The potential of Gembili (Dioscorea esculenta L.) and Dahlia (Dahlia spp L.) from Indonesia as prebiotic compound

Gembili (Dioscorea esculenta L) and dahlia (Dahlia L) are local plants that grow in Indonesia. This research was conducted to obtain the yield, inulin content, solubility, and white degree of gembili and dahlia by hot water, ethanol extraction, and compared by inulin commercial. This study used a completely randomized design with factorial, i.e., gembili from Gunungkidul and Sukoharjo; dahlia from Cibodas and Berastagi. The results showed that inulin extract of gembili gunungkidul, gembili sukoharjo, dahlia cibodas, and dahlia berastagi had a yield 10.84%, 10.53%, 29.00%, and 28.33%. The result showed that the inulin extract of samples was significantly different (P<0.05) on solubility and white degree. The results indicated that both gembili and dahlia contain inulin. The amount of inulin content of dahlia samples was higher in both dahlia cibodas and dahlia berastagi (21.84% and 21.14% db) than inulin gembili samples. Inulin extract from dahlia samples had higher solubility in both dahlia cibodas and dahlia berastagi (98.33% and 97.97% db) than inulin gembili models. However, the color test of inulin extract from gembili was lightness than inulin dahlia samples. It can be concluded that dahlia and gembili from Indonesia are potentially used as prebiotic sources.