title: Impact of soil heat on reassembly of bacterial communities in the rhizosphere microbiome and plant disease suppression.
abstract: The rhizosphere microbiome offers a range of ecosystem services to the plant, including nutrient acquisition and tolerance to (a)biotic stress. Here, analysing the data by Mendes et al. (2011), we show that short heat disturbances (50 or 80 °C, 1 h) of a soil suppressive to the root pathogenic fungus Rhizoctonia solani caused significant increase in alpha diversity of the rhizobacterial community and led to partial or complete loss of disease protection. A reassembly model is proposed where bacterial families that are heat tolerant and have high growth rates significantly increase in relative abundance after heat disturbance, while temperature-sensitive and slow-growing bacteria have a disadvantage. The results also pointed to a potential role of slow-growing, heat-tolerant bacterial families from Actinobacteria and Acidobacteria phyla in plant disease protection. In conclusion, short heat disturbance of soil results in rearrangement of rhizobacterial communities and this is correlated with changes in the ecosystem service disease suppression.
authors.affiliation: Laboratory of Phytopathology, Wageningen University, Wageningen, Netherlands.
authors.forename: Menno
authors.initials: M
authors.lastname: van der Voort
authors.affiliation: The Netherlands Bioinformatics Centre (NBIC), Nijmegen, Netherlands.
authors.forename: Marcel
authors.initials: M
authors.lastname: Kempenaar
authors.affiliation: The Netherlands Bioinformatics Centre (NBIC), Nijmegen, Netherlands.
authors.forename: Marc
authors.initials: M
authors.lastname: van Driel
authors.affiliation: Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO/KNAW), Wageningen, Netherlands.|Institute of Biology, Leiden University, Wageningen, Netherlands.
authors.forename: Jos M
authors.initials: JM
authors.lastname: Raaijmakers
authors.affiliation: Laboratory of Environmental Microbiology, Embrapa Environment, Jaguariuna, Brazil.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Mendes
mesh_terms: D018407:Bacterial Physiological Phenomena; D006358:Hot Temperature; D056265:Microbial Interactions / Q000502:physiology*; D064307:Microbiota / Q000502:physiology*; D010935:Plant Diseases / Q000382:microbiology; D018517:Plant Roots / Q000382:microbiology; D010944:Plants / Q000382:microbiology*; D012232:Rhizoctonia / Q000502:physiology; D058441:Rhizosphere; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology
chemical_list: D012987:Soil
keywords: Bacterial diversity; PhyloProfiler; disease-suppressive soils; disturbance; rhizosphere; rhizosphere microbiome