GROWTH INHIBITION OF PATHOGENIC ROOT FUNGI BY EXTRACTS OF ECTOMYCORRHIZAL FUNGI OR Picea glehnii INOCULATED WITH ECTOMYCORRHIZAL FUNGI*
AbstractThisÂ workÂ soughtÂ toÂ verifyÂ theÂ presenceÂ ofÂ compoundsÂ withÂ antimicrobialÂ propertiesÂ inÂ extractsÂ of ectomycorrhizalÂ fungiÂ orÂ inÂ PiceaÂ glehniiÂ inoculatedÂ withÂ ectomycorrhizalÂ fungi.Â ExtractsÂ fromÂ Pisolithus tinctorius, Scleroderma flavidum, Amanita pantherina and Paxillus sp., grown in liquid culture media, and from P. glehnii seedlings inoculated or not with the above ectomycorrhizal fungi and cultivated in in vitro condition, were processed to obtainÂ twoÂ fractions, water and ethyl acetate solubles. TheseÂ fractions were testedÂ for the presence of inhibitoryÂ constituentsÂ againstÂ FusariumÂ roseum,Â PythiumÂ sp.Â andÂ RhizoctoniaÂ solani.Â DirectÂ bioautography technique on TLC or paper disc technique was used, depending on the extract and pathogenic fungi tested. The results showed the production on inhibitory components, not only by ectomycorrhizal fungi, but also by P. glehnii inoculated or not with ectomycorrhizal fungi. The sensitivity varied considerably according to the type of fungus or extract.Key words: Japan/Mycorrhizas/Inh|bition/Extracts/Antimicrobial compounds/Amanita pantherina/Pisolithus tinctorius/Paxillvs spJScleroderma flavidum/Fusarium roseum/Pythium spJRhizoctonia solani.Â
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