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1

Occurrence and characterization of Colletotrichum dematium (Fr.) grove

100%
Machowicz-Stefaniak Z.
Polish Journal of Microbiology
|
2010
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tom 59
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nr 3
Colletotrichum dematium was isolated from caraway for the first time in Poland in 2005. Isolations of this fungus were repeated in 2006 and 2007. The cultures of fungus were obtained from superficially disinfected leaves, root necks, roots, stems and umbels. The isolates were identified on culture media: PDA and malt agar with addition of pieces of caraway stems and on the base of macro and microscopic structures. Studies on the biotic effect between C. dematium and other species of phyllosphere fungi of caraway showed that the majority of the studied species limited the growth and development of C. dematium, but the size of the limiting effect was different. The species from Trichoderma and Gliocladium genera were the most effective against C. dematium, causing degeneration and lysis of hyphae and precluded the formation of the pathogen's acervuli and conidia. C. dematium in dual culture with E. purpurascens, A. radicina, S. sclerotiorum, B. cinerea and R. solani produced an inhibition zone which indicated its capacity for antibiosis.
2

The effect of storage of bee pollen extracts on polyphenol content

100%
Rzepecka-Stojko A., Stec M., Kurzeja E., Gawronska E., Pawlowska-Goral K.
Polish Journal of Environmental Studies
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2012
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tom 21
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nr 4
Bee pollen belongs to bee products that are characterized by high nutritional value and biotic activity. These characteristics result from the wide variety of compounds that bee pollen contains. Our study determined the effects of storage conditions of bee pollen extracts on polyphenol content. The study was conducted with the use of three types of bee pollen extracts, namely ethanol extracts, enzymatic hydrolysates from pollen, and ethanol extract of pepsin-digested bee pollen. Polyphenol content in the studied extracts was determined immediately after extraction and after 12-month storage. We have concluded that 12- month storage of bee pollen extracts decreases polyphenol concentration in all three types of extracts, and the changes depend on the storage conditions.
3
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The occurrence and biotic activity of Phomopsis diachenii Sacc.

100%
Machowicz-Stefaniak Z.
Acta Agrobotanica
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2009
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tom 62
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nr 2
Phomopsis diachenii was isolated from caraway cultivars Konczewicki, firstly in 2006 and next in 2007. Single cultures were obtained from the roots and the stem base of eight six-week-old seedlings and from the stems of two plants with symptoms of necrosis, in the second year of planting. This fungus was isolated from the plant parts superficially disinfected on malt agar medium with an addition 0.01% of streptomycin. The identification of the species was made on PDA medium. The biotic interactions between P. diachenii and S. carvi and other species of phyllosphere fungi of caraway were studied. Interactions among the fungi, i.e. between P. diachenii and one of the fungi representing the studied community, were examined using the biotic series method. The biotic effects of the fungi in dual cultures were evaluated after 10 and 20 days of common growth and were expressed as the individual biotic effect (IBE). It was shown that P. diachenii is a weak competitor because its growth was limited by numerous species of phyllosphere fungi. The obtained results indicated the dominance of biotic activity of P. diachenii over that of S. carvi. It is possible that P. diachenii has a greater ability to survive in the phyllosphere fungal community than S. carvi, causing septoriosis of caraway.
4

Improvement of Trichoderma viride biotic activity by copper sulfate introduction into soil

100%
Peciulyte D., Lugauskas A.
Bulletin of the Polish Academy of Sciences. Biological Sciences
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2001
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tom 49
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nr 4
5

Biotic activity of fungal communities against a pathogen - a proposal of evaluation with the use of biotic effect coefficients

84%
Sierota Z.
Phytopathologia Polonica
|
1996
|
tom 12
6
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Occurrence and characterization of Colletotrichum fuscum

67%
Zimowska B., Zalewska D., Krol E. D.
Acta Scientiarum Polonorum. Hortorum Cultus
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2016
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tom 15
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nr 4
During 2012–2014 in southeastern Poland the species Colletotrichum fuscum was isolated from the leaves of oregano (Origanum vulgare L.) showing the symptoms of necrotic, concentrically zoned spots with a lighter center and a slightly raised edge. Morphology of nine randomly chosen isolates from the fungus population and reference isolate CBS obtained from CBS-KNAW Fungal Biodiversity Centre were studied. Each isolate was cultured on PDA medium, at the temperatures 24°C for 14 days. The character of the cultures, the color of the averse and the reverse, the formation of morphological structures of the fungus, i.e. acervuli, conidia, appressoria and chlamydospores were studied. Ultrastructural observations of morphological structures were undertaken using scanning electron microscopy. The presence of setose acervuli, conidia, chlamydospores and appressoria was visible. Moreover, studies on the biotic effect between C. fuscum and other species of phyllosphere fungi of oregano showed that all tested fungi inhibited the growth of C. fuscum, but the size of the limiting effect was different. Fungi from genera Trichoderma and Clonostachys were found out to be the most effective and positive antagonists. Alternaria alternata, Botrytis cinerea and Fusarium spp. – despite the high values of IBE were considered negative antagonists.
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