In vitro starch digestibility, estimated glycemic index and antioxidant potential of taro (Colocasia esculenta L. Schott) corm

WOS: 000343612800034PubMed ID: 25172708The purpose of this study was to determine some functional properties of taro (Colocasia esculenta L Schott) corm, which can be a good alternative to the other dietary carbohydrate sources with its high starch content. The total phenolic and flavonoid content of taro corm was found as 205 +/- 53 mg CAE/100 g and 61 +/- 9 mg CAE/100 g, respectively. The antioxidant capacity of corm was determined as 452 +/- 72 mM TEAC/100 g and 244 +/- 73 mM TEAC/100 g, by the scavenging activity against ABTS and DPPH radicals, respectively. The free glucose content of corms was less than 1%, whereas the 60% of dry matter was composed of starch. According to the results, the taro corms' starch was highly digestible and higher than the 50% of the starch was composed of rapidly digestible starch (RDS) fractions. The estimated glycemic index (eGI) of taro corm was 63.1 +/- 2.5, indicating taro corm as a medium GI food and a good dietary carbohydrate alternative especially for diabetic people. (C) 2014 Elsevier Ltd. All rights reserved.Scientific and Technological Research Council of Turkey-TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [TOVAG-107O812]; Ege University Science and Technology Center-EBILTEMEge University [2008/BIL/033]This work has been founded by The Scientific and Technological Research Council of Turkey-TUBITAK (Project no: TOVAG-107O812) and Ege University Science and Technology Center-EBILTEM (Project no: 2008/BIL/033). We thanks to agricultural engineer R. Erkan Erdogan for providing taro corms and Novozymes for providing termamyl, amyloglucosidase, and invertase enzymes. Authors are also participants in the FA1005 COST Action INFOGEST on food digestion