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Li Y, Sun X, Yang R, Guo L, Li C, Wang X, Li B, Liu H, Wang Q, Soleimani M, Ren Y, Sun W. Phototrophic Nitrogen Fixation, a Neglected Biogeochemical Process in Mine Tailings? Environ Sci Technol 2024; 58:6192-6203. [PMID: 38551467 DOI: 10.1021/acs.est.3c09460] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
Biological nitrogen fixation (BNF) has important ecological significance in mine tailing by contributing to the initial accumulation of nitrogen. In addition to chemolithotrophic and heterotrophic BNF, light may also fuel BNF in oligotrophic mine tailings. However, knowledge regarding the occurrence and ecological significance of this biogeochemical process in mine tailings remains ambiguous. The current study observed phototrophic BNF in enrichment cultures established from three primary successional stages (i.e., original tailings, biological crusts, and pioneer plants) of tailings. Notably, phototrophic BNF in tailings may be more active at vegetation stages (i.e., biological crusts and pioneering plants) than in bare tailings. DNA-stable isotope probing identified Roseomonas species as potential aerobic anoxygenic phototrophs responsible for phototrophic BNF. Furthermore, metagenomic binning as well as genome mining revealed that Roseomonas spp. contained essential genes involved in nitrogen fixation, anoxygenic photosynthesis, and carbon fixation, suggesting their genetic potential to mediate phototrophic BNF. A causal inference framework equipped with the structural causal model suggested that the enrichment of putative phototrophic diazotrophic Roseomonas may contribute to an elevated total nitrogen content during primary succession in these mine tailings. Collectively, our findings suggest that phototrophic diazotrophs may play important roles in nutrient accumulation and hold the potential to facilitate ecological succession in tailings.
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Affiliation(s)
- Yongbin Li
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xiaoxu Sun
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Rui Yang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Lifang Guo
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Cangbai Li
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Xiaoyu Wang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Baoqin Li
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Huaqing Liu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Qi Wang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Mohsen Soleimani
- Department of Natural Resources, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Youhua Ren
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Weimin Sun
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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Sun X, Zhang H, Yang Z, Xing X, Fu Z, Li X, Kong Y, Li W, Du H, Zhang C. Overexpression of GmPAP4 Enhances Symbiotic Nitrogen Fixation and Seed Yield in Soybean under Phosphorus-Deficient Condition. Int J Mol Sci 2024; 25:3649. [PMID: 38612461 PMCID: PMC11011270 DOI: 10.3390/ijms25073649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 04/14/2024] Open
Abstract
Legume crops establish symbiosis with nitrogen-fixing rhizobia for biological nitrogen fixation (BNF), a process that provides a prominent natural nitrogen source in agroecosystems; and efficient nodulation and nitrogen fixation processes require a large amount of phosphorus (P). Here, a role of GmPAP4, a nodule-localized purple acid phosphatase, in BNF and seed yield was functionally characterized in whole transgenic soybean (Glycine max) plants under a P-limited condition. GmPAP4 was specifically expressed in the infection zones of soybean nodules and its expression was greatly induced in low P stress. Altered expression of GmPAP4 significantly affected soybean nodulation, BNF, and yield under the P-deficient condition. Nodule number, nodule fresh weight, nodule nitrogenase, APase activities, and nodule total P content were significantly increased in GmPAP4 overexpression (OE) lines. Structural characteristics revealed by toluidine blue staining showed that overexpression of GmPAP4 resulted in a larger infection area than wild-type (WT) control. Moreover, the plant biomass and N and P content of shoot and root in GmPAP4 OE lines were also greatly improved, resulting in increased soybean yield in the P-deficient condition. Taken together, our results demonstrated that GmPAP4, a purple acid phosphatase, increased P utilization efficiency in nodules under a P-deficient condition and, subsequently, enhanced symbiotic BNF and seed yield of soybean.
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Affiliation(s)
- Xi Sun
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Huantao Zhang
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Zhanwu Yang
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Xinzhu Xing
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Zhao Fu
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Xihuan Li
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Youbin Kong
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Wenlong Li
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Hui Du
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Caiying Zhang
- State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071000, China; (X.S.); (H.Z.); (Z.Y.); (X.X.); (Z.F.); (X.L.); (Y.K.); (W.L.)
- North China Key Laboratory for Crop Germplasm Resources of Education Ministry, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
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Yang Y, Xu N, Zhang Z, Lei C, Chen B, Qin G, Qiu D, Lu T, Qian H. Deciphering Microbial Community and Nitrogen Fixation in the Legume Rhizosphere. J Agric Food Chem 2024; 72:5659-5670. [PMID: 38442360 DOI: 10.1021/acs.jafc.3c09160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
Nitrogen is the most limiting factor in crop production. Legumes establish a symbiotic relationship with rhizobia and enhance nitrogen fixation. We analyzed 1,624 rhizosphere 16S rRNA gene samples and 113 rhizosphere metagenomic samples from three typical legumes and three non-legumes. The rhizosphere microbial community of the legumes had low diversity and was enriched with nitrogen-cycling bacteria (Sphingomonadaceae, Xanthobacteraceae, Rhizobiaceae, and Bacillaceae). Furthermore, the rhizosphere microbiota of legumes exhibited a high abundance of nitrogen-fixing genes, reflecting a stronger nitrogen-fixing potential, and Streptomycetaceae and Nocardioidaceae were the predominant nitrogen-fixing bacteria. We also identified helper bacteria and confirmed through metadata analysis and a pot experiment that the synthesis of riboflavin by helper bacteria is the key factor in promoting nitrogen fixation. Our study emphasizes that the construction of synthetic communities of nitrogen-fixing bacteria and helper bacteria is crucial for the development of efficient nitrogen-fixing microbial fertilizers.
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Affiliation(s)
- Yaohui Yang
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, P. R. China
| | - Nuohan Xu
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, P. R. China
| | - Zhenyan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, P. R. China
| | - Chaotang Lei
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, P. R. China
| | - Bingfeng Chen
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, P. R. China
| | - Guoyan Qin
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, P. R. China
| | - Danyan Qiu
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, P. R. China
| | - Tao Lu
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, P. R. China
| | - Haifeng Qian
- College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, P. R. China
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Pi HW, Chiang YR, Li WH. Mapping Geological Events and Nitrogen Fixation Evolution Onto the Timetree of the Evolution of Nitrogen-Fixation Genes. Mol Biol Evol 2024; 41:msae023. [PMID: 38319744 PMCID: PMC10881105 DOI: 10.1093/molbev/msae023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/17/2023] [Accepted: 11/21/2023] [Indexed: 02/08/2024] Open
Abstract
Nitrogen is essential for all organisms, but biological nitrogen fixation (BNF) occurs only in a small fraction of prokaryotes. Previous studies divided nitrogenase-gene-carrying prokaryotes into Groups I to IV and provided evidence that BNF first evolved in bacteria. This study constructed a timetree of the evolution of nitrogen-fixation genes and estimated that archaea evolved BNF much later than bacteria and that nitrogen-fixing cyanobacteria evolved later than 1,900 MYA, considerably younger than the previous estimate of 2,200 MYA. Moreover, Groups III and II/I diverged ∼2,280 MYA, after the Kenorland supercontinent breakup (∼2,500-2,100 MYA) and the Great Oxidation Event (∼2,400-2,100 MYA); Groups III and Vnf/Anf diverged ∼2,086 MYA, after the Yarrabubba impact (∼2,229 MYA); and Groups II and I diverged ∼1,920 MYA, after the Vredefort impact (∼2,023 MYA). In summary, this study provided a timescale of BNF events and discussed the possible effects of geological events on BNF evolution.
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Affiliation(s)
- Hong-Wei Pi
- Biodiversity Research Center, Academia Sinica, Taipei 115201, Taiwan
- Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung 40227, Taiwan
| | - Yin-Ru Chiang
- Biodiversity Research Center, Academia Sinica, Taipei 115201, Taiwan
| | - Wen-Hsiung Li
- Biodiversity Research Center, Academia Sinica, Taipei 115201, Taiwan
- Department of Ecology and Evolution, University of Chicago, Chicago, IL 60637, USA
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Nshimiyimana JB, Zhao K, Wang W, Kong W. Diazotrophic abundance and community structure associated with three meadow plants on the Qinghai-Tibet Plateau. Front Microbiol 2024; 14:1292860. [PMID: 38260880 PMCID: PMC10801153 DOI: 10.3389/fmicb.2023.1292860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 12/20/2023] [Indexed: 01/24/2024] Open
Abstract
Symbiotic diazotrophs form associations with legumes and substantially fix nitrogen into soils. However, grasslands on the Qinghai-Tibet Plateau are dominated by non-legume plants, such as Kobresia tibetica. Herein, we investigated the diazotrophic abundance, composition, and community structure in the soils and roots of three plants, non-legume K. tibetica and Kobresia humilis and the legume Oxytropis ochrocephala, using molecular methods targeting nifH gene. Diazotrophs were abundantly observed in both bulk and rhizosphere soils, as well as in roots of all three plants, but their abundance varied with plant type and soil. In both bulk and rhizosphere soils, K. tibetica showed the highest diazotroph abundance, whereas K. humilis had the lowest. In roots, O. ochrocephala and K. humilis showed the highest and the lowest diazotroph abundance, respectively. The bulk and rhizosphere soils exhibited similar diazotrophic community structure in both O. ochrocephala and K. tibetica, but were substantially distinct from the roots in both plants. Interestingly, the root diazotrophic community structures in legume O. ochrocephala and non-legume K. tibetica were similar. Diazotrophs in bulk and rhizosphere soils were more diverse than those in the roots of three plants. Rhizosphere soils of K. humilis were dominated by Actinobacteria, while rhizosphere soils and roots of K. tibetica were dominated by Verrumicrobia and Proteobacteria. The O. ochrocephala root diazotrophs were dominated by Alphaproteobacteria. These findings indicate that free-living diazotrophs abundantly and diversely occur in grassland soils dominated by non-legume plants, suggesting that these diazotrophs may play important roles in fixing nitrogen into soils on the plateau.
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Affiliation(s)
- Jean Bosco Nshimiyimana
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- Department of Life and Geography Sciences, Qinghai Normal University, Xining, China
| | - Kang Zhao
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- Department of Life and Geography Sciences, Qinghai Normal University, Xining, China
| | - Wenying Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
- Key Laboratory of Biodiversity Formation Mechanism and Comprehensive Utilization in Qinghai Tibet Plateau, Xining, China
| | - Weidong Kong
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- Department of Life and Geography Sciences, Qinghai Normal University, Xining, China
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Yu L, Jia R, Liu S, Li S, Zhong S, Liu G, Zeng RJ, Rensing C, Zhou S. Ferrihydrite-mediated methanotrophic nitrogen fixation in paddy soil under hypoxia. ISME Commun 2024; 4:ycae030. [PMID: 38524761 PMCID: PMC10960957 DOI: 10.1093/ismeco/ycae030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/21/2024] [Accepted: 02/29/2024] [Indexed: 03/26/2024]
Abstract
Biological nitrogen fixation (BNF) by methanotrophic bacteria has been shown to play an important role in maintaining fertility. However, this process is still limited to aerobic methane oxidation with sufficient oxygen. It has remained unknown whether and how methanotrophic BNF proceeds in hypoxic environments. Herein, we incubated paddy soils with a ferrihydrite-containing mineral salt medium to enrich methanotrophic bacteria in the presence of methane (20%, v/v) under oxygen constraints (0.27%, v/v). The resulting microcosms showed that ferrihydrite-dependent aerobic methane oxidation significantly contributed (81%) to total BNF, increasing the 15N fixation rate by 13-fold from 0.02 to 0.28 μmol 15N2 (g dry weight soil) -1 d-1. BNF was reduced by 97% when ferrihydrite was omitted, demonstrating the involvement of ferrihydrite in methanotrophic BNF. DNA stable-isotope probing indicated that Methylocystis, Methylophilaceae, and Methylomicrobium were the dominant methanotrophs/methylotrophs that assimilated labeled isotopes (13C or 15N) into biomass. Metagenomic binning combined with electrochemical analysis suggested that Methylocystis and Methylophilaceae had the potential to perform methane-induced BNF and likely utilized riboflavin and c-type cytochromes as electron carriers for ferrihydrite reduction. It was concluded that ferrihydrite mediated methanotrophic BNF by methanotrophs/methylotrophs solely or in conjunction with iron-reducing bacteria. Overall, this study revealed a previously overlooked yet pronounced coupling of iron-dependent aerobic methane oxidation to BNF and improves our understanding of methanotrophic BNF in hypoxic zones.
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Affiliation(s)
- Linpeng Yu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Rong Jia
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest China, Ministry of Education, Sichuan Normal University, Chengdu, Sichuan Province 610066, China
| | - Shiqi Liu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shuan Li
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Sining Zhong
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Guohong Liu
- Agricultural Bio-resources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Raymond Jianxiong Zeng
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Christopher Rensing
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Amoako FK, Sulieman S, Mühling KH. Mineral and Carbon Metabolic Adjustments in Nodules of Symbiotically Grown Faba Bean ( Vicia faba L.) Varieties in Response to Organic Phosphorus Supplementation. Plants (Basel) 2023; 12:3888. [PMID: 38005785 PMCID: PMC10675292 DOI: 10.3390/plants12223888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/02/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023]
Abstract
Phosphorus (P) is a major limiting factor for legume and symbiotic nitrogen fixation (SNF). Although overall adaptations of legumes to P supplementation have been extensively studied in connection with inorganic P, little information is currently available regarding nodulation or SNF responses to organic P (Po) in hydroponics. We investigated the mineral and carbon metabolism of Po-induced nodules of two contrasting faba bean varieties grown hydroponically under inorganic P (Pi), viz., in P-deficient (2 µM KH2PO4, -Pi), sufficient-P (200 µM KH2PO4, +Pi), and phytic acid (200 µM, Po) conditions, and were inoculated with Rhizobium leguminosarum bv. viciae 3841 and grown for 30 days. The results consistently reveal similar growth and biomass partitioning patterns between +Pi and Po, with both varying substantially from -Pi. In comparison, +Pi and Po observed equivalent accumulations of overall elemental P concentrations, with both increasing by 114 and 119%, respectively, relative to -Pi. A principal component analysis on metabolites showed a clear separation of the -Pi treatment from the others, with +Pi and Po correlating closely together, highlighting the nonsignificant differences between them. Additionally, the δ15N abundance of shoots, roots, and nodules was not significantly different between treatments and varieties and exhibited negative δ15N signatures for all tissues. Our study provides a novel perspective on mineral and carbon metabolism and their regulation of the growth, functioning, and reprogramming of nodules upon phytate supply.
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Affiliation(s)
| | | | - Karl H. Mühling
- Institute of Plant Nutrition and Soil Science, Kiel University, Hermann-Rodewald-Straße 2, 24118 Kiel, Germany; (F.K.A.); (S.S.)
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Rosa-Núñez E, Echavarri-Erasun C, Armas AM, Escudero V, Poza-Carrión C, Rubio LM, González-Guerrero M. Iron Homeostasis in Azotobacter vinelandii. Biology (Basel) 2023; 12:1423. [PMID: 37998022 PMCID: PMC10669500 DOI: 10.3390/biology12111423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/07/2023] [Accepted: 11/10/2023] [Indexed: 11/25/2023]
Abstract
Iron is an essential nutrient for all life forms. Specialized mechanisms exist in bacteria to ensure iron uptake and its delivery to key enzymes within the cell, while preventing toxicity. Iron uptake and exchange networks must adapt to the different environmental conditions, particularly those that require the biosynthesis of multiple iron proteins, such as nitrogen fixation. In this review, we outline the mechanisms that the model diazotrophic bacterium Azotobacter vinelandii uses to ensure iron nutrition and how it adapts Fe metabolism to diazotrophic growth.
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Affiliation(s)
- Elena Rosa-Núñez
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA/CSIC), Campus de Montegancedo UPM, Crta. M-40 km 38, 28223 Madrid, Spain; (E.R.-N.); (C.E.-E.); (A.M.A.); (C.P.-C.); (L.M.R.)
- Escuela Técnica de Ingeniería Agraria, Alimentaria, y de Biosistemas, Universidad Politécnica de Madrid, Avda. Puerta de Hierro, 2, 28040 Madrid, Spain
| | - Carlos Echavarri-Erasun
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA/CSIC), Campus de Montegancedo UPM, Crta. M-40 km 38, 28223 Madrid, Spain; (E.R.-N.); (C.E.-E.); (A.M.A.); (C.P.-C.); (L.M.R.)
- Escuela Técnica de Ingeniería Agraria, Alimentaria, y de Biosistemas, Universidad Politécnica de Madrid, Avda. Puerta de Hierro, 2, 28040 Madrid, Spain
| | - Alejandro M. Armas
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA/CSIC), Campus de Montegancedo UPM, Crta. M-40 km 38, 28223 Madrid, Spain; (E.R.-N.); (C.E.-E.); (A.M.A.); (C.P.-C.); (L.M.R.)
| | - Viviana Escudero
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA/CSIC), Campus de Montegancedo UPM, Crta. M-40 km 38, 28223 Madrid, Spain; (E.R.-N.); (C.E.-E.); (A.M.A.); (C.P.-C.); (L.M.R.)
| | - César Poza-Carrión
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA/CSIC), Campus de Montegancedo UPM, Crta. M-40 km 38, 28223 Madrid, Spain; (E.R.-N.); (C.E.-E.); (A.M.A.); (C.P.-C.); (L.M.R.)
| | - Luis M. Rubio
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA/CSIC), Campus de Montegancedo UPM, Crta. M-40 km 38, 28223 Madrid, Spain; (E.R.-N.); (C.E.-E.); (A.M.A.); (C.P.-C.); (L.M.R.)
| | - Manuel González-Guerrero
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA/CSIC), Campus de Montegancedo UPM, Crta. M-40 km 38, 28223 Madrid, Spain; (E.R.-N.); (C.E.-E.); (A.M.A.); (C.P.-C.); (L.M.R.)
- Escuela Técnica de Ingeniería Agraria, Alimentaria, y de Biosistemas, Universidad Politécnica de Madrid, Avda. Puerta de Hierro, 2, 28040 Madrid, Spain
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9
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NIANG D, GUEDDOU A, NIANG N, NZEPANG D, SAMBOU A, DIOUF A, ZAIYA AZ, CISSOKO M, GULLY D, NGUEPJOP JR, SVISTOONOFF S, FONCEKA D, HOCHER V, DIOUF D, FALL S, TISA LS. Permanent draft genome sequence of Bradyrhizobium vignae, strain ISRA 400, an elite nitrogen-fixing bacterium, isolated from the groundnut growing area in Senegal. J Genomics 2023; 11:52-57. [PMID: 37915957 PMCID: PMC10615618 DOI: 10.7150/jgen.88302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/12/2023] [Indexed: 11/03/2023] Open
Abstract
A new Bradyrhizobium vignae strain called ISRA400 was isolated from groundnut (Arachis hypogaea L.) root nodules obtained by trapping the bacteria from soil samples collected in the Senegalese groundnut basin. In this study, we present the draft genome sequence of this strain ISRA400, which spans approximatively 7.9 Mbp and exhibits a G+C content of 63.4%. The genome analysis revealed the presence of 48 tRNA genes and one rRNA operon (16S, 23S, and 5S). The nodulation test revealed that this strain ISRA400 significantly improves the nodulation parameters and chlorophyll content of the Arachis hypogaea variety Fleur11. These findings suggest the potential of Bradyrhizobium vignae strain ISRA400 as an effective symbiotic partner for improving the growth and productivity of groundnut crop.
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Affiliation(s)
- Diariatou NIANG
- Université Cheikh Anta Diop (UCAD/FST), Département de Biologie Végétale, École doctorale Sciences de la Vie, de la Santé et de l'Environnement (EDSEV), B.P.: 5005 Dakar-Fann, Senegal
- Institut Sénégalais de Recherche Agricole (ISRA), Laboratoire National de Recherches sur la Productions Végétales (LNRPV), Campus ISRA-IRD de Bel air, Dakar
- Laboratoire Commun de Microbiologie (LCM: IRD - ISRA - UCAD), B. P. 3120, Campus ISRA-IRD de Bel air, Dakar
| | - Abdellatif GUEDDOU
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, New Hampshire, USA
| | - Nogaye NIANG
- Université Cheikh Anta Diop (UCAD/FST), Département de Biologie Végétale, École doctorale Sciences de la Vie, de la Santé et de l'Environnement (EDSEV), B.P.: 5005 Dakar-Fann, Senegal
- Institut Sénégalais de Recherche Agricole (ISRA), Laboratoire National de Recherches sur la Productions Végétales (LNRPV), Campus ISRA-IRD de Bel air, Dakar
- Laboratoire Commun de Microbiologie (LCM: IRD - ISRA - UCAD), B. P. 3120, Campus ISRA-IRD de Bel air, Dakar
| | - Darius NZEPANG
- Université Cheikh Anta Diop (UCAD/FST), Département de Biologie Végétale, École doctorale Sciences de la Vie, de la Santé et de l'Environnement (EDSEV), B.P.: 5005 Dakar-Fann, Senegal
- Institut Sénégalais de Recherche Agricole (ISRA), Laboratoire National de Recherches sur la Productions Végétales (LNRPV), Campus ISRA-IRD de Bel air, Dakar
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, New Hampshire, USA
| | - Aissatou SAMBOU
- Institut Sénégalais de Recherche Agricole (ISRA), Centre d'Etudes Régional pour l'Amélioration de l'Adaptation à la Sécheresse, CERAAS - Route de Khombole, BP3320 Thiès, Senegal
| | - Adama DIOUF
- Université Cheikh Anta Diop (UCAD/FST), Département de Biologie Végétale, École doctorale Sciences de la Vie, de la Santé et de l'Environnement (EDSEV), B.P.: 5005 Dakar-Fann, Senegal
- Laboratoire Commun de Microbiologie (LCM: IRD - ISRA - UCAD), B. P. 3120, Campus ISRA-IRD de Bel air, Dakar
| | - Arlette Z ZAIYA
- Laboratoire Commun de Microbiologie (LCM: IRD - ISRA - UCAD), B. P. 3120, Campus ISRA-IRD de Bel air, Dakar
- Institut Sénégalais de Recherche Agricole (ISRA), Centre d'Etudes Régional pour l'Amélioration de l'Adaptation à la Sécheresse, CERAAS - Route de Khombole, BP3320 Thiès, Senegal
- Present address: Institute of Agricultural Research for Development (IRAD), Yaounde, Cameroon
| | - Maimouna CISSOKO
- Laboratoire Commun de Microbiologie (LCM: IRD - ISRA - UCAD), B. P. 3120, Campus ISRA-IRD de Bel air, Dakar
- Institut de Recherche pour le Développement (IRD), UMR PHIM IRD/INRAE/CIRAD/U.Montpellier/Institut Agro , Montpellier, France
| | - Djamel GULLY
- Institut de Recherche pour le Développement (IRD), UMR PHIM IRD/INRAE/CIRAD/U.Montpellier/Institut Agro , Montpellier, France
| | - Joel-Romaric NGUEPJOP
- Institut Sénégalais de Recherche Agricole (ISRA), Centre d'Etudes Régional pour l'Amélioration de l'Adaptation à la Sécheresse, CERAAS - Route de Khombole, BP3320 Thiès, Senegal
- Institut de Recherche pour le Développement (IRD), UMR PHIM IRD/INRAE/CIRAD/U.Montpellier/Institut Agro , Montpellier, France
- CIRAD, UMRAGAP, CIRAD/Univ Montpellier/ INRAE, Institut Agro, F-34398 Montpellier, France
| | - Sergio SVISTOONOFF
- Institut de Recherche pour le Développement (IRD), UMR PHIM IRD/INRAE/CIRAD/U.Montpellier/Institut Agro , Montpellier, France
| | - Daniel FONCEKA
- Institut Sénégalais de Recherche Agricole (ISRA), Centre d'Etudes Régional pour l'Amélioration de l'Adaptation à la Sécheresse, CERAAS - Route de Khombole, BP3320 Thiès, Senegal
- Institut de Recherche pour le Développement (IRD), UMR PHIM IRD/INRAE/CIRAD/U.Montpellier/Institut Agro , Montpellier, France
- CIRAD, UMRAGAP, CIRAD/Univ Montpellier/ INRAE, Institut Agro, F-34398 Montpellier, France
| | - Valérie HOCHER
- Laboratoire Commun de Microbiologie (LCM: IRD - ISRA - UCAD), B. P. 3120, Campus ISRA-IRD de Bel air, Dakar
- Institut de Recherche pour le Développement (IRD), UMR PHIM IRD/INRAE/CIRAD/U.Montpellier/Institut Agro , Montpellier, France
| | - Diégane DIOUF
- Laboratoire Commun de Microbiologie (LCM: IRD - ISRA - UCAD), B. P. 3120, Campus ISRA-IRD de Bel air, Dakar
- Université du Sine Saloum El Hadj Ibrahima Niass (USSEIN), UFR Sciences sociales et environnementales, Centre d'Excellence Africain "Agriculture pour la Sécurité Alimentaire et Nutritionnelle" (CEA-AGRISAN), Kaolack
| | - Saliou FALL
- Institut Sénégalais de Recherche Agricole (ISRA), Laboratoire National de Recherches sur la Productions Végétales (LNRPV), Campus ISRA-IRD de Bel air, Dakar
- Laboratoire Commun de Microbiologie (LCM: IRD - ISRA - UCAD), B. P. 3120, Campus ISRA-IRD de Bel air, Dakar
| | - Louis S. TISA
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, New Hampshire, USA
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Oliveira CEDS, Jalal A, Aguilar JV, de Camargos LS, Zoz T, Ghaley BB, Abdel-Maksoud MA, Alarjani KM, AbdElgawad H, Teixeira Filho MCM. Yield, nutrition, and leaf gas exchange of lettuce plants in a hydroponic system in response to Bacillus subtilis inoculation. Front Plant Sci 2023; 14:1248044. [PMID: 37954988 PMCID: PMC10634435 DOI: 10.3389/fpls.2023.1248044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 10/06/2023] [Indexed: 11/14/2023]
Abstract
Inoculation with Bacillus subtilis is a promising approach to increase plant yield and nutrient acquisition. In this context, this study aimed to estimate the B. subtilis concentration that increases yield, gas exchange, and nutrition of lettuce plants in a hydroponic system. The research was carried out in a greenhouse in Ilha Solteira, Brazil. A randomized block design with five replications was adopted. The treatments consisted of B. subtilis concentrations in nutrient solution [0 mL "non-inoculated", 7.8 × 103, 15.6 × 103, 31.2 × 103, and 62.4 × 103 colony forming units (CFU) mL-1 of nutrient solution]. There was an increase of 20% and 19% in number of leaves and 22% and 25% in shoot fresh mass with B. subtilis concentrations of 15.6 × 103 and 31.2 × 103 CFU mL-1 as compared to the non-inoculated plants, respectively. Also, B. subtilis concentration at 31.2 × 103 CFU mL-1 increased net photosynthesis rate by 95%, intercellular CO2 concentration by 30%, and water use efficiency by 67% as compared to the non-inoculated treatments. The concentration of 7.8 × 103 CFU mL-1 improved shoot accumulation of Ca, Mg, and S by 109%, 74%, and 69%, when compared with non-inoculated plants, respectively. Inoculation with B. subtilis at 15.6 × 103 CFU mL-1 provided the highest fresh leaves yield while inoculation at 15.6 × 103 and 31.2 × 103 CFU mL-1 increased shoot fresh mass and number of leaves. Concentrations of 7.8 × 103 and 15.6 × 103 increased shoot K accumulation. The concentrations of 7.8 × 103, 15.6 × 103, and 31.2 × 103 CFU mL-1 increased shoot N accumulation in hydroponic lettuce plants.
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Affiliation(s)
- Carlos Eduardo da Silva Oliveira
- Department of Plant Protection, Rural Engineering and Soils, School of Engineering, São Paulo State University - UNESP-FEIS, Ilha Solteira, São Paulo, Brazil
| | - Arshad Jalal
- Department of Plant Protection, Rural Engineering and Soils, School of Engineering, São Paulo State University - UNESP-FEIS, Ilha Solteira, São Paulo, Brazil
| | - Jailson Vieira Aguilar
- Department of Biology and Zootechnics, Lab of Plant Morphology and Anatomy/Lab Plant Metabolism and Physiology, School of Engineering, São Paulo State University - UNESP-FEIS, Ilha Solteira, São Paulo, Brazil
| | - Liliane Santos de Camargos
- Department of Biology and Zootechnics, Lab of Plant Morphology and Anatomy/Lab Plant Metabolism and Physiology, School of Engineering, São Paulo State University - UNESP-FEIS, Ilha Solteira, São Paulo, Brazil
| | - Tiago Zoz
- Department of Crop Science, State University of Mato Grosso do Sul – UEMS, Mundo Novo, Mato Grosso do Sul, Brazil
| | - Bhim Bahadur Ghaley
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Mostafa A. Abdel-Maksoud
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | | | - Hamada AbdElgawad
- Laboratory for Molecular Plant Physiology and Biotechnology, Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Marcelo Carvalho Minhoto Teixeira Filho
- Department of Plant Protection, Rural Engineering and Soils, School of Engineering, São Paulo State University - UNESP-FEIS, Ilha Solteira, São Paulo, Brazil
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11
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Schmidt H, Gorka S, Seki D, Schintlmeister A, Woebken D. Gold-FISH enables targeted NanoSIMS analysis of plant-associated bacteria. New Phytol 2023; 240:439-451. [PMID: 37381111 PMCID: PMC10962543 DOI: 10.1111/nph.19112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 06/14/2023] [Indexed: 06/30/2023]
Abstract
Bacteria colonize plant roots and engage in reciprocal interactions with their hosts. However, the contribution of individual taxa or groups of bacteria to plant nutrition and fitness is not well characterized due to a lack of in situ evidence of bacterial activity. To address this knowledge gap, we developed an analytical approach that combines the identification and localization of individual bacteria on root surfaces via gold-based in situ hybridization with correlative NanoSIMS imaging of incorporated stable isotopes, indicative of metabolic activity. We incubated Kosakonia strain DS-1-associated, gnotobiotically grown rice plants with 15 N-N2 gas to detect in situ N2 fixation activity. Bacterial cells along the rhizoplane showed heterogeneous patterns of 15 N enrichment, ranging from the natural isotope abundance levels up to 12.07 at% 15 N (average and median of 3.36 and 2.85 at% 15 N, respectively, n = 697 cells). The presented correlative optical and chemical imaging analysis is applicable to a broad range of studies investigating plant-microbe interactions. For example, it enables verification of the in situ metabolic activity of host-associated commercialized strains or plant growth-promoting bacteria, thereby disentangling their role in plant nutrition. Such data facilitate the design of plant-microbe combinations for improvement of crop management.
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Affiliation(s)
- Hannes Schmidt
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaVienna1030Austria
| | - Stefan Gorka
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaVienna1030Austria
- Doctoral School in Microbiology and Environmental ScienceUniversity of ViennaVienna1030Austria
| | - David Seki
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaVienna1030Austria
| | - Arno Schintlmeister
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaVienna1030Austria
- Large‐Instrument Facility for Environmental and Isotope Mass Spectrometry, Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaVienna1030Austria
| | - Dagmar Woebken
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaVienna1030Austria
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12
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Moura FT, Helene LCF, Klepa MS, Ribeiro RA, Nogueira MA, Hungria M. Genomes of two type strains of the Rhizobium tropici group: R. calliandrae CCGE524 T and R. mayense CCGE526 T. Microbiol Resour Announc 2023; 12:e0047223. [PMID: 37540013 PMCID: PMC10508132 DOI: 10.1128/mra.00472-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 06/26/2023] [Indexed: 08/05/2023] Open
Abstract
The genome sequences of two nitrogen-fixing type strains of the Rhizobium tropici group were obtained: Rhizobium calliandrae CCGE524T and R. mayense CCGE526T. Genomic analyses confirmed their taxonomic position and identified three complete sequences of the repABC genes, indicative of three plasmids, one of them carrying symbiotic genes.
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Affiliation(s)
- Fernanda Terezinha Moura
- Department of Biochemistry and Biotechnology, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
- Embrapa Soja, Soil Biotechnology Laboratory, Londrina, Paraná, Brazil
- CAPES, SBN, Brasília, Distrito Federal, Brazil
| | | | - Milena Serenato Klepa
- Embrapa Soja, Soil Biotechnology Laboratory, Londrina, Paraná, Brazil
- CNPq, Brasília, Distrito Federal, Brazil
| | | | - Marco Antonio Nogueira
- Embrapa Soja, Soil Biotechnology Laboratory, Londrina, Paraná, Brazil
- CNPq, Brasília, Distrito Federal, Brazil
| | - Mariangela Hungria
- Department of Biochemistry and Biotechnology, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
- Embrapa Soja, Soil Biotechnology Laboratory, Londrina, Paraná, Brazil
- CNPq, Brasília, Distrito Federal, Brazil
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13
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Sanow S, Kuang W, Schaaf G, Huesgen P, Schurr U, Roessner U, Watt M, Arsova B. Molecular Mechanisms of Pseudomonas-Assisted Plant Nitrogen Uptake: Opportunities for Modern Agriculture. Mol Plant Microbe Interact 2023; 36:536-548. [PMID: 36989040 DOI: 10.1094/mpmi-10-22-0223-cr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Pseudomonas spp. make up 1.6% of the bacteria in the soil and are found throughout the world. More than 140 species of this genus have been identified, some beneficial to the plant. Several species in the family Pseudomonadaceae, including Azotobacter vinelandii AvOP, Pseudomonas stutzeri A1501, Pseudomonas stutzeri DSM4166, Pseudomonas szotifigens 6HT33bT, and Pseudomonas sp. strain K1 can fix nitrogen from the air. The genes required for these reactions are organized in a nitrogen fixation island, obtained via horizontal gene transfer from Klebsiella pneumoniae, Pseudomonas stutzeri, and Azotobacter vinelandii. Today, this island is conserved in Pseudomonas spp. from different geographical locations, which, in turn, have evolved to deal with different geo-climatic conditions. Here, we summarize the molecular mechanisms behind Pseudomonas-driven plant growth promotion, with particular focus on improving plant performance at limiting nitrogen (N) and improving plant N content. We describe Pseudomonas-plant interaction strategies in the soil, noting that the mechanisms of denitrification, ammonification, and secondary metabolite signaling are only marginally explored. Plant growth promotion is dependent on the abiotic conditions and differs at sufficient and deficient N. The molecular controls behind different plant responses are not fully elucidated. We suggest that superposition of transcriptome, proteome, and metabolome data and their integration with plant phenotype development through time will help fill these gaps. The aim of this review is to summarize the knowledge behind Pseudomonas-driven nitrogen fixation and to point to possible agricultural solutions. [Formula: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.
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Affiliation(s)
- Stefan Sanow
- Institute for Bio- and Geosciences, Plant Sciences (IBG-2), Forschungszentrum Juelich GmbH, Germany
- School of BioSciences, Faculty of Science, The University of Melbourne, Parkville, 3010 Victoria, Australia
| | - Weiqi Kuang
- College of life and Environmental Sciences, Hunan University of Arts and Science, China
| | - Gabriel Schaaf
- Institute of Crop Science and Resource Conservation, University of Bonn, 53115 Bonn, Germany
| | - Pitter Huesgen
- Central institute for Engineering, Electronics and Analytics (ZEA-3), Forschungszentrum Juelich GmbH, Germany
| | - Ulrich Schurr
- Institute for Bio- and Geosciences, Plant Sciences (IBG-2), Forschungszentrum Juelich GmbH, Germany
| | - Ute Roessner
- Research School of Biology, The Australian National University, Acton, 2601 Australian Capital Territory, Australia
| | - Michelle Watt
- School of BioSciences, Faculty of Science, The University of Melbourne, Parkville, 3010 Victoria, Australia
| | - Borjana Arsova
- Institute for Bio- and Geosciences, Plant Sciences (IBG-2), Forschungszentrum Juelich GmbH, Germany
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14
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Li M, Zhang P, Guo Z, Cao W, Gao L, Li Y, Tian CF, Chen Q, Shen Y, Ren F, Rui Y, White JC, Lynch I. Molybdenum Nanofertilizer Boosts Biological Nitrogen Fixation and Yield of Soybean through Delaying Nodule Senescence and Nutrition Enhancement. ACS Nano 2023; 17:14761-14774. [PMID: 37498282 PMCID: PMC10416561 DOI: 10.1021/acsnano.3c02783] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 07/25/2023] [Indexed: 07/28/2023]
Abstract
Soybean (Glycine max) is a crop of global significance and has low reliance on N fertilizers due to its biological nitrogen fixation (BNF) capacity, which harvests ambient N2 as a critical ecosystem service. BNF can be severely compromised by abiotic stresses. Enhancing BNF is increasingly important not only to alleviate global food insecurity but also to reduce the environmental impact of agriculture by decreasing chemical fertilizer inputs. However, this has proven challenging using current genetic modification or bacterial nodulation methods. Here, we demonstrate that a single application of a low dose (10 mg/kg) of molybdenum disulfide nanoparticles (MoS2 NPs) can enhance soybean BNF and grain yield by 30%, compared with conventional molybdate fertilizer. Unlike molybdate, MoS2 NPs can more sustainably release Mo, which then is effectively incorporated as a cofactor for the synthesis of nitrogenase and molybdenum-based enzymes that subsequently enhance BNF. Sulfur is also released sustainably and incorporated into biomolecule synthesis, particularly in thiol-containing antioxidants. The superior antioxidant enzyme activity of MoS2 NPs, together with the thiol compounds, protect the nodules from reactive oxygen species (ROS) damage, delay nodule aging, and maintain the BNF function for a longer term. The multifunctional nature of MoS2 NPs makes them a highly effective strategy to enhance plant tolerance to abiotic stresses. Given that the physicochemical properties of nanomaterials can be readily modulated, material performance (e.g., ROS capturing capacity) can be further enhanced by several synthesis strategies. This study thus demonstrates that nanotechnology can be an efficient and sustainable approach to enhancing BNF and crop yield under abiotic stress and combating global food insecurity.
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Affiliation(s)
- Mingshu Li
- College
of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
- Department
of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Peng Zhang
- Department
of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- School
of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Zhiling Guo
- School
of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Weidong Cao
- Institute
of Agricultural Resources and Regional Planning, Chinese Academy of
Agricultural Sciences, Beijing 100081, China
| | - Li Gao
- State
Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of
Agricultural Sciences, Beijing 100193, China
| | - Yuanbo Li
- College
of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Chang Fu Tian
- State
Key
Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Qing Chen
- College
of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Yunze Shen
- National
Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing, 100094, China
| | - Fazheng Ren
- Key
Laboratory of Precision Nutrition and Food Quality, China Agricultural University, Beijing 100083, China
| | - Yukui Rui
- College
of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Jason C. White
- The
Connecticut Agricultural Experiment Station, New Haven, Connecticut 06504, United States
| | - Iseult Lynch
- School
of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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15
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Alves MJG, Mendonça JJ, Vitalino GM, Oliveira JP, Carvalho EX, Fracetto FJC, Fracetto GGM, Lira Junior MA. Screening Digitaria eriantha cv. Suvernola Endophytic Bacteria for Maize Growth Promotion. Plants (Basel) 2023; 12:2589. [PMID: 37514205 PMCID: PMC10385894 DOI: 10.3390/plants12142589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023]
Abstract
The search for sustainable agriculture has increased interest in using endophytic bacteria to reduce fertilizer use and increase stress resilience. Stress-adapted plants are a potential source of these bacteria. Some species of these plants have not yet been evaluated for this, such as pangolão grass, from which we considered endophytic bacteria as potential plant growth promoters. Bacteria from the root, colm, leaves, and rhizospheric soil were isolated, and 132 strains were evaluated for their in vitro biological nitrogen fixation, IAA and siderophores production, and phosphate solubilization. Each mechanism was also assessed under low N availability, water stress, and low-solubility Fe and P sources in maize greenhouse experiments. All strains synthesized IAA; 63 grew on N-free media, 114 synthesized siderophores, and 46 solubilized P, while 19 presented all four mechanisms. Overall, these strains had better performance than commercial inoculant in all experiments. Still, in vitro responses were not good predictors of in vivo effects, which indicates that the former should not be used for strain selection, since this could lead to not testing strains with good plant growth promotion potential. Their heterologous growth promotion in maize reinforces the potential of stress-adapted plant species as potential sources of strains for inoculants.
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Affiliation(s)
- Michelle J G Alves
- Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife 52171-900, Brazil
| | - Johny Jesus Mendonça
- Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife 52171-900, Brazil
- Programa de Pós-Graduação em Ciência do Solo, Universidade Federal do Rio Grande do Sul, Porto Alegre 91501-970, Brazil
| | - Gisely Moreira Vitalino
- Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife 52171-900, Brazil
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16
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Housh AB, Noel R, Powell A, Waller S, Wilder SL, Sopko S, Benoit M, Powell G, Schueller MJ, Ferrieri RA. Studies Using Mutant Strains of Azospirillum brasilense Reveal That Atmospheric Nitrogen Fixation and Auxin Production Are Light Dependent Processes. Microorganisms 2023; 11:1727. [PMID: 37512900 PMCID: PMC10383956 DOI: 10.3390/microorganisms11071727] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 07/30/2023] Open
Abstract
As the use of microbial inoculants in agriculture rises, it becomes important to understand how the environment may influence microbial ability to promote plant growth. This work examines whether there are light dependencies in the biological functions of Azospirillum brasilense, a commercialized prolific grass-root colonizer. Though classically defined as non-phototrophic, A. brasilense possesses photoreceptors that could perceive light conducted through its host's roots. Here, we examined the light dependency of atmospheric biological nitrogen fixation (BNF) and auxin biosynthesis along with supporting processes including ATP biosynthesis, and iron and manganese uptake. Functional mutants of A. brasilense were studied in light and dark environments: HM053 (high BNF and auxin production), ipdC (capable of BNF, deficient in auxin production), and FP10 (capable of auxin production, deficient in BNF). HM053 exhibited the highest rate of nitrogenase activity with the greatest light dependency comparing iterations in light and dark environments. The ipdC mutant showed similar behavior with relatively lower nitrogenase activity observed, while FP10 did not show a light dependency. Auxin biosynthesis showed strong light dependencies in HM053 and FP10 strains, but not for ipdC. Ferrous iron is involved in BNF, and a light dependency was observed for microbial 59Fe2+ uptake in HM053 and ipdC, but not FP10. Surprisingly, a light dependency for 52Mn2+ uptake was only observed in ipdC. Finally, ATP biosynthesis was sensitive to light across all three mutants favoring blue light over red light compared to darkness with observed ATP levels in descending order for HM053 > ipdC > FP10.
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Affiliation(s)
- Alexandra Bauer Housh
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
- Chemistry Department, University of Missouri, Columbia, MO 65211, USA
- Interdisciplinary Plant Group, University of Missouri, Columbia, MO 65211, USA
| | - Randi Noel
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
- Interdisciplinary Plant Group, University of Missouri, Columbia, MO 65211, USA
- Division of Plant Science & Technology, University of Missouri, Columbia, MO 65211, USA
| | - Avery Powell
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
- Interdisciplinary Plant Group, University of Missouri, Columbia, MO 65211, USA
- School of Natural Resources, University of Missouri, Columbia, MO 65211, USA
| | - Spenser Waller
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
- Interdisciplinary Plant Group, University of Missouri, Columbia, MO 65211, USA
- School of Natural Resources, University of Missouri, Columbia, MO 65211, USA
| | - Stacy L Wilder
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
| | - Stephanie Sopko
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, USA
| | - Mary Benoit
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
- Division of Plant Science & Technology, University of Missouri, Columbia, MO 65211, USA
| | - Garren Powell
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, USA
| | - Michael J Schueller
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
- Chemistry Department, University of Missouri, Columbia, MO 65211, USA
| | - Richard A Ferrieri
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA
- Chemistry Department, University of Missouri, Columbia, MO 65211, USA
- Interdisciplinary Plant Group, University of Missouri, Columbia, MO 65211, USA
- Division of Plant Science & Technology, University of Missouri, Columbia, MO 65211, USA
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17
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Montes-Luz B, Conrado AC, Ellingsen JK, Monteiro RA, de Souza EM, Stacey G. Acetylene Reduction Assay: A Measure of Nitrogenase Activity in Plants and Bacteria. Curr Protoc 2023; 3:e766. [PMID: 37196102 DOI: 10.1002/cpz1.766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Nitrogen is one of the most abundant elements in the biosphere, but its gaseous form is not biologically available to many organisms, including plants and animals. Diazotrophic microorganisms can convert atmospheric nitrogen into ammonia, a form that can be absorbed by plants in a process called biological nitrogen fixation (BNF). BNF is catalyzed by the enzyme nitrogenase, which not only reduces N2 to NH3 , but also reduces other substrates such as acetylene. The acetylene reduction assay (ARA) can be used to measure nitrogenase activity in diazotrophic organisms, either in symbiotic associations or in their free-living state. The technique uses gas chromatography to measure the reduction of acetylene to ethylene by nitrogenase in a simple, quick, and inexpensive manner. Here, we demonstrate how to: prepare nodulated soybean plants and culture free-living Azospirillum brasilense for the ARA, use the gas chromatograph to detect the ethylene formed, and calculate the nitrogenase activity based on the peaks generated by the chromatograph. The methods shown here using example organisms can be easily adapted to other nodulating plants and diazotrophic bacteria. © 2023 Wiley Periodicals LLC. Basic Protocol 1: Acetylene reduction assay in root nodules Basic Protocol 2: Acetylene reduction assay using diazotrophic bacteria Basic Protocol 3: Calculation of nitrogenase activity Support Protocol 1: Production of acetylene from calcium carbide Support Protocol 2: Calibration of the gas chromatograph Support Protocol 3: Total protein quantification.
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Affiliation(s)
- Bruna Montes-Luz
- Division of Plant Science & Technology, University of Missouri, Columbia, Missouri
| | | | - Jared K Ellingsen
- Division of Plant Science & Technology, University of Missouri, Columbia, Missouri
| | | | | | - Gary Stacey
- Division of Plant Science & Technology, University of Missouri, Columbia, Missouri
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18
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Ahmed N, Ishfaq M, Ali G. Genetic engineering for enhanced biological nitrogen fixation in cereal crops. Trends Biotechnol 2023; 41:473-475. [PMID: 36344382 DOI: 10.1016/j.tibtech.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 10/21/2022] [Indexed: 11/06/2022]
Abstract
Enhancing biological nitrogen (N) fixation in cereal crops has been a long-sought objective. Recently, Yan et al. identified plant compounds that induce biofilm production of diazotrophic bacteria and then performed genetic engineering in order to improve nitrogen fixation in rice plants. These findings hold promise for sustainable agriculture.
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Affiliation(s)
- Nasim Ahmed
- Agricultural Biotechnological Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), College of Pakistan Institute of Engineering and Applied Sciences, Faisalabad, Pakistan; Department of Biotechnology, The University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan.
| | - Muhammad Ishfaq
- Department of Agronomy, The University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Ghazanfar Ali
- Department of Biotechnology, The University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan
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19
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Guo K, Yang J, Yu N, Luo L, Wang E. Biological nitrogen fixation in cereal crops: Progress, strategies, and perspectives. Plant Commun 2023; 4:100499. [PMID: 36447432 PMCID: PMC10030364 DOI: 10.1016/j.xplc.2022.100499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 11/07/2022] [Accepted: 11/28/2022] [Indexed: 05/04/2023]
Abstract
Nitrogen is abundant in the atmosphere but is generally the most limiting nutrient for plants. The inability of many crop plants, such as cereals, to directly utilize freely available atmospheric nitrogen gas means that their growth and production often rely heavily on the application of chemical fertilizers, which leads to greenhouse gas emissions and the eutrophication of water. By contrast, legumes gain access to nitrogen through symbiotic association with rhizobia. These bacteria convert nitrogen gas into biologically available ammonia in nodules through a process termed symbiotic biological nitrogen fixation, which plays a decisive role in ecosystem functioning. Engineering cereal crops that can fix nitrogen like legumes or associate with nitrogen-fixing microbiomes could help to avoid the problems caused by the overuse of synthetic nitrogen fertilizer. With the development of synthetic biology, various efforts have been undertaken with the aim of creating so-called "N-self-fertilizing" crops capable of performing autonomous nitrogen fixation to avoid the need for chemical fertilizers. In this review, we briefly summarize the history and current status of engineering N-self-fertilizing crops. We also propose several potential biotechnological approaches for incorporating biological nitrogen fixation capacity into non-legume plants.
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Affiliation(s)
- Kaiyan Guo
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China; National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200032, China
| | - Jun Yang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200032, China
| | - Nan Yu
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China.
| | - Li Luo
- School of Life Sciences, Shanghai Key Laboratory of Bioenergy Crops, Shanghai University, Shanghai 200444, China.
| | - Ertao Wang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200032, China.
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20
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Zhang J, Wang N, Li S, Peng S, Andrews M, Zhang X, Zhang Y, Yu H, Song J, Chen W, Wang E, Li Y. Bradyrhizobium zhengyangense sp. nov., isype strains of the most closely related species ofolated from effective nodules of Arachis hypogaea L. in central China. Int J Syst Evol Microbiol 2023; 73. [PMID: 36951917 DOI: 10.1099/ijsem.0.005723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023] Open
Affiliation(s)
- Junjie Zhang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, Henan Province, 450000, PR China
- Collaborative Innovation Center for Food Production and Safety of Henan Province, Zhengzhou 450002, Henan Province, PR China
| | - Nan Wang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, Henan Province, 450000, PR China
| | - Shuo Li
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, Henan Province, 450000, PR China
| | - Shanshan Peng
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, Henan Province, 450000, PR China
| | - Mitchell Andrews
- Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand
| | - Xiaoxia Zhang
- Agricultural Cultural Collection of China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100080, PR China
| | - Yanming Zhang
- Chinese National Human Genome Center, Beijing/SinoGenoMax Co., Ltd. 100176, Beijing, PR China
| | - Hui Yu
- Zhengyang Peanut Research Institute, Zhengyang 463600, PR China
| | - Jiangchun Song
- Nanyang Academy of Agricultural Sciences, Nanyang, Henan Province, 473000, PR China
| | - Wenfeng Chen
- College of Biological Sciences, Rhizobium Research Center, China Agricultural University, Beijing 100193, PR China
| | - Entao Wang
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, C.P. 11340, Ciudad de México, Mexico
| | - Youguo Li
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei Province 430070, PR China
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21
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Xavier GR, Jesus EDC, Dias A, Coelho MRR, Molina YC, Rumjanek NG. Contribution of Biofertilizers to Pulse Crops: From Single-Strain Inoculants to New Technologies Based on Microbiomes Strategies. Plants (Basel) 2023; 12:954. [PMID: 36840302 PMCID: PMC9962295 DOI: 10.3390/plants12040954] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
Pulses provide distinct health benefits due to their low fat content and high protein and fiber contents. Their grain production reaches approximately 93,210 × 103 tons per year. Pulses benefit from the symbiosis with atmospheric N2-fixing bacteria, which increases productivity and reduces the need for N fertilizers, thus contributing to mitigation of environmental impact mitigation. Additionally, the root region harbors a rich microbial community with multiple traits related to plant growth promotion, such as nutrient increase and tolerance enhancement to abiotic or biotic stresses. We reviewed the eight most common pulses accounting for almost 90% of world production: common beans, chickpeas, peas, cowpeas, mung beans, lentils, broad beans, and pigeon peas. We focused on updated information considering both single-rhizobial inoculation and co-inoculation with plant growth-promoting rhizobacteria. We found approximately 80 microbial taxa with PGPR traits, mainly Bacillus sp., B. subtilis, Pseudomonas sp., P. fluorescens, and arbuscular mycorrhizal fungi, and that contributed to improve plant growth and yield under different conditions. In addition, new data on root, nodule, rhizosphere, and seed microbiomes point to strategies that can be used to design new generations of biofertilizers, highlighting the importance of microorganisms for productive pulse systems.
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Affiliation(s)
| | | | - Anelise Dias
- Departamento de Fitotecnia, Instituto de Agronomia, Universidade Federal Rural do Rio de Janeiro, UFRRJ, Rodovia BR-465, Km 7, Seropédica 23890-000, RJ, Brazil
| | | | - Yulimar Castro Molina
- Programa de Pós-graduação em Microbiologia Agrícola, Universidade Federal de Lavras, UFLA, Trevo Rotatório Professor Edmir Sá Santos, Lavras 37203-202, MG, Brazil
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22
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Biełło KA, Lucena C, López-Tenllado FJ, Hidalgo-Carrillo J, Rodríguez-Caballero G, Cabello P, Sáez LP, Luque-Almagro V, Roldán MD, Moreno-Vivián C, Olaya-Abril A. Holistic view of biological nitrogen fixation and phosphorus mobilization in Azotobacter chroococcum NCIMB 8003. Front Microbiol 2023; 14:1129721. [PMID: 36846808 PMCID: PMC9945222 DOI: 10.3389/fmicb.2023.1129721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 01/23/2023] [Indexed: 02/11/2023] Open
Abstract
Nitrogen (N) and phosphorus (P) deficiencies are two of the most agronomic problems that cause significant decrease in crop yield and quality. N and P chemical fertilizers are widely used in current agriculture, causing environmental problems and increasing production costs. Therefore, the development of alternative strategies to reduce the use of chemical fertilizers while maintaining N and P inputs are being investigated. Although dinitrogen is an abundant gas in the atmosphere, it requires biological nitrogen fixation (BNF) to be transformed into ammonium, a nitrogen source assimilable by living organisms. This process is bioenergetically expensive and, therefore, highly regulated. Factors like availability of other essential elements, as phosphorus, strongly influence BNF. However, the molecular mechanisms of these interactions are unclear. In this work, a physiological characterization of BNF and phosphorus mobilization (PM) from an insoluble form (Ca3(PO4)2) in Azotobacter chroococcum NCIMB 8003 was carried out. These processes were analyzed by quantitative proteomics in order to detect their molecular requirements and interactions. BNF led to a metabolic change beyond the proteins strictly necessary to carry out the process, including the metabolism related to other elements, like phosphorus. Also, changes in cell mobility, heme group synthesis and oxidative stress responses were observed. This study also revealed two phosphatases that seem to have the main role in PM, an exopolyphosphatase and a non-specific alkaline phosphatase PhoX. When both BNF and PM processes take place simultaneously, the synthesis of nitrogenous bases and L-methionine were also affected. Thus, although the interdependence is still unknown, possible biotechnological applications of these processes should take into account the indicated factors.
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Affiliation(s)
- Karolina A. Biełło
- Departamento de Bioquímica y Biología Molecular, Edificio Severo Ochoa, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - Carlos Lucena
- Departamento de Botánica, Ecología y Fisiología Vegetal, Edificio Celestino Mutis, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - Francisco J. López-Tenllado
- Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Fina y Nanoquímica (IUNAN), Universidad de Córdoba, Córdoba, Spain
| | - Jesús Hidalgo-Carrillo
- Departamento de Química Orgánica, Instituto Universitario de Investigación en Química Fina y Nanoquímica (IUNAN), Universidad de Córdoba, Córdoba, Spain
| | - Gema Rodríguez-Caballero
- Departamento de Bioquímica y Biología Molecular, Edificio Severo Ochoa, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - Purificación Cabello
- Departamento de Botánica, Ecología y Fisiología Vegetal, Edificio Celestino Mutis, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - Lara P. Sáez
- Departamento de Bioquímica y Biología Molecular, Edificio Severo Ochoa, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - Víctor Luque-Almagro
- Departamento de Bioquímica y Biología Molecular, Edificio Severo Ochoa, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - María Dolores Roldán
- Departamento de Bioquímica y Biología Molecular, Edificio Severo Ochoa, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - Conrado Moreno-Vivián
- Departamento de Bioquímica y Biología Molecular, Edificio Severo Ochoa, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - Alfonso Olaya-Abril
- Departamento de Bioquímica y Biología Molecular, Edificio Severo Ochoa, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain,*Correspondence: Alfonso Olaya-Abril,
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23
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Morel Revetria MA, Berais-Rubio A, Giménez M, Sanjuán J, Signorelli S, Monza J. Competitiveness and Phylogenetic Relationship of Rhizobial Strains with Different Symbiotic Efficiency in Trifolium repens: Conversion of Parasitic into Non-Parasitic Rhizobia by Natural Symbiotic Gene Transfer. Biology (Basel) 2023; 12. [PMID: 36829520 DOI: 10.3390/biology12020243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/25/2023] [Accepted: 01/27/2023] [Indexed: 02/09/2023]
Abstract
In Uruguayan soils, populations of native and naturalized rhizobia nodulate white clover. These populations include efficient rhizobia but also parasitic strains, which compete for nodule occupancy and hinder optimal nitrogen fixation by the grassland. Nodulation competitiveness assays using gusA-tagged strains proved a high nodule occupancy by the inoculant strain U204, but this was lower than the strains with intermediate efficiencies, U268 and U1116. Clover biomass production only decreased when the parasitic strain UP3 was in a 99:1 ratio with U204, but not when UP3 was at equal or lower numbers than U204. Based on phylogenetic analyses, strains with different efficiencies did not cluster together, and U1116 grouped with the parasitic strains. Our results suggest symbiotic gene transfer from an effective strain to U1116, thereby improving its symbiotic efficiency. Genome sequencing of U268 and U204 strains allowed us to assign them to species Rhizobium redzepovicii, the first report of this species nodulating clover, and Rhizobium leguminosarun, respectively. We also report the presence of hrrP- and sapA-like genes in the genomes of WSM597, U204, and U268 strains, which are related to symbiotic efficiency in rhizobia. Interestingly, we report here chromosomally located hrrP-like genes.
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24
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Ni H, Wu Y, Zong R, Ren S, Pan D, Yu L, Li J, Qu Z, Wang Q, Zhao G, Zhao J, Liu L, Li T, Zhang Y, Tu Q. Combination of Aspergillus niger MJ1 with Pseudomonas stutzeri DSM4166 or mutant Pseudomonas fluorescens CHA0- nif improved crop quality, soil properties, and microbial communities in barrier soil. Front Microbiol 2023; 14:1064358. [PMID: 36819023 PMCID: PMC9932699 DOI: 10.3389/fmicb.2023.1064358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 01/17/2023] [Indexed: 02/05/2023] Open
Abstract
Soil salinization and acidification seriously damage soil health and restricts the sustainable development of planting. Excessive application of chemical fertilizer and other reasons will lead to soil acidification and salinization. This study focus on acid and salinized soil, investigated the effect of phosphate-solubilizing bacteria, Aspergillus niger MJ1 combined with nitrogen-fixing bacteria Pseudomonas stutzeri DSM4166 or mutant Pseudomonas fluorescens CHA0-nif on crop quality, soil physicochemical properties, and microbial communities. A total of 5 treatments were set: regular fertilization (T1), regular fertilization with MJ1 and DSM4166 (T2), regular fertilization with MJ1 and CHA0-nif (T3), 30%-reducing fertilization with MJ1 and DSM4166 (T4), and 30%-reducing fertilization with MJ1 and CHA0-nif (T5). It was found that the soil properties (OM, HN, TN, AP, AK, and SS) and crop quality of cucumber (yield production, protein, and vitamin C) and lettuce (yield production, vitamin C, nitrate, soluble protein, and crude fiber) showed a significant response to the inoculated strains. The combination of MJ1 with DSM4166 or CHA0-nif influenced the diversity and richness of bacterial community in the lettuce-grown soil. The organismal system-, cellular process-, and metabolism-correlated bacteria and saprophytic fungi were enriched, which were speculated to mediate the response to inoculated strains. pH, OM, HN, and TN were identified to be the major factors correlated with the soil microbial community. The inoculation of MJ1 with DSM4166 and CHA0-nif could meet the requirement of lettuce and cucumber growth after reducing fertilization in acid and salinized soil, which provides a novel candidate for the eco-friendly technique to meet the carbon-neutral topic.
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Affiliation(s)
- Haiping Ni
- Helmholtz International Lab for Anti-Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China,Qingdao Hexie Biotechnology Co., Ltd., Qingdao, China
| | - Yuxia Wu
- Helmholtz International Lab for Anti-Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China,CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Rui Zong
- Qingdao Hexie Biotechnology Co., Ltd., Qingdao, China
| | - Shiai Ren
- Qingdao Hexie Biotechnology Co., Ltd., Qingdao, China
| | - Deng Pan
- Helmholtz International Lab for Anti-Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Lei Yu
- Shandong Agricultural Technology Extension Center, Jinan, China
| | - Jianwei Li
- Shandong Agricultural Technology Extension Center, Jinan, China
| | - Zhuling Qu
- Qingdao Hexie Biotechnology Co., Ltd., Qingdao, China
| | - Qiyao Wang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Tai’an, China
| | - Gengxing Zhao
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Tai’an, China
| | - Jianzhong Zhao
- Shandong Rural Economic Management and Service Center, Jinan, China
| | - Lumin Liu
- Qingdao Hexie Biotechnology Co., Ltd., Qingdao, China
| | - Tao Li
- Shandong Agricultural Technology Extension Center, Jinan, China
| | - Youming Zhang
- Helmholtz International Lab for Anti-Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China,CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China,*Correspondence: Youming Zhang, ✉
| | - Qiang Tu
- Helmholtz International Lab for Anti-Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China,CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China,Qiang Tu, ✉
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25
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Karavidas I, Ntatsi G, Ntanasi T, Tampakaki A, Giannopoulou A, Pantazopoulou D, Sabatino L, Iannetta PPM, Savvas D. Hydroponic Common-Bean Performance under Reduced N-Supply Level and Rhizobia Application. Plants (Basel) 2023; 12:646. [PMID: 36771728 PMCID: PMC9920343 DOI: 10.3390/plants12030646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/26/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
This study aims to explore the possibility of a reduced application of inorganic nitrogen (N) fertiliser on the yield, yield qualities, and biological nitrogen fixation (BNF) of the hydroponic common bean (Phaseolus vulgaris L.), without compromising plant performance, by utilizing the inherent ability of this plant to symbiotically fix N2. Until the flowering stage, plants were supplied with a nutrient solution containing N-concentrations of either a, 100%, conventional standard-practice, 13.8 mM; b, 75% of the standard, 10.35 mM; or c, 50% of the standard, 6.9 mM. During the subsequent reproductive stage, inorganic-N treatments b and c were decreased to 25% of the standard, and the standard (100% level) N-application was not altered. The three different inorganic-N supply treatments were combined with two different rhizobia strains, and a control (no-inoculation) treatment, in a two-factorial experiment. The rhizobia strains applied were either the indigenous strain Rhizobium sophoriradicis PVTN21 or the commercially supplied Rhizobium tropici CIAT 899. Results showed that the 50-25% mineral-N application regime led to significant increases in nodulation, BNF, and fresh-pod yield, compared to the other treatment, with a reduced inorganic-N supply. On the other hand, the 75-25% mineral-N regime applied during the vegetative stage restricted nodulation and BNF, thus incurring significant yield losses. Both rhizobia strains stimulated nodulation and BNF. However, the BNF capacity they facilitated was suppressed as the inorganic-N input increased. In addition, strain PVTN21 was superior to CIAT 899-as 50-25% N-treated plants inoculated with the former showed a yield loss of 11%, compared to the 100%-N-treated plants. In conclusion, N-use efficiency optimises BNF, reduces mineral-N-input dependency, and therefore may reduce any consequential negative environmental consequences of mineral-N over-application.
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Affiliation(s)
- Ioannis Karavidas
- Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Georgia Ntatsi
- Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Theodora Ntanasi
- Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Anastasia Tampakaki
- Department of Agriculture, Hellenic Mediterranean University, Estavromenos, 71410 Heraklion, Greece
| | - Ariadni Giannopoulou
- Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Dimitra Pantazopoulou
- Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Leo Sabatino
- Department of Agricultural, Food and Forest Sciences, University of Palermo, 90128 Palermo, Italy
| | | | - Dimitrios Savvas
- Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
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da Silva TR, Rodrigues RT, Jovino RS, Carvalho JRDS, Leite J, Hoffman A, Fischer D, Ribeiro PRDA, Rouws LFM, Radl V, Fernandes-Júnior PI. Not just passengers, but co-pilots! Non-rhizobial nodule-associated bacteria promote cowpea growth and symbiosis with (brady)rhizobia. J Appl Microbiol 2023; 134:6887843. [PMID: 36626727 DOI: 10.1093/jambio/lxac013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 08/15/2022] [Accepted: 10/07/2022] [Indexed: 01/12/2023]
Abstract
AIMS To isolate and characterize non-rhizobial nodule-associated bacteria (NAB) from cowpea root-nodules regarding their performance of plant-growth-promoting mechanisms and their ability to enhance cowpea growth and symbiosis when co-inoculated with bradyrhizobia. METHODS AND RESULTS Sixteen NAB were isolated, identified, and in vitro evaluated for plant growth promotion traits. The ability to promote cowpea growth was analyzed when co-inoculated with Bradyrhizobium pachyrhizi BR 3262 in sterile and non-sterile substrates. The 16S rRNA gene sequences analysis revealed that NAB belonged to the genera Chryseobacterium (4), Bacillus (3), Microbacterium (3), Agrobacterium (1), Escherichia (1), Delftia (1), Pelomonas (1), Sphingomonas (1), and Staphylococcus (1). All strains produced different amounts of auxin siderophores and formed biofilms. Twelve out of the 16 strains carried the nifH, a gene associated with nitrogen fixation. Co-inoculation of NAB (ESA 424 and ESA 29) with Bradyrhizobium pachyrhizi BR 3262 significantly promoted cowpea growth, especially after simultaneous inoculation with the three strains. CONCLUSIONS NAB are efficient cowpea growth promoters and can improve the efficiency of the symbiosis between cowpea and the N2-fixing microsymbiont B. pachyrhizi BR 3262, mainly under a specific triple microbial association.
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Affiliation(s)
- Thaíse Rosa da Silva
- Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (Univasf), Petrolina, PE 56304-205, Brazil
| | - Ruth Terezinha Rodrigues
- Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (Univasf), Petrolina, PE 56304-205, Brazil
| | | | | | - Jakson Leite
- Instituto Federal de Educação, Ciência e Tecnologia do Pará (IFPA), Campus Itaituba, Itaituba, PA 68183-300, Brazil
| | - Andreas Hoffman
- Helmholtz Munich, German Research Center for Environmental Health, Neuherberg, Munich 85764, Germany
| | - Doreen Fischer
- Helmholtz Munich, German Research Center for Environmental Health, Neuherberg, Munich 85764, Germany
| | - Paula Rose de Almeida Ribeiro
- Fundação de Amparo à Pesquisa do Estado de Pernambuco (Facepe), Recife, PE 50720-001, Brazil.,Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brasília, DF 71605-001, Brazil.,Embrapa Semiárido, Petrolina, PE 56302-970, Brazil
| | | | - Viviane Radl
- Helmholtz Munich, German Research Center for Environmental Health, Neuherberg, Munich 85764, Germany
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Li Y, Guo L, Kolton M, Yang R, Zhang M, Qi F, Soleimani M, Sun X, Li B, Gao W, Yan G, Xu R, Sun W. Chemolithotrophic Biological Nitrogen Fixation Fueled by Antimonite Oxidation May Be Widespread in Sb-Contaminated Habitats. Environ Sci Technol 2023; 57:231-243. [PMID: 36525577 DOI: 10.1021/acs.est.2c06424] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Nitrogen (N) deficiency in mining-contaminated habitats usually hinders plant growth and thus hampers tailing revegetation. Biological N fixation (BNF) is an essential biogeochemical process that contributes to the initial accumulation of N in oligotrophic mining-contaminated regions. Previous studies reported that chemolithotrophic rather than heterotrophic diazotrophs frequently dominated in the mining-contaminated regions. Chemolithotrophic diazotrophs may utilize elements abundant in such habitats (e.g., sulfur (S), arsenic (As), and antimony (Sb)) as electron donors to fix N2. BNF fueled by the oxidation of S and As has been detected in previous studies. However, BNF fueled by Sb(III) oxidation (Sb-dependent BNF) has never been reported. The current study observed the presence of Sb-dependent BNF in slurries inoculated from Sb-contaminated habitats across the South China Sb belt, suggesting that Sb-dependent BNF may be widespread in this region. DNA-stable isotope probing identified bacteria associated with Rhodocyclaceae and Rhizobiaceae as putative microorganisms responsible for Sb-dependent BNF. Furthermore, metagenomic-binning demonstrated that Rhodocyclaceae and Rhizobiaceae contained essential genes involved in Sb(III) oxidation, N2 fixation, and carbon fixation, suggesting their genetic potential for Sb-dependent BNF. In addition, meta-analysis indicated that these bacteria are widespread among Sb-contaminated habitats with different niche preferences: Rhodocyclaceae was enriched in river sediments and tailings, while Rhizobiaceae was enriched only in soils. This study may broaden our fundamental understanding of N fixation in Sb-mining regions.
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Affiliation(s)
- Yongbin Li
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Lifang Guo
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Max Kolton
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- French Associates Institute for Agriculture and Biotechnology of Drylands, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Rui Yang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Miaomiao Zhang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Fangjie Qi
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Mohsen Soleimani
- Department of Natural Resources, Isfahan University of Technology, Isfahan 83111-84156, Iran
| | - Xiaoxu Sun
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Baoqin Li
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Wenlong Gao
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- Hainan Key Laboratory of Tropical Eco-Circular Agriculture, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
- Hainan Danzhou Tropical Agro-ecosystem National Observation and Research Station, Danzhou 571737, China
| | - Geng Yan
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Rui Xu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Weimin Sun
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
- Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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Zhang W, Chen Y, Huang K, Wang F, Mei Z. Molecular Mechanism and Agricultural Application of the NifA-NifL System for Nitrogen Fixation. Int J Mol Sci 2023; 24. [PMID: 36674420 DOI: 10.3390/ijms24020907] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/06/2023] Open
Abstract
Nitrogen-fixing bacteria execute biological nitrogen fixation through nitrogenase, converting inert dinitrogen (N2) in the atmosphere into bioavailable nitrogen. Elaborating the molecular mechanisms of orderly and efficient biological nitrogen fixation and applying them to agricultural production can alleviate the "nitrogen problem". Azotobacter vinelandii is a well-established model bacterium for studying nitrogen fixation, utilizing nitrogenase encoded by the nif gene cluster to fix nitrogen. In Azotobacter vinelandii, the NifA-NifL system fine-tunes the nif gene cluster transcription by sensing the redox signals and energy status, then modulating nitrogen fixation. In this manuscript, we investigate the transcriptional regulation mechanism of the nif gene in autogenous nitrogen-fixing bacteria. We discuss how autogenous nitrogen fixation can better be integrated into agriculture, providing preliminary comprehensive data for the study of autogenous nitrogen-fixing regulation.
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Zama N, Kirkman K, Mkhize N, Tedder M, Magadlela A. Soil Acidification in Nutrient-Enriched Soils Reduces the Growth, Nutrient Concentrations, and Nitrogen-Use Efficiencies of Vachellia sieberiana (DC.) Kyal. & Boatwr Saplings. Plants (Basel) 2022; 11:plants11243564. [PMID: 36559678 PMCID: PMC9781205 DOI: 10.3390/plants11243564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/28/2022] [Accepted: 12/13/2022] [Indexed: 06/12/2023]
Abstract
Nitrogen (N) and phosphorus (P) nutrient enrichment is important for grasslands. This study aimed to determine how soils enriched with N and P influenced soil concentration correlations and affected the growth kinetics, mineral nutrition, and nitrogen-use efficiencies of Vachellia sieberiana grown in a greenhouse experiment. The soils used as the growth substrate were analysed and showed extreme acidity (low soil pH, 3.9). Nitrogen-enriched soils were more acidic than P-enriched soils. Exchangeable acidity was strongly negatively correlated with an increase in soil pH, with soil pH between 3.9 and 4.1 units showing the strongest decline. Plant saplings showed increased root biomass, shoot biomass, total biomass, and plant N and P concentrations when grown in soils with high soil P concentrations. Extreme soil acidification in N-enriched soil was one of the main factors causing P unavailability, decreasing sapling growth. Extreme soil acidification increased concentrations of toxic heavy metals, such as Al which may be alleviated by adding lime to the extremely acidic soils. Research implications suggest that soil pH is an important chemical property of the soil and plays a significant role in legume plant growth. Legume species that are unable to tolerate acidic soils may acquire different strategies for growth and functioning.
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Affiliation(s)
- Naledi Zama
- School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa
- Agricultural Research Council, Animal Production Institute, Private Bag X02, Irene 0062, South Africa
| | - Kevin Kirkman
- School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa
| | - Ntuthuko Mkhize
- School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa
- Agricultural Research Council, Animal Production Institute, Private Bag X02, Irene 0062, South Africa
| | - Michelle Tedder
- School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa
| | - Anathi Magadlela
- School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
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30
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Li Q, Zhang H, Song Y, Wang M, Hua C, Li Y, Chen S, Dixon R, Li J. Alanine synthesized by alanine dehydrogenase enables ammonium-tolerant nitrogen fixation in Paenibacillus sabinae T27. Proc Natl Acad Sci U S A 2022; 119:e2215855119. [PMID: 36459643 DOI: 10.1073/pnas.2215855119] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Most diazotrophs fix nitrogen only under nitrogen-limiting conditions, for example, in the presence of relatively low concentrations of NH4+ (0 to 2 mM). However, Paenibacillus sabinae T27 exhibits an unusual pattern of nitrogen regulation of nitrogen fixation, since although nitrogenase activities are high under nitrogen-limiting conditions (0 to 3 mM NH4+) and are repressed under conditions of nitrogen sufficiency (4 to 30 mM NH4+), nitrogenase activity is reestablished when very high levels of NH4+ (30 to 300 mM) are present in the medium. To further understand this pattern of nitrogen fixation regulation, we carried out transcriptome analyses of P. sabinae T27 in response to increasing ammonium concentrations. As anticipated, the nif genes were highly expressed, either in the absence of fixed nitrogen or in the presence of a high concentration of NH4+ (100 mM), but were subject to negative feedback regulation at an intermediate concentration of NH4+ (10 mM). Among the differentially expressed genes, ald1, encoding alanine dehydrogenase (ADH1), was highly expressed in the presence of a high level of NH4+ (100 mM). Mutation and complementation experiments revealed that ald1 is required for nitrogen fixation at high ammonium concentrations. We demonstrate that alanine, synthesized by ADH1 from pyruvate and NH4+, inhibits GS activity, leading to a low intracellular glutamine concentration that prevents feedback inhibition of GS and mimics nitrogen limitation, enabling activation of nif transcription by the nitrogen-responsive regulator GlnR in the presence of high levels of extracellular ammonium.
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de Moura GGD, de Barros AV, Machado F, da Silva Dambroz CM, Glienke C, Petters-Vandresen DAL, Alves E, Schwan RF, Pasqual M, Dória J. The Friend Within: Endophytic Bacteria as a Tool for Sustainability in Strawberry Crops. Microorganisms 2022; 10:microorganisms10122341. [PMID: 36557594 PMCID: PMC9780916 DOI: 10.3390/microorganisms10122341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/05/2022] [Accepted: 10/21/2022] [Indexed: 11/29/2022] Open
Abstract
Strawberry (Fragaria x ananassa, Duch.) is an important crop worldwide. However, since it is a highly demanding crop in terms of the chemical conditions of the substrate, a large part of strawberry production implies the application of large amounts of fertilizers in the production fields. This practice can cause environmental problems, in addition to increases in the fruit's production costs. In this context, applying plant growth-promoting bacteria in production fields can be an essential strategy, especially thanks to their ability to stimulate plant growth via different mechanisms. Therefore, this study aimed to test in vitro and in vivo the potential of bacteria isolated from strawberry leaves and roots to directly promote plant growth. The isolates were tested in vitro for their ability to produce auxins, solubilize phosphate and fix nitrogen. Isolates selected in vitro were tested on strawberry plants to promote plant growth and increase the accumulation of nitrogen and phosphorus in the leaves. The tested isolates showed an effect on plant growth according to biometric parameters. Among the tested isolates, more expressive results for the studied variables were observed with the inoculation of the isolate MET12M2, belonging to the species Brevibacillus fluminis. In general, bacterial inoculation induced strain-dependent effects on strawberry growth. In vitro and in vivo assays showed the potential use of the B. fluminis MET12M2 isolate as a growth promoter for strawberries.
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Affiliation(s)
| | | | - Franklin Machado
- Phytopathology Department, Federal University of Viçosa, Viçosa 36570-900, Brazil
| | | | - Chirlei Glienke
- Genetic Department, Federal University of Paraná, Curitiba 81531-980, Brazil
| | | | - Eduardo Alves
- Phytopathology Department, Federal University of Lavras, Lavras 37200-900, Brazil
| | | | - Moacir Pasqual
- Agriculture Department, Federal University of Lavras, Lavras 37200-900, Brazil
| | - Joyce Dória
- Agriculture Department, Federal University of Lavras, Lavras 37200-900, Brazil
- Correspondence:
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Yan D, Tajima H, Cline LC, Fong RY, Ottaviani JI, Shapiro H, Blumwald E. Genetic modification of flavone biosynthesis in rice enhances biofilm formation of soil diazotrophic bacteria and biological nitrogen fixation. Plant Biotechnol J 2022; 20:2135-2148. [PMID: 35869808 PMCID: PMC9616522 DOI: 10.1111/pbi.13894] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 07/05/2022] [Accepted: 07/15/2022] [Indexed: 05/06/2023]
Abstract
Improving biological nitrogen fixation (BNF) in cereal crops is a long-sought objective; however, no successful modification of cereal crops showing increased BNF has been reported. Here, we described a novel approach in which rice plants were modified to increase the production of compounds that stimulated biofilm formation in soil diazotrophic bacteria, promoted bacterial colonization of plant tissues and improved BNF with increased grain yield at limiting soil nitrogen contents. We first used a chemical screening to identify plant-produced compounds that induced biofilm formation in nitrogen-fixing bacteria and demonstrated that apigenin and other flavones induced BNF. We then used CRISPR-based gene editing targeting apigenin breakdown in rice, increasing plant apigenin contents and apigenin root exudation. When grown at limiting soil nitrogen conditions, modified rice plants displayed increased grain yield. Biofilm production also modified the root microbiome structure, favouring the enrichment of diazotrophic bacteria recruitment. Our results support the manipulation of the flavone biosynthetic pathway as a feasible strategy for the induction of biological nitrogen fixation in cereals and a reduction in the use of inorganic nitrogen fertilizers.
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Affiliation(s)
- Dawei Yan
- Department of Plant SciencesUniversity of CaliforniaDavisCaliforniaUSA
| | - Hiromi Tajima
- Department of Plant SciencesUniversity of CaliforniaDavisCaliforniaUSA
| | | | - Reedmond Y. Fong
- Department of NutritionUniversity of CaliforniaDavisCaliforniaUSA
| | - Javier I. Ottaviani
- Department of NutritionUniversity of CaliforniaDavisCaliforniaUSA
- Mars Inc.McLeanVirginiaUSA
| | | | - Eduardo Blumwald
- Department of Plant SciencesUniversity of CaliforniaDavisCaliforniaUSA
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Pankievicz VCS, Delaux PM, Infante V, Hirsch HH, Rajasekar S, Zamora P, Jayaraman D, Calderon CI, Bennett A, Ané JM. Nitrogen fixation and mucilage production on maize aerial roots is controlled by aerial root development and border cell functions. Front Plant Sci 2022; 13:977056. [PMID: 36275546 PMCID: PMC9583020 DOI: 10.3389/fpls.2022.977056] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Exploring natural diversity for biological nitrogen fixation in maize and its progenitors is a promising approach to reducing our dependence on synthetic fertilizer and enhancing the sustainability of our cropping systems. We have shown previously that maize accessions from the Sierra Mixe can support a nitrogen-fixing community in the mucilage produced by their abundant aerial roots and obtain a significant fraction of their nitrogen from the air through these associations. In this study, we demonstrate that mucilage production depends on root cap and border cells sensing water, as observed in underground roots. The diameter of aerial roots correlates with the volume of mucilage produced and the nitrogenase activity supported by each root. Young aerial roots produce more mucilage than older ones, probably due to their root cap's integrity and their ability to produce border cells. Transcriptome analysis on aerial roots at two different growth stages before and after mucilage production confirmed the expression of genes involved in polysaccharide synthesis and degradation. Genes related to nitrogen uptake and assimilation were up-regulated upon water exposure. Altogether, our findings suggest that in addition to the number of nodes with aerial roots reported previously, the diameter of aerial roots and abundance of border cells, polysaccharide synthesis and degradation, and nitrogen uptake are critical factors to ensure efficient nitrogen fixation in maize aerial roots.
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Affiliation(s)
| | - Pierre-Marc Delaux
- Department of Bacteriology and Agronomy, University of Wisconsin-Madison, Madison, WI, United States
| | - Valentina Infante
- Department of Bacteriology and Agronomy, University of Wisconsin-Madison, Madison, WI, United States
| | - Hayley H. Hirsch
- Department of Bacteriology and Agronomy, University of Wisconsin-Madison, Madison, WI, United States
| | - Shanmugam Rajasekar
- Department of Bacteriology and Agronomy, University of Wisconsin-Madison, Madison, WI, United States
| | - Pablo Zamora
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - Dhileepkumar Jayaraman
- Department of Bacteriology and Agronomy, University of Wisconsin-Madison, Madison, WI, United States
| | | | - Alan Bennett
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - Jean-Michel Ané
- Department of Bacteriology and Agronomy, University of Wisconsin-Madison, Madison, WI, United States
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Braghiere RK, Fisher JB, Allen K, Brzostek E, Shi M, Yang X, Ricciuto DM, Fisher RA, Zhu Q, Phillips RP. Modeling Global Carbon Costs of Plant Nitrogen and Phosphorus Acquisition. J Adv Model Earth Syst 2022; 14:e2022MS003204. [PMID: 36245670 PMCID: PMC9539603 DOI: 10.1029/2022ms003204] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 08/02/2022] [Accepted: 08/06/2022] [Indexed: 06/16/2023]
Abstract
Most Earth system models (ESMs) do not explicitly represent the carbon (C) costs of plant nutrient acquisition, which leads to uncertainty in predictions of the current and future constraints to the land C sink. We integrate a plant productivity-optimizing nitrogen (N) and phosphorus (P) acquisition model (fixation & uptake of nutrients, FUN) into the energy exascale Earth system (E3SM) land model (ELM). Global plant N and P uptake are dynamically simulated by ELM-FUN based on the C costs of nutrient acquisition from mycorrhizae, direct root uptake, retranslocation from senescing leaves, and biological N fixation. We benchmarked ELM-FUN with three classes of products: ILAMB, a remotely sensed nutrient limitation product, and CMIP6 models; we found significant improvements in C cycle variables, although the lack of more observed nutrient data prevents a comprehensive level of benchmarking. Overall, we found N and P co-limitation for 80% of land area, with the remaining 20% being either predominantly N or P limited. Globally, the new model predicts that plants invested 4.1 Pg C yr-1 to acquire 841.8 Tg N yr-1 and 48.1 Tg P yr-1 (1994-2005), leading to significant downregulation of global net primary production (NPP). Global NPP is reduced by 20% with C costs of N and 50% with C costs of NP. Modeled and observed nutrient limitation agreement increases when N and P are considered together (r 2 from 0.73 to 0.83).
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Affiliation(s)
- R. K. Braghiere
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
- Joint Institute for Regional Earth System Science and EngineeringUniversity of California Los AngelesLos AngelesCAUSA
- Division of Geological and Planetary SciencesCalifornia Institute of TechnologyPasadenaCAUSA
| | - J. B. Fisher
- Schmid College of Science and TechnologyChapman UniversityOrangeCAUSA
| | - K. Allen
- Manaaki Whenua—Landcare ResearchLincolnNew Zealand
| | - E. Brzostek
- Department of BiologyWest Virginia UniversityMorgantownWVUSA
| | - M. Shi
- Pacific Northwest National LaboratoryRichlandWAUSA
| | - X. Yang
- Environmental Sciences Division and Climate Change Science InstituteOak Ridge National LaboratoryOak RidgeTNUSA
| | - D. M. Ricciuto
- Environmental Sciences Division and Climate Change Science InstituteOak Ridge National LaboratoryOak RidgeTNUSA
| | - R. A. Fisher
- Center for International Climate ResearchOsloNorway
- Laboratoire Évolution & Diversité BiologiqueCNRS:UMRUniversité Paul SabatierToulouseFrance
| | - Q. Zhu
- Climate and Ecosystem Sciences DivisionClimate Sciences DepartmentLawrence Berkeley National LaboratoryBerkeleyCAUSA
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de Paula AF, Cruz FDPN, Dinato NB, de Andrade PHM, de Moraes ACP, Junior WB, Bernardi ACDC, Vigna BBZ, Fávero AP, Lacava PT. Endophytic and rhizospheric bacteria associated with Paspalum atratum and its potential for plant growth promotion with different phosphate sources. Front Plant Sci 2022; 13:884716. [PMID: 35968102 PMCID: PMC9365944 DOI: 10.3389/fpls.2022.884716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 07/05/2022] [Indexed: 06/15/2023]
Abstract
The genus Paspalum belongs to the family Poaceae and has several species that are native to Brazil. The Paspalum Germplasm Bank (GB) of the Brazilian Agricultural Research Corporation comprises approximately 450 accessions from 50 species. Among these accessions, Paspalum atratum (BGP 308) has economic potential for forage purposes. However, the endophytic and rhizospheric microbial communities within this accession and their ability to promote plant growth remain unknown. The present study aimed to isolate the endophytic and rhizospheric bacteria associated with P. atratum and to assess their potential for plant growth improvement, so-called plant growth-promoting bacteria (PGPB). For the in vitro tests, the ability of nitrogen-fixing bacteria (NFB), phosphate solubilization (PS) and indoleacetic acid (IAA) production were evaluated. A total of 116 endophytic and rhizosphere bacteria were obtained from the isolation. In the in vitro tests, 43 (37.00%) of these isolates showed positive NFB, PS, and IAA results. These isolates were identified by 16S rDNA sequencing. The phosphate solubilization index (PSI) ranged from 2 to 3.61, all 43 strains performed biological nitrogen fixation and the IAA production ranged from 12.85 to 431.41 μg ml-1. Eight of these 43 isolates were evaluated in vivo in a greenhouse using P. atratum caryopsis. The pots were filled with soil prepared with three different phosphate sources and one control without phosphate. After growth, the plants were submitted to morphological, bromatological and chemical determination. Data were analyzed using analysis of variance (ANOVA) and principal component analysis (PCA). In the in vivo test, treatments 105 (Pseudomonas sp.) and 458 (Pseudomonas sp.) were the most significant for the crystalline phosphate source, 109 (Bacillus sp.) for the sedimentary phosphate source and, as for the soluble phosphate source most treatments that received bacterial isolates had higher phosphorus content in the dry matter than the uninoculated soluble phosphate control. The 105FCR (crystalline phosphate + Pseudomonas sp.), 109FSE (sedimentary phosphate + Bacillus sp.), and 110 FSE (sedimentary phosphate + Enterobacter sp.) treatments showed the best results for plant growth promotion. This work made it possible to determine the bacterial community associated with P. atratum (BGP308) and to obtain new potential plant growth-promoting strains.
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Affiliation(s)
- Ailton Ferreira de Paula
- Laboratory of Microbiology and Biomolecules, Department of Morphology and Pathology, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
- Evolutionary Genetics and Molecular Biology Graduate Program, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
| | - Felipe de Paula Nogueira Cruz
- Laboratory of Microbiology and Biomolecules, Department of Morphology and Pathology, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
- Biotechnology Graduate Program, Exact and Technology Sciences Center, Federal University of São Carlos, São Carlos, Brazil
| | - Naiana Barbosa Dinato
- Evolutionary Genetics and Molecular Biology Graduate Program, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
- Embrapa Pecuária Sudeste, São Carlos, Brazil
| | - Paulo Henrique Marques de Andrade
- Laboratory of Microbiology and Biomolecules, Department of Morphology and Pathology, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
- Evolutionary Genetics and Molecular Biology Graduate Program, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
| | - Amanda Carolina Prado de Moraes
- Laboratory of Microbiology and Biomolecules, Department of Morphology and Pathology, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
- Biotechnology Graduate Program, Exact and Technology Sciences Center, Federal University of São Carlos, São Carlos, Brazil
| | | | | | | | - Alessandra Pereira Fávero
- Evolutionary Genetics and Molecular Biology Graduate Program, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
- Embrapa Pecuária Sudeste, São Carlos, Brazil
| | - Paulo Teixeira Lacava
- Laboratory of Microbiology and Biomolecules, Department of Morphology and Pathology, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
- Evolutionary Genetics and Molecular Biology Graduate Program, Biological and Health Sciences Center, Federal University of São Carlos, São Carlos, Brazil
- Biotechnology Graduate Program, Exact and Technology Sciences Center, Federal University of São Carlos, São Carlos, Brazil
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Lu J, Yang J, Keitel C, Yin L, Wang P, Cheng W, Dijkstra FA. Belowground Carbon Efficiency for Nitrogen and Phosphorus Acquisition Varies Between Lolium perenne and Trifolium repens and Depends on Phosphorus Fertilization. Front Plant Sci 2022; 13:927435. [PMID: 35812934 PMCID: PMC9263692 DOI: 10.3389/fpls.2022.927435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 06/03/2022] [Indexed: 06/15/2023]
Abstract
Photosynthetically derived carbon (C) is allocated belowground, allowing plants to obtain nutrients. However, less is known about the amount of nutrients acquired relative to the C allocated belowground, which is referred to as C efficiency for nutrient acquisition (CENA). Here, we examined how C efficiency for nitrogen (N) and phosphorus (P) acquisition varied between ryegrass (Lolium perenne) and clover (Trifolium repens) with and without P fertilization. A continuous 13C-labeling method was applied to track belowground C allocation. Both species allocated nearly half of belowground C to rhizosphere respiration (49%), followed by root biomass (37%), and rhizodeposition (14%). With regard to N and P, CENA was higher for clover than for ryegrass, which remained higher after accounting for relatively low C costs associated with biological N2 fixation. Phosphorus fertilization increased the C efficiency for P acquisition but decreased the C efficiency for N acquisition. A higher CENA for N and P in clover may be attributed to the greater rhizosphere priming on soil organic matter decomposition. Increased P availability with P fertilization could induce lower C allocation for P uptake but exacerbate soil N limitation, thereby making N uptake less C efficient. Overall, our study revealed that species-specific belowground C allocation and nutrient uptake efficiency depend on which nutrient is limited.
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Affiliation(s)
- Jiayu Lu
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Sydney, NSW, Australia
| | - Jinfeng Yang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Land and Environment, Shenyang Agricultural University, Shenyang, China
| | - Claudia Keitel
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Sydney, NSW, Australia
| | - Liming Yin
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Peng Wang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Weixin Cheng
- Environmental Studies Department, University of California, Santa Cruz, Santa Cruz, CA, United States
| | - Feike A. Dijkstra
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Sydney, NSW, Australia
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Appia-Ayme C, Little R, Chandra G, de Oliveira Martins C, Bueno Batista M, Dixon R. Interactions between paralogous bacterial enhancer-binding proteins enable metal-dependent regulation of alternative nitrogenases in Azotobacter vinelandii. Mol Microbiol 2022; 118:105-124. [PMID: 35718936 PMCID: PMC9542535 DOI: 10.1111/mmi.14955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/13/2022] [Accepted: 06/15/2022] [Indexed: 11/30/2022]
Abstract
All diazotrophic bacteria and archaea isolated so far utilise a nitrogenase enzyme‐containing molybdenum in the active site co‐factor to fix atmospheric dinitrogen to ammonia. However, in addition to the Mo‐dependent nitrogenase, some nitrogen‐fixing prokaryotes also express genetically distinct alternative nitrogenase isoenzymes, namely the V‐dependent and Fe‐only nitrogenases, respectively. Nitrogenase isoenzymes are expressed hierarchically according to metal availability and catalytic efficiency. In proteobacteria, this hierarchy is maintained via stringent transcriptional regulation of gene clusters by dedicated bacterial enhancer‐binding proteins (bEBPs). The model diazotroph Azotobacter vinelandii contains two paralogs of the vanadium nitrogenase activator VnfA (henceforth, VnfA1), designated VnfA2 and VnfA3, with unknown functions. Here we demonstrate that the VnfA1 and VnfA3 bEBPs bind to the same target promoters in the Azotobacter vinelandii genome and co‐activate a subset of genes in the absence of V, including the structural genes for the Fe‐only nitrogenase. Co‐activation is inhibited by the presence of V and is dependent on an accessory protein VnfZ that is co‐expressed with VnfA3. Our studies uncover a plethora of interactions between bEBPs required for nitrogen fixation, revealing the unprecedented potential for fine‐tuning the expression of alternative nitrogenases in response to metal availability.
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Affiliation(s)
| | - Richard Little
- Department of Molecular Microbiology, John Innes Centre, Norwich, UK
| | - Govind Chandra
- Department of Molecular Microbiology, John Innes Centre, Norwich, UK
| | | | | | - Ray Dixon
- Department of Molecular Microbiology, John Innes Centre, Norwich, UK
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Wekesa C, Jalloh AA, Muoma JO, Korir H, Omenge KM, Maingi JM, Furch ACU, Oelmüller R. Distribution, Characterization and the Commercialization of Elite Rhizobia Strains in Africa. Int J Mol Sci 2022; 23:ijms23126599. [PMID: 35743041 PMCID: PMC9223902 DOI: 10.3390/ijms23126599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/07/2022] [Accepted: 06/09/2022] [Indexed: 02/04/2023] Open
Abstract
Grain legumes play a significant role in smallholder farming systems in Africa because of their contribution to nutrition and income security and their role in fixing nitrogen. Biological Nitrogen Fixation (BNF) serves a critical role in improving soil fertility for legumes. Although much research has been conducted on rhizobia in nitrogen fixation and their contribution to soil fertility, much less is known about the distribution and diversity of the bacteria strains in different areas of the world and which of the strains achieve optimal benefits for the host plants under specific soil and environmental conditions. This paper reviews the distribution, characterization, and commercialization of elite rhizobia strains in Africa.
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Affiliation(s)
- Clabe Wekesa
- Matthias Schleiden Institute of Genetics, Bioinformatics and Molecular Botany and Plant Physiology, Friedrich-Schiller-University Jena, Dornburger Str. 159, 07743 Jena, Germany; (C.W.); (K.M.O.); (A.C.U.F.)
| | - Abdul A. Jalloh
- International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi 00100, Kenya;
| | - John O. Muoma
- Department of Biological Sciences, Masinde Muliro University of Science and Technology, P.O. Box 190, Kakamega 50100, Kenya;
| | - Hezekiah Korir
- Crops, Horticulture and Soils Department, Egerton University, P.O. Box 536, Egerton 20115, Kenya;
| | - Keziah M. Omenge
- Matthias Schleiden Institute of Genetics, Bioinformatics and Molecular Botany and Plant Physiology, Friedrich-Schiller-University Jena, Dornburger Str. 159, 07743 Jena, Germany; (C.W.); (K.M.O.); (A.C.U.F.)
| | - John M. Maingi
- Department of Biochemistry, Microbiology and Biotechnology, Kenyatta University, P.O. Box 43844, Nairobi 00100, Kenya;
| | - Alexandra C. U. Furch
- Matthias Schleiden Institute of Genetics, Bioinformatics and Molecular Botany and Plant Physiology, Friedrich-Schiller-University Jena, Dornburger Str. 159, 07743 Jena, Germany; (C.W.); (K.M.O.); (A.C.U.F.)
| | - Ralf Oelmüller
- Matthias Schleiden Institute of Genetics, Bioinformatics and Molecular Botany and Plant Physiology, Friedrich-Schiller-University Jena, Dornburger Str. 159, 07743 Jena, Germany; (C.W.); (K.M.O.); (A.C.U.F.)
- Correspondence: ; Tel.: +49-3641949232
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Adjei JA, Aserse AA, Yli-Halla M, Ahiabor BDK, Abaidoo RC, Lindstrom K. Phylogenetically diverse Bradyrhizobium genospecies nodulate Bambara groundnut (Vigna subterranea L. Verdc) and soybean (Glycine max L. Merril) in the northern savanna zones of Ghana. FEMS Microbiol Ecol 2022; 98:fiac043. [PMID: 35404419 PMCID: PMC9329091 DOI: 10.1093/femsec/fiac043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/30/2022] [Accepted: 04/08/2022] [Indexed: 11/25/2022] Open
Abstract
A total of 102 bacterial strains isolated from nodules of three Bambara groundnut and one soybean cultivars grown in nineteen soil samples collected from northern Ghana were characterized using multilocus gene sequence analysis. Based on a concatenated sequence analysis (glnII-rpoB-recA-gyrB-atpD-dnaK), 54 representative strains were distributed in 12 distinct lineages, many of which were placed mainly in the Bradyrhizobium japonicum and Bradyrhizobium elkanii supergroups. Twenty-four of the 54 representative strains belonged to seven putative novel species, while 30 were conspecific with four recognized Bradyrhizobium species. The nodA phylogeny placed all the representative strains in the cosmopolitan nodA clade III. The strains were further separated in seven nodA subclusters with reference strains mainly of African origin. The nifH phylogeny was somewhat congruent with the nodA phylogeny, but both symbiotic genes were mostly incongruent with the core housekeeping gene phylogeny indicating that the strains acquired their symbiotic genes horizontally from distantly related Bradyrhizobium species. Using redundancy analysis, the distribution of genospecies was found to be influenced by the edaphic factors of the respective sampling sites. In general, these results mainly underscore the high genetic diversity of Bambara groundnut-nodulating bradyrhizobia in Ghanaian soils and suggest a possible vast resource of adapted inoculant strains.
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Affiliation(s)
- Josephine A Adjei
- Department of Crop and Soil Sciences, Faculty of Agriculture, Kwame Nkrumah University of Science and Technology, PMB, Kumasi, Ghana
- Faculty of Biological and Environmental Sciences, University of Helsinki, FIN-00014 Helsinki, Finland
- Council for Scientific and Industrial Research, Savanna Agricultural Research Institute, PO Box 52, Tamale, Ghana
| | - Aregu A Aserse
- Faculty of Biological and Environmental Sciences, University of Helsinki, FIN-00014 Helsinki, Finland
| | - Markku Yli-Halla
- Department of Agricultural Sciences, University of Helsinki, FIN-00014 Helsinki, Finland
| | - Benjamin D K Ahiabor
- Council for Scientific and Industrial Research, Savanna Agricultural Research Institute, PO Box 52, Tamale, Ghana
| | - Robert C Abaidoo
- Department of Theoretical and Applied Biology, Kwame Nkrumah University of Science and Technology, PMB, Kumasi, Ghana
- International Institute of Tropical Agriculture, PMB 5320, Ibadan, Nigeria
| | - Kristina Lindstrom
- Faculty of Biological and Environmental Sciences, University of Helsinki, FIN-00014 Helsinki, Finland
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Bian Z, Wang M, Yang Y, Wu Y, Ni H, Yu X, Shi J, Chen H, Bian X, Pan D, Li T, Zhang Y, Yu L, Jiang L, Tu Q. Enhanced growth of ginger plants by an eco- friendly nitrogen-fixing Pseudomonas protegens inoculant in glasshouse fields. J Sci Food Agric 2022; 102:3038-3046. [PMID: 34778957 PMCID: PMC9299100 DOI: 10.1002/jsfa.11645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/11/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Excessive nitrogen (N) fertilization in glasshouse fields greatly increases N loss and fossil-fuel energy consumption resulting in serious environmental risks. Microbial inoculants are strongly emerging as potential alternatives to agrochemicals and offer an eco-friendly fertilization strategy to reduce our dependence on synthetic chemical fertilizers. Effects of a N-fixing strain Pseudomonas protegens CHA0-ΔretS-nif on ginger plant growth, yield, and nutrient uptake, and on earthworm biomass and the microbial community were investigated in glasshouse fields in Shandong Province, northern China. RESULTS Application of CHA0-ΔretS-nif could promote ginger plant development, and significantly increased rhizome yields, by 12.93% and 7.09%, respectively, when compared to uninoculated plants and plants treated with the wild-type bacterial strain. Inoculation of CHA0-ΔretS-nif had little impact on plant phosphorus (P) acquisition, whereas it was associated with enhanced N and potassium (K) acquisition by ginger plants. Moreover, inoculation of CHA0-ΔretS-nif had positive effects on the bacteria population size and the number of earthworms in the rhizosphere. Similar enhanced performances were also found in CHA0-ΔretS-nif-inoculated ginger plants even when the N-fertilizer application rate was reduced by 15%. A chemical N input of 573.8 kg ha-1 with a ginger rhizome yield of 1.31 × 105 kg ha-1 was feasible. CONCLUSIONS The combined application of CHA0-ΔretS-nif and a reduced level of N-fertilizers can be employed in glasshouse ginger production for the purpose of achieving high yields while at the same time reducing the inorganic-N pollution from traditional farming practices. © 2021 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Zhilong Bian
- Helmholtz International Laboratory for Anti‐Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial TechnologyShandong UniversityQingdaoChina
| | - Mei Wang
- Institute of Agricultural Resources and EnvironmentShandong Academy of Agricultural SciencesJinanChina
| | - Yan Yang
- Institute of Agricultural Resources and EnvironmentShandong Academy of Agricultural SciencesJinanChina
| | - Yuxia Wu
- Helmholtz International Laboratory for Anti‐Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial TechnologyShandong UniversityQingdaoChina
| | - Haiping Ni
- Helmholtz International Laboratory for Anti‐Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial TechnologyShandong UniversityQingdaoChina
| | - Xu Yu
- Institute of Agricultural Resources and EnvironmentShandong Academy of Agricultural SciencesJinanChina
| | - Jing Shi
- Institute of Agricultural Resources and EnvironmentShandong Academy of Agricultural SciencesJinanChina
| | - Hanna Chen
- Helmholtz International Laboratory for Anti‐Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial TechnologyShandong UniversityQingdaoChina
| | - Xiaoying Bian
- Helmholtz International Laboratory for Anti‐Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial TechnologyShandong UniversityQingdaoChina
| | - Deng Pan
- Helmholtz International Laboratory for Anti‐Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial TechnologyShandong UniversityQingdaoChina
| | - Tao Li
- Soil and Fertilizer Station of Shandong ProvinceShandong Provincial Department of AgricultureJinanChina
| | - Youming Zhang
- Helmholtz International Laboratory for Anti‐Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial TechnologyShandong UniversityQingdaoChina
| | - Lei Yu
- Soil and Fertilizer Station of Shandong ProvinceShandong Provincial Department of AgricultureJinanChina
| | - Lihua Jiang
- Institute of Agricultural Resources and EnvironmentShandong Academy of Agricultural SciencesJinanChina
| | - Qiang Tu
- Helmholtz International Laboratory for Anti‐Infectives, Shandong University–Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial TechnologyShandong UniversityQingdaoChina
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Darnajoux R, Bradley R, Bellenger JP. In Vivo Temperature Dependency of Molybdenum and Vanadium Nitrogenase Activity in the Heterocystous Cyanobacteria Anabaena variabilis. Environ Sci Technol 2022; 56:2760-2769. [PMID: 35073047 DOI: 10.1021/acs.est.1c05279] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The reduction of atmospheric dinitrogen by nitrogenase is a key component of terrestrial nitrogen cycling. Nitrogenases exist in several isoforms named after the metal present within their active center: the molybdenum (Mo), the vanadium (V), and the iron (Fe)-only nitrogenase. While earlier in vitro studies hint that the relative contribution of V nitrogenase to total BNF could be temperature-dependent, the effect of temperature on in vivo activity remains to be investigated. In this study, we characterize the in vivo effect of temperature (3-42 °C) on the activities of Mo nitrogenase and V nitrogenase in the heterocystous cyanobacteria Anabaena variabilis ATTC 29413 using the acetylene reduction assay by cavity ring-down absorption spectroscopy. We demonstrate that V nitrogenase becomes as efficient as Mo nitrogenase at temperatures below 10-15 °C. At temperatures above 22 °C, BNF seems to be limited by O2 availability to respiration in both enzymes. Furthermore, Anabaena variabilis cultures grown in Mo or V media achieved similar growth rates at temperatures below 20 °C. Considering the average temperature on earth is 15 °C, our findings further support the role of V nitrogenase as a viable backup enzymatic system for BNF in natural ecosystems.
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Affiliation(s)
- Romain Darnajoux
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
- Département de Biologie, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
- Centre Sève, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
| | - Robert Bradley
- Département de Biologie, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
- Centre Sève, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
| | - Jean-Philippe Bellenger
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
- Centre Sève, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
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Yang Z, Du H, Xing X, Li W, Kong Y, Li X, Zhang C. A small heat shock protein, GmHSP17.9, from nodule confers symbiotic nitrogen fixation and seed yield in soybean. Plant Biotechnol J 2022; 20:103-115. [PMID: 34487637 PMCID: PMC8710831 DOI: 10.1111/pbi.13698] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 08/11/2021] [Accepted: 08/26/2021] [Indexed: 05/27/2023]
Abstract
Legume-rhizobia symbiosis enables biological nitrogen fixation to improve crop production for sustainable agriculture. Small heat shock proteins (sHSPs) are involved in multiple environmental stresses and plant development processes. However, the role of sHSPs in nodule development in soybean remains largely unknown. In the present study, we identified a nodule-localized sHSP, called GmHSP17.9, in soybean, which was markedly up-regulated during nodule development. GmHSP17.9 was specifically expressed in the infected regions of the nodules. GmHSP17.9 overexpression and RNAi in transgenic composite plants and loss of function in CRISPR-Cas9 gene-editing mutant plants in soybean resulted in remarkable alterations in nodule number, nodule fresh weight, nitrogenase activity, contents of poly β-hydroxybutyrate bodies (PHBs), ureide and total nitrogen content, which caused significant changes in plant growth and seed yield. GmHSP17.9 was also found to act as a chaperone for its interacting partner, GmNOD100, a sucrose synthase in soybean nodules which was also preferentially expressed in the infected zone of nodules, similar to GmHSP17.9. Functional analysis of GmNOD100 in composite transgenic plants revealed that GmNOD100 played an essential role in soybean nodulation. The hsp17.9 lines showed markedly more reduced sucrose synthase activity, lower contents of UDP-glucose and acetyl coenzyme A (acetyl-CoA), and decreased activity of succinic dehydrogenase (SDH) in the tricarboxylic acid (TCA) cycle in nodules due to the missing interaction with GmNOD100. Our findings reveal an important role and an unprecedented molecular mechanism of sHSPs in nodule development and nitrogen fixation in soybean.
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Affiliation(s)
- Zhanwu Yang
- North China Key Laboratory for Germplasm Resources of Education MinistryCollege of AgronomyHebei Agricultural UniversityBaodingChina
| | - Hui Du
- North China Key Laboratory for Germplasm Resources of Education MinistryCollege of AgronomyHebei Agricultural UniversityBaodingChina
| | - Xinzhu Xing
- North China Key Laboratory for Germplasm Resources of Education MinistryCollege of AgronomyHebei Agricultural UniversityBaodingChina
| | - Wenlong Li
- North China Key Laboratory for Germplasm Resources of Education MinistryCollege of AgronomyHebei Agricultural UniversityBaodingChina
| | - Youbin Kong
- North China Key Laboratory for Germplasm Resources of Education MinistryCollege of AgronomyHebei Agricultural UniversityBaodingChina
| | - Xihuan Li
- North China Key Laboratory for Germplasm Resources of Education MinistryCollege of AgronomyHebei Agricultural UniversityBaodingChina
| | - Caiying Zhang
- North China Key Laboratory for Germplasm Resources of Education MinistryCollege of AgronomyHebei Agricultural UniversityBaodingChina
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Etto RM, Jesus EDC, Cruz LM, Schneider BSF, Tomachewski D, Urrea-Valencia S, Gonçalves DRP, Galvão F, Ayub RA, Curcio GR, Steffens MBR, Galvão CW. Influence of environmental factors on the tropical peatlands diazotrophic communities from the Southern Brazilian Atlantic Rain Forest. Lett Appl Microbiol 2021; 74:543-554. [PMID: 34951701 DOI: 10.1111/lam.13638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 10/10/2021] [Accepted: 12/17/2021] [Indexed: 11/26/2022]
Abstract
The tropical peatlands of southern Brazil are essential for the maintenance of the Atlantic Rain Forest, one of the 25 hotspots of biodiversity in the world. Although diazotrophic microorganisms are essential for the maintenance of this nitrogen limited ecosystem, so far studies have focused only on microorganisms involved in the carbon cycle. In this work, peat samples were collected from three tropical peatland regions during dry and rainy seasons and their chemical and microbial characteristics were evaluated. Our results showed that the structure of the diazotrophic communities in the Brazilian tropical peatlands differs in the evaluated seasons. The abundance of the genus Bradyrhizobium showed to be affected by rainfall and peat pH. Despite the shifts of the nitrogen fixing population in the tropical peatland caused by seasonality it showed to be constantly dominated by α-Proteobacteria followed by Cyanobacteria. In addition, more than 50% of nifH gene sequences have not been classified, indicating the necessity for more studies in tropical peatland, since the reduction of N supply in the peatlands stimulates the recalcitrant organic matter decomposition performed by peatland microorganisms, influencing the C stock.
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Affiliation(s)
- Rafael Mazer Etto
- Microbial Molecular Biology Laboratory, State University of Ponta Grossa, CEP, 84030-900, Ponta Grossa - PR, Brazil
| | | | - Leonardo Magalhães Cruz
- Nucleus of Nitrogen Fixation, Federal University of Paraná, CEP, 81531-980, Curitiba - PR, Brazil
| | | | - Douglas Tomachewski
- Microbial Molecular Biology Laboratory, State University of Ponta Grossa, CEP, 84030-900, Ponta Grossa - PR, Brazil
| | - Salomé Urrea-Valencia
- Microbial Molecular Biology Laboratory, State University of Ponta Grossa, CEP, 84030-900, Ponta Grossa - PR, Brazil
| | - Daniel Ruiz Potma Gonçalves
- Microbial Molecular Biology Laboratory, State University of Ponta Grossa, CEP, 84030-900, Ponta Grossa - PR, Brazil
| | - Franklin Galvão
- Forest Ecology Laboratory, Universidade Federal do Paraná, CEP, 80210-170, Curitiba - PR, Brazil
| | - Ricardo Antônio Ayub
- Applied Biotechnology Laboratory, State University of Ponta Grossa, CEP, 84030-900, Ponta Grossa - PR, Brazil
| | | | | | - Carolina Weigert Galvão
- Microbial Molecular Biology Laboratory, State University of Ponta Grossa, CEP, 84030-900, Ponta Grossa - PR, Brazil
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Wen A, Havens KL, Bloch SE, Shah N, Higgins DA, Davis-Richardson AG, Sharon J, Rezaei F, Mohiti-Asli M, Johnson A, Abud G, Ane JM, Maeda J, Infante V, Gottlieb SS, Lorigan JG, Williams L, Horton A, McKellar M, Soriano D, Caron Z, Elzinga H, Graham A, Clark R, Mak SM, Stupin L, Robinson A, Hubbard N, Broglie R, Tamsir A, Temme K. Enabling Biological Nitrogen Fixation for Cereal Crops in Fertilized Fields. ACS Synth Biol 2021; 10:3264-3277. [PMID: 34851109 DOI: 10.1021/acssynbio.1c00049] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Agricultural productivity relies on synthetic nitrogen fertilizers, yet half of that reactive nitrogen is lost to the environment. There is an urgent need for alternative nitrogen solutions to reduce the water pollution, ozone depletion, atmospheric particulate formation, and global greenhouse gas emissions associated with synthetic nitrogen fertilizer use. One such solution is biological nitrogen fixation (BNF), a component of the complex natural nitrogen cycle. BNF application to commercial agriculture is currently limited by fertilizer use and plant type. This paper describes the identification, development, and deployment of the first microbial product optimized using synthetic biology tools to enable BNF for corn (Zea mays) in fertilized fields, demonstrating the successful, safe commercialization of root-associated diazotrophs and realizing the potential of BNF to replace and reduce synthetic nitrogen fertilizer use in production agriculture. Derived from a wild nitrogen-fixing microbe isolated from agricultural soils, Klebsiella variicola 137-1036 ("Kv137-1036") retains the capacity of the parent strain to colonize corn roots while increasing nitrogen fixation activity 122-fold in nitrogen-rich environments. This technical milestone was then commercialized in less than half of the time of a traditional biological product, with robust biosafety evaluations and product formulations contributing to consumer confidence and ease of use. Tested in multi-year, multi-site field trial experiments throughout the U.S. Corn Belt, fields grown with Kv137-1036 exhibited both higher yields (0.35 ± 0.092 t/ha ± SE or 5.2 ± 1.4 bushels/acre ± SE) and reduced within-field yield variance by 25% in 2018 and 8% in 2019 compared to fields fertilized with synthetic nitrogen fertilizers alone. These results demonstrate the capacity of a broad-acre BNF product to fix nitrogen for corn in field conditions with reliable agronomic benefits.
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Affiliation(s)
- Amy Wen
- Pivot Bio, Berkeley, California 94710, United States
| | | | - Sarah E. Bloch
- Morrison & Foerster LLP, San Francisco, California 94105, United States
| | - Neal Shah
- Pivot Bio, Berkeley, California 94710, United States
| | | | | | - Judee Sharon
- University of Minnesota─Twin Cities, Minneapolis, Minnesota 55401, United States
| | | | | | | | - Gabriel Abud
- Tempo Automation, San Francisco, California 94103, United States
| | - Jean-Michel Ane
- University of Minnesota─Twin Cities, Minneapolis, Minnesota 55401, United States
| | - Junko Maeda
- University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Valentina Infante
- University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | | | | | | | - Alana Horton
- Pivot Bio, Berkeley, California 94710, United States
| | | | | | - Zoe Caron
- Pivot Bio, Berkeley, California 94710, United States
| | | | - Ashley Graham
- Olema Oncology, San Francisco, California 94107, United States
| | | | - San-Ming Mak
- Pivot Bio, Berkeley, California 94710, United States
| | - Laura Stupin
- Pivot Bio, Berkeley, California 94710, United States
| | | | | | | | - Alvin Tamsir
- Pivot Bio, Berkeley, California 94710, United States
| | - Karsten Temme
- Pivot Bio, Berkeley, California 94710, United States
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45
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Yin J, Sui Z, Li Y, Yang H, Yuan L, Huang J. A new function of white-rot fungi Ceriporia lacerata HG2011: improvement of biological nitrogen fixation of broad bean (Vicia faba). Microbiol Res 2021; 256:126939. [PMID: 34923239 DOI: 10.1016/j.micres.2021.126939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 11/24/2021] [Accepted: 12/02/2021] [Indexed: 11/25/2022]
Abstract
The inoculation of plant growth-promoting microbes with multifarious functions is a simple, economic, and effective way to improve nodulation and biological nitrogen fixation (BNF) of legumes. Broad bean (Vicia faba) is commonly grown in the winter in tropics and subtropics for increasing soil N and farmers' income. The new functions of Ceriporia lacerata HG2011, a white-rot fungus, in nodulation and BNF (measured by 15N natural abundance) were studied with the broad bean in liquid culture, soil incubation, and greenhouse pot experiments. The results showed that this fungus released IAA, GA, and Fe-binding ligands into culture solutions, increased lateral roots and root surfaces, and mobilized phosphorus and iron into bioavailable forms in the soil. These performances may be beneficial to nodulation and BNF. The indigenous rhizobia that infect broad been were long-lived in the experimental soil. The efficiency of exogenous rhizobium inoculation may be unsatisfactory in the soils for frequently growing broad beans because of fierce competition with native rhizobia. Compared with no inoculation, the fungal inoculant increased nutrient (nitrogen, phosphorus, and potassium) availability in the fertilized soil, nodule mass, and plant BNF and nutrient uptake, leading to higher plant biomass and grain yield. Thus, C. lacerata HG2011 provided more potential sites for rhizobia infection in nodulation, increased nodule size, and improved nodule mineral nutrient (particularly phosphorus and iron) and photosynthate acquisitions, resulting in better nodulation and increased plant BNF. These significant findings firstly proved a new function of C. lacerata HG2011 in improving the inoculation and BNF of legume plants.
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Affiliation(s)
- Jie Yin
- College of Resources and Environment, Southwest University, Chongqing, 400716, China.
| | - Zongming Sui
- College of Resources and Environment, Southwest University, Chongqing, 400716, China.
| | - Yong Li
- College of Resources and Environment, Southwest University, Chongqing, 400716, China.
| | - Hongjun Yang
- College of Resources and Environment, Southwest University, Chongqing, 400716, China.
| | - Ling Yuan
- College of Resources and Environment, Southwest University, Chongqing, 400716, China.
| | - Jianguo Huang
- College of Resources and Environment, Southwest University, Chongqing, 400716, China.
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46
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Gatsios A, Ntatsi G, Celi L, Said-Pullicino D, Tampakaki A, Savvas D. Legume-Based Mobile Green Manure Can Increase Soil Nitrogen Availability and Yield of Organic Greenhouse Tomatoes. Plants (Basel) 2021; 10:plants10112419. [PMID: 34834782 PMCID: PMC8618399 DOI: 10.3390/plants10112419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/03/2021] [Accepted: 11/06/2021] [Indexed: 06/13/2023]
Abstract
Information about the availability of soil mineral nitrogen (N) in organic greenhouse tomatoes after the application of mobile green manure (MGM), and its impact on plant nutrient status and yield is scarce. Considering this knowledge gap, the effects of legume biomass from faba beans that are cultivated outdoors (FAB), or from feed-grade alfalfa pellets at two different doses (AAL = 330 g m-2; AAH = 660 g m-2) that were applied as MGM on the nutrition and yield of an organic greenhouse crop of tomatoes were evaluated. All of the MGM treatments increased the mineral N concentrations in the soil throughout the cropping period, and the total N concentration in tomato leaves when compared to the untreated control. FAB and AAH treatments had a stronger impact than AAL in all of the measured parameters. In addition, AAL, AAH, and FAB treatments increased the yield compared to the control by 19%, 33%, and 36%, respectively. The application of MGM, either as faba bean fresh biomass or as alfalfa dry pellets, in organic greenhouse tomatoes significantly increased the plant available soil N, improved N nutrition, and enhanced the fruit yield. However, the N mineralization rates after the MGM application were excessive during the initial cropping stages, followed by a marked decrease thereafter. This may impose an N deficiency during the late cropping period.
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Affiliation(s)
- Anastasios Gatsios
- Laboratory of Vegetable Crops, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece; (A.G.); (G.N.)
| | - Georgia Ntatsi
- Laboratory of Vegetable Crops, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece; (A.G.); (G.N.)
| | - Luisella Celi
- Department of Agricultural, Forest and Food Sciences, University of Torino, 10095 Grugliasco, TO, Italy; (L.C.); (D.S.-P.)
| | - Daniel Said-Pullicino
- Department of Agricultural, Forest and Food Sciences, University of Torino, 10095 Grugliasco, TO, Italy; (L.C.); (D.S.-P.)
| | - Anastasia Tampakaki
- Laboratory of Biological and Biotechnological Applications, Department of Agriculture, School of Agricultural Sciences, Hellenic Mediterranean University, 71004 Heraklion, Greece;
| | - Dimitrios Savvas
- Laboratory of Vegetable Crops, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece; (A.G.); (G.N.)
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Solaiyappan Mani S, Reinhold-Hurek B. RNA-Seq Provides New Insights into the Gene Expression Changes in Azoarcus olearius BH72 under Nitrogen-Deficient and Replete Conditions beyond the Nitrogen Fixation Process. Microorganisms 2021; 9:1888. [PMID: 34576783 DOI: 10.3390/microorganisms9091888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 08/26/2021] [Accepted: 08/30/2021] [Indexed: 11/17/2022] Open
Abstract
Azoarcus olearius BH72 is an endophyte capable of biological nitrogen fixation (BNF) and of supplying nitrogen to its host plant. Our previous microarray approach provided insights into the transcriptome of strain BH72 under N2-fixation in comparison to ammonium-grown conditions, which already indicated the induction of genes not related to the BNF process. Due to the known limitations of the technique, we might have missed additional differentially expressed genes (DEGs). Thus, we used directional RNA-Seq to better comprehend the transcriptional landscape under these growth conditions. RNA-Seq detected almost 24% of the annotated genes to be regulated, twice the amount identified by microarray. In addition to confirming entire regulated operons containing known DEGs, the new approach detected the induction of genes involved in carbon metabolism and flagellar and twitching motility. This may support N2-fixation by increasing energy production and by finding suitable microaerobic niches. On the other hand, energy expenditures were reduced by suppressing translation and vitamin biosynthesis. Nonetheless, strain BH72 does not appear to be content with N2-fixation but is primed for alternative economic N-sources, such as nitrate, urea or amino acids; a strong gene induction of machineries for their uptake and assimilation was detected. RNA-Seq has thus provided a better understanding of a lifestyle under limiting nitrogen sources by elucidating hitherto unknown regulated processes.
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Ospina-Betancourth C, Acharya K, Allen B, Head IM, Sanabria J, Curtis TP. Valorization of pulp and paper industry wastewater using sludge enriched with nitrogen-fixing bacteria. Water Environ Res 2021; 93:1734-1747. [PMID: 33765365 DOI: 10.1002/wer.1561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/22/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
Nitrogen-fixing bacteria (NFB) can reduce nitrogen at ambient pressure and temperature. In this study, we treated effluent from a paper mill in sequencing batch reactors (SBRs) and monitored the abundance and activity of NFB with a view to producing a sludge that could work as a biofertilizer. Four reactors were inoculated with activated sludge enriched with NFB and fed with a high C/N waste (100:0.5) from a paper mill. Though the reactors were able to reduce the organic load of the wastewater by up to 89%, they did not have any nitrogen-fixing activity and showed a decrease in the putative number of NFB (quantified with qPCR). The most abundant species in the reactors treating high C/N paper mill wastewater was identified by Illumina MiSeq 16S rRNA gene amplicon sequencing as Methyloversatilis sp. (relative abundance of 4.4%). Nitrogen fixation was observed when the C/N ratio was increased by adding sucrose. We suspect that real-world biological nitrogen fixation (BNF) will only occur where there is a C/N ratio ≤100:0.07. Consequently, operators should actively avoid adding or allowing nitrogen in the waste streams if they wish to valorize their sludge and reduce running costs. PRACTITIONER POINTS: Efficient biological wastewater treatment of low nitrogen paper mill effluent was achieved without nutrient supplementation. The sludge was still capable of fixing nitrogen although this process was not observed in the wastewater treatment system. This high C/N wastewater treatment technology could be used with effluents from cassava flour, olive oil, wine and dairy industries.
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Affiliation(s)
| | - Kishor Acharya
- School of Engineering, Newcastle University, Newcastle upon Tyne, UK
| | - Ben Allen
- School of Engineering, Newcastle University, Newcastle upon Tyne, UK
| | - Ian M Head
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - Janeth Sanabria
- Environmental Microbiology and Biotechnology Laboratory, Engineering School of Environmental & Natural Resources, Engineering Faculty, Universidad del Valle, Cali, Colombia
| | - Thomas P Curtis
- School of Engineering, Newcastle University, Newcastle upon Tyne, UK
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49
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Mendoza-Suárez M, Andersen SU, Poole PS, Sánchez-Cañizares C. Competition, Nodule Occupancy, and Persistence of Inoculant Strains: Key Factors in the Rhizobium-Legume Symbioses. Front Plant Sci 2021; 12:690567. [PMID: 34489993 PMCID: PMC8416774 DOI: 10.3389/fpls.2021.690567] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Accepted: 07/19/2021] [Indexed: 05/06/2023]
Abstract
Biological nitrogen fixation by Rhizobium-legume symbioses represents an environmentally friendly and inexpensive alternative to the use of chemical nitrogen fertilizers in legume crops. Rhizobial inoculants, applied frequently as biofertilizers, play an important role in sustainable agriculture. However, inoculants often fail to compete for nodule occupancy against native rhizobia with inferior nitrogen-fixing abilities, resulting in low yields. Strains with excellent performance under controlled conditions are typically selected as inoculants, but the rates of nodule occupancy compared to native strains are rarely investigated. Lack of persistence in the field after agricultural cycles, usually due to the transfer of symbiotic genes from the inoculant strain to naturalized populations, also limits the suitability of commercial inoculants. When rhizobial inoculants are based on native strains with a high nitrogen fixation ability, they often have superior performance in the field due to their genetic adaptations to the local environment. Therefore, knowledge from laboratory studies assessing competition and understanding how diverse strains of rhizobia behave, together with assays done under field conditions, may allow us to exploit the effectiveness of native populations selected as elite strains and to breed specific host cultivar-rhizobial strain combinations. Here, we review current knowledge at the molecular level on competition for nodulation and the advances in molecular tools for assessing competitiveness. We then describe ongoing approaches for inoculant development based on native strains and emphasize future perspectives and applications using a multidisciplinary approach to ensure optimal performance of both symbiotic partners.
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Affiliation(s)
| | - Stig U. Andersen
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Philip S. Poole
- Department of Plant Sciences, University of Oxford, Oxford, United Kingdom
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50
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Abstract
Plant-growth-promoting bacteria (PGPB) stimulate plant growth through diverse mechanisms. In addition to biological nitrogen fixation, diazotrophic PGPB can improve nutrient uptake efficiency from the soil, produce and release phytohormones to the host, and confer resistance against pathogens. The genetic determinants that drive the success of biological nitrogen fixation in nonlegume plants are understudied. These determinants include recognition and signaling pathways, bacterial colonization, and genotype specificity between host and bacteria. This review presents recent discoveries of how nitrogen-fixing PGPB interact with cereals and promote plant growth. We suggest adopting an experimental model system, such as the Setaria-diazotrophic bacteria association, as a reliable way to better understand the associated mechanisms and, ultimately, increase the use of PGPB inoculants for sustainable agriculture.[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
| | - Fernanda Plucani do Amaral
- Divisions of Plant Sciences and Biochemistry, C. S. Bond Life Science Center, University of Missouri, Columbia, MO, U.S.A
| | - Jean-Michel Ané
- Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, U.S.A
| | - Gary Stacey
- Divisions of Plant Sciences and Biochemistry, C. S. Bond Life Science Center, University of Missouri, Columbia, MO, U.S.A
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