Related Experiment Video
Updated: May 2, 2026
11:45
Generation of Marked and Markerless Mutants in Model Cyanobacterial Species
Published on: May 29, 2016
11.8K
Lysogeny in marine Synechococcus
L McDaniel1, L A Houchin, S J Williamson
1University of South Florida, College of Marine Science, St Petersburg, Florida 33701, USA.
Nature
|February 2, 2002
Summary
Lysogeny, a viral infection cycle, occurs in marine Synechococcus bacteria and shows seasonal patterns. This process may explain how these microbes resist viral infections.
Area of Science:
- Microbiology
- Marine Biology
- Virology
Background:
- Bacteria are subject to viral infections, which can be lytic (cell-destroying) or lysogenic (genome integration).
- Lysogeny involves the viral genome becoming a prophage within the host bacterium.
- Understanding viral-bacterial interactions is crucial in microbial ecology.
Purpose of the Study:
- To investigate the occurrence and seasonal dynamics of lysogeny in natural populations of autotrophic picoplankton.
- To determine if lysogeny contributes to resistance against viral infection in Synechococcus.
Main Methods:
- Field sampling of marine picoplankton populations.
- Identification and characterization of lysogenic interactions using molecular techniques.
- Analysis of seasonal trends in lysogeny.
Main Results:
- Lysogeny was confirmed to occur in natural populations of Synechococcus.
- A distinct seasonal pattern was observed for lysogenic interactions.
- Lysogeny confers immunity to infection by related viruses.
Conclusions:
- Lysogeny is a significant viral interaction in marine Synechococcus populations.
- The seasonal occurrence of lysogeny may play a key role in microbial population dynamics.
- Lysogeny likely contributes to the observed resistance of Synechococcus to viral infection.
Related Concept Videos
01:17Gene Regulation During Sporulation
713
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
713
01:30Bacterial Phylum Cyanobacteria
956
Cyanobacteria are a diverse group of oxygenic, phototrophic bacteria that played a pivotal role in converting Earth’s atmosphere from anoxic to oxygen-rich billions of years ago. They exhibit remarkable morphological diversity, ranging from unicellular forms to filamentous types, with cell sizes varying between 0.5 μm and 100 μm. Cyanobacteria are classified into five groups: Chroococcales (unicellular, dividing by binary fission), Pleurocapsales (unicellular, dividing by...
956
01:28Anoxygenic Phototrophic Bacteria
1.3K
Anoxygenic phototrophic bacteria are a diverse group of microorganisms that perform photosynthesis without producing oxygen. They primarily include purple sulfur bacteria, purple nonsulfur bacteria, green sulfur bacteria, and green nonsulfur bacteria. These bacteria are classified into the Gammaproteobacteria, Alphaproteobacteria, Betaproteobacteria, Chlorobi, and Chloroflexi lineages, each with distinct physiological and ecological adaptations.Purple sulfur bacteria belong to the...
1.3K
01:16Viral Replication: Lysogenic Cycle
2.7K
The lysogenic cycle is a crucial viral replication strategy that allows bacteriophages to persist within host cells without immediately destroying them. This process is primarily observed in temperate phages, such as bacteriophage lambda (λ), which infects Escherichia coli. The cycle allows the viral genome to persist across bacterial generations while keeping host cells viable.Integration of the Viral GenomeUpon infection, bacteriophage lambda attaches to the bacterial surface and injects...
2.7K
01:30Marine Microbial Ecology
66
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
66
01:18Deep Sea Microbial Ecology
53
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches...
53