7α-Acetylugandensolide and antimicrobial properties of Warburgia ugandensis extracts and isolates against sweet potato pathogens

dc.contributor.author	Opiyo, Sylvia A
dc.contributor.author	OA Manguro, Lawrence OA
dc.contributor.author	Owuor, Philip Okinda-
dc.contributor.author	Ateka, Elijah M
dc.contributor.author	Lemmen, Peter
dc.date.accessioned	2018-01-25T10:44:39Z
dc.date.available	2018-01-25T10:44:39Z
dc.date.issued	2011-06-15
dc.identifier.uri	https://repository.maseno.ac.ke/handle/123456789/266
dc.description.abstract	7α-Acetylugandensolide together with thirteen known drimane-type sesquiterpenes have been isolated from Warbugia ugandensis bark extracts. Their structures were established by spectroscopic and physical methods as well as comparison with data available in the literature. The in vitro antimicrobial activities of the extracts and isolates were investigated against fungi and bacteria which infect sweet potato. Ethyl acetate extract exhibited the highest (P≤ 0.05) antifungal and antibacterial activities compared to n-hexane and methanol extracts. Rhizopus stolonifer was more susceptible to ethyl acetate extract (inhibition zone= 24.5 mm) than Blitox which was used as a positive control. The minimum inhibitory concentration (MIC) for the isolates ranged between 12.5 and 200 μg/ml with the lowest MIC value of 12.5 μg/ml being observed with polygodial against Fusarium solani; …	en_US
dc.publisher	Elsevier	en_US
dc.title	7α-Acetylugandensolide and antimicrobial properties of Warburgia ugandensis extracts and isolates against sweet potato pathogens	en_US
dc.type	Article	en_US