Open AccessEffect of oleic acid on vegetative growth of the aphid‐pathogenic fungus Erynia neoaphidis
Author(s) -
Gray Simon N.,
Robinson Peter,
Wilding Neil,
Markham Paul
Publication year - 1990
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1990.tb04136.x
Subject(s) - fungus , oleic acid , aphid , yeast extract , pathogenic fungus , growth medium , liquid culture , food science , entomopathogenic fungus , liquid medium , biology , fatty acid , toxicity , botany , microbiology and biotechnology , chemistry , biochemistry , chromatography , bacteria , biological pest control , organic chemistry , fermentation , genetics , beauveria bassiana
The aphid‐pathogenic fungus Erynia neophidis grew on a semi‐defined medium containing 16 g·1 −1 glucose, 3 g·1 −1 yeast extract and 5 g·1 − mycological peptone only when the medium was supplemented with low concentrations of certain fatty acids. Of these, oleic acid fulfilled the growth requirement at a concentration of 0.02% (v/v), but higher concentrations were toxic, causing complete loss of viability of cultures at a concentration of 0.2% (v/v) in liquid medium and at 4% (v/v) on solid medium. The reduced viability of the fungus in liquid culture compared to that on equivalent solid medium, and at low inoculum density compared to high inoculum density in liquid medium, is explicable in terms of this toxicity.