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EFFECT OF CELLULOLYTIC FUNGI ON THE DEGRADATION OF CELLULOSIC AGRICULTURAL WASTES. M Kadarmoidheen, P Saranraj, D Stella

EFFECT OF CELLULOLYTIC FUNGI ON THE DEGRADATION OF CELLULOSIC AGRICULTURAL WASTES.

M Kadarmoidheen, P Saranraj, D Stella

International Journal of Applied Microbiology Science 2012;1(2); 13-23.

Abstract
The fungal isolates bring about most of the cellulose degradation occurring in various environments. The present study was conducted to study the biodegradation of cellulosic waste materials viz., paddy straw, sugarcane bagasse and banana stalks using the cellulolytic fungi isolates, Trichoderma viride, Aspergillus niger and Fusarium oxysporum. The cellulosic wastes were subjected to various physical and chemical pretreatments for better susceptibility of cellulosic wastes to fungal enzymes. Among the three fungal isolates examined for their relative capacity to produce cellulase, Trichoderma viride showed the maximum C1 activity of 9.4 units per 50 ml broth. Fusarium oxysporum showed the maximum Cx of 62.4 per cent loss in viscosity. The cellulosic wastes were analyzed for the various biochemical constituents like hemicelluloses and cellulose. The highest cellulose content of 36.23 per cent was observed in banana stalks. The highest hemicellulose content of 24.82 per cent was recorded in sugarcane bagasse. The effects of cellulolytic fungi on the biodegradation of cellulosic wastes were studied at the periodical interval of 15, 30 and 45 days. Among the three fungal isolates studied Trichoderma viride was found to be the most efficient in degrading the cellulosic wastes viz., paddy straw, sugarcane bagasse and banana stalks decreasing the cellulose content by 53.70, 51.59 and 55.28 per cent respectively. This was followed by Aspergillus niger and Fusarium oxysporum in their efficiency to degrade the different cellulosic wastes.

Keywords: Cellulose, Cellulolytic fungi, Cellulosic waste and Hemicelluloses.
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