Pk. Mohapatra et al., EFFECTS OF NUTRIENTS AT DIFFERENT SALINITIES ON GROWTH OF THE FRESH-WATER GREEN-ALGA SCENEDESMUS-BIJUGATUS IN WATER OF NARENDRA POND, PURI,ORISSA, INTERNATIONAL REVIEW OF HYDROBIOLOGY, 83(4), 1998, pp. 297-304
The growth and biochemical composition of Scenedesmus bijugatus grown
in normal and nutrient enriched Narendra Pond water was evaluated at d
ifferent levels of salinity. In normal pond water (NPW) the growth was
enhanced when the initial salinity of the water was doubled (to 7.2 m
mol/l) but further salinity increase caused growth retardation. In nut
rient enriched pond water (NEW), however, the maximum growth occurred
in the culture containing 29 mmol/l of NaCl. At growth retarding salt
concentrations the chlorophyll, carbohydrate, protein and lipid conten
ts per cell decreased in both NPW and NEW while the proline content fi
rst increased and was then reduced. All nutrients, taken separately or
in combination, caused growth enhancement of the alga ar the three se
lected salinity levels. The alga showed a better halotolerance when en
riched with nitrogen or phosphorus.