Menu

Javascript is not activated in your browser. This website needs javascript activated to work properly.
You are here

Physiological and morphological changes during short term starvation of marine bacterial islates

Author:
  • Per Mårdén
  • Anders Tunlid
  • Karin Malmcrona-Friberg
  • Göran Odham
  • Staffan Kjelleberg
Publishing year: 1985-09-01
Language: English
Pages: 326-332
Publication/Series: Archives of Microbiology
Volume: 142
Issue: 4
Document type: Journal article
Publisher: Springer

Abstract english

Three marine bacteria were examined for physiological and morphological changes in the initial phase of starvation. It was found that the starvation process was induced in a similar way irrespective of whether the cells were suspended in nutrient and energy free artificial seawater (NSS) or NSS supplemented with nitrogen and phosphorus. An initial phase of increased activity was consistent with a decreased response to added nutrients. Recovery from starvation exhibited the same response in both these starvation regimes, measured throughout the starvation period. Cells in nitrogen or phosphorus deprived starvation regimes, showed a high and rapid increased activity, followed by a delayed and more pronounced decline in respiratory activity. The initial phase of starvation also included a loss of poly-β-hydroybutyrate as observed by transmission electron microscopy (TEM). Two bacterial strains showed formation of small vesicles on the outer cell layer when examined by TEM. This formation and release of vesicles was related to the continuous size reduction during starvation survival. The results are discussed in terms of defining the mechanisms of initial cellular responses to nutrient deprivation.

Keywords

  • Microbiology
  • Energy and nutrient requirement
  • Marine bacteria
  • Oxygen uptake
  • Poly-β-hydroxybutyrate
  • Recovery from starvation
  • Starvation-survival
  • Vesicle formation

Other

Published
  • ISSN: 0302-8933
Anders Tunlid
E-mail: anders [dot] tunlid [at] biol [dot] lu [dot] se

Pro dean

Faculty of Science

+46 70 314 00 67

B110

Sölvegatan 27, Lund

39

Professor

MEMEG

+46 46 222 37 57

E-F220

Sölvegatan 37, Lund

50