4.5 Article

The influence of maize genotype on the rhizosphere eukaryotic community

Journal

FEMS MICROBIOLOGY ECOLOGY
Volume 97, Issue 6, Pages -

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/femsec/fiab066

Keywords

rhizosphere; maize landrace; eukaryotic community; plant genotype; mycorrhiza

Categories

Funding

  1. Consejo Nacional de Ciencia yTecnologia [CONACYT 253116]
  2. PAPIIT-UNAM [IN207718]
  3. CONACYT [253771, 454848]

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The study demonstrates that plant growth and genotype significantly alter the eukaryotic community in the rhizosphere, while different maize genotypes have a selective influence on the relative abundance of fungal families in the rhizosphere.
The microbiota colonizing the rhizosphere contributes to plant growth, productivity, carbon sequestration and phytoremediation. Several studies address plant-associated bacteria; however, few studies analyze the effect of plant genotype on the eukaryotic community. Here, we analyzed the eukaryotic composition of maize rhizosphere from three different plant landraces and one inbred line grown in the same soil (common garden approach). This experimental design, coupled with 18S rDNA gene amplicon sequencing, allowed us to test the influence of maize and its genotype on the rhizosphere's eukaryotic community. We found that plant growth modified the eukaryotic community in soil, as diversity comparisons between maize rhizosphere and unplanted soil revealed significantly different eukaryotic composition. Various genera of nematodes and fungi, predominantly bacterial feeding nematodes and mycorrhizal fungi among other taxa, were increased in the rhizosphere samples. We also observed that maize genotype differentially shaped the relative abundance of the following fungal families in the rhizosphere: Acaulosporaceae, Aspergillaceae, Chaetomiaceae, Claroideoglomeraceae, Cortidaceae, Mortierellaceae, Trichocomaceae and Trichomeriaceae. Thus, plant genotype has a selective influence on establishing fungal communities in the rhizosphere. This study emphasizes the importance of an integrated consideration of plant genetics for future agricultural applications of microbes to crops.

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