Research and application progress on efficacy of active substances in Dioscorea opposite Thunb
Yam(Dioscorea opposita Thunb.)is a traditional homologous crop of medicine and food in China,which contains many kinds of active substance such as polysaccharides and saponins.These substances have aroused widely interest of researchers due to their immune regulation,anti-tumor and anti-oxidation effects.Polysaccharides in yam have a wide range of active ingredients,but the structure is susceptible to the extraction method.Allantoin has been used clinically for the treatment of duodenal ulcers and has good developmental value,but the extraction method is inefficient.In this paper,polysaccharide,saponin,starch and allantoin from yam were selected as study objects.Their content,development prospect and importance of exerting efficacy,and extraction methods and efficacy were summarized.Meanwhile,medicine and food application of yam was expounded,which provided ideas and reference for efficient extraction and practical transformation and development of yam in the future.
yamactive substanceefficacymedicine and food applications
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