کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4412602 1307645 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microbial community structure and function during abnormal curve development of substrate-induced respiration measurements
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Microbial community structure and function during abnormal curve development of substrate-induced respiration measurements
چکیده انگلیسی

Soil respiration measurements are an established method to test the abundance, activity and vitality of the soil microorganisms. However, abnormal progressions of soil respiration curves impede a clear interpretation of the data. The aim of this study was to investigate the changes in the microbial structure during the formation of phenomena like double peaks and terraces by analysis of the PLFA composition (phospholipid fatty acid composition). Moreover, 13C labeled glucose was used as substrate; therefore it was possible to measure δ13C values both within the PLFA fraction as well as within the carbon dioxide evolved during respiration. As contaminants trinitrotoluene, cycloheximide, and hexadecane were used. The results showed that the appearance of double peaks was mainly related to the growth of fungi with the marker 18:2δ9,12 due to a toxic effect of trinitrotoluene and cycloheximide. In contrast, the phenomenon of terrace formation was related to the utilization of hexadecane as a carbon source mainly by bacteria.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 77, Issue 11, December 2009, Pages 1488–1494
نویسندگان
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