Influence of Temperature and pH on the Growth of the Thermophilic Cyanobacterium Mastigocladus laminosus in Continuous Culture

Abstract
The thermophilic cyanobacterium Mastigocladus laminosus was grown in a steady state continuous culture. Regulation and data sampling of the turbidostat was done with a microcomputer. Growth performance was measured as a function of temperature and pH from 30 to 62°C and between pH 4 and 10. The temperature optimum was between 45 and 55°C. Under optimal conditions the filaments contained predominantly 8 cells with a high phycocyanin content but at the temperature extremes and at high pH, 2- and 4-cell filaments containing little phycocyanin were more abundant.