Plant-soil Feedbacks
Plant-soil Feedbacks - Related Videos
07:40
A Gusseted Thermogradient Table to Control Soil Temperatures for Evaluating Plant Growth and Monitoring Soil Processes
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Cited by 5 •
2016
Traditional thermogradient tables create a range of temperatures across the surface. Welding gussets perpendicular to the surface of a thermogradient table will control temperature in depth increasing possible research applications.
12:36
High-throughput Siderophore Screening from Environmental Samples: Plant Tissues, Bulk Soils, and Rhizosphere Soils
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Cited by 8 •
2019
We present a protocol for rapid screening of environmental samples for siderophore potential contributing to micronutrient bioavailability and turnover in terrestrial systems.
08:44
Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis
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Cited by 2 •
2020
A microplot design for 15N tracer research is described to accommodate multiple in-season plant and soil sampling events. Soil and plant sample collection and processing procedures, including grinding and weighing protocols, for 15N analysis are put forth.
00:46
Feedback Inhibition
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2019
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell! Since enzymes help control the rate of reactions, their activity is regulated so that appropriate amounts of starting materials, intermediate metabolites, and products are maintained in the cell. Excessive build-up or depletion of...
12:03
Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil
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Cited by 13 •
2020
This protocol presents a workflow for sub-mm 2D visualization of multiple labile inorganic nutrient and contaminant solute species using diffusive gradients in thin films (DGT) combined with mass spectrometry imaging. Solute sampling and high-resolution chemical analysis are described in detail for quantitative mapping of solutes in the rhizosphere of terrestrial plants.
FAQs
Positive feedbacks arise when soil changes favor the plant or related plants that helped create those conditions, potentially reinforcing their persistence. Negative feedbacks occur when altered soils suppress those plants through pathogens, competition, or depleted resources. The balance between these effects can influence which species coexist, dominate a community, or decline during succession.
Roots directly modify the soil surrounding a plant, while litter contributes material that can change soil chemistry and nutrient availability. Associated microorganisms respond to these plant-driven changes and can further influence plant performance. Together, these components connect plant activity belowground with later effects on growth, survival, and the composition of plant communities.
Changes in nutrient availability, soil chemistry, and microbial communities can alter the direction and strength of a feedback. Conditions that improve access to nutrients or favor beneficial associations may support plant performance, whereas resource depletion, harmful pathogens, or intensified competition may suppress it. Consequently, the same plant can experience different outcomes as soil conditions change.
Feedbacks can change the relative success of several plants within the same community. If soil effects favor a plant or related species, those plants may become more persistent; if effects suppress them, other species may gain opportunities. These contrasting outcomes help connect belowground interactions with coexistence, shifts in community composition, and patterns of succession.
A useful conceptual sequence is to identify how a plant changes soil conditions and then evaluate how those altered conditions affect plant growth, survival, or community composition. Researchers can interpret the resulting response as positive when the changes favor the original or related plants, or negative when they suppress them through resource depletion, competition, or pathogens.
They are relevant whenever soil history or plant-driven changes may influence which plants establish and persist. In restoration, feedbacks can help explain why some species succeed after planting. In crop management, they provide context for how plants, soil conditions, and associated microorganisms may affect productivity, making belowground interactions important alongside aboveground management decisions.
Because feedbacks link plant activity with nutrient availability, soil chemistry, and microbial communities, environmental change can alter both sides of that interaction. The resulting shifts may strengthen or weaken plant growth, survival, and competitive relationships. Studying these responses helps predict changes in ecosystem productivity, succession, invasion, and the composition of vegetation communities.