Total counts of marine bacteria include a large fraction of non-nucleoid-containing bacteria (ghosts).
Appl Environ Microbiol
; 61(6): 2180-5, 1995 Jun.
Article
em En
| MEDLINE
| ID: mdl-16535043
ABSTRACT
Counts of heterotrophic bacteria in marine waters are usually in the order of 5 x 10(sup5) to 3 x 10(sup6) bacteria ml(sup-1). These numbers are derived from unspecific fluorescent staining techniques (J. E. Hobbie, R. J. Daley, and S. Jasper, Appl. Environ. Microbiol. 331225-1228, 1977; K. G. Porter and Y. S. Feig, Limnol. Oceanogr. 25943-948, 1980) and are subsequently defined as total counts of bacteria. In samples from the Baltic Sea, the North Sea (Skagerrak), and the northeastern Mediterranean Sea, we found that only a minor fraction (2 to 32%) of total counts can be scored as bacteria with nucleoids. Lack of DNA no doubt means inactive cells; therefore, a much lower number of bacteria that grow at rates higher than those previously estimated must be responsible for the measured bacterial production in these seas. The remaining bacterium-sized and/or -shaped particles included in total counts may be cell residues of virus-lysed bacteria (ghosts) or remains of protozoan grazing.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Appl Environ Microbiol
Ano de publicação:
1995
Tipo de documento:
Article
País de publicação:
EEUU
/
ESTADOS UNIDOS
/
ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
/
UNITED STATES OF AMERICA
/
US
/
USA