GROWTH OF CHLORELLA SOROKINIANA AT HYPERBARIC OXYGEN PRESSURES
Rept. for Jun 1967-Jan 1968
SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
Pagination or Media Count:
The growth rate of the oxygen tolerant strain OTS of Chlorella sorokiniana decreases in a linear fashion as the partial pressure of oxygen is increased from 711 to 1478 mm Hg. Under two atmospheres of oxygen pressure growth ceases after 10 to 12 hours. This cessation of growth is not due to any permanent injury, as growth is resumed when oxygen partial pressure is reduced to ambient levels. The inhibition occurs under both autotrophic and heterotrophic growth conditions and is not accompanied by an increase in cell size. The results indicate that the tolerance of OTS cells to elevated oxygen pressures is not an absolute immunity, and that inhibition of growth at very high oxygen pressures cannot be accounted for by an inhibition of photosynthesis alone.