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Recent research suggests that micronutrients such as Mn may limit growth of slow-growing biological soil crusts (BSCs) in some of the drylands of the world. These soil surface communities contribute strongly to arid ecosystem function and are easily degraded, creating a need for new restoration tools. The possibility that Mn fertilization could be used as a restoration tool for BSCs has not been tested previously. We used microcosms in a controlled greenhouse setting to investigate the hypothesis that Mn may limit photosynthesis and consequently growth in Collema tenax, a dominant N-fixing lichen found in BSCs worldwide. We found no evidence to support our hypothesis; furthermore, addition of other nutrients (primarily...
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These data show grass crop and model species response to toxic chemicals (Arsenic (As)) and humic acids. Experiments were performed by collaboration between the U.S. Geological Survey, Rutgers University, and Rey Juan Carlos University. A series of individual experiments investigated beneficial effects of endophytic bacteria on grass crop growth and resilience to known plant toxicity.
Data are presented on the physiological diagnostics of cyanobacterial communication with higher plants in natural symbioses (plant syncyanoses) and in model associations, as well as on the interaction of the partners without spatial integration. Emphasis is placed on changes in cyanobacterial features important for symbiogenesis. The multicomponent composition and the possible nature of the factors that enable partner communications are discussed with hormogonia formation and taxis as an example. Published in Microbiology, volume 75, issue 4, on pages 465 - 469, in 2006.
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Despite being one of the most prevalent forms of consumerism in ecological communities, parasitism has largely been excluded from food-web models. Stable isotope analysis of consumers and their diets has been widely used in the study of food-webs for decades. However, the amount of information regarding parasite stable isotope ecology is limited, restricting the ability of ecologists to use stable isotope analysis to study parasites in food-webs. This study took advantage of distinct differences in the feeding ecology and trophic position of different species of fish known to host the same common micropredatory gnathiid isopod, to study the effects of host stable isotope ecology on that of the associated micropredator....
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Description of Work The invasive form of Phragmites australis (common reed) is a well-established pest in many parts of the Great Lakes and the Atlantic, Gulf, and Pacific coasts, including designated Areas of Concern. New innovative control options that sustainably target the competitive advantage often enjoyed by Phragmites and other invasive plants will contribute to a broad Integrated Pest Management (IPM) strategy. This project targets the microorganisms that may help Phragmites spread and will employ a molecular genetic approach to silence the genes in Phragmites that give it a competitive edge over many native plants. This project helped build and will continue to be closely aligned with the Great Lakes Phragmites...
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Plant roots have the best-understood mutualisms with microbes, but leaf and bract cell endosymbiosis have not been previously reported. Leaf and bract cells of more than 30 species in 18 families of seed plants were surveyed for the presence of intracellular bacteria and several experiments were designed to find and analyze nutrient exchanges between bacteria and plant cells. This dataset contains the results of 1) histochemical analyses to detect hormones, superoxide, and nitrogenous chemicals around bacteria within plant leaf and bract cells, 2) experiments to assess the differential absorption of isotopic nitrogen into plants, and 3) genetic analysis of bacteria isolated from plant material.
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This data record contains arbuscular mycorrhizal fungi (AMF) operational taxonomic unit (OTU) occurrences with native prairie plant species roots collected from paired remnant and reconstructed prairies, as well as soil physical and chemical property data from these field sites in Minnesota and Iowa.
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These datasets provide geographic sampling information for Bathymodiolin mussels collected from three cold seep sites off the mid-Atlantic U.S. coast, northwestern Atlantic Ocean. Also included are GenBank accession numbers for mitochondrial gene sequences (COI and ND4) and sequence alignments (File1_mussels) used in phylogenetic analyses for molecular identification of the mussel species. Additionally, GenBank accession numbers for the BioProject containing 16S metabarcoding sequence data used to identify gill symbionts in mussels are provided, along with supporting details for the analyses performed on the 16S metabarcoding data (File2_Symbionts).
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Bacteria were isolated from seeds of non-native Phragmites australis (haplotype M) then representatives were evaluated for their capacities to become intracellular in root cells, and their effects on: 1.) germination rates and seedling growth, 2.) susceptibility to damping-off disease, and 3.) mortality and growth of competitor plant seedlings (dandelion (Taraxacum officionale F. H. Wigg) and curly dock (Rumex crispus L.)). The experiments included the following assessments of Phragmites-associated bacteria (Pseudomonas spp, strains Sandy LB4 (Pseudomonas fluorescens) and West 9 (Pseudomonas sp.)): capacity for plant growth promotion (using Poa annua seeds), Poa annua and Phragmites australis seed germination and...


    map background search result map search result map Invasive Phragmites: Prevention, Monitoring, and Control Strategies in an Integrated Pest Management Framework Native and Invasive Species Plant Growth and Mortality in Growth Media Inoculated with Bacteria Found on Phragmites From New Jersey (2016) Host feeding ecology and trophic position significantly influence isotopic discrimination between a generalist ectoparasite and its hosts: implications for parasite-host trophic studies Molecular characterization of deep-sea bathymodiolin mussels and gill symbionts from the U.S. mid-Atlantic margin Data collected to support research on grass crop growth promotion and biostimulation by endophytic bacteria Arbuscular mycorrhizal fungi in remnant and reconstructed prairies in Minnesota and Iowa, 2019 (ver. 2.0, April 2022) Histochemical study of nitrogen-transfer endosymbiosis Host feeding ecology and trophic position significantly influence isotopic discrimination between a generalist ectoparasite and its hosts: implications for parasite-host trophic studies Molecular characterization of deep-sea bathymodiolin mussels and gill symbionts from the U.S. mid-Atlantic margin Native and Invasive Species Plant Growth and Mortality in Growth Media Inoculated with Bacteria Found on Phragmites From New Jersey (2016) Arbuscular mycorrhizal fungi in remnant and reconstructed prairies in Minnesota and Iowa, 2019 (ver. 2.0, April 2022) Invasive Phragmites: Prevention, Monitoring, and Control Strategies in an Integrated Pest Management Framework Histochemical study of nitrogen-transfer endosymbiosis Data collected to support research on grass crop growth promotion and biostimulation by endophytic bacteria