Roca M, Mínguez-Mosquera M I
Departamento de Biotecnología de Alimentos, Instituto de la Grasa (CSIC), Avenida Padre García Tejero, 4. 41012 Sevilla, Spain.
J Agric Food Chem. 2001 Sep;49(9):4414-9. doi: 10.1021/jf0100200.
Fruits of the Olea europaea Arbequina variety showed a carotenogenic stage overlapping the biosynthesis of anthocyanins. At the start of ripening, the carotenoid concentration increases (20%) or is maintained (besides the esterification of xanthophylls found in this variety), compared with a decrease (30%) found in the same period in the Picual variety (used as a control that was representative of the rest of the varieties). Both the beta,beta and beta,epsilon carotenoid series were found to be implicated in this carotenogenic process. Differences in both varieties for the chlorophyll a/b ratio, chlorophylls/carotenoids ratio, and relative carotenoid composition may indicate the existence of a different metabolism of chloroplast pigments, but also indicates a different structure and function of the photosynthetic apparatus. This fact shows that the photosynthetic behavior in the Picual variety is similar to that of shaded leaves, and in the Arbequina variety is similar to that of sun leaves.
油橄榄阿贝基纳品种的果实呈现出一个与花青素生物合成重叠的类胡萝卜素生成阶段。在成熟初期，与用作对照（代表其他品种）的皮夸尔品种同期出现的30%的下降相比，该品种的类胡萝卜素浓度增加了20%或保持不变（除了该品种中叶黄素的酯化作用）。发现β,β和β,ε类胡萝卜素系列都参与了这个类胡萝卜素生成过程。两个品种在叶绿素a/b比率、叶绿素/类胡萝卜素比率以及相对类胡萝卜素组成方面的差异，可能表明叶绿体色素存在不同的代谢方式，但也表明光合器官的结构和功能有所不同。这一事实表明，皮夸尔品种的光合行为类似于遮荫叶片，而阿贝基纳品种的光合行为类似于向阳叶片。
