Journal of the Marine Biological Association of India

Volume 17 Issue 1

Production of Dissolved Carbohydrate (DCHO) in three unialgal cultures.

Sumithra Vijayaraghavan, K. J. Joseph, V. K. Balachandran and V. Chandrika

Production of dissolved carbohydrate (DCHO) in the unialgal cultures of Tetraselmis gracilis, Chlorella salina and Synechocystis salina was studied in the laboratory for a period of 31 days. DCHO values ranged from 0.5 to 25.0 mg/1 in T. gracilis culture, the range of variation in C. salina and S. salina was 0.5 to 8.5 mg/1. Both in T. gracilis and in S.salina cultures, the DCHO values showed an increasing trend towards the end of stationary phase, whereas in C. salina, the production of DCHO could not be attributed to any particular phase of growth of the culture. The fluctuations of DCHO values for a given number of cells showed that it is not the number but the physiological state of the organisms that influences the production of DCHO. No definite relationship or trend was evident between DCHO and the bacterial counts.

Date : 30-04-1975