A5071955670- Plant-Microbe Interactions and Immunity
- Legume Nitrogen Fixing Symbiosis
- Landfill Environmental Impact Studies
- Plant Stress Responses and Tolerance
- Soil Carbon and Nitrogen Dynamics
- Nematode management and characterization studies
- Microbial Community Ecology and Physiology
- Mycorrhizal Fungi and Plant Interactions
- Soil and Unsaturated Flow
- Geochemistry and Elemental Analysis
- Bacterial biofilms and quorum sensing
- Atmospheric and Environmental Gas Dynamics
- Photosynthetic Processes and Mechanisms
- Polymer-Based Agricultural Enhancements
- Fermentation and Sensory Analysis
- Seedling growth and survival studies
- Soil Geostatistics and Mapping
- Horticultural and Viticultural Research
- earthquake and tectonic studies
- Landslides and related hazards
- Agriculture, Soil, Plant Science
- Plant Micronutrient Interactions and Effects
- Allelopathy and phytotoxic interactions
- Grouting, Rheology, and Soil Mechanics
- Plant nutrient uptake and metabolism
Agricultural Research Service
2018-2025
Quality Research
2018-2021
Washington State University
2014-2021
United States Department of Agriculture
2018-2019
United States Department of State
2019
Ministère des Transports
2017
Université de Sherbrooke
2010
Plants live in association with microorganisms that positively influence plant development, vigor, and fitness response to pathogens abiotic stressors. The bulk of the microbiome is concentrated belowground at root-soil interface. Plant roots secrete carbon-rich rhizodeposits containing primary secondary low molecular weight metabolites, lysates, mucilages. These exudates provide nutrients for soil modulate their affinity host plants, but details this process are largely unresolved. We...
Plants and their associated microbiomes are impacted by environmental factors that shape interactions over time, but long-term trends in microbial community dynamics not well characterized. We identified the seasonal population of root-associated bacterial communities 8 years monocropped wheat grown adjacent dryland irrigated plots low-precipitation region Washington State. Spring plants were sampled at various times during growing season years, rhizosphere endosphere characterized using 16S...
Summary Phenazine‐1‐carboxylic acid (PCA) is produced by rhizobacteria in dryland but not irrigated wheat fields of the Pacific Northwest, USA. PCA promotes biofilm development bacterial cultures and colonization rhizospheres. However, its impact upon has been demonstrated rhizosphere, where biofilms influence terrestrial carbon nitrogen cycles with ramifications for crop soil health. Furthermore, relationships between moisture rates biosynthesis degradation have established. In this study,...
Future efforts to increase agricultural productivity will focus on crops as functional units comprised of plants and their associated microflora in the context various environments which they are grown. It is suggested that future beneficial microorganisms Scientists, industry, farmers must work closely together develop, adapt, apply new technologies a wide range cropping systems. Consumer education needed help grow public awareness 'plant probiotics' offer safe environmentally friendly...
Phenazine-1-carboxylic acid (PCA) is a broad-spectrum antibiotic produced by rhizobacteria in the dryland wheat fields of Columbia Plateau. PCA and other phenazines reductively dissolve Fe Mn oxyhydroxides bacterial culture systems, but impact upon cycling rhizosphere unknown. Here, concentrations dithionite-extractable poorly crystalline were approximately 10% 30–40% higher, respectively, irrigated rhizospheres inoculated with PCA-producing (PCA+) strain Pseudomonas synxantha 2–79 than...
Highlights Continuous no-tillage with fertilizer deep-banded below the seed can result in stratified soil acidity that cannot be rapidly addressed surface-applied lime. We modified a tractor-driven sweep implement to inject fluid lime targets sub-surface minimal disturbance maintains surface crop residues, and tested it prior seeding winter peas at 4 liming rates. Soil chemistry, microbiology, growth were monitored over season. Abstract. Deep-banding ammonia urea-based nitrogen fertilizers...
Passive Methane Oxidation Biocovers (PMOBs) are large-scale biofilters that reduce methane emissions from landfill sites through incorporation of a substrate provides favorable conditions for methanotrophic bacteria. This paper addresses some key geotechnical issues must be considered in the development rational designs PMOBs. In particular, properties unsaturated cover soils should selected to lead liquid and gas flow which optimal oxidation discussed. Modeling assess impacts water...
Journal Article Impact of Phenazine-1-carboxylic acid upon Biofilm Development in the Rhizosphere Dryland and Irrigated Wheat Get access Melissa K LeTourneau, LeTourneau Department Crop Soil Sciences, Washington State University, Pullman, WA, USA Search for other works by this author on: Oxford Academic Google Scholar Matthew M Marshall, Marshall Pacific Northwest National Laboratory, United States Energy, Richland, Linda S Thomashow, Thomashow Agricultural Research Service, Agriculture,...
Soil acidification is a major problem in the inland Pacific Northwest. A potential solution application of lime to neutralize acidity and raise pH. As an expensive input, precision variable rate necessary. However, high-resolution mapping pH buffer for prescription requires costly sampling analysis. To reduce amount needed, remote sensing, which correlates with soil pH, can be used determine optimal locations allow interpolation. We crop data from Washington State University R.J. Cook...
As part of a field study aiming at evaluating the efficiency mixture coarse materials (sand and gravel) with compost to oxidize fugitive CH4 emissions, column tests were performed results compared values obtained from an experimental biocover where loading was controlled. Three oxidation samples taken this biocover: For 1st, 0.30-m high sample compacted degree (water) saturation, Sr = 40% (air-filled porosity 28.6%). The maximum rate 75 g CH4/m2/d. 2nd, placed 63% 50 3rd test, 0.45-m 45%...
Abstract Plants live in association with microorganisms that positively influence plant development, vigor, and fitness response to pathogens abiotic stressors. The bulk of the microbiome is concentrated belowground at root-soil interface. Plant roots secrete carbon-rich rhizodeposits containing primary secondary low molecular-weight metabolites, lysates, mucilages. These exudates provide nutrients for soil modulate their affinity host plants, but molecular details this process are largely...
<b><sc>Abstract.</sc></b> Global food security is critical as the global population grows and extreme weather events such droughts, heat waves, large storms become more frequent or intense due to climate change. Crop yield quality performance are affected by many factors crop variety, soil type, management practices, pests diseases, patterns during season. A crop‘s response these their interactions highly nonlinear frequently difficult understand. Transparent process-based modeling simulate...