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Anzuay MS, Chiatti MH, Intelangelo AB, Ludueña LM, Viso NP, Angelini JG, Taurian T. Employment of pqqE gene as molecular marker for the traceability of Gram negative phosphate solubilizing bacteria associated to plants. Curr Genet 2024; 70:12. [PMID: 39093429 DOI: 10.1007/s00294-024-01296-4] [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: 05/16/2024] [Revised: 07/02/2024] [Accepted: 07/22/2024] [Indexed: 08/04/2024]
Abstract
Insoluble phosphorous compounds solubilization by soil bacteria is of great relevance since it puts available the phosphorus to be used by plants. The production of organic acids is the main microbiological mechanism by which insoluble inorganic phosphorus compounds are solubilized. In Gram negative bacteria, gluconic acid is synthesized by the activity of the holoenzyme glucose dehydrogenase-pyrroloquinoline quinine named GDH-PQQ. The use of marker genes is a very useful tool to evaluate the persistence of the introduced bacteria and allow to follow-up the effect of biotic and abiotic factors on these beneficial microorganisms in the soil. In previous studies we detected the presence of the pqqE gene in a great percentage of both non-culturable and culturable native soil bacteria. The objective of this study was to analyze the phylogeny of the sequence of pqqE gene and its potential for the study of phosphate solubilizing bacteria from pure and mixed bacterial cultures and rhizospheric soil samples. For this, the presence of the pqqE gene in the genome of phosphate solubilizing bacteria that belong to several bacteria was determined by PCR. Also, this gene was analyzed from mixed bacterial cultures and rhizospheric soil associated to peanut plants inoculated or not with phosphate solubilizing bacteria. For this, degenerate primers designed from several bacterial genera and specific primers for the genus Pseudomonas spp., designed in this study, were used. DNA template used from simple or mixed bacterial cultures and from rhizospheric soil samples was obtained using two different DNA extraction techniques. Results indicated that pqqE gene amplification product was found in the genome of all Gram negative phosphate solubilizing bacteria analyzed. It was possible to detect this gene in the DNA obtained from mixed cultures where these bacteria grew in interaction with other microorganisms and in that obtained from rhizospheric soil samples inoculated or not with these bacteria. The phylogenetic analysis indicated that pqqE gene is a conserved gene within related genera. In conclusion, pqqE gene could be a potential marker for the study of phosphate solubilizing bacterial populations.
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Affiliation(s)
- María Soledad Anzuay
- Instituto de Investigaciones Agrobiotecnológicas (CONICET-UNRC), Río Cuarto, Argentina
| | - Mario Hernán Chiatti
- Instituto de Investigaciones Agrobiotecnológicas (CONICET-UNRC), Río Cuarto, Argentina
| | | | | | - Natalia Pin Viso
- Instituto de Microbiología y Zoología Agrícola, IMyZA, IABiMo, INTA, Hurlingham, Buenos Aires, Argentina
| | | | - Tania Taurian
- Instituto de Investigaciones Agrobiotecnológicas (CONICET-UNRC), Río Cuarto, Argentina.
- Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal 3, Río Cuarto, Córdoba, 5800, Argentina.
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Wu Q, Chen Y, Dou X, Liao D, Li K, An C, Li G, Dong Z. Microbial fertilizers improve soil quality and crop yield in coastal saline soils by regulating soil bacterial and fungal community structure. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 949:175127. [PMID: 39084360 DOI: 10.1016/j.scitotenv.2024.175127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 07/19/2024] [Accepted: 07/27/2024] [Indexed: 08/02/2024]
Abstract
Salinization is a global problem affecting agricultural productivity and sustainability. The application of exogenous microbial fertilizer harbors great potential for improving saline-alkali soil conditions and increasing land productivity. Yet the responses to microbial fertilizer application rate in terms of rhizosphere soil biochemical characteristics, soil microbial community, and crop yield and their interrelationships and underlying mechanisms are still unclear. Here, we studied changes to rhizosphere soil-related variables, soil enzyme activity (catalase, sucrase, urease), microbial community diversity, and sweet sorghum (Sorghum bicolor (L.) Moench) yield under four fertilization concentration levels (0, 0.12, 0.24, and 0.36 kg m-2) in a saline-alkali ecosystem (Shandong, China). Our results showed that the best improvement effect on soil when the microbial fertilizer was applied at a rate of 0.24 kg m-2. Compared with the control (sweet sorghum + no fertilizer), it significantly increased soil organic carbon (21.50 %), available phosphorus (26.14 %), available potassium (36.30 %), and soil urease (38.46 %), while significantly reducing soil pH (2.21 %) and EC (12.04 %). Meanwhile, the yield of sweet sorghum was increased by 24.19 %. This is mainly because microbial fertilizers enhanced the diversity and the network complexity of bacterial and fungal communities, and influenced catalase (CAT), urease (UE), and sucrase (SC), thereby facilitating nutrient release in the soil, enhancing soil fertility, and indirectly influencing sweet sorghum productivity. Among them, Gemmatimonadota and Verrucomicrobiota may be the key microbial factors affecting sweet sorghum yield, while available potassium, soil urease and available phosphorus are the main soil factors. These findings provide valuable theoretical insights for preserving the health of coastal saline-alkali soils and meeting the agricultural demand for increased yield per unit of land area.
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Affiliation(s)
- Qicong Wu
- Co-Innovation Center for Soil-Water and Forest-Grass Ecological Conservation in Yellow River Basin of Shandong Higher Education Institutions, College of Forestry, Shandong Agricultural University, Tai'an 271018, China; Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration, Tai'an 271018, China
| | - Yang Chen
- Co-Innovation Center for Soil-Water and Forest-Grass Ecological Conservation in Yellow River Basin of Shandong Higher Education Institutions, College of Forestry, Shandong Agricultural University, Tai'an 271018, China; Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration, Tai'an 271018, China
| | - Xiaohui Dou
- Co-Innovation Center for Soil-Water and Forest-Grass Ecological Conservation in Yellow River Basin of Shandong Higher Education Institutions, College of Forestry, Shandong Agricultural University, Tai'an 271018, China; Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration, Tai'an 271018, China
| | - Dongxi Liao
- Co-Innovation Center for Soil-Water and Forest-Grass Ecological Conservation in Yellow River Basin of Shandong Higher Education Institutions, College of Forestry, Shandong Agricultural University, Tai'an 271018, China; Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration, Tai'an 271018, China
| | - Kaiyi Li
- Co-Innovation Center for Soil-Water and Forest-Grass Ecological Conservation in Yellow River Basin of Shandong Higher Education Institutions, College of Forestry, Shandong Agricultural University, Tai'an 271018, China; Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration, Tai'an 271018, China
| | - Chunchun An
- Co-Innovation Center for Soil-Water and Forest-Grass Ecological Conservation in Yellow River Basin of Shandong Higher Education Institutions, College of Forestry, Shandong Agricultural University, Tai'an 271018, China; Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration, Tai'an 271018, China
| | - Guohui Li
- Water Resources Research Institute of Shandong Province, Ji'nan 250000, China.
| | - Zhi Dong
- Co-Innovation Center for Soil-Water and Forest-Grass Ecological Conservation in Yellow River Basin of Shandong Higher Education Institutions, College of Forestry, Shandong Agricultural University, Tai'an 271018, China; Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration, Tai'an 271018, China.
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3
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Li C, Hua C, Chen L, Miao Z, Xu R, Peng S, Ge Z, Mao L. Preparation of bacterial fertilizer from biogas residue after anaerobic co-digestion of kitchen waste and residual sludge. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:44005-44022. [PMID: 38918298 DOI: 10.1007/s11356-024-33924-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 06/03/2024] [Indexed: 06/27/2024]
Abstract
Azotobacter chroococcum and Bacillus subtilis were selected as fermentation strains, and biogas residue after anaerobic digestion of kitchen waste and residual sludge was used as fermentation substrate. A single factor optimization test was used to optimize the solid-state fermentation parameters of biogas residue with the number of viable bacteria and the number of spores as indexes. The results showed that the optimum inoculation conditions involved the following: 55% initial moisture content, 15% initial inoculation amount, 30 ℃, and 1:1 initial inoculation ratio for 13 days. Pot experiment showed that the prepared three kinds of bacterial fertilizers could not only effectively promote the growth of white clover, improve the composition of soil nutrients, but also change the structure of soil bacterial community, which is of great significance to the health of soil ecosystem in white clover.
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Affiliation(s)
- Chuan Li
- Co-Innovation Center for Sustainable Forestry in Southern China, Laboratory of Biodiversity and Conservation, College of Ecology and Environment, Nanjing Forestry University, Nanjing, 210037, China
- National Positioning Observation Station of Hung-Tse Lake Wetland Ecosystem in Jiangsu Province, Hongze, 223100, China
| | - Chang Hua
- Co-Innovation Center for Sustainable Forestry in Southern China, Laboratory of Biodiversity and Conservation, College of Ecology and Environment, Nanjing Forestry University, Nanjing, 210037, China
- National Positioning Observation Station of Hung-Tse Lake Wetland Ecosystem in Jiangsu Province, Hongze, 223100, China
| | - Lingling Chen
- Co-Innovation Center for Sustainable Forestry in Southern China, Laboratory of Biodiversity and Conservation, College of Ecology and Environment, Nanjing Forestry University, Nanjing, 210037, China
- National Positioning Observation Station of Hung-Tse Lake Wetland Ecosystem in Jiangsu Province, Hongze, 223100, China
| | - Zimei Miao
- College of Forestry and Grassland, College of Soil and Water Conservation, Nanjing Forestry University, Longpan Road 159, Nanjing, 210037, China.
| | - Rui Xu
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Sili Peng
- Co-Innovation Center for Sustainable Forestry in Southern China, Laboratory of Biodiversity and Conservation, College of Ecology and Environment, Nanjing Forestry University, Nanjing, 210037, China
| | - Zhiwei Ge
- Co-Innovation Center for Sustainable Forestry in Southern China, Laboratory of Biodiversity and Conservation, College of Ecology and Environment, Nanjing Forestry University, Nanjing, 210037, China
| | - Lingfeng Mao
- Co-Innovation Center for Sustainable Forestry in Southern China, Laboratory of Biodiversity and Conservation, College of Ecology and Environment, Nanjing Forestry University, Nanjing, 210037, China
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Yang X, Zhang K, Qi Z, Shaghaleh H, Gao C, Chang T, Zhang J, Hamoud YA. Field Examinations on the Application of Novel Biochar-Based Microbial Fertilizer on Degraded Soils and Growth Response of Flue-Cured Tobacco ( Nicotiana tabacum L.). PLANTS (BASEL, SWITZERLAND) 2024; 13:1328. [PMID: 38794400 PMCID: PMC11125685 DOI: 10.3390/plants13101328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/07/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024]
Abstract
Southwestern China is receiving excessive chemical fertilizers to meet the challenges of continuous cropping. These practices are deteriorating the soil environment and affecting tobacco (Nicotiana tabacum L.) yield and quality adversely. A novel microbially enriched biochar-based fertilizer was synthesized using effective microorganisms, tobacco stalk biochar and basal fertilizer. A field-scale study was conducted to evaluate the yield response of tobacco grown on degraded soil amended with our novel biochar-based microbial fertilizer (BF). Four treatments of BF (0%, 1.5%, 2.5% and 5%) were applied in the contaminated field to grow tobacco. The application of BF1.5, BF2.5 and BF5.0 increased the available water contents by 9.47%, 1.18% and 2.19% compared to that with BF0 respectively. Maximum growth of tobacco in terms of plant height and leaf area was recorded for BF1.5 compared to BF0. BF1.5, BF2.5 and BF5.0 increased SPAD by 13.18-40.53%, net photosynthetic rate by 5.44-60.42%, stomatal conductance by 8.33-44.44%, instantaneous water use efficiency by 55.41-93.24% and intrinsic water use efficiency by 0.09-24.11%, while they decreased the intercellular CO2 concentration and transpiration rate by 3.85-6.84% and 0.29-47.18% relative to BF0, respectively (p < 0.05). The maximum increase in tobacco yield was recorded with BF1.5 (23.81%) compared to that with BF0. The present study concludes that the application of BF1.5 improves and restores the degraded soil by improving the hydraulic conductivity and by increasing the tobacco yield.
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Affiliation(s)
- Xu Yang
- College of Hydrology and Water Resources, Hohai University, Nanjing 210024, China; (X.Y.); (Y.A.H.)
- The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210024, China
- China Meteorological Administration Hydro-Meteorology Key Laboratory, Hohai University, Nanjing 210024, China
| | - Ke Zhang
- College of Hydrology and Water Resources, Hohai University, Nanjing 210024, China; (X.Y.); (Y.A.H.)
- The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210024, China
- China Meteorological Administration Hydro-Meteorology Key Laboratory, Hohai University, Nanjing 210024, China
- Yangtze Institute for Conservation and Development, Hohai University, Nanjing 210024, China
- Key Laboratory of Water Big Data Technology of Ministry of Water Resources, Hohai University, Nanjing 210024, China
| | - Zhiming Qi
- Department of Bioresource Engineering, McGill University, Montreal, QC H9X 3V9, Canada;
| | - Hiba Shaghaleh
- College of Environment, Hohai University, Nanjing 210024, China;
| | - Chao Gao
- Institute of Geographical Sciences, Henan Academy of Sciences, Zhengzhou 450052, China;
| | - Tingting Chang
- College of Agricultural Science and Engineering, Hohai University, Nanjing 211100, China; (T.C.); (J.Z.)
| | - Jie Zhang
- College of Agricultural Science and Engineering, Hohai University, Nanjing 211100, China; (T.C.); (J.Z.)
| | - Yousef Alhaj Hamoud
- College of Hydrology and Water Resources, Hohai University, Nanjing 210024, China; (X.Y.); (Y.A.H.)
- The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210024, China
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Wongkiew S, Aksorn S, Amnuaychaichana S, Polprasert C, Noophan PL, Kanokkantapong V, Koottatep T, Surendra KC, Khanal SK. Bioponic systems with biochar: Insights into nutrient recovery, heavy metal reduction, and microbial interactions in digestate-based bioponics. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 178:267-279. [PMID: 38422680 DOI: 10.1016/j.wasman.2024.02.027] [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: 11/07/2023] [Revised: 02/04/2024] [Accepted: 02/18/2024] [Indexed: 03/02/2024]
Abstract
Bioponics is a nutrient-recovery technology that transforms nutrient-rich organic waste into plant biomass/bioproducts. Integrating biochar with digestate from anaerobic wastewater treatment process can improve resource recovery while mitigating heavy metal contamination. The overarching goal of this study was to investigate the application of biochar in digestate-based bioponics, focusing on its efficacy in nutrient recovery and heavy metal removal, while also exploring the microbial community dynamics. In this study, biochar was applied at 50 % w/w with 500 g dry weight of digestate during two 28-day crop cycles (uncontrolled pH and pH 5.5) using white stem pak choi (Brassica rapa var. chinensis) as a model crop. The results showed that the digestate provided sufficient phosphorus and nitrogen, supporting plant growth. Biochar amendment improved plant yield and phosphate solubilization and reduced nitrogen loss, especially at the pH 5.5. Furthermore, biochar reduced the heavy metal accumulation in plants, while concentrating these metals in the residual sludge. However, owing to potential non-carcinogenic and carcinogenic health risks, it is still not recommended to directly consume plants cultivated in digestate-based bioponic systems. Additionally, biochar amendment exhibited pronounced impact on the microbial community, promoting microbes responsible for nutrient solubilization and cycling (e.g., Tetrasphaera, Herpetosiphon, Hyphomicrobium, and Pseudorhodoplanes) and heavy metal stabilization (e.g., Leptolinea, Fonticella, Romboutsia, and Desulfurispora) in both the residual sludge and plants. Overall, the addition of biochar enhanced the microbial community and facilitated the metal stabilization and the cycling of nutrients within both residual sludge and root systems, thereby improving the overall efficiency of the bioponics.
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Affiliation(s)
- Sumeth Wongkiew
- Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand; Water Science and Technology for Sustainable Environment Research Unit, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Satja Aksorn
- Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Suchana Amnuaychaichana
- Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Chongrak Polprasert
- Thammasat School of Engineering, Thammasat University, Pathumthani, Thailand
| | - Pongsak Lek Noophan
- Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand
| | - Vorapot Kanokkantapong
- Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand; Waste Utilization and Ecological Risk Assessment Research Unit, Chulalongkorn University, Bangkok 10330, Thailand
| | - Thammarat Koottatep
- Environmental Engineering and Management, School of Environment, Resources and Development, Asian Institute of Technology, Pathumthani, Thailand
| | - K C Surendra
- Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, Honolulu, HI, USA; Global Institute for Interdisciplinary Studies, 44600 Kathmandu, Nepal
| | - Samir Kumar Khanal
- Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, Honolulu, HI, USA; Department of Environmental Engineering, Korea University Sejong Campus, Sejong-ro 2511, Sejong, Korea (Affiliate Faculty)
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Zeng Y, Wang M, Yu Y, Wang L, Cui L, Li C, Liu Y, Zheng Y. Rice N-biofertilization by inoculation with an engineered photosynthetic diazotroph. World J Microbiol Biotechnol 2024; 40:136. [PMID: 38499730 DOI: 10.1007/s11274-024-03956-6] [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: 01/05/2024] [Accepted: 03/13/2024] [Indexed: 03/20/2024]
Abstract
Photosynthetic diazotrophs expressing iron-only (Fe-only) nitrogenase can be developed into a promising biofertilizer, as it is independent on the molybdenum availability in the soil. However, the expression of Fe-only nitrogenase in diazotrophs is repressed by the fixed nitrogen of the soil, limiting the efficiency of nitrogen fixation in farmland with low ammonium concentrations that are inadequate for sustainable crop growth. Here, we succeeded in constitutively expressing the Fe-only nitrogenase even in the presence of ammonium by controlling the transcription of Fe-only nitrogenase gene cluster (anfHDGK) with the transcriptional activator of Mo nitrogenase (NifA*) in several different ways, indicating that the engineered NifA* strains can be used as promising chassis cells for efficient expression of different types of nitrogenases. When applied as a biofertilizer, the engineered Rhodopseudomonas palustris effectively stimulated rice growth, contributing to the reduced use of chemical fertilizer and the development of sustainable agriculture.
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Affiliation(s)
- Yan Zeng
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Mengmei Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yunkai Yu
- Qiqihar Branch of Heilongjiang Academy of Agricultural Sciences, Qiqihar, 161006, China
| | - Lida Wang
- Qiqihar Branch of Heilongjiang Academy of Agricultural Sciences, Qiqihar, 161006, China
| | - Lingwei Cui
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chang Li
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101, China
- College of Agriculture, Shanxi Agricultural University, Jinzhong, 030801, China
| | - Ying Liu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101, China
| | - Yanning Zheng
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No.1 Beichen West Road, Chaoyang District, Beijing, 100101, China.
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Wang T, Xu J, Chen J, Liu P, Hou X, Yang L, Zhang L. Progress in Microbial Fertilizer Regulation of Crop Growth and Soil Remediation Research. PLANTS (BASEL, SWITZERLAND) 2024; 13:346. [PMID: 38337881 PMCID: PMC10856823 DOI: 10.3390/plants13030346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024]
Abstract
More food is needed to meet the demand of the global population, which is growing continuously. Chemical fertilizers have been used for a long time to increase crop yields, and may have negative effect on human health and the agricultural environment. In order to make ongoing agricultural development more sustainable, the use of chemical fertilizers will likely have to be reduced. Microbial fertilizer is a kind of nutrient-rich and environmentally friendly biological fertilizer made from plant growth-promoting bacteria (PGPR). Microbial fertilizers can regulate soil nutrient dynamics and promote soil nutrient cycling by improving soil microbial community changes. This process helps restore the soil ecosystem, which in turn promotes nutrient uptake, regulates crop growth, and enhances crop resistance to biotic and abiotic stresses. This paper reviews the classification of microbial fertilizers and their function in regulating crop growth, nitrogen fixation, phosphorus, potassium solubilization, and the production of phytohormones. We also summarize the role of PGPR in helping crops against biotic and abiotic stresses. Finally, we discuss the function and the mechanism of applying microbial fertilizers in soil remediation. This review helps us understand the research progress of microbial fertilizer and provides new perspectives regarding the future development of microbial agent in sustainable agriculture.
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Affiliation(s)
- Tingting Wang
- College of Plant Protection, Shandong Agricultural University, Tai’an 271002, China; (T.W.); (J.X.); (P.L.); (X.H.)
| | - Jiaxin Xu
- College of Plant Protection, Shandong Agricultural University, Tai’an 271002, China; (T.W.); (J.X.); (P.L.); (X.H.)
| | - Jian Chen
- Institute of Food Quality and Safety, Jiangsu Academy of Agricultural Sciences, Nanjing 221122, China;
| | - Peng Liu
- College of Plant Protection, Shandong Agricultural University, Tai’an 271002, China; (T.W.); (J.X.); (P.L.); (X.H.)
| | - Xin Hou
- College of Plant Protection, Shandong Agricultural University, Tai’an 271002, China; (T.W.); (J.X.); (P.L.); (X.H.)
| | - Long Yang
- College of Plant Protection, Shandong Agricultural University, Tai’an 271002, China; (T.W.); (J.X.); (P.L.); (X.H.)
| | - Li Zhang
- College of Plant Protection, Shandong Agricultural University, Tai’an 271002, China; (T.W.); (J.X.); (P.L.); (X.H.)
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Wang X, Zhou Z, Zijing L, Xia L, Song S, Meza JVG, Montes ML, Li J. Surge of native rare taxa in tailings soil induced by peat bacterial invasion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168596. [PMID: 37972774 DOI: 10.1016/j.scitotenv.2023.168596] [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: 09/11/2023] [Revised: 10/25/2023] [Accepted: 11/13/2023] [Indexed: 11/19/2023]
Abstract
The pivotal role of the native bacterial community in maintaining soil health, particularly in degraded tailings environments, is often overlooked. This study utilized peat, rich in microorganisms, to investigate its impact on soil function and native bacteria response in copper tailings-soil. Through 16S rRNA gene sequencing, changes in nutrient cycling, organic matter decomposition, and microbial activity were assessed post one-year peat remediation. Results from FEAST and cluster analysis revealed that peat-derived species disproportionately influenced tailings microbial community remediation, supported by the microbial invasion theory. Tailings responded positively to these species, with optimal function achieved at 5 % peat dosage. Peat biomarkers (Actinobacteriota, Bacteroida, Chloroflexi, and Firmicutes) played key roles in heavy metal removal and nutrition fixation. The Random Forest model and co-occurrence network highlighted contributions from native rare species (Dependentiae and Latescibacterota) activated by peat addition. These insights underscore the resilience of rare taxa and provide a foundation for soil health restoration in tailings areas. By emphasizing the importance of peat as a potential exogenous solution for activating indigenous microbial functions, these findings offer valuable insights for developing effective and sustainable remediation strategies in mining-affected regions.
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Affiliation(s)
- Xizhuo Wang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei Province 430070, China
| | - Zhou Zhou
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei Province 430070, China
| | - Lu Zijing
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei Province 430070, China
| | - Ling Xia
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei Province 430070, China.
| | - Shaoxian Song
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei Province 430070, China
| | - J Viridiana García Meza
- Instituto de Física, Universidad Autonoma de San Luis Potosi, Av. Manuel Nava 6, Zona Universitaria, C.P., San Luis Potosí 78290, Mexico
| | | | - Jianbo Li
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei Province 430070, China; Instituto de Física, Universidad Autonoma de San Luis Potosi, Av. Manuel Nava 6, Zona Universitaria, C.P., San Luis Potosí 78290, Mexico.
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9
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Wang P, Wang S, Chen F, Zhang T, Kong W. Preparation of two types plant biochars and application in soil quality improvement. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167334. [PMID: 37748605 DOI: 10.1016/j.scitotenv.2023.167334] [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: 07/14/2023] [Revised: 09/14/2023] [Accepted: 09/22/2023] [Indexed: 09/27/2023]
Abstract
Soil degradation is a global problem that endangers sustainable development. Biochar is a solid, stable, carbon-rich, and highly aromatic material prepared using plant feedstock with a rich pore structure, high specific surface area, and high capacity for holding water and nutrients. This study selected two typical plant resource raw materials, Spartina alterniflora (P. australis) and Spartina alterniflora (S. alterniflora), to prepare biochar at different temperatures, and then investigated the effects of different raw materials and preparation temperatures on the biochar's characteristics. After re-activation treatment, soil improvement experiments were conducted under different carbon application rates. The prepared biochar was alkaline, and contained abundant oxygen-containing functional groups and nutrients (including C, N, Ca, Na, and Mg). Biochar addition had significant effects on the soil microbial community and soil enzyme activity. Finally, by calculating the membership function and factor weights, the various physicochemical and biological properties of the soil were quantified in the form of soil quality indices. The results showed that biochar application had a significant promoting effect on soil quality, mainly through providing rich nutrient sources, enhancing the soil cation exchange capacity and therefore the nutrient effectiveness, and increasing the ability of soil to retain nutrients. The application of biochar (different types) has changed the original nutrient composition, microbial community, and enzyme activity of the soil, and under the combined action of these factors, the soil quality index (SQI) has been improved. This study provides a feasible soil fertility improvement strategy.
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Affiliation(s)
- Pengyuan Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Shuping Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Feijie Chen
- Zhejiang Geological Big Data Application Center Co., Ltd, Hangzhou 310000, China
| | - Tianxu Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Weijing Kong
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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Wu X, Wang X, Meng H, Zhang J, Lead JR, Hong J. Pseudomonas fluorescens with Nitrogen-Fixing Function Facilitates Nitrogen Recovery in Reclaimed Coal Mining Soils. Microorganisms 2023; 12:9. [PMID: 38276177 PMCID: PMC10818423 DOI: 10.3390/microorganisms12010009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/13/2023] [Accepted: 12/14/2023] [Indexed: 01/27/2024] Open
Abstract
Coal mining has caused significant soil nitrogen loss in mining areas, limiting reclamation and reuse in agriculture. This article studies the effects of organic fertilizer, inorganic fertilizer, and the combined application of Pseudomonas fluorescens with the ability of nitrogen fixation on soil nitrogen accumulation and composition in the reclamation area of the Tunlan Coal Mine from 2016 to 2022 under the conditions of equal nitrogen application, providing a scientific basis for microbial fertilization and the rapid increase in nitrogen content in the reclaimed soil of mining areas. The results showed that as the reclamation time increased, the nitrogen content and the composition and structure of the soil treated with fertilization rapidly evolved toward normal farmland soil. The soil nitrogen content increased most rapidly in the presence of added P. fluorescens + organic fertilizer (MB). Compared to other treatments (inorganic fertilizer (CF), organic fertilizer (M), and P. fluorescens + inorganic fertilizer (CFB)), MB increased total nitrogen (TN) to normal farmland soil levels 1-3 years earlier. The comprehensive scores of MB and CFB on the two principal components increased by 1.58 and 0.79 compared to those of M and CF treatments, respectively. This indicates that the combination of P. fluorescens and organic fertilizer improves soil nitrogen accumulation more effectively than the combination of P. fluorescens and inorganic fertilizer. In addition, the application of P. fluorescens increases the content of unknown nitrogen (UN) in acid-hydrolysable nitrogen (AHN) and decreases the content of amino acid nitrogen (AAN) and ammonia nitrogen (AN). However, there was no significant effect on the content of ammonium nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) in soil-mineralized nitrogen (SMN). When combined with inorganic fertilizer, the contribution of SMN to TN increased by 14.78%, while when combined with organic fertilizer, the contribution of AHN to TN increased by 44.77%. In summary, the use of P. fluorescens is beneficial for nitrogen recovery in the reclaimed soil of coal-mining areas. The optimal fertilization method under the experimental conditions is the combination of P. fluorescens and organic fertilizer.
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Affiliation(s)
- Xin Wu
- College of Resources and Environment, Shanxi Agricultural University, Taigu County, Jinzhong 030801, China; (X.W.); (H.M.); (J.Z.)
| | - Xiangying Wang
- College of Life Sciences, Shanxi Agricultural University, Taigu County, Jinzhong 030801, China;
| | - Huisheng Meng
- College of Resources and Environment, Shanxi Agricultural University, Taigu County, Jinzhong 030801, China; (X.W.); (H.M.); (J.Z.)
| | - Jie Zhang
- College of Resources and Environment, Shanxi Agricultural University, Taigu County, Jinzhong 030801, China; (X.W.); (H.M.); (J.Z.)
| | - Jamie R. Lead
- Center for Environmental Nanoscience and Risk, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA;
| | - Jianping Hong
- College of Resources and Environment, Shanxi Agricultural University, Taigu County, Jinzhong 030801, China; (X.W.); (H.M.); (J.Z.)
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Algethami JS, Irshad MK, Javed W, Alhamami MAM, Ibrahim M. Iron-modified biochar improves plant physiology, soil nutritional status and mitigates Pb and Cd-hazard in wheat ( Triticum aestivum L.). FRONTIERS IN PLANT SCIENCE 2023; 14:1221434. [PMID: 37662164 PMCID: PMC10470012 DOI: 10.3389/fpls.2023.1221434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 07/11/2023] [Indexed: 09/05/2023]
Abstract
Environmental quality and food safety is threatened by contamination of lead (Pb) and cadmium (Cd) heavy metals in agricultural soils. Therefore, it is necessary to develop effective techniques for remediation of such soils. In this study, we prepared iron-modified biochar (Fe-BC) which combines the unique characteristics of pristine biochar (BC) and iron. The current study investigated the effect of pristine and iron modified biochar (Fe-BC) on the nutritional values of soil and on the reduction of Pb and Cd toxicity in wheat plants (Triticum aestivum L.). The findings of present study exhibited that 2% Fe-BC treatments significantly increased the dry weights of roots, shoots, husk and grains by 148.2, 53.2, 64.2 and 148%, respectively compared to control plants. The 2% Fe-BC treatment also enhanced photosynthesis rate, transpiration rate, stomatal conductance, intercellular CO2, chlorophyll a and b contents, by 43.2, 88.4, 24.9, 32.5, 21.4, and 26.7%, respectively. Moreover, 2% Fe-BC treatment suppressed the oxidative stress in wheat plants by increasing superoxide dismutase (SOD) and catalase (CAT) by 62.4 and 69.2%, respectively. The results showed that 2% Fe-BC treatment significantly lowered Cd levels in wheat roots, shoots, husk, and grains by 23.7, 44.5, 33.2, and 76.3%. Whereas, Pb concentrations in wheat roots, shoots, husk, and grains decreased by 46.4, 49.4, 53.6, and 68.3%, respectively. Post-harvest soil analysis showed that soil treatment with 2% Fe-BC increased soil urease, CAT and acid phosphatase enzyme activities by 48.4, 74.4 and 117.3%, respectively. Similarly, 2% Fe-BC treatment significantly improved nutrients availability in the soil as the available N, P, K, and Fe contents increased by 22, 25, 7.3, and 13.3%, respectively. Fe-BC is a viable solution for the remediation of hazardous Cd and Pb contaminated soils, and improvement of soil fertility status.
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Affiliation(s)
- Jari S. Algethami
- Department of Chemistry, College of Science and Arts, Najran University, Najran, Saudi Arabia
- Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran, Saudi Arabia
| | - Muhammad Kashif Irshad
- Department of Environmental and Energy Engineering, Yonsei University, Wonju, Republic of Korea
- Department of Environmental Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Wasim Javed
- Punjab Bioenergy Institute (PBI), University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Mohsen A. M. Alhamami
- Department of Chemistry, College of Science and Arts, Najran University, Najran, Saudi Arabia
| | - Muhammad Ibrahim
- Department of Environmental Sciences, Government College University Faisalabad, Faisalabad, Pakistan
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Janati W, Mikou K, El Ghadraoui L, Errachidi F. Growth stimulation of two legumes ( Vicia faba and Pisum sativum) using phosphate-solubilizing bacteria inoculation. Front Microbiol 2023; 14:1212702. [PMID: 37645230 PMCID: PMC10461066 DOI: 10.3389/fmicb.2023.1212702] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 07/28/2023] [Indexed: 08/31/2023] Open
Abstract
The application of chemical fertilizers for plant growth and protection is one of the reasons for the environment and ecosystem destruction, thus, sustainable agriculture is gaining popularity in research and among farming communities. Although most soils are high in total phosphorus (P), a large portion is unavailable to plants and regarded as a growth-limiting factor. P-solubilizing bacteria (PSB) exploitation is a newly developed bio-solution for enhancing rhizosphere P availability; however, the effect of these bacteria on soil quality and the different phases of plant growth remains unknown. This study aims to evaluate the impact of five strains of PSB, isolated from legume rhizosphere, on the growth of two plants (Vicia faba and Pisum sativum) and certain soil properties. The efficient strains of PSB used are characterized by the P-solubilization, the ACC deaminase activity, the fixation of N, and the IAA, HCN, and siderophores production. The activity of these bacteria is tested in vitro and in vivo under controlled conditions on the growth of the two plants supplemented with the rock P (RP). According to our findings, all PSBs strains outperformed the control in terms of enhancing the growth of the tested legumes with a percentage ranging from 77.78 to 88.88%, respectively. The results showed that all treatments significantly improved plant parameters like nitrogen- (N) and P-content in the plants (67.50, 23.11%), respectively. Also, an increase in the fresh and dry weights of above- (41.17, 38.57%) and below-ground biomasses (56.6, 42.28%), respectively. Compared to the control, this leads to an increase of 72% in root length, 40.91% in plant dry weight, and 40.07% in fresh weight. Rhizospheric soil in PSBs treatments displayed high levels of N, P, and organic matter. All treatments were found to have significantly higher levels of alkaline phosphatase, basal soil respiration, and β-glucosidase activity than the control. It is concluded that multi-traits PSB can be an alternative for utilizing chemical fertilizers to enhance soil quality and plant growth. Despite the potency of PSBs, its use as a source for the development of sustainable agriculture implies focusing on crop species and adaptation, stress tolerance and climate resilience.
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