Enzymatic activity and degradation of organic macromolecules by neustonic and planktonic bacteria in an estuarine lake

• Autorzy: Mudryk Z J , Skorczewski P.
• Języki publikacji: EN

Abstrakty

EN

Neustonic (film layer ~ 90 µm, surface layer ~ 240 µm) and planktonic bacteria (subsurface layer ~ 10–15 cm) participating in the processes of decomposition of organic macromolecular compounds, and their potential capability to synthesise extracellular enzymes were studied in a shallow estuarine lake (Lake Gardno – Baltic coast). The studied bacteria were capable of decomposing a wide spectrum of organic macromolecular compounds. Most bacteria inhabiting surface and subsurface water layers hydrolysed lipids, proteins and DNA. The microflora hydrolysing cellulose was represented by the least abundant group of organisms. Of the studied enzymes, alkaline and acid phosphatases, leucine arylaminase, esterase, and esterase lipase were synthesised most actively while β-glucouronidase (βGl) and α-fucosidase (αFu) were synthesized least actively. It can be clearly seen that enzymatic activity was stratified, and there were differences between studied water layers. Bacterial strains isolated from surface and subsurface layers were more active in synthesizing extracellular enzymes than bacteria inhabiting the film layer. Bacteria isolated from various parts of Lake Gardno synthesized the tested hydrolytic enzymes with a similar intensity.

Słowa kluczowe

EN

lake; organic matter decomposition; Lake Gardno; enzyme activity; estuarine lake; organic macromolecule; planktonic bacteria

• Wydawca: -
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2006
• Tom: 54
• Numer: 1
• Opis fizyczny: p.3-14,fig.,ref.

Twórcy

autor

Mudryk Z J

• Pomeranian Pedagogical University, Arciszewskiego 22 B, 76-200 Slupsk, Poland

autor

Skorczewski P.

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