Article
Microbiology
Elias Broman, Karin Holmfeldt, Stefano Bonaglia, Per O. J. Hall, Francisco J. A. Nascimento
Summary: Our study found different cyanophages in dead zone sediments compared to oxic sediments, suggesting that these viruses can impact cyanobacterial photosystem and phosphate regulation. Cyanobacterial blooms contribute to oxygen depletion in bottom waters, and viral lysis of cyanobacteria may increase the turnover of carbon, phosphorus, and nitrogen in these oxygen-free environments.
Review
Environmental Sciences
Yolanys Nadir Aranda, Pankaj Bhatt, Nuray Ates, Bernard A. Engel, Halis Simsek
Summary: Cyanobacteria are a type of bacteria that cause environmental problems worldwide and produce toxins that contaminate surface waters and drinking water reservoirs. Conventional treatment methods are ineffective in removing these toxins, requiring innovative and advanced treatment methods. This review paper aims to provide insight into using cyanophages as an effective form of biological control to address cyanobacterial problems in aquatic systems.
ENVIRONMENTAL RESEARCH
(2023)
Article
Multidisciplinary Sciences
Clara A. Fuchsman, David Garcia Prieto, Matthew D. Hays, Jacob A. Cram
Summary: This study analyzed the genomes of bacteria and viruses in ocean depths globally and found that environmental factors can lead to changes in the genetic composition of bacteria and viruses. The interaction between bacteria and viruses in different depths of the ocean is closely related to environmental factors.
Article
Fisheries
Rodrigo de Cassio da Silva, Rafael Rosas Oliveira, Sandra Maria Feliciano de Oliveira Azevedo, Raquel Moares Soares, Valeria Freitas De Magalhaes
Summary: The study evaluated the uptake and clearance of Cylindrospermopsin (CYN) in juvenile tilapia, finding higher levels of CYN in the viscera compared to muscle tissue. The toxin remained in the tissues even after 10 days without contaminated food, suggesting the potential for CYN transfer through the food web and the importance of continuous monitoring in organisms used for consumption by humans and animals.
JOURNAL OF FISH BIOLOGY
(2021)
Article
Engineering, Environmental
Zhe Lu, Jinmei Ye, Zhijiang Chen, Lijuan Xiao, Lamei Lei, Bo-ping Han, Hans W. Paerl
Summary: Nutrient storage is a critical strategy for algae to adapt to changing nutrient supply. This study found that cyanophycin storage supports persistent dominance and blooms of cyanobacteria in tropical waters, particularly during nitrogen-deficient seasons.
Article
Engineering, Environmental
Li Zhou, Xu Zhang, Min Cai, Naxin Cui, Guoyan Zou, Zhiyong Zhao
Summary: Modified TiO2/Ag3PO4 (T-P25/A) with oxygen vacancies was synthesized through tea polyphenol reduction and chemical deposition methods, effectively inhibiting the growth of harmful algae Cylindrospermopsis raciborskii under visible light. The creation of oxygen vacancies improved the photocatalytic performance of T-P25/A, leading to a 91.75% inactivation rate to Cylindrospermopsis raciborskii after 5 hours of visible light irradiation. The algal inactivation mechanism by T-P25/A was demonstrated through changes in morphological characteristics, cellular content degradation, oxidative species accumulation, and enzyme activity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Yuanyuan Hu, Xiaojia Huang, Xiaowei Cheng, Sicheng Li, Yulin Zou, Weibin Pan
Summary: Cylindrospermopsis raciborskii is an invasive species that poses a serious threat to drinking water sources and human health. Bacillus cereus strain L7 was found to have efficient algicidal activity against C. raciborskii FACHB-1503, with the highest activity observed during the decline phase of L7 culture. The coculture system showed optimal conditions at 30 degrees C, pH = 8, and a light-dark cycle.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Marine & Freshwater Biology
M. A. Burford, H. Franklin, S. J. Faggotter, A. Chuang, J. B. Hayton, A. R. Carroll
Summary: The concentration of coloured terrestrial dissolved organic matter (tDOM) from vegetation is increasing in lakes, leading to brownification. The phytotoxic effects of tDOM on cyanobacterial blooms are not well understood. This study found that tDOM leachate from Eucalyptus leaves inhibited the photosynthesis and growth of cyanobacteria, even at lower densities, and the effect was more significant at higher tDOM input loads.
Article
Environmental Sciences
Pankaj Bhatt, Bernard A. Engel, Mikael Reuhs, Halis Simsek
Summary: This study compiles information on the use of cyanophage therapy techniques for the removal of toxic cyanobacterial blooms, aiming to improve water quality. It examines cyanobacterial toxin production and its environmental impacts, the mechanisms involved in cyanophage-cyanobacteria interactions, and the application of cyanophages in removing toxic cyanobacterial blooms.
Review
Food Science & Technology
Christopher R. Grasso, Kaytee L. Pokrzywinski, Christopher Waechter, Taylor Rycroft, Yanyan Zhang, Alyssa Aligata, Michael Kramer, Anisha Lamsal
Summary: Harmful algal blooms (HABs), especially cyanobacteria HABs (cyanoHABs), have negative impacts on ecosystems and drinking water resources. Current methods for mitigating cyanoHABs are limited and have negative impacts on non-target species. Cyanophages, viruses specifically targeting cyanobacteria, have the potential to provide a specific control strategy with minimal impacts on non-target species. This paper provides a detailed review of cyanophage lifecycle, diversity, and factors influencing infectivity, and discusses the relationships between cyanophages and prominent cyanoHAB-forming genera. Factors affecting the potential application of cyanophages as a cyanoHAB control strategy are also discussed.
Article
Ecology
Aleksandra Jaskulska, Sigitas Sulcius, Mikolaj Kokocinski, Judita Koreiviene, Arnoldo Font Najera, Joanna Mankiewicz-Boczek
Summary: This study analyzed the diversity and distribution of cyanophages in 21 Polish and Lithuanian lakes, using marker genes psbA, nblA, and g91. The results showed that genetic markers representing cyanophages were observed in most lakes studied, with psbA being the most frequently detected gene. Principal component analysis identified significant variation between lakes with high and low cyanobacteria biomass. Lakes with high cyanobacteria biomass were further differentiated by country and the diversity of cyanobacteria species.
Article
Chemistry, Physical
Gulzhanay K. Kamshybayeva, Bekzhan D. Kossalbayev, Asemgul K. Sadvakasova, Meruyert O. Bauenova, Bolatkhan K. Zayadan, Ayshat M. Bozieva, Hesham F. Alharby, Tatsuya Tomo, Suleyman I. Allakhverdiev
Summary: There is a growing interest in biologically derived, inexhaustible energy sources based on solar energy, as there has been a tendency to postpone dealing with climate concerns. Cyanobacteria have the potential to produce clean, renewable fuels in the form of hydrogen gas. A recent study screened 11 cyanobacterial strains for efficient hydrogen production and found that the most active species was Anabaena variabilis BTA-1047, with an H2 production activity of 21.3 mmol mg-1 Chl a h-1. The study also questioned the idea that only an anaerobic environment is required for H2 production by cyanobacterial species.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Jielin Wei, Qian Li, Wei Liu, Shasha Zhang, Hangzhou Xu, Haiyan Pei
Summary: Based on monitoring data from Hongze Lake, China, from 2011 to 2020, it was found that rising water temperature, decrease in nitrate, and increase in water flow and turbidity were the main environmental characteristics. Additionally, the abundance of Chlorophyta, Bacillariophyta, and Cryptophyta significantly declined, while there was an increase in N2-fixing filamentous cyanobacteria and a decrease in non-filamentous cyanobacteria. These findings are crucial for the management of urbanized subtropical lakes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Marine & Freshwater Biology
Marcele Laux, Carlos Morais Piroupo, Joao Carlos Setubal, Alessandra Giani
Summary: Two Raphidiopsis raciborskii metagenome-assembled genomes were recovered from Pampulha Lake in Brazil, and the analysis revealed differences in the presence of saxitoxin gene cluster and genome size between the two genomes. The study also found geographic origin to be a factor affecting the conservation level of essential gene repertoire, indicating distinct evolutionary history based on geographical isolation.
Article
Limnology
Nicole D. Wagner, Felicia S. Osburn, Raegyn B. Taylor, Jeffrey A. Back, C. Kevin Chambliss, Bryan W. Brooks, J. Thad Scott
Summary: This study examined the interaction between nitrogen fixation and nitrogen-rich toxin synthesis in the cyanobacterium Aphanizomenon. The results showed that the biomass accumulation in low nitrogen-phosphorus cultures of Aphanizomenon was not affected, unlike other diazotrophic cyanobacteria. However, the production of cylindrospermopsin, a toxin, was lower in nitrogen-fixing populations compared to non-nitrogen-fixing populations. The findings suggest that different strategies in nitrogen fixation may determine bloom magnitude and toxin production patterns in nature.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
