Nutritional quality of outer and inner leaves of green and red pigmented lettuces (Lactuca sativa L.) consumed as salads
Nutritional quality of outer and inner leaves of green and red pigmented lettuces (Lactuca sativa L.) consumed as salads
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DOI：
10.1016/j.scienta.2012.12.023
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发表时间：
2013-02-28
影响因子：
4.3
通讯作者：
Goicoechea, Nieves
中科院分区：
文献类型：
--
作者：
Baslam, Marouane;Morales, Fermin;Goicoechea, Nieves
莴苣（Lactuca sativa L.）是欧盟的主要粮食作物。本研究的目的是测试三种作为沙拉食用的生菜的潜在营养品质：长叶莴苣（通常称为Cogollos de Tudela）和两个品种的莴苣（Batavia Rubia Munguia和Maravilla de Verano）。测试了糖、蛋白质、矿物质和抗氧化化合物（类胡萝卜素、叶绿素、酚类物质、花青素和抗坏血酸）在内外叶之间的分布。每个品种或栽培的潜在效益是由于叶片中积累的不同化合物。土地菜的外叶和内叶中Mg和Ca的含量高于其他品种，内叶中Mn、叶绿素和类胡萝卜素的含量高于其他品种。巴达维亚（Batavia Rubia Munguia）外叶Na含量低，K、Mg、Ca、Fe和Zn含量高，是内叶和外叶水分积累量最高的品种。马拉维拉外叶花青素和抗坏血酸含量最高。在这三个品种中，一些潜在有益化合物在叶外的含量高于叶内的含量。因此，当生菜作为沙拉食用或作为“第四类”蔬菜的粮食作物时，应该重新考虑完全消除外部叶子。(C) 2012 Elsevier B.V.版权所有
Lettuce (Lactuca sativa L.) is a major food crop within the European Union. The objective of this study was to test the potential nutritional quality of three types of lettuce consumed as salads: Lactuca sativa L. var. longifolia (commonly named Cogollos de Tudela) and two cultivars of Lactuca sativa L. var. capitata (Batavia Rubia Munguia and Maravilla de Verano). Distribution of sugars, proteins, minerals and antioxidant compounds (carotenoids, chlorophylls, phenolics, anthocyanins and ascorbate) between outer and inner leaves was tested. The potential benefits of each variety or cultivar were due to different compounds accumulated in leaves. Cogollos de Tudela showed higher levels of Mg and Ca in both external and internal leaves, and greater concentrations of Mn, chlorophylls and carotenoids in inner leaves than lettuces belonging to the var. capitata. Batavia Rubia Munguia had low quantity of Na and an important amount of K, Mg, Ca, Fe and Zn in outer leaves and it was the cultivar that accumulated the highest quantity of water in both outer and inner leaves. Maravilla de Verano showed the greatest contents of anthocyanins and ascorbate in external leaves. In the three cultivars some of the potentially beneficial compounds appeared in higher levels in the outer than in the inner leaves. Therefore, the complete elimination of the external leaves should be reconsidered when lettuces are consumed as salads or used as food crop for the 'Fourth Range' of vegetables. (C) 2012 Elsevier B.V. All rights reserved.