Activity of antarctic fungi extracts against phytopathogenic bacteria

This study aims to obtain secondary metabolites extracts from filamentous fungi isolated from soil and marine sediments from Antarctic ecosystems and assess its potential antibacterial activity on Xanthomonas euvesicatoria and Xanthomonas axonopodis pv. passiflorae (phytopathogenic bacteria causing diseases in pepper and tomato, and passionfruit, respectively). Among the 66 crude intracellular and extracellular extracts obtained from fungi recovered from soil and 79 obtained from marine sediment samples, 25 showed the ability to prevent the growth of X. euvesicatoria in vitro and 28 showed the ability to prevent the growth of X. axonopodis pv. passiflorae in vitro. Intracellular and extracellular extracts from soil fungi inhibited around 97% of X. euvesicatoria and 98% of X. axonopodis pv. passiflorae at 2.1 mg/mL. The average inhibition rates against X. euvesicatoria and X. axonopodis pv. passiflorae for intracellular and extracellular extracts from marine sediments fungi was around 96 and 97%, respectively, at 3.0 mg/mL. Extracts containing secondary metabolites with antimicrobial activity against X. euvesicatoria and X. axonopodis pv. passiflorae were obtained, containing possible substitutes for the products currently used to control these phytopathogens.
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Source: Letters in Applied Microbiology - March 12, 2018 Category: Microbiology Authors: Jelena Puri ć, Gabrielle Vieira, Lúcia Bonci Cavalca, Lara Durães Sette, Henrique Ferreira, Maria Lúcia Carneiro Vieira, Daiane Cristina Sass Tags: Original Article Source Type: research