Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8881973 | Postharvest Biology and Technology | 2018 | 8 Pages |
Abstract
The possibility to modify plant metabolic profile of plants and fruit to improve their healthy properties using eco-friendly tools, rather than transgenic approaches, gained interest in the last decades. Ultraviolet-B (UV-B) radiation, at low levels, thanks to its ability to influence plant secondary metabolism, could be successfully used to achieve this goal. However, few studies have been conducted so far on the effects of post-harvest UV-B treatments on fruit metabolomics. The present research, aimed to evaluate the impact of UV-B on peach metabolites profile through non-targeted metabolomics (UHPLC-ESI/QTOF-MS) coupled with multivariate chemometrics, provided evidence that 10 and 60â¯min of post-harvest UV-B irradiation influenced several classes of metabolites. Most phenolics were down-accumulated 24â¯h after both UV-B treatments, though, after 36â¯h, anthocyanins, flavones and dihydroflavonols increased (2.06â, 1.92â, 1.68-fold with 10â¯min UV-B; 6.65â, 2.53â, 2.05-fold with 60â¯min UV-B, respectively). UV-B reduced carotenoids and most lipids and increased some biosynthetic intermediates and degradation products, some of them known for their positive role in human health. Among alkaloids, some pteridines accumulated, likely derived from folates degradation, while indole alkaloids decreased. Despite the decrease of some bioprotective metabolites as carotenoids, the UV-B-induced up-accumulation of many antioxidant phenolics after 36â¯h from the exposure suggests an improvement of the healthy properties of peach fruit and reinforces the potential of UV-B controlled irradiation as a nutraceuticals-increasing tool in fruit.
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Authors
M. Santin, L. Lucini, A. Castagna, G. Chiodelli, M-T. Hauser, A. Ranieri,