Topic
Synechococcus
About: Synechococcus is a research topic. Over the lifetime, 1687 publications have been published within this topic receiving 77479 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: The global niche models suggest that oceanic microbial communities will experience complex changes as a result of projected future climate conditions, and these changes may have large impacts on ocean ecosystems and biogeochemical cycles.
Abstract: The Cyanobacteria Prochlorococcus and Synechococcus account for a substantial fraction of marine primary production. Here, we present quantitative niche models for these lineages that assess present and future global abundances and distributions. These niche models are the result of neural network, nonparametric, and parametric analyses, and they rely on >35,000 discrete observations from all major ocean regions. The models assess cell abundance based on temperature and photosynthetically active radiation, but the individual responses to these environmental variables differ for each lineage. The models estimate global biogeographic patterns and seasonal variability of cell abundance, with maxima in the warm oligotrophic gyres of the Indian and the western Pacific Oceans and minima at higher latitudes. The annual mean global abundances of Prochlorococcus and Synechococcus are 2.9 ± 0.1 × 1027 and 7.0 ± 0.3 × 1026 cells, respectively. Using projections of sea surface temperature as a result of increased concentration of greenhouse gases at the end of the 21st century, our niche models projected increases in cell numbers of 29% and 14% for Prochlorococcus and Synechococcus, respectively. The changes are geographically uneven but include an increase in area. Thus, our global niche models suggest that oceanic microbial communities will experience complex changes as a result of projected future climate conditions. Because of the high abundances and contributions to primary production of Prochlorococcus and Synechococcus, these changes may have large impacts on ocean ecosystems and biogeochemical cycles.
1,274 citations
TL;DR: It is reported here the widespread occurrence of a small, marine, chroococcalean cyanobacterium belonging to the genus Synechococcus.
Abstract: IN marked contrast to their freshwater counterparts, marine planktonic cyanobacteria are restricted to a few nostocalean genera, of which only Trichodesmium is capable of forming extensive water blooms1–3. We report here the widespread occurrence of a small, marine, chroococcalean cyanobacterium belonging to the genus Synechococcus.
905 citations
TL;DR: This review puts the current knowledge of marine picocyanobacterial genomics into an environmental context and presents previously unpublished genomic information arising from extensive genomic comparisons in order to provide insights into the adaptations of these marine microbes to their environment and how they are reflected at the genomic level.
Abstract: Marine picocyanobacteria of the genera Prochlorococcus and Synechococcus numerically dominate the picophytoplankton of the world ocean, making a key contribution to global primary production. Prochlorococcus was isolated around 20 years ago and is probably the most abundant photosynthetic organism on Earth. The genus comprises specific ecotypes which are phylogenetically distinct and differ markedly in their photophysiology, allowing growth over a broad range of light and nutrient conditions within the 45 degrees N to 40 degrees S latitudinal belt that they occupy. Synechococcus and Prochlorococcus are closely related, together forming a discrete picophytoplankton clade, but are distinguishable by their possession of dissimilar light-harvesting apparatuses and differences in cell size and elemental composition. Synechococcus strains have a ubiquitous oceanic distribution compared to that of Prochlorococcus strains and are characterized by phylogenetically discrete lineages with a wide range of pigmentation. In this review, we put our current knowledge of marine picocyanobacterial genomics into an environmental context and present previously unpublished genomic information arising from extensive genomic comparisons in order to provide insights into the adaptations of these marine microbes to their environment and how they are reflected at the genomic level.
721 citations
TL;DR: In this paper, the carbon isotopic compositions of the marine diatom Porosira glacialis and the marine cyanobacterium Synechococcus sp. were measured over a series of growth rates (μ) in a continuous culture system in which the concentration and carbon isotope composition of CO2(aq) were determined.
703 citations
TL;DR: Study of the capa2 3 bilities of different Prochlorococcus and Synechococcus strains to grow on a variety of N sources found that all the isolates grew well on NH and all were capable of urea utilization, occasionally at a lower growth rate.
Abstract: Prochlorococcus is the most abundant phytoplankter throughout the photic zone in stratified marine waters and experiences distinct gradients of light and nitrogen nutrition. Physiologically and genetically distinct Prochlorococcus ecotypes partition the water column: high-B/A (low-light adapted) ecotypes are generally restricted to the deep euphotic zone near or at the nitracline. Low-B/A (high-light adapted) ecotypes predominate in, but are not limited to, NO -depleted surface waters, where they outnumber coexisting Synechococcus populations. The niche parti2 3 tioning by different Prochlorococcus ecotypes begs the question of whether they also differ in their nitrogen (N) utilization physiology, especially with respect to NO utilization. To explore this possibility, we studied the capa2 3 bilities of different Prochlorococcus and Synechococcus strains to grow on a variety of N sources. We found that all the isolates grew well on NH and all were capable of urea utilization, occasionally at a lower growth rate. 1 4 None of the Prochlorococcus isolates were able to grow with NO . Four high-B/A Prochlorococcus isolates grew 2 3 on NO , but all others did not. Whole genome analysis of the low-B/A Prochlorococcus MED4 revealed that the 2 2 genes required for NO uptake and reduction were absent. The genome of the high-B/A ProchlorococcusMIT 9313 2 3 also lacked the NO utilization genes but has homologs of genes required for NO utilization consistent with its
576 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 28 |
| 2024 | 40 |
| 2023 | 57 |
| 2022 | 114 |
| 2021 | 58 |
| 2020 | 56 |