Palaniswamy U R, McAvoy R J, Bible B B
School of Allied Health-Asian American Studies Institute and Department of Plant Science, University of Connecticut, Storrs, Connecticut 06269, USA.
J Agric Food Chem. 2001 Jul;49(7):3490-3. doi: 10.1021/jf0102113.
Purslane is a nutritious vegetable crop rich in the polyunsaturated essential fatty acids (PUEFA) alpha-linolenic acid (LNA) and linoleic acid (LA), which are essential for normal human growth, health promotion, and disease prevention. Total lipids and fatty acid concentrations at three stages of harvest (6-, 10-, and 14-true-leaf stages) were examined in a cultivated variety of purslane (Portulaca oleraceae L. var. sativa). The 14-true-leaf stage of growth was found to be ideal for harvest because at this stage the leaf area, shoot fresh weight, shoot dry weight, and PUEFA concentrations per gram of leaf fresh weight were higher (P < or = 0.05) than at the 6- and 10-true-leaf stages of growth. The LNA to LA ratio was also highest at the 14-true-leaf stage.
马齿苋是一种营养丰富的蔬菜作物，富含多不饱和必需脂肪酸（PUEFA）α-亚麻酸（LNA）和亚油酸（LA），这些对人体正常生长、促进健康和预防疾病至关重要。对马齿苋栽培品种（Portulaca oleraceae L. var. sativa）在三个收获阶段（6片真叶期、10片真叶期和14片真叶期）的总脂质和脂肪酸浓度进行了检测。结果发现，14片真叶期是理想的收获期，因为在此阶段，叶面积、地上部鲜重、地上部干重以及每克叶片鲜重中的PUEFA浓度均高于（P≤0.05）6片真叶期和10片真叶期。14片真叶期的LNA与LA比值也最高。
