Data/hora: 01/06/2024 08:36:21

Provedor de dados: | 5
País: | France
Título: | Adaptive features of a bacteriolytic enzyme from the style of the mussel Choromytilus meridionalis in response to environmental fluctuations.
Autores: | Seiderer, L; Robb, F.
Data: | 1984-10
Ano: | 1984
Palavras-chave: | Choromytilus meridionalis; Bivalvia; Digestive system; Bacteria; Upwelling; Environmental effects; Adaptations; Bacteriocides; Marine molluscs; Enzymatic activity.
Resumo: | The extracellular digestive apparatus of bivalve molluscs consists of a crystalline style containing diverse degradative enzymes which are released during rotation and dissolution of the style. This paper reviews the occurrence of a temperature-regulated bacteriolytic enzyme in the black mussel Choromytilus meridionalis , which is an inhabitant of coastal reefs on the south and south west coast of South Africa. This agent is unable to lyse Micrococcus luteus or Escherichia coli , both of which are susceptible to lysis by a true lysozyme. It appears to have a restricted spectrum of activity which includes both free-living and kelp-associated gram-negative bacteria. In addition, the level of activity varies dramatically according to the environmental water temperature. When upwelling occurs, the water in cold (9 degree C) and is poor in phytoplankton and macrophyte debris. Under these conditions bacteriolytic activity is at its maximum and bacteria predominate as a nitrogen-rich exploitable food resource with a C:N ratio of approximately 3.5:1. These phases of upwelling are interspersed with an opposite flow of phytoplankton-rich warm surface water. Under these conditions bacteriolytic activity of the style is at a minimum.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/1984/acte-991.pdf
Editor: | Actes de colloques. Ifremer Brest [ACTES COLLOQ. IFREMER.]. 1986
Relação: | http://archimer.ifremer.fr/doc/00000/991/
Formato: | application/pdf