Index Catalog // ScholarsArchive@OSU

Creator:: Fisk, Martin R., Thorseth, Ingunn H., Urbach, Ena, and Giovannoni, Stephen J.
Abstract:: During Leg 168 of the Ocean Drilling Program, basalts were recovered by drilling and subsurface water was collected with a water sampling tool at Hole 1026B on the east flank of Juan de Fuca Ridge. Microorganisms were found in both types of samples. The microorganisms in the basalt appear to...
Resource Type:: Article

Creator:: Fisk, Martin R. and Giovannoni, Stephen J.
Abstract:: Hydrothermal vents appear to be the tip of the subsurface biosphere in the ocean crust. The primary prducers in this biosphere are prokaryotes that tolerate a wide variety of physical and chemical conditions and are versatile in their use of inorganic compounds to drive metabolism. A synthesis of chemical and...
Resource Type:: Article

Creator:: Glass, Jennifer B., Kretz, Cecilia B., Ganesh, Sangita, Giovannoni, Stephen J., Vergin, Kevin L., Ranjan, Piyush, Seston, Sherry L., Buck, Kristen N., Landing, William M., Morton, Peter L., Moffet, James W., and Stewart, Frank J.
Abstract:: Iron (Fe) and copper (Cu) are essential cofactors for microbial metalloenzymes, but little is known about the metalloenyzme inventory of anaerobic marine microbial communities despite their importance to the nitrogen cycle. We compared dissolved O₂ , NO₃⁻, NO₂⁻, Fe and Cu concentrations with nucleic acid sequences encoding Fe and Cu-binding...
Resource Type:: Article

Creator:: Smith, Daniel P., Thrash, J. Cameron, Nicora, Carrie D., Lipton, Mary S., Burnum-Johnson, Kristin E., Carini, Paul, Smith, Richard D., and Giovannoni, Stephen J.
Abstract:: Nitrogen is one of the major nutrients limiting microbial productivity in the ocean, and as a result, most marine microorganisms have evolved systems for responding to nitrogen stress. The highly abundant alphaproteobacterium “Candidatus Pelagibacter ubique,” a cultured member of the order Pelagibacterales (SAR11), lacks the canonical GlnB, GlnD, GlnK, and...
Resource Type:: Article

Creator:: Ferla, Matteo P., Thrash, J. Cameron, Giovannoni, Stephen J., and Patrick, Wayne M.
Abstract:: Bacteria in the class Alphaproteobacteria have a wide variety of lifestyles and physiologies. They include pathogens of humans and livestock, agriculturally valuable strains, and several highly abundant marine groups. The ancestor of mitochondria also originated in this clade. Despite significant effort to investigate the phylogeny of the Alphaproteobacteria with a...
Resource Type:: Article

Creator:: Temperton, Ben and Giovannoni, Stephen J.
Abstract:: Since nucleic acids were first extracted directly from the environment and sequenced, metagenomics has grown to one of the most data-rich and pervasive techniques for understanding the taxonomic and functional diversity of microbial communities. In the last decade, cheaper sequencing has democratized the application of metagenomics and generated billions of...
Resource Type:: Article

Creator:: Grote, Jana, Thrash, J. Cameron, Huggett, Megan J., Landry, Zachary C., Carini, Paul, Giovannoni, Stephen J., and Rappe, Michael S.
Abstract:: SAR11 is an ancient and diverse clade of heterotrophic bacteria that are abundant throughout the world's oceans, where they play a major role in the ocean carbon cycle. Correlations between the phylogenetic branching order and spatiotemporal patterns in cell distributions from planktonic ocean environments indicate that SAR11 has evolved into...
Resource Type:: Article

Creator:: Desiderio, Russell A., Laney, Samuel R., Letelier, Ricardo M., and Giovannoni, Stephen J.
Abstract:: We constructed an experimental apparatus that used lasers to provide the probe beams for measuring the transient absorption kinetics of bacterioplankton that contain proteorhodopsin, a microbial protein that binds retinal and is analogous to animal rhodopsin. With this approach we were able to observe photocycles characteristic of functioning retinylidene ion...
Resource Type:: Article

Creator:: Giovannoni, Stephen J., Fisk, Martin R., Mullins, Thomas D., and Furnes, Harald
Abstract:: The majority of the Earth's shallow crust is composed of basalt that erupted on the seafloor and was subsequently altered by chemical exchange with seawater. One aspect of this alteration is the replacement of glass by secondary minerals, including clays. Petrographic thin sections from ODP Holes 504B and 896A revealed...
Resource Type:: Article

ScholarsArchive@OSU