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Berlin Brandenburg

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    In: Environmental Microbiology, July 2019, Vol.21(7), pp.2426-2439
    Description: Long‐term agricultural fertilization strategies gradually change soil properties including the associated microbial communities. Cultivated crops recruit beneficial microbes from the surrounding soil environment root exudates. In this study, we aimed to investigate the effects of long‐term fertilization strategies across field sites on the rhizosphere prokaryotic ( and ) community composition and plant performance. We conducted growth chamber experiments with lettuce ( L.) cultivated in soils from two long‐term field experiments, each of which compared organic versus mineral fertilization strategies. 16S rRNA gene amplicon sequencing revealed the assemblage of a rhizosphere core microbiota shared in all lettuce plants across soils, going beyond differences in community composition depending on field site and fertilization strategies. The enhanced expression of several plant genes with roles in oxidative and biotic stress signalling pathways in lettuce grown in soils with organic indicates an induced physiological status in plants. Lettuce plants grown in soils with different fertilization histories were visibly free of stress symptoms and achieved comparable biomass. This suggests a positive aboveground plant response to belowground plant–microbe interactions in the rhizosphere. Besides effects of fertilization strategy and field site, our results demonstrate the crucial role of the plant in driving rhizosphere microbiota assemblage.
    Keywords: Soil Microbiology – Physiological Aspects ; Soil Microbiology – Analysis ; Plant Genetics – Physiological Aspects ; Plant Genetics – Analysis ; Plants (Organisms) – Physiological Aspects ; Plants (Organisms) – Analysis ; Soil Ecology – Physiological Aspects ; Soil Ecology – Analysis ; Microbiota (Symbiotic Organisms) – Physiological Aspects ; Microbiota (Symbiotic Organisms) – Analysis ; RNA – Physiological Aspects ; RNA – Analysis;
    ISSN: 1462-2912
    E-ISSN: 1462-2920
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