Research Article Differential Response of Oyster Shell Powder on Enzyme Profile and Nutritional Value of Oyster Mushroom

Copyright © 2014 Ram Naraian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Oyster mushroom Pleurotus floridawas cultivated on different combinations of wheat straw (WS) as basal substrate and oyster shell powder (OSP) supplement. The OSP supplementation considerably responded to different cultivation phases. The mycelium grew fast and showed rapid growth rate (8.91mmd−1) in WS + OSP (97 + 3) combination while WS + OSP (92 + 8) showed maximum laccase (3.133U/g) andMnperoxidase (MnP) activities (0.091U/g).The climax level of laccase (5.433U/g) andMnP (0.097U/g) was recorded during fruit body initiation inWS +OSP (97 + 3) andWS +OSP (98 + 2) combinations, respectively.TheWS +OSP (97 + 3) combination represented the best condition for mushroom cultivation and produced the highest biological efficiency (147%). In addition, protein and lipid contents in fruit bodies were slightly improved in response to OSP. The carbohydrate was significantly increased by raising concentration of OSP.The highest values of protein, carbohydrate, and lipid noted were 31.