Edmund Strzelczyk

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Studies were carried out on B-group vitamin (thiamine, biotin, nicotinic acid, riboflavin, pantothenic acid) production by 3 strains of Azospirillum (one derived from coniferous ectomycorrhizae and two--from sporocarps of ectomycorrhizal fungi) grown in media of different pH (5.5, 6.5, 7.5) at different temperatures (10 degrees C, 20 degrees C, 26 degrees(More)
Studies on the occurrence, identity and potential nitrogenase activity of diazotrophic bacteria in soil and the root zone of Scots pine (Pinus sylvestris L.) and common oak (Quercus robur L.) were carried out. Diazotrophic bacteria were more numerous in soil and the root zone of oak than in those of pine. Most of the bacteria isolated from the roots of both(More)
Subsurface bacterial growth occurred in an N-free medium inoculated with interior tissues of big non-mycorrhizal roots (7 to 8 mm diameter) of 15-20 years-old Scots pine (Pinus sylvestris L.) growing on sand dunes at the Baltic Sea of Poland. The bacteria were not N2 fixers as determined by the acetylene reduction method. Light microscopic and scanning(More)
Cytokinin-like substances were produced in higher amounts by soil isolates than by those isolated from the rhizosphere and mycorrhizosphere. However more bacterial strains isolated from the rhizosphere and mycorrhizosphere were capable of synthesizing cytokinin-like compounds. A distinct effect of pH on the production of these substances was found. It is(More)
 Enzymatic (cellulolytic, pectolytic, proteolytic, chitinolytic and acid phosphatase) activities in the cultures of ten different ectendomycorrhizal strains (mainly Wilcoxina spp.) were studied. Although most of the fungi produced all these enzymes, their activities were low (milliunits per hour), with the exception of those of the pectolytic enzymes, which(More)
The production of enzymes involved in mycoparasitism by several strains of ectomycorrhizal fungi: Amanita muscaria (16-3), Laccaria laccata (9-12), L. laccata (9-1), Suillus bovinus (15-4), S. bovinus (15-3), S. luteus (14-7) on different substrates such as colloidal chitin, mycelia of Trichoderma harzianum, T. virens and Mucor hiemalis was examined.(More)
Fungi isolated from mycorrhizae of pine required tryptophan for auxin synthesis. More auxins were found in culture grown with pyrogallol than in those without this compound. The fungi studied produced also auxins from other than tryptophan compounds. Indole employed with serine was more suitable for the production of auxins than indole or anthranilic acid(More)
Production of auxins and gibberellin-like substances by mycorrhizal fungi, bacteria and actinomycetes isolated from the mycorrhizosphere of Scots pine was studied. Chromatography and biossays were used. Most of the organisms required tryptophan for auxins production. The highest biological activity exhibited substances located at Rf 0.2–0.4. The organisms(More)
Qualitative and quantitative studies were carried out on the production of auxins by Coryneform bacteria, the only bacterial types isolated from roots of pine seedlings. Almost all isolates were capable of producing auxins in tryptophan containing media. In media without this amino acid only trace or no auxins were produced. Most of the bacteria studied(More)