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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Effect of Plant Age on the Quantity and Quality of Proteins Extracted from Sugar Beet (Beta vulgaris L.) Leaves
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Effect of Plant Age on the Quantity and Quality of Proteins Extracted from Sugar Beet (Beta vulgaris L.) Leaves

机译：种植年龄对甜菜叶片提取蛋白质数量和质量的影响

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摘要

Effects of the developmental stage (e.g., young, mature, or senescent) of leaves on their chemical composition have been described in the literature. This study focuses on the variation in chemical composition and quantity and quality of proteins extracted from leaves due to variation in plant age (i.e., harvesting time), using leaves from sugar beets grown in a field (Rhino, Arrival) and in a greenhouse (Isabella). Within the same variety (Rhino, field; Arrival, field; Isabella, greenhouse) the protein content was similar for leaves from young and old plants (22 +/- 1, 16 +/- 1, and 10 +/- 3% w/w db, respectively). Variation in final protein isolation yield was mostly due to variation in nitrogen extractability (28-56%), although no consistent correlation with plant age was found. A significant effect of plant age was observed on the quality (color) of the extracted protein, that is, brown (indicative of polyphenol oxidase activity) and yellow for extracts from old and young plants, respectively.
机译：在文献中已经描述了叶片的发育阶段（例如，年轻，成熟或衰老）对其化学组成的影响。这项研究的重点是使用田间（犀牛，到来）和温室中生长的甜菜的叶片，由于植物年龄（即收获时间）的变化，从叶片中提取的蛋白质的化学组成以及数量和质量的变化。伊莎贝拉）。在同一品种（犀牛，田间;到来，田间;伊莎贝拉，温室）内，幼龄和老龄植物叶片的蛋白质含量相似（22 +/- 1、16 +/- 1和10 +/- 3％w / w db）。最终分离蛋白产量的变化主要归因于氮提取率的变化（28-56％），尽管没有发现与植物年龄的相关性。观察到植物年龄对提取蛋白质的质量（颜色）有显着影响，即从老植物和年轻植物中提取的蛋白质分别为棕色（指示多酚氧化酶活性）和黄色。

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