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Fungal decomposition of Abies needle and Betula leaf litter

机译：冷杉针和桦叶凋落物的真菌分解

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The effect of litter type and incubation temperature on the ability of fungi to decompose leaf litter of subalpine trees was examined by a pure-culture test. Mass loss of Abies needle and Betula leaf litter and utilization patterns of lignin and carbohydrates were investigated under two temperature conditions (20 C and 10 C) and compared for 29 species in basidiomycetes, ascomycetes and zygomycetes. The decomposing ability was generally higher in basidiomycetes than in ascomycetes and zygomycetes. Mass loss (% original mass) of litter was higher in Betula than in Abies and higher at 20 C than at 10 C. The 29 fungi were divided into lignocellulose decomposers, cellulose decomposers and sugar fungi based on their substrate utilization in Abies and Betula litter. Mass loss of lignin and carbohydrates by lignocellulose and cellulose decomposers was higher in Betula than in Abies. Mass loss of carbohydrates was higher at 20 C than at 10 C, but the temperature did not influence mass loss of lignin, indicating lignin decomposition by fungi was less sensitive to temperature than carbohydrate decomposition. Lignin/carbohydrate loss ratio (L/C) of Collybia spp. that caused selective delignification was lower at 20 C than at 10 C. These results indicate that the decomposability of litter, lignin and carbohydrate was different between Abies and Betula and that temperature affected not only the rate at which fungi decompose litter but also the ability of fungi to use lignin and carbohydrates.
机译：通过纯培养试验研究了凋落物类型和孵化温度对真菌分解亚高山树叶子凋落物能力的影响。在两个温度条件下（20℃和10℃）研究了冷杉针叶和桦树叶凋落物的质量损失以及木质素和碳水化合物的利用模式，并比较了担子菌，子囊菌和合子菌中的29种物种。担子菌的分解能力通常高于子囊菌和合子菌。桦木的凋落物质量损失（原始质量百分比）高于冷杉，而20 C则高于10C。根据真菌在冷杉和桦木垫料中的利用情况，将这29种真菌分为木质纤维素分解剂，纤维素分解剂和糖真菌。 。木质纤维素和纤维素分解剂造成的木质素和碳水化合物的质量损失在桦木中高于在冷杉中。 20℃时碳水化合物的质量损失高于10℃时的质量损失，但是温度不影响木质素的质量损失，表明真菌分解的木质素对温度的敏感性不如碳水化合物分解。秋水仙属的木质素/碳水化合物损失率（L / C）。导致选择性脱木质素的温度在20°C时低于10°C。这些结果表明，冷杉和桦木的凋落物，木质素和碳水化合物的分解能力不同，温度不仅影响真菌分解凋落物的速率，还影响真菌的分解能力。真菌要使用木质素和碳水化合物。

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