Pleurotus eryngii Suşlarının Lignoselülozik Soya Saplarını Biyodönüştürme Etkinlikleri

Abstract

The bioconversion o f soy stalk (SS) lignocellulose by three different starins o f Pleurotus eryngii from various origins by solid state fermentation was studied during 40 days. The effect o f rice bran ratio, 5% or 10% (w/w), on lignin degradation and laccase activity were measured througout the fermentations while, total crude protein and C /N ratio o f the remaining substrate were determined at the end o f the fermentations. The degradation o f lignocellulose was found by the determination o f acid soluble lignin (Klason lignin) content. All the strains degraded lignin with different extents. The amount o f lignin degradation was decreased by the addition o f the higher quantities o f rice bran (SS + 10% RB). The highest lignin degradation was obtained as 24.43% by P eryngii var. ferulae (E) and the highest protein level was found to be %13.32 by P eryngii (H). We determined that the laccase activity was generally decreased by the addition o f the higher quantities o f rice bran (10%). Maximum laccase activity (204.39 U/L) was obtained by P eryngii (E) on SS + 5% RB at the end o f the fermentation. This study showed that, after fungal treatment soy stalk can be used as a feed for ruminants with its higher feeding value.