Faculty of Agriculture, University of Zagreb, Svetošimunska Cesta 25, 10000 Zagreb, Croatia.
Ministry of Agriculture, Directorate for Professional Support to the Development of Agriculture and Fisheries, Bani 110, Buzin, 10010 Zagreb, Croatia.
Molecules. 2023 Jun 27;28(13):5015. doi: 10.3390/molecules28135015.
Despite the high proportion of maize grain in animal diets, the contribution made by maize phytochemicals is neglected. Tocols and their contribution to the vitamin E content of animal diets are one example, exacerbated by sparse information on the tocol bioaccessibility of commercial hybrids. In this study, the contents of individual and total tocols and their bioaccessibility were determined in the grain samples of 103 commercial hybrids using a standardized INFOGEST digestion procedure. In the studied hybrids, total tocol content ranged from 19.24 to 54.44 µg/g of dry matter. The contents of micellar α-, γ-, δ-tocopherols, γ-tocotrienol, and total tocols correlated positively with the corresponding contents in the grain samples of the studied hybrids. In contrast, a negative correlation was observed between the bioaccessibility of γ- tocopherol, α- and γ-tocotrienol, and total tocols, along with the corresponding contents in the grain of studied hybrids. The highest bioaccessibility was exhibited by γ-tocotrienol (532.77 g/kg), followed by δ-tocopherol (529.88 g/kg), γ-tocopherol (461.76 g/kg), α-tocopherol (406.49 g/kg), and α-tocotrienol (359.07 g/kg). Overall, there are significant differences in the content and bioaccessibility of total and individual tocols among commercial maize hybrids, allowing the selection of hybrids for animal production based not only on crude chemical composition but also on the content of phytochemicals.
尽管玉米谷物在动物饲料中占很大比例，但玉米植物化学物质的作用却被忽视了。生育酚及其对动物饲料中维生素 E 含量的贡献就是一个例子，而商业杂交种生育酚生物可及性的信息稀缺更是加剧了这一问题。在这项研究中，使用标准化的 INFOGEST 消化程序，测定了 103 个商业杂交种的谷物样本中各生育酚和总生育酚及其生物可及性的含量。在所研究的杂交种中，总生育酚含量范围为 19.24 至 54.44μg/g 干物质。胶束 α-、γ-、δ-生育酚、γ-生育三烯酚和总生育酚的含量与研究杂交种中相应谷物样品的含量呈正相关。相反，γ-生育酚、α-和γ-生育三烯酚以及总生育酚的生物可及性与其在研究杂交种中的相应含量呈负相关。γ-生育三烯酚的生物可及性最高（532.77μg/kg），其次是δ-生育酚（529.88μg/kg）、γ-生育酚（461.76μg/kg）、α-生育酚（406.49μg/kg）和α-生育三烯酚（359.07μg/kg）。总的来说，商业玉米杂交种中总生育酚和各生育酚的含量和生物可及性存在显著差异，这使得人们不仅可以根据粗化学成分，还可以根据植物化学物质的含量来选择适合动物生产的杂交种。
