Introduction
The ability of white rot fungi to degrade all principal components of wood is important for carbon flux in ecosytems [1]. The ligninolytic system enables white rot fungi to catalyze the oxidation of phenolic compounds by molecular oxygen. They are capable to delignify wood pulp, decolorize and detoxify effluents generated by the pulp and paper industry and degrade toxic environmental pollutants and synthetic dyes, which are carcinogenic and hazardous to environment [2] and [3]. More recent approaches have focused on utilizing agro-wastes as a raw material for the production of microbial metabolites for food processing industries. This has gained increasing ground because agro-based raw materials such as coffee pulp and husk, sugar beet pulp, sugarcane bagasse and bran of pulses have the advantage of being used as a sole source of energy and C-pool and are environment friendly [4]. This has particular relevance for agriculture-based countries like India wherein plenty of agro-waste is available as raw material. The component analysis of groundnut shell (GNS) reveals that it contains (wt% dry biomass) about 35.7% cellulose, 18.7% hemicellulose and 30.2% lignin [5], thus groundnut shell was choice substrate to study the ligninolytic enzyme activities in dependence with nitrogen source in submerged fermentation by white rot fungi.