Natural antifungal compounds from the peel of yam tubers
1984
Ogundana, S.K. (University of Ife, Ile-Ife (Nigeria). Dept. of Microbiology) | Coxin, D.T. | Dennis, C. (A.R.C. Food Research Institute, Norwich (UK))
Two phenolic compounds were isolated from the peel of Dioscorea rotundata tubers by thin layer chromatography. They acted as a fungicide against the bioassay organism Cladosporium cladosporioides and the pathogens causing storage rot of yams. The toxic compounds were identified with the aid of ultraviolet and infrared spectroscopy, nuclear magnetic resonance, and mass spectrometry: 2,5-dihydroxy- 4-methoxy- 9,10-dihydrophenanthrene and 7-hydroxy-2-4,6-trimethoxyphenanthrene. Both compounds were found to be absent in the yam flesh.
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