Record ID No. |
5739 |
Author(s) |
Kaminsky L. M.*, Thompson G. L., Trexler R. V., Bell T. H. and Kao-Kniffin J. , 2018 |
Affiliation |
*School of Integrative Plant Science, Cornell University, Ithaca, NY; Department of Plant Pathology and Environmental Microbiology, The Pennsylvania State University, University Park. |
Title |
Medicago sativa has reduced Biomass and Nodulation when grown with soil microbiomes conditions to high phosphorus inputs. |
Source. Vol.(no):Page |
Phytobiomes Journal. 2(4): 237-248. |
Categories |
|
Subjects |
Biological Interaction Ecology Physiology |
Sub-subjects |
Phosphorus metabolism |
Host |
Medicago sativa |
Organism |
NA |
Country |
USA |
Abstracts |
Agricultural over-fertilization may adversely impact plant-microbial interactions affecting crop yield. It is unclear if soil mirobiomes 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), ;ow organic P (low triple superphosphate, TSP) and high inorganic P (high TSP). After several conditioning generations, in which microbiomes from rhizospheres composition was distinct across the four treatments. The resulting microbiomes were then transplanted into each of the nutrient treatments, leading generally to functional changes in the hydrolytic enzyme activity and taxonomic convergence with other microbiomes transplanted into the same nutrient regime. However, high inorganic P-conditioned microbiomes were resistant to compositional change. Correspondingly, M. sativa grown in with high inorganic P-conditioned microbiomes had lower biomass, fewer nodules, and lower %N than plants grown under the same nutrient regime with other microbiomes. These findings suggest that excessive inorganic P fertilization may change microbiomes such that they negatively affect plant growth. |