Bioconversion of organosoluble lignins by different types of fungi

A. Haars, D. Tautz, A. Hüttermann
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引用次数: 7

Abstract

Technical organosoluble lignins could serve as growth substrate for several fungi of different ecotypes. Certain species of fungi increased the water solubility of the lignin, depending on the glucose concentration in the medium. The solubilization rate was increased also by successive growth of fungi on the lignin. All types of organosoluble lignin induced high activities of extracellular phenoloxidase (E.C.1.14.18.1) in cultures of white-rot fungi. The enzyme activities obtained on organosoluble lignins were higher than on lignosulfonates. Due to the action of phenoloxidases two water-soluble, acid-precipitable lignin polymerizates with different physical properties were formed. The nitrogen and glucose content in the medium plays an important role in the polymerization.

不同类型真菌对有机可溶性木质素的生物转化
技术有机可溶性木质素可以作为几种不同生态型真菌的生长基质。真菌的某些种类增加了木质素的水溶性,这取决于培养基中的葡萄糖浓度。真菌在木质素上的连续生长也增加了木质素的溶解速率。所有类型的有机可溶性木质素均能诱导白腐菌胞外酚氧化酶(E.C.1.14.18.1)的高活性。有机可溶性木质素的酶活性高于木质素磺酸盐。由于酚氧化酶的作用,形成了两种具有不同物理性质的水溶性、酸沉淀木质素聚合物。培养基中氮和葡萄糖的含量对聚合反应起着重要的作用。
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