Related Experiment Video
Updated: Jul 18, 2026
11:47
Natural Transformation, Protein Expression, and Cryoconservation of the Filamentous Cyanobacterium Phormidium lacuna
Published on: February 1, 2022
Marine cyanophages and light.
Martha R J Clokie1, Nicholas H Mann
1Department of Biological Sciences, University of Warwick, Coventry CV4 7AL, UK.
Environmental Microbiology
|November 17, 2006
Summary
Marine viruses infecting cyanobacteria utilize light for critical life cycle stages, including host interaction and survival. Genomic analysis reveals these viruses have acquired photosynthetic genes, highlighting novel host-parasite dynamics.
Area of Science:
- Marine microbiology
- Virology
- Photosynthesis research
Background:
- Phages infecting marine cyanobacteria have unique light-dependent life cycles.
- Cyanobacteria genera Synechococcus and Prochlorococcus are ecologically vital marine microbes.
Purpose of the Study:
- To investigate the role of light in the life cycle of marine cyanophages.
- To explore the evolutionary acquisition of photosynthetic genes by these viruses.
Main Methods:
- Analysis of cyanophage genomes.
- Investigating light-dependent components in phage adsorption, replication, and survival.
Main Results:
- Light influences multiple stages of the cyanophage life cycle.
- Cyanophage genomes contain genes for light-harvesting apparatus components.
- Evidence of horizontal gene transfer of photosynthetic genes.
Conclusions:
- Light is a critical environmental factor shaping marine phage-host interactions.
- Cyanophages have evolved novel strategies by integrating host photosynthetic machinery.
- Understanding these interactions is key to marine microbial ecology.
Related Concept Videos
01:30Bacterial Phylum Cyanobacteria
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 multiple fission),...
01:30Marine Microbial Ecology
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...
01:11Channel Rhodopsins
Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
01:25Microbial Mats
Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
01:28Anoxygenic Phototrophic Bacteria
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...
01:30Anoxygenic Photosynthesis
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green sulfur bacteria, heliobacteria, and...