An effect of osmotic pressure on the valve morphology of the diatom Skeletonema subsalsum (A.Cleve) Bethge
Paasche, E. ; Johansson, S.; Evensen, D.L. (1975). An effect of osmotic pressure on the valve morphology of the diatom Skeletonema subsalsum (A.Cleve) Bethge. Phycologia 14(4): 205-211
In: Phycologia. International Phycological Society: Odense. ISSN 0031-8884; e-ISSN 2330-2968, more
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| Keywords |
Biology > Organism morphology
Environmental effects > Pressure effects
Environmental effects > Salinity effects
Skeletonema subsalsum (Cleve-Euler) Bethge, 1928 [WoRMS]
Brackish water |
| Authors | | Top |
- Paasche, E.
- Johansson, S., more
- Evensen, D.L.
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| Abstract |
The valve morphology of the brackish-water plankton diatom S. subsalsum is dependent on salinity. In cells grown at salinities of 3 ppt or less, the valve faces were flat and the connecting processes much reduced in length. Cells grown at salinities of 5 ppt or higher had dome-shaped valves and extended connecting processes. The effect of an increase in salinity could be duplicated by the addition of sucrose to the growth medum. The growth rate nearly independent of salinity in the range of 1-10 ppt. It was concluded that the osmotic pressure of the medium exerts a direct effect on cell-wall morphogenesis in S. subsalsum. |
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