| SYSNO ASEP | 0104268
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| Druh ASEP | J - Článek v odborném periodiku
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| Zařazení RIV | J - Článek v odborném periodiku
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| Poddruh J | Ostatní články
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| Název | Are bacteria the major producers of extracellular glycolytic enzymes in aquatic environments?
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| Překlad názvu | Jsou bakterie hlavními producenty extracelulárních glykolytických enzymů ve vodním prostředí?
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| Tvůrce(i) | Vrba, Jaroslav (HBU-Z)
Callieri, C. (IT)
Bittl, T. (DE)
Šimek, Karel (HBU-Z)
Bertoni, R. (IT)
Filandr, P. (CZ)
Hartman, Petr (HBU-Z)
Hejzlar, Josef (HBU-Z)
Macek, Miroslav (HBU-Z)
Nedoma, Jiří (HBU-Z)
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| Zdroj.dok. | International Review of Hydrobiology. - : Wiley
- ISSN 1434-2944
Roč. 89, č. 1 (2004), s. 102-117
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| Poč.str. | 16 s.
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| Jazyk dok. | eng - angličtina
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| Země vyd. | DE - Německo
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| Klíč. slova | ectoenzyme activity ; diatoms ; Daphnia longispina
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| Vědní obor RIV | DA - Hydrologie a limnologie
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| CEP | IBS6017004 GA AV ČR - Akademie věd
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| GA206/99/0028 GA ČR - Grantová agentura ČR
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| GA206/00/0063 GA ČR - Grantová agentura ČR
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| CEZ | AV0Z6017912 - HBU-Z, BC-A
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| Anotace | It has been considered that most extracellular enzymes are of bacterial origin. We tested this paradigm by evaluating the relationship between bacterial number and the activity of three glycolytic enzymes from 17 fresh waters. Our large sets of pooled data do not seem to support such a simple explanation, because we found only a weak correlation of bacterial number with activity of alpha- and beta-glucosidases, and beta-N-acetylhexosaminidase. During diatom blooms, their biomass tightly correlated with hexosaminidase activity. We also documented very tight relationships between activity of both glucosidases and dry weight of Daphnia longispina in an alpine clear-water lake. Our data and evidence from other studies indicate that extracellular glycosidic activities in aquatic ecosystems cannot generally be assigned only to bacteria. Also invertebrate animals and other eukaryotes (fungi, diatoms, protozoa etc.) should be considered as potentially very important enzyme producers.
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| Pracoviště | Hydrobiologický ústav (do r. 2005)
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| Kontakt | Václava Lavičková, lavickova@hbu.cas.cz, Tel.: 387 775 889
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| Rok sběru | 2005
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