GROWTH INHIBITION OF PATHOGENIC ROOT FUNGI BY EXTRACTS OF ECTOMYCORRHIZAL FUNGI OR Picea glehnii INOCULATED WITH ECTOMYCORRHIZAL FUNGI*

Authors

  • MARIA CATARINA MEGUMI KASUYA Dep. de Microbiologia, Universidade Federal de Vicosa, Vicosa, MG, 36570-000

DOI:

https://doi.org/10.11598/btb.1996.0.9.125

Abstract

This  work  sought  to  verify  the  presence  of  compounds  with  antimicrobial  properties  in  extracts  of ectomycorrhizal  fungi  or  in  Picea  glehnii  inoculated  with  ectomycorrhizal  fungi.  Extracts  from  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 obtain  two  fractions, water and ethyl acetate solubles. These  fractions were tested  for the presence of inhibitory  constituents  against  Fusarium  roseum,  Pythium  sp.  and  Rhizoctonia  solani.  Direct  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. 

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