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The effect of oxygen on fatty acid composition of soil micromycetes

机译:氧对土壤微生物的脂肪酸组成的影响

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The aim of this work was to describe changes in fatty acid profiles of fungi growing under artificial conditions of oxygen depletion. In total, 133 fungal strains belonging to eight orders were isolated from cattle impacted soils and tested. The analysis of the ten most frequent fatty acids revealed significant shift in fatty acids composition as a result of decreasing oxygen level. Taxonomic- as well as aeration-dependent changes in the amounts of fungal biomarker fatty acids (18:1 omega 9 and 18:2 omega 6,9) were found. Therefore, the ratio of these two fatty acids could be considered as an indicator of anaerobic, microaerobic or aerobic conditions in soil. Moreover, fatty acid-based estimation of fungal biomass in soils should be performed as a sum of both biomarker fatty acids and with respect to the soil characteristics as well as to the composition of fungal community. (C) 2015 Elsevier Ltd. All rights reserved.
机译:这项工作的目的是描述在人工耗氧条件下生长的真菌的脂肪酸谱变化。总共,从受牛影响的土壤中分离了8个等级的133个真菌菌株并进行了测试。对十种最常见脂肪酸的分析显示,由于氧气含量降低,脂肪酸组成发生了明显变化。发现真菌生物标记脂肪酸的量(18:1欧米茄9和18:2欧米茄6,9)的分类和通气依赖性变化。因此,这两种脂肪酸的比例可被视为土壤中厌氧,微需氧或需氧条件的指标。此外,应根据土壤中真菌的生物标志物脂肪酸和土壤特性以及真菌群落组成的总和来进行基于脂肪酸的土壤生物量估算。 (C)2015 Elsevier Ltd.保留所有权利。

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