Article
Geochemistry & Geophysics
Miaomiao Zhang, Max Kolton, Max M. Haggblom, Xiaoxu Sun, Ke Yu, Bin He, Zaijian Yuan, Yiran Dong, Xianfa Su, Zhenyu Chen, Hui Li, Tangfu Xiao, Enzong Xiao, Weimin Sun
Summary: This study observed the coupling of anaerobic ammonium oxidation with As(V) reduction, known as Asammox, and identified the responsible bacteria in As-contaminated paddy soil. The discovery of Asammox expands the understanding of N and As biogeochemical cycling and provides a proof-of-concept for investigating anaerobic ammonium oxidation coupled with metal(loid)s reduction.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Environmental Sciences
Xinghua Luo, Xingxing Jiang, Shengguo Xue, Xianjin Tang, Chuhui Zhou, Chuan Wu, Ziyan Qian, Kaikai Wu
Summary: The study demonstrated that Fe oxidizing bacteria (FeOB) have the ability to enhance arsenic (As) immobilization and mineralization in soil, leading to a decrease in available As content. Additionally, Fe(II) facilitated the reduction of NO3- while inhibiting the reduction of NO2-. The addition of 2% or more bacteria significantly reduced aqueous As content and resulted in the formation of As-containing minerals (angelellite, loellingite).
LAND DEGRADATION & DEVELOPMENT
(2021)
Article
Environmental Sciences
Zhijun Wei, Mehmet Senbayram, Xu Zhao, Chenglin Li, Ke Jin, Min Wu, M. Mizanur Rahman, Jun Shan, Xiaoyuan Yan
Summary: Using biochar in paddy soil can enhance the rates of denitrification and dissimilatory nitrate reduction to ammonium (DNRA), as well as shift nitrate partitioning towards DNRA process. Biochar amendment also reduces N2O emissions by promoting N2O reduction. These effects are attributed to increased carbon availability and altered nitrate reducer communities.
Article
Environmental Sciences
Jessica Subirats, Hannah Sharpe, Edward Topp
Summary: Pathogenic spore-forming Firmicutes are commonly found in animal and human wastes used in crop production. Pre-treatment of organic waste can reduce the risk of contamination with pathogens in crops. Anaerobic digestion and aerobic composting can effectively reduce spore-forming Firmicutes, with temperature and moisture being key factors influencing the inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Ecology
Chunlei Huang, Helin Wang, Xinyan Shi, Yanhong Wang, Ping Li, Hanqin Yin, Yixian Shao
Summary: Se is an essential element for human health, and Se-enriched agricultural products can promote Se intake. Microorganisms play an important role in Se cycling. Two new bacterial strains isolated from paddy soil were able to reduce selenite using yeast extract as carbon source, promoting available Se in soil and Se content in rice plants. This study reports for the first time the Se reduction by Chitinophaga, providing a potential strategy for microbial fortification of Se in crops.
Article
Environmental Sciences
Zhao-Feng Yuan, Yu-Jie Zhou, Lina Zou, Zheng Chen, Williamson Gustave, Dechao Duan, Andreas Kappler, Xianjin Tang, Jianming Xu
Summary: Arsenic (As) is a priority environmental pollutant in paddy fields, and its release is affected by the coupling of arsenate (As(V)) reduction with anaerobic methane (CH4) oxidation. This study investigates the response of As(V)-dependent CH4 oxidation to pH shifts (pH 5.5-8.0) and identifies the methanotrophs responsible for this process. The results show that As(V)-dependent CH4 oxidation is highly sensitive to pH changes and can be dominated by different methanotrophs under different pH conditions, leading to enhanced As release in paddy soils.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Mi Feng, Yanhong Du, Xiaomin Li, Fangbai Li, Jiangtao Qiao, Gongning Chen, Yingmei Huang
Summary: This study investigated the universality and characteristics of nitrate reduction coupled with arsenic (As) oxidation in paddy soils. The results showed that nitrate effectively transformed toxic As(III) into less toxic and nonlabile As(V), and the addition of nitrate increased the abundance of 16S rRNA and As(III) oxidase genes in the soils. Metagenomic analysis also identified several putative novel nitrate-dependent As(III)-oxidizing bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Jun Wu, Jian Zhao, Hao Li, Lingzhan Miao, Jun Hou, Baoshan Xing
Summary: The study showed that Se(IV) acted as an oxidant to activate nZVI, thus improving the reactivity of nZVI towards Se(VI), which indicates a potential application of nZVI in the remediation of Se(IV) and Se(VI) containing water.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Xiayun Zang, Xingxiang Wang, Zhengfu Yue, Zhigao Zhou, Taolin Zhang, Changfeng Ding
Summary: This study investigated the effects of temperature on arsenic transformation and extractability in paddy soils. The results showed that higher temperatures facilitated the decrease in extractable arsenic and promoted arsenic(V) reduction. Soil properties significantly affected the aging and reduction processes of arsenic.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Lin Liu, Yu-Ping Yang, Gui-Lan Duan, Jun Wang, Xian-Jin Tang, Yong-Guan Zhu
Summary: The addition of citric acid was found to significantly enhance arsenic mobilization in contaminated paddy soils, while also inhibiting further transformation. Moreover, it enriched bacteria associated with arsenic and iron reduction processes.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Honghong Yuan, Qing Wan, Yue Huang, Zheng Chen, Xiaojia He, Williamson Gustave, Maria Manzoor, Xingmei Liu, Xianjin Tang, Lena Q. Ma, Jianming Xu
Summary: Increasing temperature favored the release of total As, arsenite (As(III)) and arsenate (As(V)) into soil pore-water, leading to higher As(III) accumulation in rice grains at warmer treatment. The study also found that Xanthomonadales order, Alcaligenaceae family, and arsC gene were enriched in rhizosphere soils at 33 degrees C, contributing to enhanced As(V) reductive dissolution into soil pore-water. Overall, the research provides insights on how warmer temperatures may exacerbate As accumulation in rice grains in the future.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Zhiliang Chen, Lihang An, Hang Wei, Jianqiang Zhang, Qi Zou, Mengqiang Sun, Ling Huang, Minchao Liu
Summary: The study found that the addition of nitrate can accelerate the reduction of soil Eh, inhibit dissimilatory iron reduction, and promote arsenic speciation transformation, making it an effective amendment for arsenic immobilization in paddy soils.
SURFACES AND INTERFACES
(2021)
Article
Multidisciplinary Sciences
Pedro Farias, Romeu Francisco, Paula Morais
Summary: This study characterized bacteria isolated from high metal-content mining residues that are able to resist/reduce tellurite and produce tellurium deposits. Most tellurite resistance genes were found in strains from Bacillales.
Article
Environmental Sciences
Guanjing Cai, Lixin Zhao, Tao Wang, Nan Lv, Junjie Li, Jing Ning, Xiaofang Pan, Gefu Zhu
Summary: In this study, bioaugmentation with sludge acclimated with VFAs significantly improved methane yield. The interaction between acidified and acclimated sludges had a great impact on VFA consumption and methane production. Additionally, microbial community succession played a crucial role in the efficiency of bioaugmentation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Food Science & Technology
S. W. Park, T. J. Cho, M. S. Rhee
Summary: This study suggests that spore-forming bacteria (SFB) in reconstituted infant formula (RIF) may produce nitrite, which poses an underestimated microbial risk. Some SFB strains can rapidly produce substantial amounts of nitrite. This could lead to infants consuming more than seven times the acceptable daily intake of nitrite.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Microbiology
Isabel Horna-Gray, Nora A. Lopez, Youngbeom Ahn, Brandon Saks, Nathaniel Girer, Ute Hentschel, Peter J. McCarthy, Lee J. Kerkhof, Max M. Haggblom
Summary: Desulfoluna spp. is a cosmopolitan group of dehalogenating bacteria distributed in sponges containing organohalides. The association between sponges and their associated microbiota is influenced by the organohalogen chemistry of the sponge. The production of organobromine secondary metabolites in sponges may serve as a chemical defense, and Desulfoluna spp. and related strains are responsible for dehalogenation in sponges.
FEMS MICROBIOLOGY ECOLOGY
(2022)
Article
Ecology
Xinzhu Yi, Jie-Liang Liang, Jian-Qiang Su, Pu Jia, Jing-li Lu, Jin Zheng, Zhang Wang, Shi-wei Feng, Zhen-hao Luo, Hong-xia Ai, Bin Liao, Wen-sheng Shu, Jin-tian Li, Yong-Guan Zhu
Summary: Mining activities have significant environmental impacts and can co-select for antibiotic resistance genes (ARGs) in microorganisms. However, ARGs in mining-impacted environments are poorly understood. In this study, a comprehensive investigation of ARGs in globally distributed mining sites was conducted. The results showed that the total abundance of ARGs in these sites was comparable to urban sewage but higher than freshwater sediments. Multidrug resistance genes accounted for a substantial portion of the total ARG abundance and tended to co-occur with multimetal resistance genes. Additionally, high-quality ARG-carrying genomes were identified, expanding the phylogenetic diversity of ARG hosts and revealing potential pathogens. These findings suggest that mining-impacted environments are important reservoirs of multidrug resistance genes.
Article
Environmental Sciences
Hu Li, Shu-Yi-Dan Zhou, Roy Neilson, Xin-Li An, Jian-Qiang Su
Summary: This study characterized the bacterial and fungal communities in a working office environment, finding significant differences in microbial communities from different sources. The composition of the communities was shaped by deterministic processes, with bacteria having a higher migration rate.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Environmental Sciences
Liyuan Hou, Jiangwei Li, Hongjie Wang, Qingfu Chen, Jian-Qiang Su, Mahmoud Gad, Warish Ahmed, Chang-Ping Yu, Anyi Hu
Summary: The study investigated the distribution and transport of antibiotic-resistance genes (ARGs) and resistant bacteria (ARB) in stormwater runoff. The results showed that ARGs and ARB were abundant in stormwater and their levels were highest one day after precipitation. The stormwater contributed to the ARG profiles through introducing ARGs, mobile genetic elements (MGEs), and ARB from both point and non-point sources. The study also found that the positive biological interactions between ARGs, MGEs, and bacteria were enhanced after the precipitation, indicating a promoted vertical and horizontal gene transfer for ARG dissemination. However, stormwater management practices were able to alleviate the spread of ARGs.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Environmental Sciences
Hu Li, Qiuping Luo, Sha Zhao, Peiqiang Zhao, Xiaoru Yang, Qiansheng Huang, Jianqiang Su
Summary: Microplastics serve as carriers for microorganisms and antibiotic resistance genes, contributing to the spread of pathogenic bacteria and antibiotic resistance genes in various environments. This study compared bacterial communities, interactions between bacterial taxa, pathogenic bacteria, and antibiotic resistance genes between the surface biofilm of microplastics and surrounding water. The results showed that urbanization had a significant impact on the patterns of potential pathogens and antibiotic resistance genes in the microplastic biofilms, with higher abundance of pathogenic bacteria and antibiotic resistance genes in urbanized areas. These findings highlight the importance of controlling the spread of antibiotic resistance genes among pathogens and the usage of plastic products in urban ecosystems.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Chenshuo Lin, Fu-Yi Huang, Shu-Yi-Dan Zhou, Hu Li, Xian Zhang, Jian-Qiang Su
Summary: This study developed a high-throughput library construction chip for profiling environmental microbial communities and evaluated its performance. The chip showed high conformity with conventional methods and demonstrated advantages in accuracy, high-throughput, cost-efficiency, and broad practicability. Additionally, the study found that bacteria tend to impose competitive pressures, resulting in a more connected network under certain conditions.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Huaqing Liu, Rui Xu, Max M. Haggblom, Jian Zhang, Xiaoxu Sun, Peng Gao, Jiayi Li, Wangwang Yan, Wenlong Gao, Pin Gao, Guoqiang Liu, Haihan Zhang, Weimin Sun
Summary: The use of immobile iron-rich particles (IIRP) can enhance arsenic retention and regulate its biotransformation in treatment wetlands (TWs). TWs with IIRP achieved a stable arsenic removal efficiency over a long period of time, while no removal or release of arsenic was observed in TWs without IIRP. IIRP provide additional adsorption sites and increase the stability of adsorbed arsenic.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jieyi Zeng, Yaying Li, Guoping Jin, Jian-Qiang Su, Huaiying Yao
Summary: Antibiotic resistance genes (ARGs) are global pollutants that pose a potential risk to human health. This study found that benzalkonium chloride (C-12) (BC) disinfectants can affect antibiotic resistance in soil, but the impact of sulfamethazine (SMZ) is limited.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Miaomiao Zhang, Max Kolton, Max M. Haggblom, Xiaoxu Sun, Ke Yu, Bin He, Zaijian Yuan, Yiran Dong, Xianfa Su, Zhenyu Chen, Hui Li, Tangfu Xiao, Enzong Xiao, Weimin Sun
Summary: This study observed the coupling of anaerobic ammonium oxidation with As(V) reduction, known as Asammox, and identified the responsible bacteria in As-contaminated paddy soil. The discovery of Asammox expands the understanding of N and As biogeochemical cycling and provides a proof-of-concept for investigating anaerobic ammonium oxidation coupled with metal(loid)s reduction.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Environmental Sciences
Emre Babur, Turgay Dindaroglu, Subhan Danish, Max M. Haggblom, Ekrem Ozlu, Gafur Gozukara, Omer Suha Uslu
Summary: This study used interpolation methods to investigate the impact of wildfire on soil organic carbon, microbial biomass carbon concentrations, and soil quality indices in a red pine forest. The results showed that wildfire increased soil carbon stocks, total nitrogen, pH, and qCO2, but decreased microbial biomass carbon and nitrogen.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Geng Yan, Xiaoxu Sun, Yiran Dong, Wenlong Gao, Pin Gao, Baoqin Li, Wangwang Yan, Haihan Zhang, Mohsen Soleimani, Bei Yan, Weimin Sun, Max M. Haggblom
Summary: This study identified microorganisms responsible for vanadate reduction in contaminated river sediments and predicted their metabolic mechanisms using DNA-stable isotope probing and metagenomic-binning analysis.
Article
Microbiology
Yongbin Li, Rui Yang, Max M. Haggblom, Mengyan Li, Lifang Guo, Baoqin Li, Max Kolton, Zhiguo Cao, Mohsen Solemani, Zheng Chen, Zhimin Xu, Wenlong Gao, Bei Yan, Weimin Sun
Summary: This study found that diazotrophic endophytes have the potential to promote the growth and colonization of pioneer plant Bidens pilosa in mine tailings, which can contribute to the phytoremediation of mine tailings.
Article
Environmental Sciences
Huiling Cui, Dong Zhu, Longjun Ding, Yifei Wang, Jianqiang Su, Guilan Duan, Yongguan Zhu
Summary: Paddy soils are potential hotspots for combined contamination with arsenic and antibiotics. This study investigated the dynamic response of As biotransformation genes (ABGs) and antibiotic resistance genes (ARGs) in paddy soils. The results showed that As stress increased the abundance of ARGs and mobile genetic elements (MGEs), posing a risk of antimicrobial resistance dissemination. Manure amendment increased the abundance of ABGs, enhancing As mobilization and methylation, and posing a risk to food safety.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Environmental Sciences
Xiaoting Fan, Jianqiang Su, Shuyidan Zhou, Xinli An, Hu Li
Summary: The global rise in antibiotic resistance among pathogenic microorganisms poses a significant threat to human health. Fresh vegetables have been identified as an important pathway for the transfer of antibiotic resistance genes (ARGs) from the environment to humans. This study found that plant cultivars significantly influence the abundance and composition of bacteria and mobile genetic elements (MGEs) in the phyllosphere. The relative abundance of potential bacterial pathogens was higher in the phyllosphere compared to soils. Furthermore, the patterns of ARGs were significantly correlated with the patterns of potential bacterial pathogens. These findings highlight the importance of controlling the risk of foodborne ARGs and suggest the need for more agricultural and hygiene protocols.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Plant Sciences
Timothy J. Waller, Max M. Haggblom, Peter V. Oudemans
Summary: Aqueous extracts from flowers have a stimulating effect on the germination, secondary conidiation, and appressorial formation of fruit rotting fungi. Even raindrops passing over flowers can accumulate sufficient activity to influence the infectivity of these fungi. Nonpolar components of the cuticle were found to have high levels of bioactivity. Specific fatty acids and fatty acid methyl esters were identified as bioactive components, stimulating appressorial formation and secondary conidiation. This study emphasizes the importance of the bloom period for infection and suggests that the presence of specific fatty acids may affect the host susceptibility.
