Content of alpha-, beta-carotene, and dietary fiber in 18 sweetpotato varieties grown in Hawaii

摘要

Tuber nutrient composition was determined for 18 commercial varieties of sweet potatoes grown in Hawaii and harvested in spring or autumn. The varieties were grouped as having orange, yellow/white or purple flesh. beta-Carotene concentrations in orange-fleshed varieties (6.7-13.1 mg/100 g) were lower than previously published results for similar varieties grown in mainland USA. alpha-Carotene was identified in 2 orange-fleshed varieties of Hawaiian origin (0.3 and 1.5 mg/100 g). The soluble fibre content constituted 25-33% of the total fibre contents. However, in 2 purple-fleshed varieties the soluble fibre content was about half of the total fibre content. Total fibre contents were calculated, using the enzymatic-gravimetric method, to range from2.01 to 3.87 g/100 g.