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首页> 外文期刊>World Journal of Microbiology & Biotechnology >Lignocellulose-degrading enzyme production by white-rot Basidiomycetes isolated from the forests of Georgia
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Lignocellulose-degrading enzyme production by white-rot Basidiomycetes isolated from the forests of Georgia

机译：从乔治亚州森林中分离出的白色腐烂担子菌产生木质纤维素降解酶

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摘要

The production of lignocellulolytic enzymes by eleven basidiomycetes species isolated from two ecosystems of Georgia was investigated for the first time under submerged (SF) and solid-state fermentation (SSF) of lignocellulosic by-products. Notable intergeneric and intrageneric differences were revealed with regard to the extent of hydrolase and oxidase activity. Several fungi produced laccase along with hydrolases in parallel with growth during the trophophase, showing that the synthesis of this enzyme is not connected with secondary metabolism. The lignocellulosic substrate type had the greatest impact on enzyme secretion. Some of the substrates significantly stimulated lignocellulolytic enzyme synthesis without supplementation of the culture medium with specific inducers. Exceptionally high carboxymethyl cellulase (CMCase, 122 U mlp#) and xylanase (195 U mlp#) activities were revealed in SF of mandarin peelings by Pseudotremella gibbosa IBB 22 and of residue after ethanol production (REP) by Fomes fomentarius IBB 38, respectively. The SSF of REP by T. pubescens IBB 11 ensured the highest level of laccase activity (24,690 U lp#), whereas the SSF of wheat bran and SF of mandarin peels provided the highest manganese peroxidase activity (570-620 U lp#) of Trichaptum biforme IBB 117. Moreover, the variation of lignocellulosic growth substrate provides an opportunity to obtain enzyme preparations containing different ratios of individual enzymes.
机译：首次研究了从佐治亚州两个生态系统中分离的11种担子菌属物种产生的木质纤维素分解酶，它们是在木质纤维素副产物的淹没（SF）和固态发酵（SSF）下进行的。关于水解酶和氧化酶活性的程度，显着的属间和属内差异被揭示。在滋养期，几种真菌产生的漆酶与水解酶同时生长，表明该酶的合成与次级代谢无关。木质纤维素底物类型对酶的分泌影响最大。某些底物可显着刺激木质纤维素分解酶的合成，而无需向培养基中添加特定的诱导剂。巨大的羧甲基纤维素酶（CMCase，122 U mlp＃）和木聚糖酶（195 U mlp＃）的活性分别由gibbosa gibbosa IBB 22的普通话去皮和由Fomes fomentarius IBB 38产生的乙醇中的残留物（REP）揭示。 T. pubescens IBB 11的REP的SSF确保了最高水平的漆酶活性（24,690 U lp＃），而麦麸的SSF和普通话皮的SF提供了最高的锰过氧化物酶活性（570-620 U lp＃）。 Trichaptum biforme IBB 117.此外，木质纤维素生长底物的变化为获得包含不同比例的单个酶的酶制剂提供了机会。

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