Abstract
Partially purified rubber seed lipoxygenase was used to bleach lesser yam tubers (Dioscorea esculenta) that were browned by storing the cut yam tubers at room temperature. There was increase in the bleaching of polyphenols extracted from the browned yam tubers as the enzyme concentration and time of the incubation of the enzyme were increased. Moreover, there was increase in the bleaching of the browned yam tubers as the enzyme concentration was increased. The browned yam tubers were completely bleached to their original yellow colour at the enzyme concentration of 15 unit /ml. Key Words: Rubber seed, lipoxygenase, lesser yam Bio-Research Vol.2(2) 2004: 15-18
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