Article
Microbiology
Karel Kopejtka, Yonghui Zeng, David Kaftan, Vadim Selyanin, Zdenko Gardian, Juergen Tomasch, Ruben Sommaruga, Michal Koblizek
Summary: Strain AAP5 is an aerobic bacterium producing bacteriochlorophyll a, belonging to the genus Sphingomonas with a close phylogenetic relationship to Sphingomonas glacialis. It has a genomic DNA G + C content of 65.9% and shared 76.2% orthologous gene clusters with Sphingomonas paucimobilis, supporting their classification into the same genus.
Article
Ecology
Haijian Yang, Chunxiang Hu
Summary: This study conducted high-throughput sequencing of photosynthetic microorganisms in soil crusts at different elevations on the Tibetan Plateau, revealing a single-peak pattern of microbial diversity with elevation and the impact of soil salts and nutrients on the community structure. Rhizobiales showed significant negative correlation with salt ions, while Rhodobacterales exhibited strong positive associations with Cl-. Chlorophyceae and Bacillariophyceae were positively correlated with CO32-.
Article
Microbiology
Yu-Qi Ye, Ji-Ru Han, Jin-Xin Zhao, Meng-Qi Ye, Zong-Jun Du
Summary: In this study, a novel aerobic anoxygenic photosynthetic bacterium, named Pseudotabrizicola formosa sp. nov., was isolated from Sayram Lake in Xinjiang Province, China. The bacterium was found to grow optimally at 33 degrees C, pH 7.5 with 1.0% (w/v) NaCl, and to produce bacteriochlorophyll a and carotenoids. Comparative genomic analysis showed that the bacterium possessed a complete anoxygenic photosystem II.
Article
Soil Science
Zhiwei Liu, Xiuxia Liu, Xiulan Wu, Rongjun Bian, Xiaoyu Liu, Jufeng Zheng, Xuhui Zhang, Kun Cheng, Lianqing Li, Genxing Pan
Summary: Soil microbial necromass plays a critical role in soil organic carbon (SOC) sequestration, with elevated CO2 increasing fungal-derived C and warming increasing bacterial-derived C in SOC. The combination of elevated CO2 and warming resulted in the highest total microbial necromass and SOC accumulation, with root biomass indirectly affecting total amino sugar concentration through increased microbial biomass. Further research involving multiple sampling times is needed to understand the temporal dynamics of these properties.
BIOLOGY AND FERTILITY OF SOILS
(2021)
Article
Microbiology
John A. Kyndt, Sydney Robertson, Isabella B. Shoffstall, Robert F. Ramaley, Terrance E. Meyer
Summary: This study reports the genome sequence and characteristics of a novel Rhodobacter species, strain M37P, isolated from Mushroom hot spring runoff in Yellowstone National Park. The strain is identified as an aerobic anoxygenic phototroph with a unique pinkish-red pigmentation. Genome-based analysis reveals that M37P belongs to a specific clade of Rhodobacter species that are genetically and physiologically distinct from others.
Article
Soil Science
Muhammad Ahmed Waqas, Yu 'e Li, Muhammad Nadeem Ashraf, Waqas Ahmed, Bin Wang, Muhammad Fahad Sardar, Ping Ma, Runan Li, Yunfan Wan, Yakov Kuzyakov
Summary: This study investigated the effects of climate warming and elevated CO2 levels on the community structure and population size of nitrifying bacteria. Results showed that increased CO2 and temperature enhanced the abundance of AOB and the nitrification rate, while AOA were less sensitive to these climate change factors. The nitrifying bacterial community exhibited remarkable resilience to the individual and interactive impacts of warming and elevated CO2.
APPLIED SOIL ECOLOGY
(2021)
Review
Agricultural Engineering
J. Fradinho, L. D. Allegue, M. Ventura, J. A. Melero, M. A. M. Reis, D. Puyol
Summary: The article introduces the potential of purple phototrophic bacteria as versatile organisms in waste management and polymer production. They adapt to various environments using unique metabolism, with internal polymers used for energy balance and reserves.
BIORESOURCE TECHNOLOGY
(2021)
Article
Soil Science
Xin Liu, Li-dong Shen, Wang-ting Yang, Mao-hui Tian, Jing-hao Jin, Yu-ling Yang, Jia-qi Liu, Zheng-hua Hu, Hong-sheng Wu
Summary: The study revealed that in paddy fields, the activity, abundance, and community composition of methanotrophs are significantly affected by elevated atmospheric CO2 concentration, leading to changes in methane oxidation potential and community structure in response to rising CO2 levels.
APPLIED SOIL ECOLOGY
(2022)
Article
Microbiology
Mohit Kumar Saini, Shohei Yoshida, Aswathy Sebastian, Eri Hara, Hideyuki Tamaki, Nathan T. Soulier, Istvan Albert, Satoshi Hanada, Marcus Tank, Donald A. Bryant
Summary: A new microbial strain, named Elioraea tepida, was isolated from an alkaline siliceous hot spring in Yellowstone National Park, USA. The strain grows chemoheterotrophically by oxygen-dependent respiration and can also undergo photoheterotrophic growth under strictly oxic conditions. It does not exhibit photoautotrophic growth under oxic or anoxic conditions, indicating that it belongs to an aerobic anoxygenic phototrophic bacterium.
Review
Biochemistry & Molecular Biology
Ivan Kushkevych, Jiri Prochazka, Mario Gajdacs, Simon K. -M. R. Rittmann, Monika Vitezova
Summary: This paper discusses the two main types of bacterial photosynthesis: oxygenic and anoxygenic, focusing on the molecular mechanisms and physiological processes of purple and green sulfur bacteria. It also explores the molecular biotechnological perspectives of these phototrophic microorganisms.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Microbiology
Izabela Mujakic, Adrian- Stefan Andrei, Tanja Shabarova, Livia Kolesar Fecskeova, Michaela M. Salcher, Kasia Piwosz, Rohit Ghai, Michal Koblizek
Summary: Gemmatimonadota bacteria are widely distributed in natural environments, including soil and water bodies. Analysis of metagenomes from five freshwater lakes in central Europe revealed diverse Gemmatimonadota populations, some of which are closely associated with phytoplankton and possess unique mitochondrial assembly genes.
Article
Engineering, Environmental
Xiong Yang, Dongming Wang, Ye Tao, Min Shen, Wei Wei, Chuang Cai, Changfeng Ding, Jiuyu Li, Lian Song, Bin Yin, Chunwu Zhu
Summary: This study investigates the effects and mechanisms of elevated CO2 concentration on cadmium (Cd) uptake by rice in a 3-year experiment. The results show that increased CO2 concentration leads to higher levels of dissolved Fe2+ in soil, resulting in more low-crystalline Fe oxides being deposited on the root surface. This inhibits the uptake of Cd by rice.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Gabriel Capson-Tojo, Shengli Lin, Damien J. Batstone, Tim Hulsen
Summary: This study evaluated the impact of different dissolved oxygen concentrations on the performance of enriched purple phototrophic bacteria (PPB) cultures in treating wastewater. The results showed that the presence of oxygen suppressed photoheterotrophic growth of PPB and led to dominant chemoheterotrophy under aerobic conditions. This suggests that PPB cannot outcompete other microbes under aerobic or microaerobic conditions, despite their aerobic capabilities.
Article
Microbiology
Francesco Di Nezio, Clarisse Beney, Samuele Roman, Francesco Danza, Antoine Buetti-Dinh, Mauro Tonolla, Nicola Storelli
Summary: Meromictic lakes provide a stable anoxic environment for anaerobic microorganisms, with Lake Cadagno being a habitat for phototrophic sulfur bacteria contributing significantly to the lake's total productivity. Different populations of these bacteria display varying abilities in CO2 fixation through photosynthesis and chemosynthesis, showing substantial differences in activity and abundance.
FEMS MICROBIOLOGY ECOLOGY
(2021)
Article
Limnology
Limei Shi, Yuanfeng Cai, Xiaoli Shi, Min Zhang, Qingfei Zeng, Fanxiang Kong, Ping Xu
Summary: This study compared the abundance and diversity dynamics of AAPB in Meiliang Bay and East Bay of Taihu Lake. The results showed that there was no significant difference in AAPB abundance between the two sites, and it was positively correlated with dissolved organic carbon concentration. There were no significant differences in the composition of AAPB communities between the two sites, but there was a separation between warm and cold seasons. Chlorophyll a and dissolved organic carbon were the most significant variables influencing the AAPB community structure.
JOURNAL OF OCEANOLOGY AND LIMNOLOGY
(2022)