Data/hora: 09/06/2024 07:24:59

Provedor de dados: | 5
País: | France
Título: | Actinomycetes of the bottom sediments of various seas.
Autores: | Weyland, H.
Data: | 1984-10
Ano: | 1984
Palavras-chave: | A; Atlantic Actinomycetes Organism morphology Taxonomy Species diversity Geographical distribution Bacteria New species Pelagic sediments Abyssal zone Growth Population dynamics.
Resumo: | Occurrence, distribution and physiological characteristics of actinomycetes in the top of the sediments of various seas were studied. Viable counts were very low in open sea sites. The majority of the isolates could be grouped to streptomycetes, Micromonosporae and nocardioforms. Streptomycetes are preponderantly distributed in coastal and shelf regions. They exhibit relatively broad temp. and salinity spectra and allow baroresistance. Micromonosporae are found in relation to the other taxa more frequently in deep sea sediments. They grow better in media with low salt concentration and have a temp. optimum around 30 degree C. On the other hand they are very baroresistant allowing these organisms to survive in the deep sea for long periods. Nocardioforms form the major part of sediment actinomycetes in open sea areas. Salt and monovalent cation dependence as well as a lower temp. optimum mark these organisms as indigenous bacteria. Since their maximal growth pressure is relatively low their distribution is limited up to about 2000 m. By numerical phenetic assay they could be distinguished from known nocardioforms and could be assigned to a new species Rhodococcus marinonascens .
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/1984/acte-946.pdf
Editor: | Actes de colloques. Ifremer Brest [ACTES COLLOQ. IFREMER.]. 1986
Relação: | http://archimer.ifremer.fr/doc/00000/946/
Formato: | application/pdf