Eucalyptus Essential Oil As Bio-stimulator Of The Growth Of In Vitro Ectomycorrhizal Fungi [Óleo Essencial De Eucalipto Como Bioestimulador Do Crescimento De Fungos Ectomicorrízicos In Vitro]

The secondary metabolites extracted from forest species known as micossimbiontes can stimulate the growth of in vitro ectomycorrhizal isolates. We determined the effect of concentration of Eucalyptus grandis essential oil in stimulating growth of the ectomycorrhizal Pisolithus sp. (UFSC Pt 24 and UFSC Pt 188), Pisolithus microcarpus (UFSC Pt 116) Chondrogaster angustiporus (UFSC Ch 163), Scleroderma citrinum (UFSC Sc 124) and Suillus sp. (UFSM RA RA UFSM 2.2 and 2.8) in liquid culture medium. After a period of 25 days of incubation, we evaluated the morphology and growth of the isolates. The addition of essential oil at concentrations from 20 to 30 μL L-1 promoted mycelial growth in vitro in isolated Pt 24 UFSC, UFSC Pt 116, Ch 163 UFSC, UFSC Sc 124, UFSM RA RA UFSM 2.2 and 2.8. The addition of essential oil at a concentration of 20 μL L-1 resulted in an increase in the diameter and branching hyphae of isolates UFSC Pt 116 and Pt 24 UFSC. 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