Abstract

CHELATING IMPACT OF TWO AUTOTROPHS ON HEAVY METAL INDUCED ENZYME VARIATIONS IN VARIOUS BRAIN REGIONS OF THREE FRESH WATER TELEOSTS

Rana Suhail*, Pradeep Shrivastava and S. A. Shaffi

Abstract

The detoxifying impact of the autotrophs (chlorella vulgaris and spirulina platensis) were investigated on sub lethal mercury and lead induced enzyme variations (phosphoglucomutase and hexokinase) on differential distribution in cerebrum, diencephalon, cerebellum and medulla oblongata in three inland teleosts i.e. Labeo rohita (ham) Clarias batrachus (linn) and Channa punctatus (bloch) on a comparative approach from a tropical environment under chronic studies (15, 30, 45 & 60 days exposure). A marked elevation in phosphoglucomutase and hexokinase followed by cerebrum, medulla oblongata and cerebellum when exposed to sub lethal mercury and lead concentrations in the above said fish species in presence of two autotrophs i.e. chlorella vulgaris and spirulina platensis was recorded. Between the autotrophs it was chlorella vulgaris enhanced the enzyme level than spirulina platensis. Between the heavy metals mercury was more toxic than lead. Among the fish species L. rohita registered the maximum fall (when exposed directly to sub lethal metal concentrations) and rise (when metal exposed with autotrophs) in L. rohita in comparison to C. batrachus and C. punctatus and the recorded variations were discussed in detail.

Keywords: Chronic studies, mercury, lead, Labeo rohita, Clarias batrachus, Channa punctatus, Chlorella vulgaris, Spirulina platensis, phosphoglucomutase, hexokinase.