4.7 Article

Carrot rhamnogalacturonan I structure and composition changed during 2017 in California

期刊

FOOD HYDROCOLLOIDS
卷 137, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2022.108411

关键词

Carrot; Pectin; Rhamnogalacturonan; Dietary fiber; Oligosaccharide

向作者/读者索取更多资源

Detailed analysis of carrot pomace fiber remaining after commercial juice extraction revealed that enzyme-treated pomace contained branched, unsaturated, partially acetylated and methylated rhamnogalacturonan I (RG-I) with arabinogalacto-oligosaccharide side chains, as well as other oligosaccharides. Enzymatic treatment decreased molecular weight and increased water solubility of the fiber. Insoluble and total dietary fiber increased during the year, while soluble dietary fiber remained relatively constant. The structure of carrot pomace fiber changed between harvests and its susceptibility to enzymatic degradation increased. The diversity of RG-I structures was greatest in the enzyme-treated pomace harvested in September. These findings suggest that carrot pomace fiber has potential as a low viscosity food ingredient and may possess various health benefits.
Detailed composition, fine structure, and function were determined for carrot pomace fiber remaining after commercial juice extraction from carrots harvested at four different times during 2017, in different California, USA locations. This pomace was treated with commercial enzymes and the changes in carbohydrate composition were analyzed. The enzyme-treated carrot pomace contained pectic oligosaccharides that were branched, unsaturated, partially acetylated and methylated rhamnogalacturonan I (RG-I) with arabinogalacto-oligosaccharide side chains as well as free galacto-oligosaccharides and galacturono-oligosaccharides detected by MALDI-TOF MS and NMR analysis. The molecular weight and degree of galacto-oligosaccharide polymerization decreased while water solubility increased following enzymatic treatment. While carrot soluble dietary fiber remained relatively constant, insoluble dietary fiber and total dietary fiber increased during the year. The carrot pomace fiber structure changed between the June and September harvests so that it was more susceptible to enzymatic degradation, and its shape became more linear. The diversity of carrot RG-I oligosaccharide structures was the greatest in the enzyme-treated pomace harvested in September and the RG-I became almost completely debranched by the enzyme treatment for the pomace harvested in December. The structural properties of these carrot pomace fiber fractions suggest that they can function as a low viscosity beverage food ingredient, and the rhamnogalacturonan I structure indicated the potential for anti-viral, immuno-modulatory and prebiotic properties. The rhamnogalacturonan structural composition changes during the growing season highlights the need for bioactivity monitoring of carrot pomace obtained from different sources, and harvested at different times during the year.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据