Hanna Rekosz-Burlaga

Warsaw University of Life Sciences

Małgorzata Borys

Warsaw University of Life Sciences

Agata Goryluk-Salmonowicz

Warsaw University of Life Sciences


The present investigation was carried out to analyse the presence of endophytes in the above-ground parts of Hipericum perforatum and to analyse the biodiversity and enumeration of epiphytes. Plant material was collected in Poland three times during the growing season. Phenotypic and genotypic diversity of all the endophytes and the most abundant epiphytes were researched. We analysed fungistatic activity of this isolates. From the endosphere of tested plant Alcaligenes  faecalis and Bacillus licheniformis were isolated. The most numerous epiphytes were the copiotrophs and a bit less numerous were oligotrophs, bacteria cultivated on Bunt and Rovir’s medium and fungi. The least numerous bacteria were Azotobacter sp. Among all the molds dominant were: Cladosporium

herbarum, C. cladosporioides and Alternaria consortialis, A. alternata, Clonostachys rosea f. catenulata (Gliocladium catenulatum), Scopulariopsis brevicaulis and Penicillium terrestre. Among phyllobacteria there were found mostly the following species: Burkholderia cepacia, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas fluorescens, P. putida, Pantoea agglomerans, Paenibacillus polymyxa, Bacillus cereus, Rhodococcus sp., R. erythropolis and Cellulosimicrobium cellulans. The broadest spectrum of antifungal activity was examined for the following species: Paenibacillus polymyxaPseudomonas putida and Pantoea agglomerans. P. polymyxa limited the growth of over 82% tested molds, so did the other two strains: P. agglomerans over 77% and P. putida over 73%.


microorganisms colonizing herbs, St. John’s wort, endophytes, epiphytes, fungistatic activity

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Hanna Rekosz-Burlaga 
Warsaw University of Life Sciences
Małgorzata Borys 
Warsaw University of Life Sciences
Agata Goryluk-Salmonowicz 
Warsaw University of Life Sciences



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