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首页> 美国卫生研究院文献>Nutrients >Life after Harvest: Circadian Regulation in Photosynthetic Pigments of Rocket Leaves during Supermarket Storage Affects the Nutritional Quality
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Life after Harvest: Circadian Regulation in Photosynthetic Pigments of Rocket Leaves during Supermarket Storage Affects the Nutritional Quality

机译：收获后的生活：超市贮藏期间火箭叶光合色素的昼夜节律影响营养品质

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摘要

Vegetables, once harvested and stored on supermarket shelves, continue to perform biochemical adjustments due to their modular nature and their ability to retain physiological autonomy. They can live after being harvested. In particular, the content of some essential nutraceuticals, such as carotenoids, can be altered in response to environmental or internal stimuli. Therefore, in the present study, we wondered whether endogenous rhythms continue to operate in commercial vegetables and if so, whether vegetable nutritional quality could be altered by such cycles. Our experimental model consisted of rocket leaves entrained under light/darkness cycles of 12/12 h over 3 days, and then we examined free-run oscillations for 2 days under continuous light or continuous darkness, which led to chlorophyll and carotenoid oscillations in both constant conditions. Given the importance of preserving food quality, the existence of such internal rhythms during continuous conditions may open new research perspective in nutrition science. However, while chromatographic techniques employed to determine pigment composition are accurate, they are also time-consuming and expensive. Here we propose for the first time an alternative method to estimate pigment content and the nutritional quality by the use of non-destructive and in situ optical techniques. These results are promising for nutritional quality assessments.
机译：蔬菜一旦收获并存储在超市的货架上，由于其模块性质和保持生理自主性的能力，它们将继续进行生化调节。他们可以在收获后生活。尤其是，某些必需的营养保健品（例如类胡萝卜素）的含量可根据环境或内部刺激而改变。因此，在本研究中，我们想知道内源性节律是否在商业蔬菜中继续起作用，如果是，是否可以通过这种循环来改变蔬菜的营养质量。我们的实验模型由在3天的12/12 h的明/暗循环中夹带的火箭叶片组成，然后我们在连续的光照或连续的黑暗下检查了2天的自由运行振荡，这导致了恒定的叶绿素和类胡萝卜素振荡条件。考虑到保持食品质量的重要性，在连续条件下这种内部节律的存在可能会为营养科学打开新的研究视野。然而，尽管用于确定颜料组成的色谱技术是准确的，但它们也是费时且昂贵的。在这里，我们首次提出了使用非破坏性和原位光学技术估算色素含量和营养品质的替代方法。这些结果对于营养质量评估很有希望。

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