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Marine Biology

, Volume 127, Issue 3, pp 515–520 | Cite as

Resting spore formation of the marine planktonic diatom Chaetoceros anastomosans induced by high salinity and nitrogen depletion

  • O. Oku
  • A. Kamatani

Abstract

The marine planktonic diatom Chaetoceros anastomosans, which was isolated from Sagami Bay, was used for a study of resting spore formation mechanisms in batch culture experiments. Vegetative cells could grow at salinities ranging from 20.7 to 45.5‰, and resting spore formation was enhanced significantly in nitrate-depleted, high salinity media (40.0 to 45.5‰). The rate of resting spore formation (1.9 d−1) was comparable to the specific growth rate (1.8 d−1) of vegetative cells in the exponential growth phase in normal salinity medium. The size of resting spores formed under high salinity conditions was smaller than that of spores formed in normal salinity media. Unlike vegetative cells, resting spores seemed to possess some mechanisms to survive over a wider range of salinities by resisting bacterial attacks on their cell walls.

Keywords

Nitrogen Growth Rate Cell Wall Vegetative Cell Growth Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • O. Oku
    • 1
  • A. Kamatani
    • 1
  1. 1.Laboratory of Marine Chemistry, Tokyo University of Fisheries, Konan, Minatoku, Tokyo, JapanJP

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