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Articles 1 - 4 of 4
Full-Text Articles in Life Sciences
A Novel Approach To The Discovery Of Natural Products From Actinobacteria, Rahmy Tawfik
A Novel Approach To The Discovery Of Natural Products From Actinobacteria, Rahmy Tawfik
USF Tampa Graduate Theses and Dissertations
Actinobacteria, primarily the genus Streptomyces, have led to the development of a number of antibiotics, which result from their secondary metabolites or modified derivatives. Secondary metabolite production can result from competition with neighboring microbes in an effort to disrupt growth, aiding in the competition for vital nutrients in impoverished conditions. Such secondary metabolites have the potential to affect a plethora of cellular functions in target cells, including, cell wall development, protein synthesis, protein function and fatty acid synthesis/metabolism. Due to the pandemic spread of antibiotic resistant bacteria, it is imperative to continue the search for new therapeutic agents …
Importance Of Lateral Flux And Its Percolation Depth On Organic Carbon Export In Arctic Tundra Soil: Implications From A Soil Leaching Experiment, Xiaowen Zhang, Jack A. Hutchings, Thomas S. Bianchi, Yina Liu, Ana Arellano, Edward A. Schuur
Importance Of Lateral Flux And Its Percolation Depth On Organic Carbon Export In Arctic Tundra Soil: Implications From A Soil Leaching Experiment, Xiaowen Zhang, Jack A. Hutchings, Thomas S. Bianchi, Yina Liu, Ana Arellano, Edward A. Schuur
Marine Science Faculty Publications
Temperature rise in the Arctic is causing deepening of active layers and resulting in the mobilization of deep permafrost dissolved organic matter (DOM). However, the mechanisms of DOM mobilization from Arctic soils, especially upper soil horizons which are drained most frequently through a year, are poorly understood. Here we conducted a short-term leaching experiment on surface and deep organic active layer soils, from the Yukon River basin, to examine the effects of DOM transport on bulk and molecular characteristics. Our data showed a net release of DOM from surface soils equal to an average of 5% of soil carbon. Conversely, …
Home-Field Advantage? Evidence Of Local Adaptation Among Plants, Soil, And Arbuscular Mycorrhizal Fungi Through Meta-Analysis, Megan A. Rúa, Anita Antoninka, Pedro M. Antunes, V Bala Chaudhary, Catherine Gehring, Louis J. Lamit, Bridget J. Piculell, James D. Bever, Cathy Zabinski, James F. Meadow, Marc J. Lajeunesse, Brook G. Milligan, Justine Karst, Jason D. Hoeksema
Home-Field Advantage? Evidence Of Local Adaptation Among Plants, Soil, And Arbuscular Mycorrhizal Fungi Through Meta-Analysis, Megan A. Rúa, Anita Antoninka, Pedro M. Antunes, V Bala Chaudhary, Catherine Gehring, Louis J. Lamit, Bridget J. Piculell, James D. Bever, Cathy Zabinski, James F. Meadow, Marc J. Lajeunesse, Brook G. Milligan, Justine Karst, Jason D. Hoeksema
Integrative Biology Faculty and Staff Publications
BACKGROUND: Local adaptation, the differential success of genotypes in their native versus foreign environment, arises from various evolutionary processes, but the importance of concurrent abiotic and biotic factors as drivers of local adaptation has only recently been investigated. Local adaptation to biotic interactions may be particularly important for plants, as they associate with microbial symbionts that can significantly affect their fitness and may enable rapid evolution. The arbuscular mycorrhizal (AM) symbiosis is ideal for investigations of local adaptation because it is globally widespread among most plant taxa and can significantly affect plant growth and fitness. Using meta-analysis on 1170 studies …
Nitrogen Inputs And Losses In Response To Chronic Co2 Exposure In A Subtropical Oak Woodland, B. A. Hungate, B. D. Duval, P. Dijkstra, D. W. Johnson, M. E. Ketterer, Peter Stiling, W. Cheng, J. Millman, A. Hartley, D. B. Stover
Nitrogen Inputs And Losses In Response To Chronic Co2 Exposure In A Subtropical Oak Woodland, B. A. Hungate, B. D. Duval, P. Dijkstra, D. W. Johnson, M. E. Ketterer, Peter Stiling, W. Cheng, J. Millman, A. Hartley, D. B. Stover
Integrative Biology Faculty and Staff Publications
Rising atmospheric CO2 concentrations may alter the nitrogen (N) content of ecosystems by changing N inputs and N losses, but responses vary in field experiments, possibly because multiple mechanisms are at play. We measured N fixation and N losses in a subtropical oak woodland exposed to 11 years of elevated atmospheric CO2 concentrations. We also explored the role of herbivory, carbon limitation, and competition for light or nutrients in shaping the response of N fixation to elevated CO2. Elevated CO2 did not significantly alter gaseous N losses, but lower recovery and deeper distribution in the …