Stable carbon isotope ratios of bacterial biomarkers were determined to infer sources of organic carbon used by bacteria in the sediments of three salt marshes. Biomarkers studied were polar lipid-derived fatty acids (PLFA), mainly bacteria-specific, methyl-branched i15 : 0 and a15 : 0. Experiments showed that isotopic fractionation between substrate and biomarkers was relatively constant (24 t...

Optimal potassium (K) fertilizer application in potato cropping systems can effectively increase food production and mitigate soil microbial ecosystem stress. The dynamics sustainability of yield, the commodity rates (CRs), community structure were explored under four different K (kg ha−1 year−1): 0 (control), 75 (low K), 150 (medium 225 (high K). Compared with low-K application, medium-K high-...

We investigated the effects of three botanicals with nematicidal properties (anise-Pimpinella anisum, parsley-Petroselinum crispum, and rocket-Eruca sativa) on soil nematode community, in terms trophic structure genera composition. compared those fluopyram (synthetic nematicide) Nemagold (bionematicide). assessed role time, by sampling 15 45 days after treatments analyzing microbial phospholipi...

The existence of microbial activity hotspots in temperate regions Earth is driven by soil heterogeneities, especially the temporal and spatial availability nutrients. Here we investigate whether also exist lithic microhabitats one most arid world, Atacama Desert Chile. While previous studies evaluated total DNA fraction to elucidate communities, here for first time use a separation approach on ...

Biochar is used to improve soil fertility and mitigate climate change by carbon sequestration. The potential of using biochar together with plant growth promoting rhizobacteria (PGPR) as a fertilization technique, offers an alternative way for sustainable agriculture. In the present study acid stress adapted PGPR inoculants were applied in three different quantities order enhance maize crop yie...

Rhizosphere microbial communities are dynamic and play a crucial role in diverse biochemical processes nutrient cycling. Soil type cultivar modulate the composition of rhizosphere communities. Changes community significantly alter function ecological process. We examined influence soil on eubacterial diazotrophic abundance metabolic potential chickpea (cv. BG 372 cv. 256) rhizosphere. The total...

Forest fragmentation increases the proportion of edge area and this, in turn, induces changes forest structure, species composition microclimate. These factors are also strongly determined by management regime. Although interactive effects edges density on plant communities have been extensively studied, little is known about response belowground communities. Here we investigated variation soil...

In this study, we isolated and characterized bacterial strains from ancient (Neogene) permafrost sediment that was permanently frozen for 3.5 million years. The sampling site was located at Mammoth Mountain in the Aldan river valley in Central Yakutia in Eastern Siberia. Analysis of phospolipid fatty acids (PLFA) demonstrated the dominance of bacteria over fungi; the analysis of fatty acids spe...

Microbial community structure and functions of rhizosphere soil of rice were investigated after applying low and high doses of nitrogenous fertilizer and Phomopsis liquidambari. Average well color development, substrate richness, catabolic diversity and soil enzymes activities varied after applying N-fertilizer and P. liquidambari and were greater in P. liquidambari treated soil than only N-fer...