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1

The development of bacteria with different food requirements as affected by the pH and type of soil

100%
Weyman-Kaczmarkowa W., Pedziwilk Z.
Acta Microbiologica Polonica
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1999
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tom 48
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nr 3
2

Response of soil bacteria to the application of various fungicides

100%
Kaszubiak H.
Polish Journal of Environmental Studies
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1998
|
tom 07
|
nr 3
In soil incubation experiments, some fungicides were found to be toxic to the nearly total fungal community, whereas others did not diminish its size. The reduction of fungi occurence always resulted in proliferation of copiotrophic typical bacteria with selection of fluorescent Pseudomonas. On the other hand, actinomycetes never responded positively to fungicides. Those effects were accompanied by a reduction of soil bacteria community as a whole. The increase instead of that reduction occured in the case when no reaction of fungi (and therefore copiotrophic bacteria) was noted. The reasons of such differentiated response of microorganisms are also discussed in this paper.
3
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Response of bacteria to soil contamination with heavy metals

67%
Wyszkowska J., Kucharski J., Borowik A., Boros E.
Journal of Elementology
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2008
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tom 13
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nr 3
The effect of contamination of loamy sand with single heavy metals (Cd2+, Cu2+, Zn2+, Pb2+) and with their mixtures on the number of copiotrophic, ammonifying, nitrogen immobilising, cellulolytic bacteria and bacteria of the Arthrobacter and Pseudomonas genera was examined in a pot experiment. The research was performed in two series: with soil sown with oat and unsown soil. It was found that the sensitivity of bacteria to Cd2+, Cu2+, Zn2+ and Pb2+ is a specific characteristic related to the content of these metals in soil and to the method of soil use. The development of the bacteria of Arthrobacter and Pseudomonas was most strongly inhibited in the soil sown with oat, while ammonifying, nitrogen immobilising, and cellulolytic bacteria were most inhibited in the unsown soil. Copiotrophic, cellulolytic, nitrogen immobilising and ammonifying bacteria proved to be more resistant to this contamination than bacteria of Arthrobacter and Pseudomonas genera. Increasing the number of heavy metals simultaneously contaminating the soil to two (Cd2+ and Cu2+; Cd2+ and Zn2+; Cd2+ and Pb2+) and to three (Cd2+, Cu2+ and Zn2+; Cd2+, Cu2+, and Pb2+; Cd2+, Pb2+ and Zn2+) generally did not increase the intensity of their effect on the examined bacteria. Changes brought about by these mixtures were usually similar to changes caused by individual heavy metals.
4

Correlation between biological properties of soil and degree of soil contamination with chromium

67%
Wyszkowska J., Kucharski J., Hlasko A., Jastrzebska E.
Natural Sciences
|
2001
|
tom 09
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