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Tian K, Zhang J, Liu H, Wang R, Zhang Z. Mechanism of carbonized humic acid and magnesium aluminum-layered double hydroxide promoting biohydrogen generation. BIORESOURCE TECHNOLOGY 2024; 413:131563. [PMID: 39362343 DOI: 10.1016/j.biortech.2024.131563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2024] [Revised: 09/28/2024] [Accepted: 09/30/2024] [Indexed: 10/05/2024]
Abstract
Dark fermentation (DF) is prone to low hydrogen (H2) yield. In this work, magnesium aluminum-layered double hydroxide and carbonized humic acid (MgAl-LDH/CHA) was synthesized by co-precipitation to reveal the mechanism in rising bioH2 generation. The results indicated that MgAl-LDH released Mg and Al ions slowly in DF system, improving the activity of H2-producing microbes (HPM) for more H2. The H2 yield increased from 169.3 mL/g glucose to 244.9 mL/g glucose, which was 44.7 % higher than that for the control yield. MgAl-LDH/CHA increased Proteobacteria content from 30.9 % to 43.7 %, making it form a complex microbial community and participate in DF metabolism with Firmicutes and other microbes together. Besides, MgAl-LDH/CHA could serve as an electron shuttle that likely effectively promotes electron transfer in DF, significantly reduced the energy requirements of HPM, thus raising metabolic activity. It provides direction for the multi-element composite applied in DF system.
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Affiliation(s)
- Kexin Tian
- College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
| | - Jishi Zhang
- College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
| | - Hui Liu
- Shandong Institute of Geophysical &Geochemical Exploration, Jinan 250013, China.
| | - Ruixi Wang
- College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
| | - Zhengyi Zhang
- College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
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2
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Yang F, Wang W, Wu Z, Peng J, Xu H, Ge M, Lin S, Zeng Y, Sardans J, Wang C, Peñuelas J. Fertilizer reduction and biochar amendment promote soil mineral-associated organic carbon, bacterial activity, and enzyme activity in a jasmine garden in southeast China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 954:176300. [PMID: 39293769 DOI: 10.1016/j.scitotenv.2024.176300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Revised: 09/12/2024] [Accepted: 09/13/2024] [Indexed: 09/20/2024]
Abstract
Reducing chemical fertilizers and biochar amendment is essential for achieving carbon neutrality, addressing global warming, and promoting sustainable agricultural development. Biochar amendment, a carbon rich soil additive produced through biomass pyrolysis, enhances soil fertility, increases crop yield, and improves soil carbon storage. However, research on the combined effect of fertilizer reduction and biochar amendment on soil mineral associated organic carbon (MAOC) in jasmine gardens is limited. This study aims to determine if biochar can reduce industrial fertilizer usage without compromising soil quality. This study focuses on jasmine cultivation in southeastern China, employing four treatments: conventional fertilization (CK), biochar amendment without fertilizer (BA), fertilizer reduction (FR), and fertilizer reduction with biochar amendment (FRBA). The effects on MAOC, microbial abundance, and enzyme activity were investigated. The FRBA treatment significantly increased MAOC content by 19.98 % compared to CK (P < 0.05). The BA and FRBA treatments enhanced the diversity of soil bacteria, including Lactobacillus, Azospirillum, and Cutibacterium, which are associated with soil organic carbon sequestration and nutrient decomposition. The RandomForest model identified β-N-acetyl-glucosaminidase (NAG), electric conductivity (EC), β-1, 4-Glucosidase (BG), soil potential of Hydrogen (pH), soil bulk density (BD), and β-D-cellobiosidase (CBH) as key soil traits promoting MAOC accumulation (P < 0.05). The results indicate that BA and FRBA improve soil bacterial community structure, enzyme activity, and MAOC content, promoting soil carbon accumulation through environmental factors and dominant bacteria. This study encourages future fertilization protocols that enhance fertilizer efficiency and carbon storage in crop soils.
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Affiliation(s)
- Fajun Yang
- Key Laboratory of Humid Subtropical Eco-Geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Weiqi Wang
- Key Laboratory of Humid Subtropical Eco-Geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China.
| | - Ziwei Wu
- Key Laboratory of Humid Subtropical Eco-Geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Jiahao Peng
- Key Laboratory of Humid Subtropical Eco-Geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Hongda Xu
- Key Laboratory of Humid Subtropical Eco-Geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Maoquan Ge
- Key Laboratory of Humid Subtropical Eco-Geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Shaoying Lin
- Key Laboratory of Humid Subtropical Eco-Geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Yu Zeng
- Minrong Tea Co., Ltd, Fuzhou 350015, China
| | - Jordi Sardans
- CSIC, Global Ecology Unit CREAF-CSIC-UAB, 08913 Bellaterra, Catalonia, Spain; CREAF. 08913 Cerdanyola del Vallès, Catalonia, Spain.
| | - Chun Wang
- Key Laboratory of Humid Subtropical Eco-Geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350117, China
| | - Josep Peñuelas
- CSIC, Global Ecology Unit CREAF-CSIC-UAB, 08913 Bellaterra, Catalonia, Spain; CREAF. 08913 Cerdanyola del Vallès, Catalonia, Spain
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3
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Hu Y, Zhang X, Chen H, Jiang Y, Zhang J. Effects of forest age and season on soil microbial communities in Chinese fir plantations. Microbiol Spectr 2024; 12:e0407523. [PMID: 38980023 PMCID: PMC11302042 DOI: 10.1128/spectrum.04075-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 06/18/2024] [Indexed: 07/10/2024] Open
Abstract
Understanding changes in the distribution patterns and diversity of soil microbial communities from the perspectives of age-related changes, seasonal variations, and the interaction between the two factors can facilitate the management of plantations. In Chinese fir plantations, we collected soils from different depths in over-mature forests, mature forests, near-mature forests, middle-aged forests, and young forests in summer, autumn, and winter in China's subtropical regions. As the forests developed, bacterial and fungal communities' diversity changed, reached a minimum value at near-mature forests, and then increased in mature forests or over-mature forests. Near-mature forests had the lowest topological properties. The Shannon index of microbial communities varied with seasonal changes (P < 0.05). Bacterial and fungal community composition at genus level was more closely related to temperature indicators (including daily average temperature, daily maximum temperature, and daily minimum temperature) (P < 0.01, 0.5554 < R2 <0.8185) than daily average precipitation (P > 0.05, 0.0321 < R2 <0.6773). Bacteria were clustered by season and fungi were clustered by forest age. We suggested that extending the tree cultivation time of plantations could promote microbial community recovery. In addition, we found some species worthy of attention, including Bacteroidetes in autumn in over-mature forests, and Firmicutes in summer in young forests.IMPORTANCEChinese fir [Cunninghamia lanceolata (Lamb.) Hook] is an important fast-growing species with the largest artificial forest area in China, with the outstanding problems of low quality in soil. Soil microorganisms play a crucial role in soil fertility by decomposing organic matter, optimizing soil structure, and releasing essential nutrients for plant growth. In order to maintain healthy soil quality and prevent nutrient depletion and land degradation, it is crucial to understand the changes of soil microbial composition and diversity. Our study determined to reveal the change of soil microbial community from stand age, season, and the interaction between the two aspects, which is helpful to understand how interannual changes in different years and seasonal changes in one year affect soil fertility restoration and sustainable forest plantation management. It is a meaningful exploration of soil microbial communities and provides new information for further research.
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Affiliation(s)
- Yuxin Hu
- State Key Laboratory of Efficient Production of Forest Resources, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
- Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Xiongqing Zhang
- State Key Laboratory of Efficient Production of Forest Resources, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
- Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Hanyue Chen
- State Key Laboratory of Efficient Production of Forest Resources, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
| | - Yihang Jiang
- State Key Laboratory of Efficient Production of Forest Resources, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
| | - Jianguo Zhang
- State Key Laboratory of Efficient Production of Forest Resources, Key Laboratory of Tree Breeding and Cultivation of the National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China
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4
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Ucak S. Determination of Bacterial Community Structure of Table Olive via Metagenomic Approach in Şarköy. Chem Biodivers 2024; 21:e202302120. [PMID: 38613509 DOI: 10.1002/cbdv.202302120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 03/22/2024] [Accepted: 04/11/2024] [Indexed: 04/15/2024]
Abstract
One of the most popular pickled foods created worldwide is table olives. The aim was to identify the bacterial microbiota of table olive samples collected from Şarköy, Tekirdağ-Türkiye using next generation sequencing and 16S metagenomic analysis. Samples were studied as non-pre-enriched (n : 10) and after pre-enrichment (n : 10) to compare the effects of the enrichment process on the bacterial diversity. In non-pre-enriched, the most common genus found was Sphingomonas, followed by Altererythrobacter and Lysobacter. The most common phylum found was Proteobacteria, followed by Bacteroidota and Actinobacteria. In pre-enriched, Bacillus was the most commonly detected genus, followed by Pantoea and Staphylococcus. The most frequently found phylum was Firmicutes, followed by Proteobacteria and Cyanobacteria. This study is the first study for Şarköy, which is the only table olive production place in the Tekirdağ region due to its microclimate feature. Further studies are needed in more table olive samples from different geographical areas to confirm and develop current findings.
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Affiliation(s)
- Samet Ucak
- Department of Medical Biology and Genetics, Faculty of Medicine, Istanbul Aydın University, Istanbul, 34295, Türkiye
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5
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Xue C, Wang Y, He Z, Lu Z, Wu F, Wang Y, Zhen Y, Meng J, Shahzad K, Yang K, Wang M. Melatonin disturbed rumen microflora structure and metabolic pathways in vitro. Microbiol Spectr 2023; 11:e0032723. [PMID: 37929993 PMCID: PMC10714781 DOI: 10.1128/spectrum.00327-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 10/01/2023] [Indexed: 11/07/2023] Open
Abstract
IMPORTANCE In in vitro studies, it has been found that the effects of MLT on rumen microorganisms and metabolites can change the rumen flora structure, significantly inhibit the relative abundance of harmful Acinetobacter, and improve the relative abundance of beneficial bacteria. MLT may regulate the "arginine-glutathione" pathway, "phenylalanine, tyrosine and tryptophan biosynthesis-tryptophan generation" branch, "tryptophan-kynurenine" metabolism, and "tryptophan-tryptamine-serotonin" pathway through microorganisms.
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Affiliation(s)
- Chun Xue
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
- State Key Laboratory of Sheep Genetic Improvement and Healthy Production, Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, China
| | - Yifan Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Zhaoyuan He
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Zhiqi Lu
- Ningxia Dairy Science and Innovation Center of Guangming Animal Husbandry Co., Ltd., Zhongwei, China
| | - Feifan Wu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Yusu Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Yongkang Zhen
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Jimeng Meng
- State Key Laboratory of Sheep Genetic Improvement and Healthy Production, Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, China
| | - Khuram Shahzad
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Kailun Yang
- College of Animal Science, Xinjiang Agricultural University, Urumqi, China
| | - Mengzhi Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
- State Key Laboratory of Sheep Genetic Improvement and Healthy Production, Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi, China
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6
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Jing H, Wang H, Wang G, Liu G, Cheng Y. The mechanism effects of root exudate on microbial community of rhizosphere soil of tree, shrub, and grass in forest ecosystem under N deposition. ISME COMMUNICATIONS 2023; 3:120. [PMID: 37985715 PMCID: PMC10662252 DOI: 10.1038/s43705-023-00322-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 10/08/2023] [Accepted: 10/13/2023] [Indexed: 11/22/2023]
Abstract
Forests are composed of various plant species, and rhizosphere soil microbes are driven by root exudates. However, the interplay between root exudates, microbial communities in the rhizosphere soil of canopy trees, understory shrubs, grasses, and their responses to nitrogen (N) deposition remains unclear. Pinus tabulaeformis, Rosa xanthina, and Carex lancifolia were used to investigate root exudates, rhizosphere soil microbial communities, and their responses to N application in forest ecosystem. Root exudate abundances of P. tabulaeformis were significantly higher than that of R. xanthina and C. lancifolia, with carbohydrates dominating P. tabulaeformis and R. xanthina root exudates, fatty acids prevailing in C. lancifolia root exudates. Following N application, root exudate abundances of P. tabulaeformis and R. xanthina initially increased before decreasing, whereas those of C. lancifolia decreased. Microbial number of rhizosphere soil of C. lancifolia was higher than that of P. tabulaeformis and R. xanthina, but there was insignificant variation of rhizosphere soil microbial diversity among plant species. N application exerted promotional and inhibitory impacts on bacterial and fungal numbers, respectively, while bacterial and fungal diversities were increased by N application. Overall, N application had negative effects on root exudates of P. tabulaeformis, inhibiting rhizosphere soil microbial populations. N application suppressed rhizosphere soil microbial populations by increasing root exudates of R. xanthina. Conversely, N application elevated nutrient content in the rhizosphere soil of C. lancifolia, reducing root exudates and minimally promoting microbial populations. This study highlights the importance of understory vegetation in shaping soil microbial communities within forests under N deposition.
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Affiliation(s)
- Hang Jing
- School of Geography, Nanjing Normal University, 210023, Nanjing, China
| | - Huiling Wang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, 712100, Yangling, China
- Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, 712100, Yangling, China
| | - Guoliang Wang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, 712100, Yangling, China.
- Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, 712100, Yangling, China.
| | - Guobin Liu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, 712100, Yangling, China
- Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, 712100, Yangling, China
| | - Yi Cheng
- School of Geography, Nanjing Normal University, 210023, Nanjing, China
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7
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Verma K, Manisha M, Shivali NU, Santrupt RM, Anirudha TP, Ramesh N, Chanakya HN, Parama VRR, Mohan Kumar MS, Rao L. Investigating the effects of irrigation with indirectly recharged groundwater using recycled water on soil and crops in semi-arid areas. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 337:122516. [PMID: 37690469 DOI: 10.1016/j.envpol.2023.122516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/18/2023] [Accepted: 09/04/2023] [Indexed: 09/12/2023]
Abstract
The utilization of direct wastewater for irrigation poses many environmental problems such as soil quality deterioration due to the accumulation of salts, heavy metals, micro-pollutants, and health risks due to undesirable microorganisms. This hampers its agricultural reuse in arid and semi-arid regions. To address these concerns, the present study introduces a recent approach that involves using indirectly recharged groundwater (GW) with secondary treated municipal wastewater (STW) for irrigation through a Soil Aquifer Treatment-based system (SAT). This method aims to mitigate freshwater scarcity in semi-arid regions. The study assessed GW levels, physicochemical properties, and microbial diversity of GW, and soil in both impacted (receiving recycled water) and non-impacted (not receiving recycled water) areas, before recycling (2015-2018) and after recycling (2019-2022) period of the project. The results indicated a significant increase of 68-70% in GW levels of the studied boreholes in the impacted areas. Additionally, the quality of indirectly recharged GW in the impacted areas improved notably in terms of electrical conductivity (EC), hardness, total dissolved solids (TDS), sodium adsorption ratio (SAR), along with certain cations and anions (hard water to soft water). No significant difference was observed in soil properties and microbial diversity of the impacted areas, except for EC and SAR, which were reduced by 50% and 39%, respectively, after the project commenced. The study also monitored specific microbial species, including total coliforms, Escherichia coli (as indicator organisms), Shigella, and Klebsiella in some of the harvested crops (beetroot, tomato, and spinach). However, none of the analysed crops exhibited the presence of the studied microorganisms. Overall, the study concludes that indirectly recharged GW using STW is a better sustainable and safe irrigation alternative compared to direct wastewater use or extracted hard GW from deep aquifers.
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Affiliation(s)
- Kavita Verma
- Center for Sustainable Technologies, Indian Institute of Science, Bengaluru, India.
| | - Manjari Manisha
- Center for Sustainable Technologies, Indian Institute of Science, Bengaluru, India
| | - N U Shivali
- Center for Sustainable Technologies, Indian Institute of Science, Bengaluru, India
| | - R M Santrupt
- Center for Sustainable Technologies, Indian Institute of Science, Bengaluru, India
| | - T P Anirudha
- Center for Sustainable Technologies, Indian Institute of Science, Bengaluru, India
| | - N Ramesh
- Center for Sustainable Technologies, Indian Institute of Science, Bengaluru, India
| | - H N Chanakya
- Center for Sustainable Technologies, Indian Institute of Science, Bengaluru, India
| | - V R R Parama
- Department of Soil Science & Agricultural Chemistry, College of Agriculture, UAS, GKVK, Bengaluru, India
| | - M S Mohan Kumar
- Formerly @ Department of Civil Engineering, Indian Institute of Science, Bengaluru, India; Currently @ Gitam University, Bengaluru, India
| | - Lakshminarayana Rao
- Center for Sustainable Technologies, Indian Institute of Science, Bengaluru, India
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Yang Z, Lou Y, Yan X, Pan H, Wang H, Yang Q, Sun Y, Zhuge Y. The Microbiome and Antibiotic Resistome in Soil under Biodegradable Composite Carbon Source Amendment. J Xenobiot 2023; 13:424-438. [PMID: 37606424 PMCID: PMC10443276 DOI: 10.3390/jox13030027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/12/2023] [Accepted: 08/14/2023] [Indexed: 08/23/2023] Open
Abstract
The decomposition of biodegradable composite carbon sources generates a large amount of biodegradable microplastics, which may not only furnish microbial denitrification, but might also pose potential environmental risks. In the present study, the effects of different dosages of a biodegradable composite carbon source on the microbial communities, the nitrogen metabolic pathways and the antibiotic resistome were explored through Illumina MiSeq sequencing analysis and metagenomic analysis. The results of partial least-square discriminant analysis (PLS-DA) and analysis of similarity (ANOSIM) demonstrated that the response of the bacterial community to a biodegradable composite carbon source was more obvious than the fungal community. The application of biodegradable microplastics diminished the complexity of the microbial communities to some extent and obviously stimulated denitrification. Antibiotics resistance gene (ARG) dispersal was not evidently accelerated after the addition of biodegradable composite carbon source. Lysobacter, Methylobacillus, Phyllobacterium, Sinorhizobium, Sphingomonas from Proteobacteria and Actinomadura, Agromyces, Gaiella and Micromonospora from Actinobacteria were the major ARG hosts. Overall, the addition of a biodegradable composite carbon source shaped microbial communities and their antibiotic resistance profiles in this study.
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Affiliation(s)
| | | | | | | | | | | | | | - Yuping Zhuge
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Tai’an 271018, China; (Z.Y.); (Y.L.); (X.Y.); (H.P.); (H.W.); (Q.Y.); (Y.S.)
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9
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Sun R, Fu M, Ma L, Zhou Y, Li Q. Iron reduction in composting environment synergized with quinone redox cycling drives humification and free radical production from humic substances. BIORESOURCE TECHNOLOGY 2023:129341. [PMID: 37343801 DOI: 10.1016/j.biortech.2023.129341] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/23/2023]
Abstract
The aim of this paper was to investigate the influence of Fe (III) on humification and free radicals evolution. The experimental data showed that the experimental group (CT) with Fe2(SO4)3 had a better degree of humification than the control group (CK). The humic substances (HS) content was 10% higher in CT (23.94 mg·g-1) than in CK (21.54 mg·g-1) in the final. Fe (III) contributed significantly to the formation of free radicals in HS. The amount of H2O2 in CT increased to 74.8 mmol·kg-1, while CK was only 46.5 mmol·kg-1. The content of semiquinone free radical was 10.32×1011 spins/mm3 in CT, 5.11×1011 spins/mm3 in CK in the end. Several iron-reducing bacteria were detected in composting, among which Paenibacillus was dominant. The above findings suggested that the application of Fe2(SO4)3 enhanced the iron reduction synergistic quinone redox cycling and promoted the generation of free radicals during the humification of composting.
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Affiliation(s)
- Ru Sun
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Mengxin Fu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Liangcai Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Yucheng Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Qunliang Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
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10
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Satoh T. New prebiotics by ketone donation. Trends Endocrinol Metab 2023:S1043-2760(23)00091-7. [PMID: 37271711 DOI: 10.1016/j.tem.2023.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/29/2023] [Accepted: 05/05/2023] [Indexed: 06/06/2023]
Abstract
Integrity of the microbiome is an essential element for human gut health. 3-Hydroxybutyrate (3HB) secreted into the gut lumen has gained attention as a regulator of gut physiology, including stem cell expansion. In this opinion, I propose new prebiotics leading to gut health by use of a ketone (3HB) donor. When exogenous 3HB is supplied through ketone donation, it has the potential to markedly improve gut health by altering the gut microbiome and systemic metabolic status. Poly-hydroxybutyrate (PHB) donates 3HB and primarily influences microbiota, making it an effective prebiotic for improving the gut environment. Thus, exogenous 3HB donation to the lumen of the gut may aid gut health by maintaining the integrity of microbiome.
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Affiliation(s)
- Takumi Satoh
- Department of Antiaging Food Research, School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura, Hachioji 192-0982, Japan.
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11
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Jiang Z, Shen Y, Niu Z, Li X. Effects of cadmium and diethylhexyl phthalate on skin microbiota of Rana chinensis tadpoles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:64285-64299. [PMID: 37067706 DOI: 10.1007/s11356-023-26853-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 04/03/2023] [Indexed: 05/11/2023]
Abstract
Skin microbiotas play a crucial role in the health, homeostasis, and immune function of amphibians. The contaminants in water could affect the structure and composition of microbial communities. The effects of coexisting pollutants on frogs cannot be adequately explained by a single exposure due to the coexistence of Cd and DEHP in the environment. Following exposure to Cd and/or DEHP, we examined the histological characteristics of Rana chensinensis tadpoles. We also used the 16S rRNA gene sequencing technique to assess the relative abundance of skin microbial communities among tadpoles from each treatment group. Our findings indicate that R. chensinensis' skin experienced some degree of injury due to exposure to Cd and DEHP, which led to the imbalance of their skin microbial community homeostasis and thus interfered with the normal trial status of the host. That may eventually lead to the decline of the amphibian population.
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Affiliation(s)
- Zhaoyang Jiang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, People's Republic of China
| | - Yujia Shen
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, People's Republic of China
| | - Ziyi Niu
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, People's Republic of China
| | - Xinyi Li
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, Shaanxi, People's Republic of China.
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Ghouili E, Abid G, Hogue R, Jeanne T, D'Astous-Pagé J, Sassi K, Hidri Y, M'Hamed HC, Somenahally A, Xue Q, Jebara M, Nefissi Ouertani R, Riahi J, de Oliveira AC, Muhovski Y. Date Palm Waste Compost Application Increases Soil Microbial Community Diversity in a Cropping Barley ( Hordeum vulgare L.) Field. BIOLOGY 2023; 12:biology12040546. [PMID: 37106747 PMCID: PMC10135526 DOI: 10.3390/biology12040546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/29/2023] [Accepted: 04/01/2023] [Indexed: 04/29/2023]
Abstract
Application of date palm waste compost is quite beneficial in improving soil properties and crop growth. However, the effect of its application on soil microbial communities is less understood. High-throughput sequencing and quantitative real-time PCR (qPCR) were used to evaluate the effect of compost application on the soil microbial composition in a barley field during the tillering, booting and ripening stages. The results showed that compost treatment had the highest bacterial and fungal abundance, and its application significantly altered the richness (Chao1 index) and α-diversity (Shannon index) of fungal and bacterial communities. The dominant bacterial phyla found in the samples were Proteobacteria and Actinobacteria while the dominant fungal orders were Ascomycota and Mortierellomycota. Interestingly, compost enriched the relative abundance of beneficial microorganisms such as Chaetomium, Actinobacteriota, Talaromyces and Mortierella and reduced those of harmful microorganisms such as Alternaria, Aspergillus and Neocosmospora. Functional prediction based on Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) showed that amplicon sequence variant (ASV) sequences related to energy metabolism, amino acid metabolism and carbohydrate metabolism were associated with compost-treated soil. Based on Fungi Functional Guild (FUNGuild), identified fungi community metabolic functions such as wood saprotroph, pathotroph, symbiotroph and endophyte were associated with compost-treated soil. Overall, compost addition could be considered as a sustainable practice for establishing a healthy soil microbiome and subsequently improving the soil quality and barley crop production.
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Affiliation(s)
- Emna Ghouili
- Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, (L2AD, CBBC), Hammam-Lif 2050, PB 901, Tunisia
| | - Ghassen Abid
- Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, (L2AD, CBBC), Hammam-Lif 2050, PB 901, Tunisia
| | - Richard Hogue
- Microbial Ecology Laboratory, Research and Development Institute for the Agri-Environment (IRDA), Einstein Street 2700, Québec City, QC G1P 3W8, Canada
| | - Thomas Jeanne
- Microbial Ecology Laboratory, Research and Development Institute for the Agri-Environment (IRDA), Einstein Street 2700, Québec City, QC G1P 3W8, Canada
| | - Joël D'Astous-Pagé
- Microbial Ecology Laboratory, Research and Development Institute for the Agri-Environment (IRDA), Einstein Street 2700, Québec City, QC G1P 3W8, Canada
| | - Khaled Sassi
- Laboratory of Agronomy, National Agronomy Institute of Tunisia (INAT), University of Carthage, Avenue Charles Nicolle, Tunis-Mahrajène 1082, BP 43, Tunisia
| | - Yassine Hidri
- Olive Tree Institute, Laboratory of Integrated Olive Production in the Humid, Sub-humid and Semi-arid Region (LR16IO3), Cité Mahragène 1082, BP 208, Tunisia
| | - Hatem Cheikh M'Hamed
- Agronomy Laboratory, National Institute of Agronomic Research of Tunis (INRAT), University of Carthage, Hedi Karray Street, Ariana 2049, Tunisia
| | - Anil Somenahally
- Department of Soil and Crop Sciences, Texas A&M University, 370 Olsen Blvd., College Station, TX 77843-2474, USA
| | - Qingwu Xue
- Texas A&M AgriLife Research and Extension Center, Amarillo, TX 79106, USA
| | - Moez Jebara
- Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, (L2AD, CBBC), Hammam-Lif 2050, PB 901, Tunisia
| | - Rim Nefissi Ouertani
- Laboratory of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Hammam-Lif 2050, BP 901, Tunisia
| | - Jouhaina Riahi
- Technical Center for Organic Agriculture, Chott Mariem, Sousse 4042, BP 54, Tunisia
| | - Ana Caroline de Oliveira
- Biological Engineering Unit, Department of Life Sciences, Walloon Agricultural Research Centre, Chaussée de Charleroi, 5030 Gembloux, 234 BP, Belgium
| | - Yordan Muhovski
- Biological Engineering Unit, Department of Life Sciences, Walloon Agricultural Research Centre, Chaussée de Charleroi, 5030 Gembloux, 234 BP, Belgium
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Ren X, Whitton MM, Yu SJ, Trotter T, Bajagai YS, Stanley D. Application of Phytogenic Liquid Supplementation in Soil Microbiome Restoration in Queensland Pasture Dieback. Microorganisms 2023; 11:microorganisms11030561. [PMID: 36985135 PMCID: PMC10054416 DOI: 10.3390/microorganisms11030561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 02/20/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023] Open
Abstract
Pasture production is vital in cattle farming as it provides animals with food and nutrients. Australia, as a significant global beef producer, has been experiencing pasture dieback, a syndrome of deteriorating grassland that results in the loss of grass and the expansion of weeds. Despite two decades of research and many remediation attempts, there has yet to be a breakthrough in understanding the causes or mechanisms involved. Suggested causes of this phenomenon include soil and plant microbial pathogens, insect infestation, extreme heat stress, radiation, and others. Plants produce a range of phytomolecules with antifungal, antibacterial, antiviral, growth-promoting, and immunostimulant effects to protect themselves from a range of environmental stresses. These products are currently used more in human and veterinary health than in agronomy. In this study, we applied a phytogenic product containing citric acid, carvacrol, and cinnamaldehyde, to investigate its ability to alleviate pasture dieback. The phytogenic liquid-based solution was sprayed twice, one week apart, at 5.4 L per hectare. The soil microbial community was investigated longitudinally to determine long-term effects, and pasture productivity and plant morphometric improvements were explored. The phytogenic liquid significantly improved post-drought recovery of alpha diversity and altered temporal and spatial change in the community. The phytogenic liquid reduced biomarker genera associated with poor and polluted soils and significantly promoted plant and soil beneficial bacteria associated with plant rhizosphere and a range of soil benefits. Phytogenic liquid application produced plant morphology improvements and a consistent enhancement of pasture productivity extending beyond 18 months post-application. Our data show that phytogenic products used in the livestock market as an alternative to antibiotics may also have a beneficial role in agriculture, especially in the light of climate change-related soil maintenance and remediation.
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Jia S, Song C, Dong H, Yang X, Li X, Ji M, Chu J. Evaluation of efficacy and mechanism of Bacillus velezensis CB13 for controlling peanut stem rot caused by Sclerotium rolfsii. Front Microbiol 2023; 14:1111965. [PMID: 36876084 PMCID: PMC9978184 DOI: 10.3389/fmicb.2023.1111965] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 01/30/2023] [Indexed: 02/18/2023] Open
Abstract
Peanut stem rot, caused by Sclerotium rolfsii, considerably affects crop productivity. Application of chemical fungicides harms the environment and induces drug resistance. Biological agents are valid and eco-friendly alternatives to chemical fungicides. Bacillus spp. are important biocontrol agents that are now widely used against several plant diseases. This study aimed to evaluate the efficacy and mechanism of a potential biocontrol agent Bacillus sp. for controlling peanut stem rot caused by S. rolfsii. Here, we isolated a strain of Bacillus from pig biogas slurry that considerably inhibits the radial growth of S. rolfsii. The strain CB13 was identified as Bacillus velezensis on the basis of morphological, physiological, biochemical characteristics and phylogenetic trees based on the 16S rDNA and gyrA, gyrB, and rpoB gene sequences. The biocontrol efficacy of CB13 was evaluated on the basis of colonization ability, induction of defense enzyme activity, and soil microbial diversity. The control efficiencies of B. velezensis CB13-impregnated seeds in four pot experiments were 65.44, 73.33, 85.13, and 94.92%. Root colonization was confirmed through green fluorescent protein (GFP)-tagging experiments. The CB13-GFP strain was detected in peanut root and rhizosphere soil, at 104 and 108 CFU/g, respectively, after 50 days. Furthermore, B. velezensis CB13 enhanced the defense response against S. rolfsii infection by inducing defense enzyme activity. MiSeq sequencing revealed a shift in the rhizosphere bacterial and fungal communities in peanuts treated with B. velezensis CB13. Specifically, the treatment enhanced disease resistance by increasing the diversity of soil bacterial communities in peanut roots, increasing the abundance of beneficial communities, and promoting soil fertility. Additionally, real-time quantitative polymerase chain reaction results showed that B. velezensis CB13 stably colonized or increased the content of Bacillus spp. in the soil and effectively inhibited S. rolfsii proliferation in soil. These findings indicate that B. velezensis CB13 is a promising agent for the biocontrol of peanut stem rot.
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Affiliation(s)
- Shu Jia
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
- Sericultural Research Institute of Liaoning Province, Fengcheng, China
| | - Ce Song
- Sericultural Research Institute of Liaoning Province, Fengcheng, China
| | - Hai Dong
- Institute of Plant Protection, Liaoning Academy of Agricultural Sciences, Shenyang, China
| | - Xujie Yang
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Xinghai Li
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Mingshan Ji
- College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Jin Chu
- Institute of Plant Protection, Liaoning Academy of Agricultural Sciences, Shenyang, China
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15
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Liu D, Song X, Liu Y, Wang C. Effects of phosphorus application on soil phosphorus forms and phoD-harboring microbial communities in an alpine grassland on the Qinghai-Tibetan Plateau. Front Ecol Evol 2023. [DOI: 10.3389/fevo.2023.1131408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Phosphorus (P) application to terrestrial ecosystems affects not only aboveground plants but also soil P forms and phosphatase-associated microbes. The phoD gene is widespread in soil and plays an important role in P transformation. However, it is still unclear how phoD-harboring microbial communities respond to different P application rates, and the relationships between soil properties and phoD-harboring microbial community need to be better understood. In this study, the impacts of seven P application rates [0 (P0), 10 (P10), 20 (P20), 30 (P30), 40 (P40), 50 (P50), and 60 (P60) g⋅m–2⋅a–1] on the soil physicochemical properties, P forms, and phoD-harboring microbial communities were assessed. As the results, inorganic P (i.e., Resin-Pi, NaHCO3-Pi, NaOH-Pi, and HCl-Pi) and Bio-P increased firstly and then decreased with increasing P application rate, with the highest values in the P30 treatment. Soil phoD-harboring microbial community structures in low-P (P0∼P30) treatments were significantly different from that in high-P (P40∼P60) treatments. Soil phoD-harboring microbial Shannon and Simpson diversity increased firstly and then decreased with increasing P application rate, and there was a tipping point at the P application rate of 30 g⋅m–2⋅a–1. The Mantel test and structural equation modeling (SEM) revealed that Bio-P, TC (total carbon), Fe, NaOH-organic P (NaOH-Po), and soil pH were strongly related to the soil phoD-harboring microbial community structure. In conclusion, this study demonstrated that P application affected soil P forms and phoD-harboring microbes in an alpine grassland on the Qinghai-Tibetan Plateau, and there was a P application threshold for optimistic growth of phoD-harboring microbes in an alpine grassland on the Qinghai-Tibetan Plateau.
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16
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Han Q, Fu Y, Qiu R, Ning H, Liu H, Li C, Gao Y. Carbon Amendments Shape the Bacterial Community Structure in Salinized Farmland Soil. Microbiol Spectr 2023; 11:e0101222. [PMID: 36625648 PMCID: PMC9927309 DOI: 10.1128/spectrum.01012-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 12/15/2022] [Indexed: 01/11/2023] Open
Abstract
Practical, effective, and economically feasible salt reclamation and amelioration methods are in great demand in arid and semiarid areas. Energy amendments may be more appropriate than alternatives for improving salinized farmland soil because of their effects on soil microbes. We investigated the effects of biochar (Carbon) addition and desulfurization (noncarbon) on the soil bacterial community associated with Zea mays seedlings. Proteobacteria, Firmicutes, and Actinobacteriota were the dominant soil bacterial phyla. Biochar significantly increased soil bacterial biodiversity but desulfurization did not. The application of both amendments stimulated a soil bacterial community shift, and biochar amendments relieved selection pressure and increased the stochasticity of community assembly of bacterial communities. We concluded that biochar amendment can improve plant salt resistance by increasing the abundance of bacteria associated with photosynthetic processes and alter bacterial species involved in carbon cycle functions to reduce the toxicity of soil salinity to plants. IMPORTANCE Farmland application of soil amendments is a usual method to mitigate soil salinization. Most studies have concluded that soil properties can be improved by soil amendment, which indirectly affects the soil microbial community structures. In this study, we applied carbon and noncarbon soil amendments and analyzed the differences between them on the soil microbial community. We found that carbon soil amendment distinctly altered the soil microbial community. This finding provides key theoretical and technical support for using soil amendments in the future.
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Affiliation(s)
- Qisheng Han
- Farmland Irrigation Research Institute of Chinese Academy of Agricultural Sciences, Xinxiang, China
- Farmland Irrigation Research Institute, CAAS/Key Laboratory of Crop Water Use and Regulation, Ministry of Agriculture, Xinxiang, China
| | - Yuanyuan Fu
- Farmland Irrigation Research Institute of Chinese Academy of Agricultural Sciences, Xinxiang, China
- College of Agriculture of Tarim University, Aral, China
| | - Rangjian Qiu
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, China
| | - Huifeng Ning
- Farmland Irrigation Research Institute of Chinese Academy of Agricultural Sciences, Xinxiang, China
- Farmland Irrigation Research Institute, CAAS/Key Laboratory of Crop Water Use and Regulation, Ministry of Agriculture, Xinxiang, China
| | - Hao Liu
- Farmland Irrigation Research Institute of Chinese Academy of Agricultural Sciences, Xinxiang, China
- Farmland Irrigation Research Institute, CAAS/Key Laboratory of Crop Water Use and Regulation, Ministry of Agriculture, Xinxiang, China
| | - Caixia Li
- Farmland Irrigation Research Institute of Chinese Academy of Agricultural Sciences, Xinxiang, China
- Farmland Irrigation Research Institute, CAAS/Key Laboratory of Crop Water Use and Regulation, Ministry of Agriculture, Xinxiang, China
| | - Yang Gao
- Farmland Irrigation Research Institute of Chinese Academy of Agricultural Sciences, Xinxiang, China
- Farmland Irrigation Research Institute, CAAS/Key Laboratory of Crop Water Use and Regulation, Ministry of Agriculture, Xinxiang, China
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17
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Humate application alters microbiota-mineral interactions and assists in pasture dieback recovery. Heliyon 2023; 9:e13327. [PMID: 36755593 PMCID: PMC9900373 DOI: 10.1016/j.heliyon.2023.e13327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/01/2023] Open
Abstract
Pasture dieback is a rapidly expanding decaying pasture syndrome that affects millions of hectares of agricultural land in Queensland, Australia, making it useless for the cattle industry and decimating farmers' income and welfare. Since the syndrome was first identified in the early 1990s, farmers and agronomists have tried various methods for pasture recovery, including slashing, burning, ploughing and resowing grass, fertilising, destocking, and overstocking. In most cases, after a minimal initial improvement, the grass reverts to dieback within a few weeks. Here, we present an application of potassium humate, a well-known plant growth stimulator, as a possible long-term recovery option. Humate was applied once at the rate of 12 ml per m2. Humate application did not alter the alpha or beta diversity of soil bacterial communities, nor did it change the mineral profile in the soil. However, humate application altered soil microbiota-mineral temporal interactions and introduced subtle changes in the microbial community that could assist pasture recovery. A single humate application increased paddock plant biomass significantly up to 20 weeks post-application. Eleven months after the single application, the paddock was grazed to the ground by the cattle just before the rainfall season. After pasture regrowth, the humate-treated plots significantly improved root morphometric indicators for both grass and dicots and increased the ratio of grass/weeds by 27.6% compared to the water-treated control. While this treatment will not resolve the dieback syndrome, our results invite more research to optimise the use of humate for maximum economic benefit in paddock use under pasture dieback syndrome conditions.
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18
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Sun R, Cao Z, Wen X, Ma L, Zhou Y, Li J, Fu M, Zhu P, Li K, Li Q. Quinone redox cycling drives lignocellulose depolymerization and degradation in composting environments based on metagenomics analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:159009. [PMID: 36162579 DOI: 10.1016/j.scitotenv.2022.159009] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
In this study, the effect of Fe3+ on the quinone redox cycling driving lignocellulosic degradation in composting systems was investigated. The results showed that the degradation rates of cellulose, hemicellulose, and lignin were higher in the experimental group (CT) with Fe2(SO4)3 addition than in the blank group (CK) (CT, 52.55 %, 45.14 %, 56.98 %; CK, 49.63 %, 37.34 %, 52.3 %). Changes in the abundance of key enzymes for quinone reduction (AA3_1, AA3_2, AA6) and the structural succession of microbial communities were analyzed by metagenomic analysis. Among them, Fe2(SO4)3 had the most significant effect on AA3_2, with an approximately 8-fold increase in abundance compared to the beginning of composting. The dominant phylum in the composting process was Actinobacteria. In conclusion, the addition of Fe2(SO4)3 contributed to the quinone redox cycling and effectively improved the degradation rate of lignocellulose in composting.
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Affiliation(s)
- Ru Sun
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Ziyi Cao
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Xiaoli Wen
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Liangcai Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Yucheng Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Jixuan Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Mengxin Fu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Pengfei Zhu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Kecheng Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Qunliang Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
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Yan H, Cong M, Hu Y, Qiu C, Yang Z, Tang G, Xu W, Zhu X, Sun X, Jia H. Biochar-mediated changes in the microbial communities of rhizosphere soil alter the architecture of maize roots. Front Microbiol 2022; 13:1023444. [PMID: 36267182 PMCID: PMC9577002 DOI: 10.3389/fmicb.2022.1023444] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 09/16/2022] [Indexed: 01/10/2023] Open
Abstract
Aeolian sandy soil is a key resource for supporting food production on a global scale; however, the growth of crops in Aeolian sandy soil is often impaired due to its poor physical properties and lack of nutrients and organic matter. Biochar can be used to enhance the properties of Aeolian sandy soil and create an environment more suitable for crop growth, but the long-term effects of biochar on Aeolian sandy soil and microbial communities need to be clarified. Here, a field experiment was conducted in which biochar was applied to a maize (Zea mays L.) field in a single application at different rates: CK, 0 Mg ha-1; C1, 15.75 Mg ha-1; C2, 31.50 Mg ha-1; C3, 63.00 Mg ha-1; and C4, 126.00 Mg ha-1. After 7 years of continuous maize cropping, verify the relationship between root architecture and soil microbial communities under biochar application using a root scanner and 16S/ITS rRNA gene sequencing. The application of biochar promoted the growth of maize. Specifically, total root length, total root surface area, total root volume, and root biomass were 13.99-17.85, 2.52-4.69, 23.61-44.41, and 50.61-77.80% higher in treatments in which biochar was applied (C2, C3, and C4 treatments) compared with the control treatment, respectively. Biochar application increased the diversity of bacterial communities, the ACE index, and Chao 1 index of C1, C2, C3, and C4 treatments increased by 5.83-8.96 and 5.52-8.53%, respectively, compared with the control treatment, and significantly changed the structure of the of bacterial communities in rhizosphere soil. However, there was no significant change in the fungal community. The growth of maize roots was more influenced by rhizosphere bacteria and less by fungal community. A microbial co-occurrence network revealed strong associations among rhizosphere microorganisms. The core taxa (Module hubs taxa) of the bulk soil microbial co-occurrence network were closely related to the total length and total surface area of maize roots, and the core taxa (Connectors taxa) of the rhizosphere soil were closely related to total root length. Overall, our findings indicate that the application of biochar promotes the growth of maize roots in aeolian sandy soil through its effects on bacterial communities in rhizosphere soil.
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Affiliation(s)
- Han Yan
- Xinjiang Agricultural University, College of Resources and Environment, Urumqi, China
| | - Mengfei Cong
- Xinjiang Agricultural University, College of Resources and Environment, Urumqi, China
| | - Yang Hu
- Xinjiang Agricultural University, College of Resources and Environment, Urumqi, China
- Xinjiang Key Laboratory of Soil and Plant Ecological Processes, Urumqi, China
| | - Chunchen Qiu
- Xinjiang Agricultural University, College of Resources and Environment, Urumqi, China
| | - Zailei Yang
- Xinjiang Agricultural University, College of Resources and Environment, Urumqi, China
- Xinjiang Key Laboratory of Soil and Plant Ecological Processes, Urumqi, China
| | - Guangmu Tang
- Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Science, Urumqi, China
- Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Saline-Alkali Land in Arid and Semi-Arid Regions), Ministry of Agriculture and Rural Affairs, Urumqi, China
| | - Wanli Xu
- Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Science, Urumqi, China
- Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Saline-Alkali Land in Arid and Semi-Arid Regions), Ministry of Agriculture and Rural Affairs, Urumqi, China
| | - Xinping Zhu
- Xinjiang Agricultural University, College of Resources and Environment, Urumqi, China
- Xinjiang Key Laboratory of Soil and Plant Ecological Processes, Urumqi, China
| | - Xia Sun
- Xinjiang Agricultural University, College of Resources and Environment, Urumqi, China
- Xinjiang Key Laboratory of Soil and Plant Ecological Processes, Urumqi, China
| | - Hongtao Jia
- Xinjiang Agricultural University, College of Resources and Environment, Urumqi, China
- Xinjiang Key Laboratory of Soil and Plant Ecological Processes, Urumqi, China
- Key Laboratory of Saline-Alkali Soil Improvement and Utilization (Saline-Alkali Land in Arid and Semi-Arid Regions), Ministry of Agriculture and Rural Affairs, Urumqi, China
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Wang X, Zhang Z, Li B, Hao W, Yin W, Ai S, Han J, Wang R, Duan Z. Depicting Fecal Microbiota Characteristic in Yak, Cattle, Yak-Cattle Hybrid and Tibetan Sheep in Different Eco-Regions of Qinghai-Tibetan Plateau. Microbiol Spectr 2022; 10:e0002122. [PMID: 35863031 PMCID: PMC9430443 DOI: 10.1128/spectrum.00021-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 06/08/2022] [Indexed: 12/26/2022] Open
Abstract
The gut microbiota is closely associated with the health and production performance of livestock. Partial studies on ruminant microbiota are already in progress in the Qinghai-Tibetan Plateau Area (QTPA) in China, but large-scale and representative profiles for the QTPA are still lacking. Here, 16S rRNA sequencing was used to analyze 340 samples from yak, cattle, yak-cattle hybrids, and Tibetan sheep, which lived in a shared environment from 4 eco-regions of the QTPA during the same season, and aimed to investigate the fecal microbiota community composition, diversity, and potential function. All samples were clustered into 2 enterotypes, which were derived from the genera Ruminococcaceae UCG-005 and Acinetobacter, respectively. Environment, human activity, species, and parasitization all affected the fecal microbiota. By assessing the relationship between the fecal microbiota and the above variables, we identified a scattered pattern of fecal microbiota dissimilarity based more significantly on diet over other factors. Additionally, gastrointestinal nematode infection could reduce the capacity of the bacterial community for biosynthesis of other secondary metabolites, carbohydrate metabolism, and nucleotide metabolism. Ultimately, this study provided a fecal microbiota profile for ruminants living in 4 eco-regions of the QTPA and its potential future applications in developing animal husbandry regimes. IMPORTANCE Cattle, yak, and sheep reside as the main ruminants distributed throughout most regions of Qinghai-Tibetan Plateau Area (QTPA) in China. However, there is a lack of large-scale research in the QTPA on their fecal microbiota, which can regulate and reflect host health as an internalized "microbial organ." Our study depicted the fecal microbiota community composition and diversity of yak, cattle, yak-cattle hybrids, and Tibetan sheep from 4 eco-regions of the QTPA. Additionally, our results demonstrated here that the ruminant samples could be clustered into 2 enterotypes and that diet outweighed other factors in shaping fecal microbiota in the QTPA. This study provided a basis for understanding the microbiota characteristic of ruminants and its possible applications for livestock production in the QTPA.
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Affiliation(s)
- Xiaoqi Wang
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
- University of Science and Technology of China, Hefei, China
| | - Zhichao Zhang
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Biao Li
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Wenjing Hao
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Weiwen Yin
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Sitong Ai
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Jing Han
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Rujing Wang
- Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
- University of Science and Technology of China, Hefei, China
| | - Ziyuan Duan
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
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Han G, Mannaa M, Jeon H, Jung H, Kim JC, Park AR, Seo YS. Dysbiosis in the Rhizosphere Microbiome of Standing Dead Korean Fir ( Abies koreana). PLANTS (BASEL, SWITZERLAND) 2022; 11:990. [PMID: 35406970 PMCID: PMC9002731 DOI: 10.3390/plants11070990] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/31/2022] [Accepted: 04/03/2022] [Indexed: 11/25/2022]
Abstract
The Korean fir (Abies koreana), a native coniferous tree species mainly found on Mt. Halla in Jeju, South Korea, is suffering from continuous population decline and has been declared an endangered species. Research efforts have focused on the possible abiotic causes behind this worrying decline. However, the potential link between tree vitality and the rhizosphere microbiome remains unclear. In this study, a comparative metagenomic 16S rRNA sequence analysis was used to investigate the composition of the rhizosphere microbiota of samples collected from healthy and die-back-affected trees on Mt. Halla. The results indicated a significant reduction in the richness and diversity of microbiota in the rhizosphere of die-back-affected trees. Moreover, the relative abundance of Proteobacteria, Actinobacteria, and Bacteroidetes were significantly higher in healthy trees than in standing dead trees. Many bacterial genera were significantly more abundant in the rhizosphere of healthy trees, including those known for promoting plant growth and tolerance to biotic and abiotic stresses (e.g., Bradyrhizobium, Rhizomicrobium, Caulobacter, Nitrosospira, Rhizobacter, Paraburkholderia, Rhizobium, Devosia, Caballeronia, Niveispirillum, Dyella, Herbaspirillum, Frankia, Streptomyces, Actinoallomurus, Lysobacter, Luteibacter, Mucilaginibacter, and Variovorax). To our knowledge, this is the first report on rhizosphere bacterial microbiome dysbiosis in die-back-affected Korean fir trees, suggesting that the influence of rhizosphere microbiota should be considered to save this endangered species by investigating possible intervention strategies in future work.
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Affiliation(s)
- Gil Han
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (G.H.); (M.M.); (H.J.)
| | - Mohamed Mannaa
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (G.H.); (M.M.); (H.J.)
- Department of Plant Pathology, Cairo University, Giza 12613, Egypt
| | - Hyoseong Jeon
- Division of Applied Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Korea; (H.J.); (J.-C.K.); (A.R.P.)
| | - Hyejung Jung
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (G.H.); (M.M.); (H.J.)
| | - Jin-Cheol Kim
- Division of Applied Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Korea; (H.J.); (J.-C.K.); (A.R.P.)
| | - Ae Ran Park
- Division of Applied Bioscience and Biotechnology, Chonnam National University, Gwangju 61186, Korea; (H.J.); (J.-C.K.); (A.R.P.)
| | - Young-Su Seo
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (G.H.); (M.M.); (H.J.)
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22
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Guo Z, Yang J, Sarkodie EK, Li K, Deng Y, Meng D, Miao B, Liu H, Liang Y, Yin H, Liu X, Jiang L. Vertical distribution of the toxic metal(loid)s chemical fraction and microbial community in waste heap at a nonferrous metal mining site. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 228:113037. [PMID: 34856484 DOI: 10.1016/j.ecoenv.2021.113037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/01/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Over the past few decades, nonferrous mining has produced numerous waste rock and part of the waste that has not been properly treated was generally dumped at roadsides and hill slopes. However, the vertical distributions of toxic metal(loid)s and composition of microbial communities in waste heap and the under-laid pristine soil are rarely studied. In this work, the fraction-related distributions of toxic metal(loid)s were investigated at a waste heap profile and the indigenous microbial assemblages were also analyzed by Illumina sequencing of 16 s rRNA genes. Results showed that compared to the under-laid pristine soil, content of toxic metal(loid)s, especially Cd, As and Pb, in waste rock layer were higher. Most of As in subsoil existed as non-specifically sorbed and specifically-sorbed fractions, which could be ascribed to the migration from the upper layer. The mobility was significantly correlated with Eh, EC, clay content, CEC and the total content of metal(loid)s. Phyla Proteobacteria, Acidobacteria and Firmicutes dominated the microbial communities. The microbial community compositions at the genus level were similar, but their relative abundances were mainly influenced by pH, CEC, Eh, SOM, and bioavailability content of toxic metal(loid)s. Besides, microbial functions of elements (S, Fe, Mn and As) oxidation/reduction and metabolites (siderophore, biosurfactant, organic acid, phosphatase and urease) potentially were used for pollutants bioremediation.
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Affiliation(s)
- Ziwen Guo
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Jiejie Yang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Emmanuel Konadu Sarkodie
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Kewei Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Yan Deng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Delong Meng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Bo Miao
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Hongwei Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Yili Liang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Huaqun Yin
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Xueduan Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Luhua Jiang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China.
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23
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Zhang Q, Zeng L, Fu X, Pan F, Shi X, Wang T. Comparison of anaerobic co-digestion of pig manure and sludge at different mixing ratios at thermophilic and mesophilic temperatures. BIORESOURCE TECHNOLOGY 2021; 337:125425. [PMID: 34157435 DOI: 10.1016/j.biortech.2021.125425] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/12/2021] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
The objective of this study is to assess the effects of the mixing ratio on the methane production and digestate dewaterability of co-digestion of pig manure (P) and sludge (S). Batch experiments were carried out at five different P/S mixing ratios at mesophilic and thermophilic temperatures. Compared to sludge anaerobic digestion, co-digestion of pig manure with sludge increased methane yield 83.0%-136.5% at mesophilic temperature and 31.3%-68.0% at thermophilic temperature. The normalized capillary suction time (NCST) and total solids (TS) of sediment (centrifugal dewatering) increased when pig manure proportion of substrate increased. The NCST at thermophilic temperatures (4.87-17.58 s g-1-TSS) was higher than that at mesophilic temperatures (1.89-10.95 s g-1-TSS). However, the TS of sediment was close at thermophilic and mesophilic temperatures. The results indicated that anaerobic co-digestion of pig manure and sludge at a proper mixing ratio (P/S = 2:1) provides a good choice for energy recovery and land utilization.
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Affiliation(s)
- Qingfang Zhang
- College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Liyuan Zeng
- College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
| | - Xin Fu
- Jiangxi Province Engineering Research Center of Ecological Chemical Industry (Jiujiang University), Jiujiang 332005, China
| | - Feng Pan
- Jiangxi Province Engineering Research Center of Ecological Chemical Industry (Jiujiang University), Jiujiang 332005, China
| | - Xiaofeng Shi
- Xi'an Scientific Research Institute of Environmental Protection, Xi'an 710061, China
| | - Tianfeng Wang
- College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; Jiangxi Province Engineering Research Center of Ecological Chemical Industry (Jiujiang University), Jiujiang 332005, China.
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