Impact of Soil Microbial Amendments on Tomato Rhizosphere Microbiome and Plant Growth in Field Soil

Microbial Ecology
Andrea NuzzoSarah L Strauss

Abstract

There is increased interest by the agricultural industry in microbial amendments that leverage natural beneficial interactions between plants and soil microbes to improve crop production. However, translating fundamental knowledge from laboratory experiments into efficient field application often has mixed results, and there is less clarity about the interaction between added microbes and the native microbial community, where microorganisms belonging to the same phylogenic clades often reside. In this study, four commercially available microbial amendments were examined in two greenhouse experiments using field soil to assess their impact on tomato plant growth and the native soil microbial communities. The amendments contained different formulations of plant growth-promoting bacteria (Lactobacilli, Rhizobia, etc.), yeasts, and mycorrhizal fungi. The application of the tested amendments in greenhouse conditions resulted in no significant impact on plant growth. A deeper statistical analysis detected variations in the microbial communities that accounted only for 0.25% of the total species, particularly in native taxa not related to the inoculated species and represented less than 1% of the total variance. This suggests that und...Continue Reading

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Datasets Mentioned

BETA
PRJNA527973

Methods Mentioned

BETA
Assay
16S sequencing
PCR

Software Mentioned

R package “ MASS ”
scikit
R package “ agricolae ”
R package “ Phyloseq ”
R package “ corrplot ”
GridSearchCV
DADA2
learn
PEAR
vegan

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