Results 91 to 100 of about 23,173 (224)

Atrazine-Induced Chlorosis in Synechococcus elongatus Cells [PDF]

Archives of Environmental Contamination and Toxicology, 2004
The effects of a widely used herbicide, atrazine, on the freshwater cyanobacterium Synechococcus elongatus were studied. The cyanobacteria were exposed to varying concentrations of atrazine (0.025, 0.05, 0.1, 0.25, and 0.75 microM) for 96 h. Different parameters such as growth, autofluorescence of chlorophyll a, pigment content, volume, and internal ...
González Barreiro, Óscar, Rioboo, Carmen, Cid, Ángeles, Herrero, Concepción   +3 more
openaire   +3 more sources

Photosynthetic primary production in the Mesoproterozoic

New Phytologist, Volume 251, Issue 1, Page 64-80, July 2026.
Summary The Mesoproterozoic atmosphere had more CO2 and less O2 than at present. While the upper ocean was oxygenated, the deeper ocean was euxinic or ferruginous. Primary production was performed by Chlorobia, Cyanobacteria, Proteobacteria, and Archaeplastida.
Patricia Sánchez‐Baracaldo, John A. Raven   +1 more
wiley   +1 more source

Relationship of Synechococcus Abundance to Seasonal Ocean Temperature Ranges

Terrestrial, Atmospheric and Oceanic Sciences, 2013
The abundance of Synechococcus in the East China Sea (ECS) was tracked during two sets of cruises in 1997 - 1998 and 2004. These data were combined with information from the literature to examine the hypothesis wherein variations in Synechococcus ...
An-Yi Tsai, Gwo-Ching Gong, Robert W Sanders, Kuo-Ping Chiang   +3 more
doaj   +1 more source

Exploring Global Patterns of Trace Metal Limitation as a Regulator of the Distribution of Dominant Marine Phytoplankton Groups

Global Change Biology Communications, Volume 1, Issue 2, June 2026.
By synthesizing decades of culture data with modern oceanographic datasets, we modelled trace metal limitation of phytoplankton. Our analysis reaffirms the critical role of iron but additionally highlights a significant, growing impact of zinc on the biological pump in future oceans.
Qiong Zhang, Yu Zhou, Jiayou Ge, Samuel Barton, Fengjie Liu, Roxana Shafiee, Kedong Yin, Heather A. Bouman, Alessandro Tagliabue, Rosalind E. M. Rickaby   +9 more
wiley   +1 more source

Mining genomes of marine cyanobacteria for elements of zinc homeostasis [PDF]

, 2012
Zinc is a recognized essential element for the majority of organisms, and is indispensable for the correct function of hundreds of enzymes and thousands of regulatory proteins.
Schmid, Ralf, A. Millard (3584540), Ksibe, Amira Z., Andrew eMillard, James P. Barnett, Amira Z. Ksibe, D. J. Scanlan (7640840), A. Z. Ksibe (7640837), David J. Scanlan, Amira eKsibe, J. P. Barnett (7640834), Barnett, James P., Ralf eSchmid, Scanlan, David J., James P. Barnett, Millard, Andrew D., Blindauer, Claudia A., James P Barnett, R. Schmid (7606553), C. A. Blindauer (7640843), Claudia Andrea Blindauer, Andrew Millard, David J Scanlan, Ralf Schmid   +23 more
core   +1 more source

Factors affecting antimicrobial activity of Synechococcus leopoliensis

Microbiological Research, 2004
An antimicrobial agent is produced by the cyanobacterium Synechococcus leopoliensis which was found to be active against the Gram-positive bacterium Staphylococcus aureus. The effects of temperature, pH, incubation period, some media and different nitrogen and carbon sources on both growth and antimicrobial activity were investigated.
Noaman, Nadia H., Fattah, Abdel, Khaleafa, M., Zaky, Seham H.   +3 more
openaire   +2 more sources

Urea provides an important nitrogen source for microbial populations in an ultraoligotrophic sea

Limnology and Oceanography, Volume 71, Issue 6, June 2026.
Urea is an organic nitrogen (N) compound directly utilized by both heterotrophic prokaryotes and some photoautotrophs. Reports of either ambient urea concentrations or urea uptake rates from the ultraoligotrophic eastern Mediterranean Sea are lacking. We investigated urea distribution and uptake in the upper water column in the Levantine basin during ...
Alon Blachinsky, Tal Ben Ezra, Shiran Gozali, Anat Tsemel, Dan Tchernov, Mark Altabet, Ilana Berman‐Frank, Michael David Krom   +7 more
wiley   +1 more source

Phototaxis in a wild isolate of the cyanobacterium Synechococcus elongatus [PDF]

Proceedings of the National Academy of Sciences, 2018
Many cyanobacteria, which use light as an energy source via photosynthesis, have evolved the ability to guide their movement toward or away from a light source. This process, termed “phototaxis,” enables organisms to localize in optimal light environments for improved growth and fitness.
Yiling Yang, Vinson Lam, Marie Adomako, Ryan Simkovsky, Annik Jakob, Nathan C. Rockwell, Susan E. Cohen, Arnaud Taton, Jingtong Wang, J. Clark Lagarias, Annegret Wilde, David R. Nobles, Jerry J. Brand, Susan S. Golden   +13 more
openaire   +5 more sources

Fecal Microbiome Alterations in Colorectal Cancer: A Systematic Review of Compositional Changes and Microbial Biomarkers

MicrobiologyOpen, Volume 15, Issue 3, June 2026.
Gut microbiome plays a crucial role in colorectal cancer development. The advanced sequencing techniques have the potential to complement current non‐invasive methods for early diagnosis and prevention of colorectal cancer. This includes conducting studies with robust statistical power and consistent, replicable methodologies, taking into consideration
Parvin Askari, Shirin Dashtbin, Tahereh Navidifar, Leila Dadgar‐Zankbar, Arezoo Asadi, Mahsa Ghamari, Parisa Najafi, Shabnam Zeighamy Alamdary, Roghayeh Afifirad, Roya Ghanavati, Atieh Darbandi   +10 more
wiley   +1 more source

Reversible Regime Change: Climate‐Driven Phytoplankton Community Shifts in the Cariaco Basin, Venezuela

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 6, June 2026.
Abstract Phytoplankton communities are integral to oceanic biogeochemical cycles and are sensitive indicators of climate‐driven environmental variability. Long‐term time series capture this variability, allowing us to unravel the effects of environmental change on local communities.
Benjamin Post, Esteban Acevedo‐Trejos, Subhendu Chakraborty, Andrew D. Barton, Agostino Merico   +4 more
wiley   +1 more source