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Antifungal activity of dihydrodioscorine extracted from a wild variety of Dioscorea bulbifera L
Author(s) -
Adeleye Adetoun,
Ikotun T.
Publication year - 1989
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620290504
Subject(s) - sclerotium , macrophomina phaseolina , potato dextrose agar , biology , pycnidium , fusarium , agar , horticulture , botany , conidium , bacteria , genetics
The bulbils and tubers of a wild variety of Dioscorea bulbifera L. contained an alkaloid, dihydrodioscorine. When crystallized in its hydrochloride form and incorporated into potato dextrose agar at a final concentration of 0.1%, it was found to slow down the rate of growth of five plant pathogenic fungi namely: Sclerotium rolfsii, Curvularia lunata, Fusarium moniliforme, Macrophomina phaseolina and Botryodiplodia theobromae. Also sclerotia formation in S. rolfsii was delayed and the number was reduced. Conidia formation in C. lunata and F. moniliforme was also delayed and reduced but pycnidia formation in M. phaseolina and B. theobromae was not affected. There was no significant difference between the rate of growth of the fungi on PDA incorporated with 0.01% final concentration of dihydrodioscorine and on control plates. Abbreviations: PDA = potato dextrose agar, D.D. = dihydrodioscorine dihydrochloride.