Article
Environmental Sciences
Vigya Kesari, Sanjay Kumar, Indrajeet Yadav, Antra Chatterjee, Shweta Rai, Shraddha Pandey
Summary: The study reveals that Ganga River water quality is influenced by contaminants such as coliform bacteria, COD, NO3-N, and phosphate, favoring the growth of microcystins-producing cyanobacteria. The presence of microcystins producers can serve as a new emerging parameter for monitoring water quality index and restoration strategies for the Ganga River.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Weijun Song, Weixuan Wang, Donghua Qiu, Wenzhen Zheng, Xi Li
Summary: This study assessed the microcystin risk of a toxic bloom using biochemical and molecular techniques. The results showed that ELISA and HPLC can accurately quantify microcystin concentrations and assess the risk. However, direct ELISA underestimated the risk at the development stage, and the reliability of DNA-based qPCR was affected by biomass. RNA-based qPCR could be a promising tool for early-warning and real-time assessments of microcystin risk.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Pei Cai, Lei Xu, Jiaojiao Yang, Cuicui Tian, Xingqiang Wu, Chunbo Wang, Bangding Xiao
Summary: The survivability and toxic potential of Microcystis colonies in sediment are influenced by their colony morphology and size. Smaller colonies have higher survivability at low temperatures, while larger colonies are more susceptible to oxidative stress. The toxic potential of Microcystis colonies in sediment is related to their survivability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Qing Yang, Yongqiang Liu, Lihong Wang, Qing Zhou, Mengzhu Cheng, Jiahong Zhou, Xiaohua Huang
Summary: The study reveals that exposure to cerium in Lake Taihu water can enhance the production of microcystins (MCs) in Microcystis aeruginosa, aggravating the pollution of MCs by promoting endocytosis in the cells of M. aeruginosa.
ENVIRONMENTAL POLLUTION
(2022)
Article
Food Science & Technology
Malcolm A. Barnard, Justin D. Chaffin, Haley E. Plaas, Gregory L. Boyer, Bofan Wei, Steven W. Wilhelm, Karen L. Rossignol, Jeremy S. Braddy, George S. Bullerjahn, Thomas B. Bridgeman, Timothy W. Davis, Jin Wei, Minsheng Bu, Hans W. Paerl
Summary: The study found that biomass and toxin production in WLE CyanoHABs are co-limited by phosphorus and nitrogen, with reducing N and P playing a key role in inhibiting microcystin and toxin production.
Article
Food Science & Technology
Nur Hanisah Bte Sukarji, Yiliang He, Shu Harn Te, Karina Yew-Hoong Gin
Summary: A mechanistic model of microcystin production by Microcystis spp. was developed and used to predict its occurrence in laboratory and field conditions. The model takes into account nitrogen, phosphorus, temperature, and the proportion and decay rate of microcystin. The predictions of the model were generally accurate, but discrepancies were observed, possibly due to non-constitutive microcystin production and strain-specific differences in cell quota.
Article
Engineering, Environmental
Qinyi Chen, Zhicong Wang, Hui Wei, Jinglong Wang, Weicheng Zhou, Panpan Zhou, Dunhai Li
Summary: This study investigates the effects of the environmental concentration of anionic surfactants on the dominance of toxic Microcystis and toxin production. The results show that high concentrations of anionic surfactants selectively promote the photosynthetic competitive advantage of toxic Microcystis and induce the synthesis and release of microcystins. Toxic Microcystis can better resist the stress of anionic surfactants by dissipating excess light, maintaining membrane structure, and cellular homeostasis. The damage to non-toxic Microcystis's photosynthesis may be due to the impacts of anionic surfactants on nitrogen absorption and assimilation.
Article
Biology
Larry Wymer, Stephen Vesper, Ian Struewing, Joel Allen, Jingrang Lu
Summary: To ensure the safety of drinking water, it is important to understand the relationship between fungi and harmful cyanobacterial blooms (HCBs) and their toxins. This study found that the concentration of the fungus Cladosporium cladosporioides and the microcystin-gene transcript copy number of Microcystis aeruginosa appeared to be interrelated during each bloom season. The results also showed that there might be a balanced antagonism between the fungus and the cyanobacteria, with variations observed between different years.
Article
Marine & Freshwater Biology
Colleen E. Yancey, E. Anders Kiledal, Subba Rao Chaganti, Vincent J. Denef, Reagan M. Errera, Jacob T. Evans, Lauren N. Hart, Dragan Isailovic, William S. James, Jenan J. Kharbush, Jeffrey A. Kimbrel, Wei Li, Xavier Mayali, Helena Nitschky, Catherine A. Polik, McKenzie A. Powers, Sanduni H. Premathilaka, Nicole A. Rappuhn, Laura A. Reitz, Sara R. Rivera, Claire C. Zwiers, Gregory J. Dick
Summary: This study isolated and sequenced 21 dominant cyanobacterial strains from Lake Erie, revealing the genomic diversity of Microcystis strains and associated bacteria. The findings provide insights into the potential impacts of these strains on bloom development, toxin production, and toxin degradation.
Article
Environmental Sciences
Jieming Li, Yanran Chen, Qianruo Wan, Mingxia Zhang
Summary: This study investigated the effect of phosphorus level on the growth inhibition and toxin release of cyanobacteria by luteolin. It was found that higher phosphorus level weakened the algicidal and toxin removal effects of luteolin. Additionally, luteolin influenced the growth and toxin release of cyanobacteria by regulating gene expression.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Environmental Sciences
Xinyue Yu, Chen Huang, Liang Wu, Sijia Hua, Jing Ye, Liang Meng, Chao Xu
Summary: The study found that at high concentrations, QpE exhibited stronger toxicity and inhibition effects on Microcystis aeruginosa, with a more significant impact on the expression of photosynthesis-related genes. Furthermore, QpE and QE had different effects on oxidative stress, and could stimulate the synthesis and release of MC-LR in Microcystis aeruginosa.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Multidisciplinary Sciences
Young-Mi Lee, Hayoung Cho, Ryeo-Ok Kim, Soyeon In, Se-Joo Kim, Eun-Ji Won
Summary: Real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) is a primary method for evaluating gene expression, but the stability of reference genes in small invertebrates like Diaphanosoma celebensis under different ages and exposure conditions is limited. This study evaluated the expression profiles of nine candidate reference genes under diverse toxicant exposure and growth conditions, resulting in similar gene stabilities under chemical exposures but significantly different patterns based on age, impacting the expression of development and detoxification-related genes. This research is a crucial step towards standardized qRT-PCR analysis for ecotoxicology studies involving environmentally important invertebrates like D. celebensis.
SCIENTIFIC REPORTS
(2021)
Article
Food Science & Technology
Viktor A. Gabyshev, Sergey I. Sidelev, Ekaterina N. Chernova, Anna A. Vilnet, Denis A. Davydov, Sophia Barinova, Olga I. Gabysheva, Zoya A. Zhakovskaya, Ivan V. Voronov
Summary: This study tested the hypothesis of year-round presence of toxigenic Microcystis and cyanotoxins in Lake Ytyk-Kyuyol. Three independent approaches were used: mass-spectrometry, molecular methods, and light microscopy. Microcystis flos-aquae and M. aeruginosa were the dominant species, and the presence of M. aeruginosa and microcystin biosynthesis genes were confirmed. Microcystin concentration was low, indicating the potential viability of overwintering colonies.
Article
Immunology
Xiaolin Jiang, Yong Jiang, Feng Ye
Summary: This study used real-time quantitative PCR to detect Mucorales and Aspergillus in formalin-fixed, paraffin-embedded samples. The combination of Mucorales RQ-PCR and Aspergillus RQ-PCR was recommended as a screening tool for detecting suspected mucormycosis and/or aspergillosis samples.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2023)
Article
Food Science & Technology
Fahim Bashir, Arif Bashir, Vishnu D. Rajput, Noureddine Bouaicha, Khalid M. Fazili, Samrat Adhikari, Yogesh Negi, Tatiana Minkina, Waleed Hassan Almalki, Bashir Ahmad Ganai
Summary: This study investigated cyanobacterial species at three different sampling sites in Dal Lake and found that the Microcystis sp. AE03 strain contained both mcyB and pks genes, while the Dolichospermum sp. AE02 strain only had the anaC gene, providing important insights into further research on cyanobacterial species and related toxins.
FRONTIERS IN SUSTAINABLE FOOD SYSTEMS
(2022)
Article
Engineering, Environmental
Oscar Omondi Donde, Stanley M. Makindi, Cuicui Tian, Yingying Tian, Pei Hong, Qijia Cai, Tiantian Yang, Chunbo Wang, Xingqiang Wu, Bangding Xiao
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Agricultural Engineering
Pei Hong, Xingqiang Wu, Yilin Shu, Chunbo Wang, Cuicui Tian, Hailong Wu, Bangding Xiao
BIORESOURCE TECHNOLOGY
(2020)
Article
Environmental Sciences
Huaming Wu, Tiantian Yang, Chunbo Wang, Cuicui Tian, Oscar Omondi Donde, Bangding Xiao, Xingqiang Wu
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Environmental Sciences
Yingying Tian, Oscar Omondi Donde, Cuicui Tian, Bing Feng, Xingqiang Wu, Bangding Xiao
Summary: The study investigated the performance of R. palustris Strain PUF1 under different NH4-N gradients, finding that high concentrations inhibited bacterial growth while lower concentrations allowed for recovery of pigment synthesis. A threshold of 1.0 g/L NH4-N was recommended for optimal biomass production and nutrient sequestration from cyanobacterial feedstock. Low NH4-N treatments also resulted in more diverse bacterial communities and excess NH4-N reduced phosphorus sequestration by PUF1s.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2021)
Article
Environmental Sciences
Xingqiang Wu, Yehudit Viner-Mozzini, Yunlu Jia, Lirong Song, Assaf Sukenik
Summary: Alkyl-trimethylammonium (ATMA) surfactants, such as octadecyltrimethylammonium (ODTMA) bromide, act as cyanocides that efficiently inhibit cyanobacteria growth, with green algae being less affected by these compounds.
Article
Environmental Sciences
Chunbo Wang, Qijia Cai, Yang Li, Cuicui Tian, Xingqiang Wu, Yuhong Huang, Bangding Xiao
Summary: The mechanical harvesting technology combining flocculation with a rotary drum filter effectively removed cyanobacterial blooms and improved water quality. The treatment significantly reduced chlorophyll-a and turbidity levels, as well as nutrient concentrations, making it a promising approach for eutrophic lakes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Huaming Wu, Xingqiang Wu, Tiantian Yang, Chunbo Wang, Cuicui Tian, Bangding Xiao, Andreas Lorke
Summary: This study investigated the interactions between light availability and algal growth dynamics in the formation of surface blooms. The findings showed that high cell concentrations of Microcystis promote the formation of surface scum, and the scum can persist throughout diel photoperiods. Additionally, the study revealed the positive feedback regulation of Microcystis surface scum formation and stability by self-shading.
Article
Limnology
Yang Liu, Youxin Chen, Haiyan Fang, Hanyang Lu, Xingqiang Wu, Gongliang Yu, Shin-ichi Nakano, Renhui Li
Summary: The study in China isolated and identified different Microcystis species, detected mcyB gene-containing strains, and found significant differences between two groups of MC-producing Microcystis. Some strains in one group did not contain MC-RR. Compared with other regions, the proportion of Chinese MC-producing Microcystis differed, with M. aeruginosa being the most likely morphotype worldwide.
JOURNAL OF OCEANOLOGY AND LIMNOLOGY
(2021)
Article
Environmental Sciences
Shenghe Cai, Huaming Wu, Pei Hong, Oscar Omondi Donde, Chunbo Wang, Tao Fang, Bangding Xiao, Xingqiang Wu
Summary: The bioflocculation technique has been shown to be a cost-effective and environmentally friendly method for harvesting microalgae, but its potential for controlling cyanobacterial blooms in eutrophic lakes has been under-studied. This study compared the bioflocculation efficiencies of different Microcystis species under chironomid stress conditions and found that Glyptotendipes tokunagai had better efficiency on M. wesenbergii than on M. aeruginosa. The research also highlighted the role of extracellular polymeric substances and silk in promoting the formation of large algal aggregates, providing new insights for combating Microcystis blooms.
Article
Engineering, Environmental
Qijia Cai, Kezheng Song, Cuicui Tian, Xingqiang Wu, Yang Li, Yuhong Huang, Chunbo Wang, Bangding Xiao
Summary: The study investigated the effect of extracellular organic matter (EOM) on the removal of Microcystis using flocculation with cationic polyacrylamide (CPAM) and filtration with 100-mu m filter. It found that the removal efficiency increased with the growth of Microcystis, attributed to the accumulated EOM. Additionally, the study revealed that the proportion of protein and polysaccharide in the EOM positively correlated with removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Agricultural Engineering
Pei Hong, Keyin Yang, Yilin Shu, Bangding Xiao, Hailong Wu, Yunyun Xie, Yali Gu, Fangping Qian, Xingqiang Wu
Summary: By studying three aerobic denitrifiers with dual-capacities of strong auto-aggregation and high nitrogen removal efficiency, efficient nitrogen-rich wastewater treatment in a sequencing batch biofilm reactor was achieved. The coaggregation strains successfully colonized in the bioreactor and demonstrated a strong tolerance to high nitrogen concentrations, contributing to efficient inorganic nitrogen removal and biofilm formation.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Shenghe Cai, Yunlu Jia, Oscar Omondi Donde, Zhi Wang, Junqian Zhang, Tao Fang, Bangding Xiao, Xingqiang Wu
Summary: The study revealed that Microcystis has significant negative effects on the emergence and burrowing activity of Chironomus larvae, as well as their locomotion ability and growth. Temperature and different Microcystis diets have a major impact on Chironomus larvae, showing distinct effects on their life history traits.
ENVIRONMENTAL POLLUTION
(2021)
Article
Microbiology
Pei Cai, Qijia Cai, Feng He, Yuhong Huang, Cuicui Tian, Xingqiang Wu, Chunbo Wang, Bangding Xiao
Summary: Temperature plays a key role in driving the overwintering strategy of Microcystis, with lower temperatures leading to overwintering in sediments and higher temperatures allowing for overwintering in the water column. Warmer winter temperatures may result in pelagic Microcystis becoming the primary inoculum sources in the spring.
Article
Environmental Sciences
Shihao Gong, Oscar Omondi Donde, Qijia Cai, Xingqiang Wu, Kezheng Song, Chunbo Wang, Pei Hong, Bangding Xiao, Cuicui Tian
Summary: In this study, wood chips and bark were used as natural solid carbon sources to enhance the denitrification capacity of lakeshore sediment and remove excess nitrate in wastewater treatment plant tailwater. The results showed that wood chips were more effective in enhancing the denitrification ability of lakeshore sediment for a longer period of time. Wood chips also promoted microbial activity and nitrate and nitrite reductase enzyme activities, facilitating denitrification in the sediment.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2022)
Article
Environmental Sciences
Shenghe Cai, Yilin Shu, Cuicui Tian, Chunbo Wang, Tao Fang, Bangding Xiao, Xingqiang Wu
Summary: This study analyzed the physiological and ecological responses of Chironomus pallidivittatus to MC-LR exposure, revealing the harmful effects on the growth and development of chironomid larvae, damage to intestinal mitochondria, promotion of oxidative stress and detoxification responses, as well as alterations in intestinal microbiota.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)