Počet záznamů: 1

Differentiation between activity of digestive enzymes of .i.Brachionus calyciflorus./i. and extracellular enzymes of its epizooic bacteria

  1. 1.
    0338890 - BC-A 2010 RIV IT eng J - Článek v odborném periodiku
    Štrojsová, Martina - Ahlrichs, W.H.
    Differentiation between activity of digestive enzymes of Brachionus calyciflorus and extracellular enzymes of its epizooic bacteria.
    Journal of Limnology. Roč. 68, č. 2 (2009), s. 409-412 ISSN 1129-5767
    Výzkumný záměr: CEZ:AV0Z60170517
    Klíčová slova: rotifers * phosphatase * beta-N-acetylhexosaminidase * enzyme localization
    Kód oboru RIV: EG - Zoologie
    Impakt faktor: 0.932, rok: 2009

    The rotifer Brachionus calyciflorus was examined by scanning electron microscopy (SEM) for surface-attached, i.e. epizootic, bacteria to ascertain their specific localization and thus find out if we could discern between rotifer and bacterial enzyme activity. The lorica of B. calyciflorus was colonized by one distinct type of bacteria, which originated from the algal culture used for rotifer feeding. The corona, posterior epidermis and foot of all inspected individuals were always without attached bacteria. The density of the attached bacteria was higher with the increasing age of B. calyciflorus. We hypothesize that epizooic bacteria may produce the ectoenzymes phosphatases and beta-N-acetylhexosaminidases on the lorica, but not on the corona of B. calyciflorus. Since enzyme activities of epizooic bacteria may influence the values and interpretation of bulk rotifer enzyme activities, we should take the bacterial contribution into account.
    Trvalý link: http://hdl.handle.net/11104/0182547