Untersuchungen �ber die Wirkung des hydrostatischen Druckes auf das Wachstum von Delesseria sanguinea (L.) Lamour. aus der westlichen Ostsee

Abstract

Observations on the effect of hydrostatic pressure on the growth of Delesseria sanguinea (L .) LAMOUR . from the western Baltic Sea .The post-treatment effects of hydrostatic pressures (100-500 atm) on the growth in length and breadth of young prolifications of D . sanguinea were studied at 15°C . Growth activity was compared amongst the prolifications separated from the midrib and not separated ones, and cell-viability as influenced by high pressures was also observed under the microscope . Pressure-temperature relationship was investigated, in which the pressure effects on growth were studied at different temperatures (5°-22°C), using prolifications which were previously adapted to corresponding temperatures . Long-termed experiments were also set up to study the capability of pressure adaptation in young leaflets . In this regard the growth activity was measured after long-termed exposure to relatively smaller pressures (20-60 atm) . EINLEITUNG