Influence of pigment composition on skin color in a wide range of fruit and vegetables
Influence of pigment composition on skin color in a wide range of fruit and vegetables
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DOI：
10.21273/jashs.122.4.594
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发表时间：
1997-07-01
影响因子：
1.9
通讯作者：
Triggs, CM
中科院分区：
文献类型：
--
作者：
Lancaster, JE;Lister, CE;Triggs, CM
水果和蔬菜的颜色是由叶绿素、类胡萝卜素和花青素色素组成的。颜色的仪器测量通常用于描述颜色变化的过程，如水果成熟。使用皮肤颜色测量来预测色素组成的变化的适用性进行了研究，使用了广泛的水果和蔬菜。使用Hunter Colorlab测量皮肤颜色，并表示为坐标X、Y、Z、L*、a*、B*、色度（C*）和色调角（h度）。提取相同的皮肤样品，并分析叶绿素，类胡萝卜素和花青素的浓度。为每组颜色变量和叶绿素、花青素和类胡萝卜素色素生成成对散点图。h度与花青苷浓度、L* 与叶绿素浓度log之间均呈线性关系。还计算了每个颜料变量和颜色变量集的多重回归。然而，没有唯一的线性组合的颜料，产生了一个独特的点，在颜色空间。相反，颜色空间中给定的一组坐标可以由许多颜料组合来解释。因此，给定的颜色测量不能用颜料的独特组合来描述。在解释三刺激色坐标时，在没有水果和蔬菜内的色素组合物的先验知识的情况下，在色素组合物中的简单变化方面应谨慎。水果和蔬菜的表面形貌在颜色测量中可能具有相当大的意义。
The color of fruits and vegetables results from the presence of chlorophyll, carotenoid, and anthocyanin pigments. Instrumental measurements of color are used routinely in describing processes of changing color, such as fruit ripening. The applicability of using skin color measurements to predict changes in pigment composition was investigated using a wide range of fruit and vegetables. Skin color was measured using a Hunter Colorlab and represented as the coordinates X, Y, Z, L*, a*, b*, chroma (C*), and hue angle (h degrees). Identical skin samples were extracted and analyzed for chlorophyll, carotenoid, and anthocyanin concentration. Sets of pairwise scatter plots were generated for each set of color variables and for the chlorophyll, anthocyanin, and carotenoid pigments. There were linear relationships between h degrees and anthocyanin concentration and between L* and log [chlorophyll concentration]. Multiple regressions for each pigment variable and sets of color variables also were calculated. However, there was no unique linear combination of pigments that gave rise to a unique point in the color space. Conversely, a given set of coordinates in the color space can be accounted for by many combinations of pigments. Therefore, a given color measurement cannot be described in terms of a unique combination of pigments. Caution is urged in interpreting tristimulus color coordinates in terms of a simple change in pigment composition without prior knowledge of the pigment composition within the fruits and vegetables. The surface topography of fruits and vegetables may be of considerable significance in measuring color.