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首页> 外文期刊>Mycologia >Wood decomposing abilities of diverse lignicolous fungi on nondecayed and decayed beech wood
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Wood decomposing abilities of diverse lignicolous fungi on nondecayed and decayed beech wood

机译：各种木质真菌对未腐烂和腐烂的山毛榉木的木材分解能力

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摘要

We tested the decay abilities of 28 isolates from 28 lignicolous fungal species (Basidiomycota, Ascomycota and Zygomycota) with the pure culture test. We used beech wood powder in varying moisture conditions and decay stages (nondecayed, intermediately decayed and well decayed) as substrates. The weight loss in wood powder was -0.2-17.8%. Five isolates of Basidiomycota (Bjerkandera adusta, Mycena haematopus, Omphalotus guepiniformis, Trametes hirsuta, Trametes versicolor) caused high weight losses in nondecayed wood. We detected significant effects of decay stage on weight loss in wood in most isolates tested, whereas moisture content rarely had an effect on weight loss. Among Basidiomycota and Xylariaceae in Ascomycota weight loss was greater for nondecayed wood than for intermediately and well decayed wood. In contrast four isolates in Ascomycota (Scytalidium lignicola, Trichoderma hamatum, 71 harzianum, T. koningii) caused substantial weight loss in intermediately and well decayed wood, although they rarely caused weight loss in nondecayed wood. Zygomycota caused low weight loss in wood. Wood decay stages also affected decomposition of wood chemical components. Acid-unhydrolyzable residue (AUR) decomposition was reduced, whereas holocellulose decomposition was stimulated by some strains of Basidiomycota and Ascomycota in well decayed wood. T. harzianum in particular caused significant weight loss of holocellulose in well decayed wood, although this fungus caused negligible weight loss of both AUR and holocellulose in nondecayed wood. We discuss these changes in the decay patterns of AUR and holocellulose with varying wood decay stages in relation to the role of fungal decomposition of woody debris in forests.
机译：我们用纯培养试验测试了来自28种木霉菌种（担子菌，子囊菌和合子菌）的28种分离物的腐烂能力。我们使用了处于不同湿度条件和腐烂阶段（未腐烂，中等腐烂和腐烂良好）的山毛榉木粉作为基质。木粉的重量损失为-0.2-17.8％。五种担子菌分离株（Bjerkandera adusta，Mycena haematopus，Omphalotus guepiniformis，Trametes hirsuta，Trametes versicolor）在未腐烂的木材中造成了很大的重量损失。在大多数测试菌株中，我们检测到腐烂期对木材失重有重大影响，而水分含量对失重几乎没有影响。在子囊菌中的担子菌科和木糖科中，未腐烂的木材的重量损失比中间腐烂的和严重腐烂的木材更大。相比之下，子囊菌中的四个分离株（Scytalidium lignicola，Trichoderma hamatum，71 harzianum，T。koningii）在中度和腐烂度很高的木材中引起大量的体重减轻，尽管它们很少引起未腐烂的木材中体重的减轻。 Zygomycota引起木材的低重量损失。木材腐烂阶段也影响了木材化学成分的分解。减少了酸不可水解残留物（AUR）的分解，而腐烂木材中的某些担子菌和子囊菌菌株刺激了全纤维素分解。哈茨木霉特别引起腐烂的木材中全纤维素的显着重量损失，尽管这种真菌使未腐烂的木材中的AUR和全纤维素的重量损失可忽略不计。我们讨论了随着木材腐烂阶段的变化，AUR和全纤维素腐烂模式的这些变化与森林中木屑碎片的真菌分解作用有关。

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