、有机或常规种植方式种植的马里昂莓、草莓和玉米的总酚（TP）含量进行了测量。此外，还研究了三种常见的采后加工处理（冷冻、冻干和风干）对这些农产品总酚含量的影响。与常规农业实践生产的食品相比，在有机和可持续种植的食品中始终发现总酚含量在统计学上更高。在所有样本中，与风干相比，冻干能保留更高水平的总酚。
Secondary phenolic metabolites play an important role in plant defense mechanisms, and increasing evidence indicates that many are important in human health. To date, few studies have investigated the impact of various agricultural practices on levels of secondary plant metabolites. To address this issue, the total phenolic (TP) content of marionberries, strawberries, and corn grown by sustainable, organic, or conventional cultural practices were measured. Additionally, the effects of three common postharvest processing treatments (freezing, freeze-drying, and air-drying) on the TP content of these agricultural products were also investigated. Statistically higher levels of TPs were consistently found in organically and sustainably grown foods as compared to those produced by conventional agricultural practices. In all samples, freeze-drying preserved higher levels of TPs in comparison with air-drying.