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Distinct rhizomicrobiota assemblages and plant performance in lettuce grown in soils with different agricultural management histories

GND
1014430453
Affiliation
Julius Kühn-Institute (JKI), Institute for Epidemiology and Pathogen Diagnostics, Germany
Babin, Doreen;
Affiliation
Anhalt University of Applied Sciences, Department of Agriculture, Ecotrophology and Landscape Development, Institute of Bioanalytical Sciences (IBAS), Germany
Sommermann, Loreen;
Affiliation
Institute of Network Biology, German Research Center for Environmental Health, Helmholtz Zentrum, Germany
Chowdhury, Soumitra Paul;
Affiliation
Leibniz Institute of Vegetable and Ornamental Crops (IGZ), Plant-Microbe Systems, Germany
Behr, Jan H.;
Affiliation
Leibniz Institute of Vegetable and Ornamental Crops (IGZ), Plant-Microbe Systems, Germany
Sandmann, Martin;
Affiliation
University of Hohenheim, Institute of Crop Science, Department of Nutritional Crop Physiology, Germany
Neumann, Günter;
Affiliation
University of Copenhagen, Department of Biology, Section of Microbiology, Denmark
Nesme, Joseph;
Affiliation
University of Copenhagen, Department of Biology, Section of Microbiology, Denmark
Sørensen, Søren J;
Affiliation
Anhalt University of Applied Sciences, Department of Agriculture, Ecotrophology and Landscape Development, Institute of Bioanalytical Sciences (IBAS), Germany
Schellenberg, Ingo;
Affiliation
Institute of Network Biology, German Research Center for Environmental Health, Helmholtz Zentrum Germany
Rothballer, Michael;
Affiliation
Anhalt University of Applied Sciences, Department of Agriculture, Ecotrophology and Landscape Development, Institute of Bioanalytical Sciences (IBAS), Germany
Geistlinger, Joerg;
GND
1058967878
Affiliation
Julius Kühn-Institute (JKI), Institute for Epidemiology and Pathogen Diagnostics, Germany
Smalla, Kornelia;
Affiliation
Leibniz Institute of Vegetable and Ornamental Crops (IGZ), Plant-Microbe Systems, Germany
Grosch, Rita

A better understanding of factors shaping the rhizosphere microbiota is important for sustainable crop production. We hypothesized that the effect of agricultural management on the soil microbiota is reflected in the assemblage of the rhizosphere microbiota with implications for plant performance. We designed a growth chamber experiment growing the model plant lettuce under controlled conditions in soils of a long-term field experiment with contrasting histories of tillage (mouldboard plough vs cultivator tillage), fertilization intensity (intensive standard nitrogen (N) + pesticides/growth regulators vs extensive reduced N without fungicides/growth regulators), and last standing field crop (rapeseed vs winter wheat). High-throughput sequencing of bacterial and archaeal 16S rRNA genes and fungal ITS2 regions amplified from total community DNA showed that these factors shaped the soil and rhizosphere microbiota of lettuce, however, to different extents among the microbial domains. Pseudomonas and Olpidium were identified as major indicators for agricultural management in the rhizosphere of lettuce. Long-term extensive fertilization history of soils resulted in higher lettuce growth and increased expression of genes involved in plant stress responses compared to intensive fertilization. Our work adds to the increasing knowledge on how soil microbiota can be manipulated by agricultural management practices which could be harnessed for sustainable crop production.

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