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Medicago Sativa Has Reduced Biomass And Nodulation When Grown With Soil Microbiomes Conditioned To High Phosphorus Inputs, Laura M. Kaminsky, Grant L. Thompson, Ryan V. Trexler, Terrence H. Bell, Jenny Kao-Kniffin
Medicago Sativa Has Reduced Biomass And Nodulation When Grown With Soil Microbiomes Conditioned To High Phosphorus Inputs, Laura M. Kaminsky, Grant L. Thompson, Ryan V. Trexler, Terrence H. Bell, Jenny Kao-Kniffin
Grant Thompson
Agricultural over-fertilization may adversely impact plant−microbial interactions affecting crop yield. It is unclear if soil microbiomes respond quickly to changes in fertilizer inputs once conditioned to specific nutrient regimes. We conducted a growth chamber study assessing the compositional and functional resilience of root-associated microbiomes of Medicago sativa to nutrient regime changes, and consequences for plant growth. Plants were grown with a common starting soil microbiome under four nutrient treatments: control (no fertilizer), organic phosphorus (compost added), low inorganic P (low triple superphosphate, TSP) and high inorganic P (high TSP). After several conditioning generations, in which microbiomes from rhizospheres of high …