Comparison of Enzyme Activity and Nutrients of Ganoderma lucidum Cultivated on Bagasse and Cottonseed Hull Substrates
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Abstract:
In this study, Ganoderma lucidum was cultured using bagasse and cottonseed hull as substrates, and the growth characteristics, enzyme activity, and nutrients in the fruiting body were compared. The results showed that G. lucidum cultivated on bagasse exhibited faster mycelium growth (1.82 ± 0.54 cm/d), higher biological efficiency (23.71 ± 1.49%), and a shorter growth cycle (less by a day) than G. lucidum cultivated on cottonseed hull. During cultivation on either substrate, the trend of changes in the enzyme activity of carboxymethyl cellulase (CMCase), xylanase, and laccase in two culture media were consistent. A single peak value for each of the three enzyme activities was obtained for G. lucidum cultivated on the two substrates in the mycelium and fruiting body stages. G. lucidum cultivated on bagasse showed higher CMCase and xylanase activities, but lower laccase activity when than G. lucidum cultivated on cottonseed hull. Compared with the fruiting body of G. lucidum cultivated on cottonseed hull, the fruiting body of G. lucidum cultivated on bagasse substrate showed higher content of crude protein (22.04 ± 0.07%), crude fat (2.73 ± 0.03%), polysaccharide (4.15 ± 0.03%), crude fiber (34.19 ± 3.15%), lower content of amino acids (10.40%), essential amino acids (4.25%), ash (3.94 ± 1.08%), and a lower ratio of essential amino acid to total amino acid (40.88%).
