Green Waste Compost Impacts Microbial Functions Related to Carbohydrate Use and Active Dispersal in Plant Pathogen-Infested Soil
Microb Ecol. 2024 Feb 17;87(1):44. doi: 10.1007/s00248-024-02361-8.ABSTRACTThe effects of compost on physical and chemical characteristics of soil are well-studied but impacts on soil microbiomes are poorly understood. This research tested effects of green waste compost on bacterial communities in soil infested with the plant pathogen Fusarium oxysporum. Compost was added to pathogen-infested soil and maintained in mesocosms in a greenhouse experiment and replicated growth chamber experiments. Bacteria and F. oxysporum abundance were quantified using quantitative PCR. Taxonomic and functional characteristics of bacterial c...
Source: Microbial Ecology - February 17, 2024 Category: Microbiology Authors: Nicholas R LeBlanc Fiona C Harrigian Source Type: research
Changes in Microbial Composition During the Succession of Biological Soil Crusts in Alpine Hulun Buir Sandy Land, China
Microb Ecol. 2024 Feb 16;87(1):43. doi: 10.1007/s00248-024-02359-2.ABSTRACTBiological soil crusts (biocrusts) are considered "desert ecosystem engineers" because they play a vital role in the restoration and stability maintenance of deserts, including those cold sandy land ecosystems at high latitudes, which are especially understudied. Microorganisms participate in the formation and succession of biocrusts, contributing to soil properties' improvement and the stability of soil aggregates, and thus vegetation development. Accordingly, understanding the composition and successional characteristics of microorganisms is a pre...
Source: Microbial Ecology - February 16, 2024 Category: Microbiology Authors: Yulong Duan Yuqiang Li Jianhua Zhao Junbiao Zhang Chun Luo Rongliang Jia Xinping Liu Source Type: research
Changes in Microbial Composition During the Succession of Biological Soil Crusts in Alpine Hulun Buir Sandy Land, China
Microb Ecol. 2024 Feb 16;87(1):43. doi: 10.1007/s00248-024-02359-2.ABSTRACTBiological soil crusts (biocrusts) are considered "desert ecosystem engineers" because they play a vital role in the restoration and stability maintenance of deserts, including those cold sandy land ecosystems at high latitudes, which are especially understudied. Microorganisms participate in the formation and succession of biocrusts, contributing to soil properties' improvement and the stability of soil aggregates, and thus vegetation development. Accordingly, understanding the composition and successional characteristics of microorganisms is a pre...
Source: Microbial Ecology - February 16, 2024 Category: Microbiology Authors: Yulong Duan Yuqiang Li Jianhua Zhao Junbiao Zhang Chun Luo Rongliang Jia Xinping Liu Source Type: research
Distinct Assembly Processes Structure Planktonic Bacterial Communities Among Near- and Offshore Ecosystems in the Yangtze River Estuary
This study further sheds new light on our understanding of the mechanisms governing bacterial communities in estuarine ecosystems.PMID:38356037 | DOI:10.1007/s00248-024-02350-x (Source: Microbial Ecology)
Source: Microbial Ecology - February 15, 2024 Category: Microbiology Authors: Wen-Dong Xian Junjie Ding Jinhui Chen Wu Qu Pinglin Cao Chunyu Tang Xuezhu Liu Yiying Zhang Jia-Ling Li Pandeng Wang Wen-Jun Li Jianxin Wang Source Type: research
Distinct Assembly Processes Structure Planktonic Bacterial Communities Among Near- and Offshore Ecosystems in the Yangtze River Estuary
This study further sheds new light on our understanding of the mechanisms governing bacterial communities in estuarine ecosystems.PMID:38356037 | DOI:10.1007/s00248-024-02350-x (Source: Microbial Ecology)
Source: Microbial Ecology - February 15, 2024 Category: Microbiology Authors: Wen-Dong Xian Junjie Ding Jinhui Chen Wu Qu Pinglin Cao Chunyu Tang Xuezhu Liu Yiying Zhang Jia-Ling Li Pandeng Wang Wen-Jun Li Jianxin Wang Source Type: research
The Photoprotective Behavior of a Motile Benthic Diatom as Elucidated from the Interplay Between Cell Motility and Physiological Responses to a Light Microgradient Using a Novel Experimental Setup
In this study, a novel experimental approach was developed and used to test the hypothesis of photosynthesis optimization through motility, based on the combination of single-cell in vivo chlorophyll fluorometry and microfluidic chips. The approach allows the concurrent study of behavior and photosynthetic activity of individual cells of the epipelic diatom species Craspedostauros britannicus exposed to a light microgradient of realistic dimensions, simulating the irradiance and distance scales of light microgradients in benthic sediments. Following exposure to light, (i) cells explored their light environment before initi...
Source: Microbial Ecology - February 14, 2024 Category: Microbiology Authors: J érôme Morelle Alexandra Bastos Silja Frankenbach J örg C Frommlet Douglas A Campbell Johann Lavaud Jo ão Serôdio Source Type: research
Revisiting the Multifaceted Roles of Bacteriocins : The Multifaceted Roles of Bacteriocins
Microb Ecol. 2024 Feb 14;87(1):41. doi: 10.1007/s00248-024-02357-4.ABSTRACTBacteriocins are gene-encoded antimicrobial peptides produced by bacteria. These peptides are heterogeneous in terms of structure, antimicrobial activities, biosynthetic clusters, and regulatory mechanisms. Bacteriocins are widespread in nature and may contribute to microbial diversity due to their capacity to target specific bacteria. Primarily studied as food preservatives and therapeutic agents, their function in natural settings is however less known. This review emphasizes the ecological significance of bacteriocins as multifunctional peptides ...
Source: Microbial Ecology - February 13, 2024 Category: Microbiology Authors: Sara Arbulu Morten Kjos Source Type: research
Dynamics of Antimicrobial Resistance Carriage in Koalas (Phascolarctos Cinereus) and Pteropid Bats (Pteropus Poliocephalus) Before, During and After Wildfires
This study investigated the dynamics of antimicrobial resistance (AMR) in pre-fire, fire-affected and post-fire koalas and Pteropid bat pups. PCR and DNA sequencing were used to screen DNA samples extracted from faeces (koalas and bats) and cloacal swabs (koalas) for class 1 integrons, a genetic determinant of AMR, and to identify integron-associated antibiotic resistance genes. Class 1 integrons were detected in 25.5% of koalas (68 of 267) and 59.4% of bats (92 of 155). Integrons contained genes conferring resistance to aminoglycosides, trimethoprim and beta-lactams. Samples were also screened for blaTEM (beta-lactam) res...
Source: Microbial Ecology - February 8, 2024 Category: Microbiology Authors: Fiona K McDougall Natasha Speight Oliver Funnell Wayne S J Boardman Michelle L Power Source Type: research
Temperature Adaptation of Aquatic Bacterial Community Growth Is Faster in Response to Rising than to Falling Temperature
Microb Ecol. 2024 Feb 1;87(1):38. doi: 10.1007/s00248-024-02353-8.ABSTRACTBacteria are key organisms in energy and nutrient cycles, and predicting the effects of temperature change on bacterial activity is important in assessing global change effects. A changing in situ temperature will affect the temperature adaptation of bacterial growth in lake water, both long term in response to global change, and short term in response to seasonal variations. The rate of adaptation may, however, depend on whether temperature is increasing or decreasing, since bacterial growth and turnover scale with temperature. Temperature adaptatio...
Source: Microbial Ecology - January 31, 2024 Category: Microbiology Authors: Erland B ååth Emma S Kritzberg Source Type: research
Analysis of diversity and function of epiphytic bacterial communities associated with macrophytes using a metagenomic approach
In this study, we employed a metagenomic approach to investigate the diversity and function of epiphytic bacterial communities associated with six submerged macrophytes: Ceratophyllum demersum, Hydrilla verticillata, Myriophyllum verticillatum, Potamogeton lucens, Stuckenia pectinata, and Najas marina. The results revealed that the predominant epiphytic bacterial species for each plant type included Pseudomonas spp., Microbacterium spp., and Stenotrophomonas rhizophila. Multiple comparisons and linear discriminant analysis effect size indicated a significant divergence in the community composition of epiphytic bacteria amo...
Source: Microbial Ecology - January 29, 2024 Category: Microbiology Authors: Xin Wang Yi Liu Chun Qing Jin Zeng Jixing Dong Pinhua Xia Source Type: research
Dynamic Changes of Soil Microbial Communities During the Afforestation of Pinus Armandii in a Karst Region of Southwest China
Microb Ecol. 2024 Jan 24;87(1):36. doi: 10.1007/s00248-024-02345-8.ABSTRACTClarifying the response of soil microbial communities to vegetation restoration is essential to comprehend biogeochemical processes and ensure the long-term viability of forest development. To assess the variations in soil microbial communities throughout the growth of Pinus armandii plantations in the karst region, we utilized the "space instead of time" approach and selected four P. armandii stands with ages ranging from 10 to 47 years, along with a grassland control. The microbial community structure was determined by conducting Illumina sequenci...
Source: Microbial Ecology - January 24, 2024 Category: Microbiology Authors: Bin He Qing Li Shun Zou Xiaolong Bai Wangjun Li Yang Chen Source Type: research
Effect of CO < sub > 2 < /sub > Concentrations on Entomopathogen Fitness and Insect-Pathogen Interactions
Microb Ecol. 2024 Jan 23;87(1):34. doi: 10.1007/s00248-024-02347-6.ABSTRACTNumerous insect species and their associated microbial pathogens are exposed to elevated CO2 concentrations in both artificial and natural environments. However, the impacts of elevated CO2 on the fitness of these pathogens and the susceptibility of insects to pathogen infections are not well understood. The yellow mealworm, Tenebrio molitor, is commonly produced for food and feed purposes in mass-rearing systems, which increases risk of pathogen infections. Additionally, entomopathogens are used to control T. molitor, which is also a pest of stored...
Source: Microbial Ecology - January 23, 2024 Category: Microbiology Authors: Pascal Herren Alison M Dunn Nicolai V Meyling Carlotta Savio Helen Hesketh Source Type: research
Diversity and ecological function of urease-producing bacteria in the cultivation environment of Gracilariopsis lemaneiformis
This study comprehensively analyzed the diversity of culturable UPB and explored their effects on urea uptake by G. lemaneiformis. A total of 34 isolates belonging to four main bacterial phyla i.e. (Proteobacteria, Bacteroidetes, Firmicutes, and Actinobacteria) were identified through 16S rRNA sequencing and were screened for UPB by urea agar chromogenic medium assay and ureC gene cloning. Our data revealed that only 8 strains contained urease. All of these UPB exhibited different urease activities, which were determined by the Berthelot reaction colorimetry assay. Additionally, the UPB strain (G13) isolated from G. lemane...
Source: Microbial Ecology - January 23, 2024 Category: Microbiology Authors: Pengbing Pei Muhammad Aslam Hui Wang Peilin Ye Tangcheng Li Honghao Liang Qi Lin Weizhou Chen Hong Du Source Type: research
Ciliate Grazing on the Bloom-Forming Microalga Gonyostomum semen
In this study, we describe a small ciliate species (< 17 μm) that preys on G. semen by damaging the cell membrane until cytoplasm and organelles spill out. Sequencing of clonal cultures of the ciliate tentatively identified it as the prostomatid species Urotricha pseudofurcata. Grazing experiments illustrated that feeding by U. cf. pseudofurcata can significantly reduce cell concentrations of the microalga. However, differences in cell size and growth rate between two investigated ciliate strains resulted in noticeably different grazing pressure. Environmental sequencing data from five different lakes supported potenti...
Source: Microbial Ecology - January 18, 2024 Category: Microbiology Authors: Ingrid Bergman Eva S Lindstr öm Ingrid Sassenhagen Source Type: research
Phosphate-Solubilizing Bacillus sp. Modulate Soil Exoenzyme Activities and Improve Wheat Growth
This study explored how plant-associated bacteria employ phosphate solubilizing mechanisms to improve P availability. The growth patterns of four bacterial strains, namely Bacillus subtilis ZE15 and ZR3, along with Bacillus megaterium ZE32 and ZR19, were examined in Pikovskaya's broth culture with and without the addition of insoluble phosphorus (P). In the absence of P amendment, most strains reached a stationary growth phase by the fourth day. However, their responses diverged when exposed to P-amended media. Particularly, ZE15 demonstrated the highest P solubilization capability, achieving up to 130 µg mL-1 solubilizat...
Source: Microbial Ecology - January 16, 2024 Category: Microbiology Authors: Zafar Iqbal Maqshoof Ahmad Muhammad Ali Raza Thomas Hilger Frank Rasche Source Type: research
