Abstract

Abstract Yacon (Polymnia sonchifolia) plants originating from Andean highlands are known to accumulate a large amount of oligofructans in their tubers and tuberous roots (Ohyama et al. 1990; Asami et al. 1992). Asami et al. (1992) have reported that tubers and tuberous roots which were harvested in late fall contained about 57 and 66% respectively (on a dry matter basis) of oligofructans. However, the tubers, tuberous roots and shoots of the yacon contained only a small amount of starch and inulin. The tuberous roots of yacon which resemble those of sweet potato in appearance are usually eaten raw and are expected to become commercially valuable as a source of oligofructans.

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