IMPACT4SOIL OpenAire u:cris UnpayWall Crossref Microsoft Academic Graph OpenAPC Global Initiative Europe PubMed Central PubMed Central New Phytologist Open Access 2013-10-31 Summary<p> <p>Drought affects plants and soil microorganisms, but it is still not clear how it alters the carbon (C) transfer at the plant￢ﾀﾓmicrobial interface. Here, we tested direct and indirect effects of drought on soil microbes and microbial turnover of recent plant￢ﾀﾐderived C in a mountain meadow.</p> <p>Microbial community composition was assessed using phospholipid fatty acids (PLFAs); the allocation of recent plant￢ﾀﾐderived C to microbial groups was analysed by pulse￢ﾀﾐlabelling of canopy sections with 13CO2 and the subsequent tracing of the label into microbial PLFAs.</p> <p>Microbial biomass was significantly higher in plots exposed to a severe experimental drought. In addition, drought induced a shift of the microbial community composition, mainly driven by an increase of Gram￢ﾀﾐpositive bacteria. Drought reduced belowground C allocation, but not the transfer of recently plant￢ﾀﾐassimilated C to fungi, and in particular reduced tracer uptake by bacteria. This was accompanied by an increase of 13C in the extractable organic C pool during drought, which was even more pronounced after plots were mown.</p> <p>We conclude that drought weakened the link between plant and bacterial, but not fungal, C turnover, and facilitated the growth of potentially slow￢ﾀﾐgrowing, drought￢ﾀﾐadapted soil microbes, such as Gram￢ﾀﾐpositive bacteria.</p> </p> Time Factors Nitrogen Mowing Mountain grassland Carbon Cycle Microbial community composition Soil Biomass Ecosystem Soil Microbiology 2. Zero hunger 106022 Mikrobiologie Carbon Isotopes Drought Research Microbiota Water Carbon allocation Microclimate 04 agricultural and veterinary sciences 15. Life on land Carbon 6. Clean water Droughts C pulse-labelling 13. Climate action Austria Phospholipid fatty acids 106022 Microbiology 0401 agriculture, forestry, and fisheries Roland Hasibeder, Michael Bahn, Andreas Richter, Karina Fritz, Lucia Fuchslueger, 2013-10-31 journalpaper Summary<p> <p>Drought affects plants and soil microorganisms, but it is still not clear how it alters the carbon (C) transfer at the plant￢ﾀﾓmicrobial interface. Here, we tested direct and indirect effects of drought on soil microbes and microbial turnover of recent plant￢ﾀﾐderived C in a mountain meadow.</p> <p>Microbial community composition was assessed using phospholipid fatty acids (PLFAs); the allocation of recent plant￢ﾀﾐderived C to microbial groups was analysed by pulse￢ﾀﾐlabelling of canopy sections with 13CO2 and the subsequent tracing of the label into microbial PLFAs.</p> <p>Microbial biomass was significantly higher in plots exposed to a severe experimental drought. In addition, drought induced a shift of the microbial community composition, mainly driven by an increase of Gram￢ﾀﾐpositive bacteria. Drought reduced belowground C allocation, but not the transfer of recently plant￢ﾀﾐassimilated C to fungi, and in particular reduced tracer uptake by bacteria. This was accompanied by an increase of 13C in the extractable organic C pool during drought, which was even more pronounced after plots were mown.</p> <p>We conclude that drought weakened the link between plant and bacterial, but not fungal, C turnover, and facilitated the growth of potentially slow￢ﾀﾐgrowing, drought￢ﾀﾐadapted soil microbes, such as Gram￢ﾀﾐpositive bacteria.</p> </p> Experimental Drought Reduces The Transfer Of Recently Fixed Plant Carbon To Soil Microbes And Alters The Bacterial Community Composition In A Mountain Meadow 10.1111/nph.12569 https://doi.org/10.1111/nph.12569