Article

Ocean Science Journal

, Volume 45, Issue 1, pp 1-5

First online:

The effect of decrease in salinity on the dynamics of abundance and the cell size of Corethron Hystrix (Bacillariophyta) in laboratory culture

  • Nina A. AizdaicherAffiliated withA.V. Zhirmunsky Institute of Marine Biology, Far Eastern Branch, Russian Academy of Sciences
  • , Zhanna V. MarkinaAffiliated withA.V. Zhirmunsky Institute of Marine Biology, Far Eastern Branch, Russian Academy of Sciences Email author 

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Abstract

Effect of salinity on abundance dynamics and cell size of microalga Corethron hystrix Hensen (Bacillariophyta) were studied. C. hystrix can normally grow within a rather narrow salinity range between 32 and 28‰. The viable cells of this microalga change their morphological characters at a salinity of 24‰. This salinity level probably marks the beginning of cell division restriction, because the general number of cells by the end of the experiment was lower than in the control. The decrease of salinity to 16‰ caused pronounced irreversible morphological changes: cell height increased, chloroplasts compressed, protoplasm became granular, cytoplasm retracted, and spines shortened.

Key words

Corethron hystrix diatoms salinity growth cell size