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Muhammad M, Wahab A, Waheed A, Mohamed HI, Hakeem KR, Li L, Li WJ. Harnessing bacterial endophytes for environmental resilience and agricultural sustainability. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 368:122201. [PMID: 39142107 DOI: 10.1016/j.jenvman.2024.122201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 08/01/2024] [Accepted: 08/10/2024] [Indexed: 08/16/2024]
Abstract
In the current era of environmental disasters and the necessity of sustainable development, bacterial endophytes have gotten attention for their role in improving agricultural productivity and ecological sustainability. This review explores the multifaceted contributions of bacterial endophytes to plant health and ecosystem sustainability. Bacterial endophytes are invaluable sources of bioactive compounds, promising breakthroughs in medicine and biotechnology. They also serve as natural biocontrol agents, reducing the need for synthetic fertilizers and fostering environmentally friendly agricultural practices. It provides eco-friendly solutions that align with the necessity of sustainability since they can improve pest management, increase crop resilience, and facilitate agricultural production. This review also underscores bacterial endophytes' contribution to promoting sustainable and green industrial productions. It also presented how incorporating these microorganisms into diverse industrial sectors can harmonize humankind with ecological stability. The potential of bacterial endophytes has been largely untapped, presenting an opportunity for pioneering advancements in sustainable industrial applications. Their importance caught attention as they provided innovative solutions to the challenging problems of the new era. This review sheds light on the remarkable potential of bacterial endophytes in various industrial sectors. Further research is imperative to discover their multifaceted potential. It will be essential to delve deeper into their mechanisms, broaden their uses, and examine their long-term impacts.
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Affiliation(s)
- Murad Muhammad
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Xinjiang Key Laboratory of Biodiversity Conservation and Application in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, China.
| | - Abdul Wahab
- University of Chinese Academy of Sciences, Beijing, 100049, China; Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Abdul Waheed
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; National Key Laboratory of Ecological Security and Resource Utilization in Arid Areas, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Xinjiang Key Laboratory of Biodiversity Conservation and Application in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, China
| | - Heba Ibrahim Mohamed
- Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, Cairo, 11341, Egypt
| | - Khalid Rehman Hakeem
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia; Princess Dr. Najla Bint Saud Al-Saud Center for Excellence Research in Biotechnology, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Department of Public Health, Daffodil International University, Dhaka, 1341, Bangladesh; University Centre for Research & Development, Chandigarh University, Mohali, Punjab, 140413, India
| | - Li Li
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Xinjiang Key Laboratory of Biodiversity Conservation and Application in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, China
| | - Wen-Jun Li
- State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, China.
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Meyer E, Stoffel SCG, de Almeida AFN, do Amaral Scarsanella J, Vieira AS, Ventura BS, Canei AD, Bortolini JG, de Faria SM, Soares CRFS, Lovato PE. Rhizophagus intraradices and Azospirillum brasilense improve growth of herbaceous plants and soil biological activity in revegetation of a recovering coal-mining area. Braz J Microbiol 2024; 55:2827-2837. [PMID: 38769246 PMCID: PMC11405746 DOI: 10.1007/s42770-024-01390-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 05/14/2024] [Indexed: 05/22/2024] Open
Abstract
We assessed, in a field experiment, the effects of arbuscular mycorrhizal fungi (Rhizophagus intraradices) and plant growth-promoting bacteria (Azospirillum brasilense) on the soil biological activity and the growth of key pioneer species used in the revegetation of coal-mining areas undergoing recovery. We applied four inoculation treatments to the pioneer plant species (Lablab purpureus, Paspalum notatum, Crotalaria juncea, Neonotonia wightii, Stylosanthes guianensis, Andropogon gayanus and Trifolium repens) used in the recovery process: NI (Control - Non-inoculated), AZO (A. brasilense), AMF (R. intraradices), and co-inoculation of AZO and AMF. On the 75th and 180th days, we measured plant dry mass, mycorrhizal colonization, N and P concentration, and accumulation in plant tissue. We collected soil to quantify glomalin content and soil enzyme activity. After 180 days, we did a phytosociological characterization of the remaining spontaneous plants.The both microorganisms, singly or co-inoculated, promoted increases in different fractions of soil glomalin, acid phosphatase activity, and fluorescein diacetate activity at 75 and 180 days. The inoculation was linked to higher plant biomass production (62-89%) and increased plant P and N accumulation by 34-75% and 70-85% at 180 days, compared with the non-inoculated treatment. Among the pioneer species sown Crotalaria juncea produced the highest biomass at the 75th and 180th days (67% and 76% of all biomass), followed by Lablab purpureus (3% and 0.5%), while the other species failed to establish. At 180 days, we observed twenty spontaneous plant species growing in the area, primarily from the Poaceae family (74%). That suggests that the pioneer species present in the area do not hinder the ecological succession process. Inoculation of R. intraradices and A. brasilense, isolated or combined, increases soil biological activity, growth, and nutrient accumulation in key pioneer plant species, indicating the potential of that technique for the recovery of lands degraded by coal mining.
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Affiliation(s)
- Edenilson Meyer
- Centro de Ciências Agrárias, Departamento de Engenharia Rural, Universidade Federal de Santa Catarina (UFSC), 88034-000, Florianópolis, SC, Brasil.
| | - Shantau Camargo Gomes Stoffel
- Centro de Ciências Biológicas, Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brasil
| | - Anna Flávia Neri de Almeida
- Centro de Ciências Agrárias, Departamento de Engenharia Rural, Universidade Federal de Santa Catarina (UFSC), 88034-000, Florianópolis, SC, Brasil
| | - Juliana do Amaral Scarsanella
- Centro de Ciências Agrárias, Departamento de Engenharia Rural, Universidade Federal de Santa Catarina (UFSC), 88034-000, Florianópolis, SC, Brasil
| | - André Steiner Vieira
- Centro de Ciências Biológicas, Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brasil
| | - Barbara Santos Ventura
- Centro de Ciências Agrárias, Departamento de Engenharia Rural, Universidade Federal de Santa Catarina (UFSC), 88034-000, Florianópolis, SC, Brasil
| | - Andressa Danielli Canei
- Centro de Ciências Biológicas, Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brasil
| | - Juliana Gress Bortolini
- Centro de Ciências Agrárias, Departamento de Engenharia Rural, Universidade Federal de Santa Catarina (UFSC), 88034-000, Florianópolis, SC, Brasil
| | | | - Cláudio Roberto Fonseca Sousa Soares
- Centro de Ciências Biológicas, Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina (UFSC), 88040-900, Florianópolis, SC, Brasil
| | - Paulo Emílio Lovato
- Centro de Ciências Agrárias, Departamento de Engenharia Rural, Universidade Federal de Santa Catarina (UFSC), 88034-000, Florianópolis, SC, Brasil
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Andreata MFL, Afonso L, Niekawa ETG, Salomão JM, Basso KR, Silva MCD, Alves LC, Alarcon SF, Parra MEA, Grzegorczyk KG, Chryssafidis AL, Andrade G. Microbial Fertilizers: A Study on the Current Scenario of Brazilian Inoculants and Future Perspectives. PLANTS (BASEL, SWITZERLAND) 2024; 13:2246. [PMID: 39204682 PMCID: PMC11360115 DOI: 10.3390/plants13162246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 08/02/2024] [Accepted: 08/06/2024] [Indexed: 09/04/2024]
Abstract
The increasing need for sustainable agricultural practices, combined with the demand for enhanced crop productivity, has led to a growing interest in utilizing microorganisms for biocontrol of diseases and pests, as well as for growth promotion. In Brazilian agriculture, the use of plant growth-promoting rhizobacteria (PGPR) and plant growth-promoting fungi (PGPF) has become increasingly prevalent, with a corresponding rise in the number of registered microbial inoculants each year. PGPR and PGPF occupy diverse niches within the rhizosphere, playing a crucial role in soil nutrient cycling and influencing a wide range of plant physiological processes. This review examines the primary mechanisms employed by these microbial agents to promote growth, as well as the strategy of co-inoculation to enhance product efficacy. Furthermore, we provide a comprehensive analysis of the microbial inoculants currently available in Brazil, detailing the microorganisms accessible for major crops, and discuss the market's prospects for the research and development of novel products in light of current challenges faced in the coming years.
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Affiliation(s)
- Matheus F. L. Andreata
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | - Leandro Afonso
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | - Erika T. G. Niekawa
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | - Julio M. Salomão
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | - Kawany Roque Basso
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | - Maria Clara D. Silva
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | - Leonardo Cruz Alves
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | - Stefani F. Alarcon
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | - Maria Eugenia A. Parra
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | - Kathlen Giovana Grzegorczyk
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
| | | | - Galdino Andrade
- Microbial Ecology Laboratory, Department of Microbiology, State University of Londrina, Londrina 86057-970, Brazil; (M.F.L.A.); (L.A.); (E.T.G.N.); (J.M.S.); (K.R.B.); (M.C.D.S.); (L.C.A.); (S.F.A.); (M.E.A.P.); (K.G.G.)
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Sete da Cruz RM, Ferreira H, Jaski JM, Vieira MCE, Pinc MM, de Souza SGH, Alberton O. Growth and Phytochemistry of Cymbopogon citratus Stapf Inoculated with Plant Growth-Promoting Bacteria under Different Lead Levels. PLANTS (BASEL, SWITZERLAND) 2024; 13:944. [PMID: 38611474 PMCID: PMC11013308 DOI: 10.3390/plants13070944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/13/2024] [Accepted: 03/20/2024] [Indexed: 04/14/2024]
Abstract
This study aimed to investigate the phytochemistry of lemongrass (Cymbopogon citratus) inoculated with Azospirillum brasilense and grown in lead (Pb)-contaminated soil to assess its responses to inoculation under different Pb levels. The experimental design was completely randomized in a 2 × 5 factorial scheme: two levels of A. brasilense (absence or presence) and five Pb levels. After four months of treatment, the following were analyzed: total and reducing sugars, total phenolic content, flavonoids, antioxidant activity, antioxidant enzymes, proline, and essential oil (EO) content and composition. Soil Pb levels and A. brasilense inoculation affected phytochemicals in lemongrass plants. Azospirillum inoculation reduced total sugars in the roots at all soil Pb levels, while increasing Pb levels favored a rise in sugar contents. There was an increase in flavonoid content in treatments associated with Pb and inoculated with A. brasilense. Antioxidant capacity was lower at lower Pb levels, regardless of bacterial inoculation. Enzymatic response was mainly affected by Pb concentrations between 50 and 100 mg kg-1 soil. EO content was influenced by soil Pb levels, with higher EO production at 500 mg Pb kg-1 soil and without A. brasilense inoculation. Overall, lemongrass cultivation in Pb-contaminated areas can be an alternative to phytoremediation and EO production for the industry.
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Affiliation(s)
- Rayane Monique Sete da Cruz
- Biochemistry and Microbiology Department, Biosciences Institute of Rio Claro, Paulista State University (UNESP), Rio Claro 13506-900, Brazil;
- Postgraduate Program in Biotechnology Applied to Agriculture, Universidade Paranaense (UNIPAR), Umuarama 87502-210, Brazil; (H.F.); (M.M.P.); (S.G.H.d.S.)
| | - Henrique Ferreira
- Postgraduate Program in Biotechnology Applied to Agriculture, Universidade Paranaense (UNIPAR), Umuarama 87502-210, Brazil; (H.F.); (M.M.P.); (S.G.H.d.S.)
| | - Jonas Marcelo Jaski
- Agronomy Department, Centro Universitário Ingá—Uningá, Maringá 87035-510, Brazil;
| | - Marcelo Coelho Esperança Vieira
- Postgraduate Program in Medicinal Plants and Herbal Medicines in Basic Health Care, Universidade Paranaense (UNIPAR), Umuarama 87502-210, Brazil;
| | - Mariana Moraes Pinc
- Postgraduate Program in Biotechnology Applied to Agriculture, Universidade Paranaense (UNIPAR), Umuarama 87502-210, Brazil; (H.F.); (M.M.P.); (S.G.H.d.S.)
| | - Silvia Graciele Hülse de Souza
- Postgraduate Program in Biotechnology Applied to Agriculture, Universidade Paranaense (UNIPAR), Umuarama 87502-210, Brazil; (H.F.); (M.M.P.); (S.G.H.d.S.)
| | - Odair Alberton
- Postgraduate Program in Biotechnology Applied to Agriculture, Universidade Paranaense (UNIPAR), Umuarama 87502-210, Brazil; (H.F.); (M.M.P.); (S.G.H.d.S.)
- Postgraduate Program in Medicinal Plants and Herbal Medicines in Basic Health Care, Universidade Paranaense (UNIPAR), Umuarama 87502-210, Brazil;
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Wang X, He SW, He Q, Ju ZC, Ma YN, Wang Z, Han JC, Zhang XX. Early inoculation of an endophyte alters the assembly of bacterial communities across rice plant growth stages. Microbiol Spectr 2023; 11:e0497822. [PMID: 37655928 PMCID: PMC10580921 DOI: 10.1128/spectrum.04978-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 07/07/2023] [Indexed: 09/02/2023] Open
Abstract
The core endophytes of plants are regarded as promising resources in future agroecosystems. How they affect the assembly of rice-related bacterial communities after early inoculation remains unclear. Here, we examined bacterial communities across 148 samples, including bulk and rhizosphere soils, sterilized roots, stems, and seeds at the seedling, tillering, booting, and maturity stages. Tissue cultured rice seedlings were inoculated with Xathomonas sacchari JR3-14, a core endophytic bacterium of rice seeds, before transplanting. The results revealed that α-diversity indices were significantly enhanced in the root and stem endosphere at the seedling stage. β-diversity was altered at most plant developmental stages, except for the root and stem at the booting stage. Network complexity consequently increased in the root and stem across rice growth stages, other than the stem endosphere at the booting stage. Four abundant beneficial bacterial taxa, Bacillus, Azospira, Azospirillum, and Arthrobacter, were co-enriched during the early growth stage. Infer Community Assembly Mechanisms by Phylogenetic-bin-based null model analysis revealed a higher relative contribution of drift and other eco-evolutionary processes mainly in root compartments across all growth stages, but the opposite pattern was observed in stem compartments. IMPORTANCE Endophytic bacteria are regarded as promising environmentally friendly resources to promote plant growth and plant health. Some of microbes from the seed are able to be carried over to next generation, and contribute to the plant's ability to adapt to new environments. However, the effects of early inoculation with core microbes on the assembly of the plant microbiome are still unclear. In our study, we demonstrate that early inoculation of the rice seed core endophytic bacterium Xanthomonas sacchari could alter community diversity, enhance complexity degree of network structure at most the growth stages, and enrich beneficial bacteria at the seedling stage of rice. We further analyzed the evolutionary processes caused by the early inoculation. Our results highlight the new possibilities for research and application of sustainable agriculture by considering the contribution of seed endophytes in crop production and breeding.
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Affiliation(s)
- Xing Wang
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shan-Wen He
- Shanghai Academy of Landscape Architecture Science and Planning, Shanghai, China
| | - Qing He
- CAS Key Laboratory for Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China
| | - Zhi-Cheng Ju
- CAS Key Laboratory for Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China
| | - Yi-Nan Ma
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhe Wang
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jia-Cheng Han
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiao-Xia Zhang
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
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Rodríguez-Vázquez R, Mesa-Marín J. Plant responses to plant growth promoting bacteria: Insights from proteomics. JOURNAL OF PLANT PHYSIOLOGY 2023; 287:154031. [PMID: 37321049 DOI: 10.1016/j.jplph.2023.154031] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 06/05/2023] [Accepted: 06/07/2023] [Indexed: 06/17/2023]
Affiliation(s)
| | - Jennifer Mesa-Marín
- Department of Plant Biology and Ecology, Faculty of Biology, University of Seville, Seville, Spain.
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Zhao H, Sun N, Huang L, Qian R, Lin X, Sun C, Zhu Y. Azospirillum brasilense activates peroxidase-mediated cell wall modification to inhibit root cell elongation. iScience 2023; 26:107144. [PMID: 37534167 PMCID: PMC10391928 DOI: 10.1016/j.isci.2023.107144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 05/24/2023] [Accepted: 06/12/2023] [Indexed: 08/04/2023] Open
Abstract
The molecular mechanism of beneficial bacterium Azospirillum brasilense-mediated root developmental remain elusive. A. brasilense elicited extensively transcriptional changes but inhibited primary root elongation in Arabidopsis. By analyzing root cell type-specific developmental markers, we demonstrated that A. brasilense affected neither overall organization nor cell division of primary root meristem. The cessation of primary root resulted from reduction of cell elongation, which is probably because of bacterially activated peroxidase that will lead to cell wall cross-linking at consuming of H2O2. The activated peroxidase combined with downregulated cell wall loosening enzymes consequently led to cell wall thickness, whereas inhibiting peroxidase restored root growth under A. brasilense inoculation. We further showed that peroxidase activity was probably promoted by cadaverine secreted by A. brasilense. These results suggest that A. brasilense inhibits root elongation by activating peroxidase and inducing cell wall modification in Arabidopsis, in which cadaverine released by A. brasilense is a potential signal compound.
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Affiliation(s)
- Hongcheng Zhao
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
| | - Nan Sun
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
| | - Lin Huang
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ruyi Qian
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xianyong Lin
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
| | - Chengliang Sun
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yongguan Zhu
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, Hangzhou 310058, China
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China
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Valente J, Gerin F, Mini A, Richard R, Le Gouis J, Prigent-Combaret C, Moënne-Loccoz Y. Symbiotic Variations among Wheat Genotypes and Detection of Quantitative Trait Loci for Molecular Interaction with Auxin-Producing Azospirillum PGPR. Microorganisms 2023; 11:1615. [PMID: 37375117 DOI: 10.3390/microorganisms11061615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/13/2023] [Accepted: 06/17/2023] [Indexed: 06/29/2023] Open
Abstract
Crop varieties differ in their ability to interact with Plant Growth-Promoting Rhizobacteria (PGPR), but the genetic basis for these differences is unknown. This issue was addressed with the PGPR Azospirillum baldaniorum Sp245, using 187 wheat accessions. We screened the accessions based on the seedling colonization by the PGPR and the expression of the phenylpyruvate decarboxylase gene ppdC (for synthesis of the auxin indole-3-acetic acid), using gusA fusions. Then, the effects of the PGPR on the selected accessions stimulating Sp245 (or not) were compared in soil under stress. Finally, a genome-wide association approach was implemented to identify the quantitative trait loci (QTL) associated with PGPR interaction. Overall, the ancient genotypes were more effective than the modern genotypes for Azospirillum root colonization and ppdC expression. In non-sterile soil, A. baldaniorum Sp245 improved wheat performance for three of the four PGPR-stimulating genotypes and none of the four non-PGPR-stimulating genotypes. The genome-wide association did not identify any region for root colonization but revealed 22 regions spread on 11 wheat chromosomes for ppdC expression and/or ppdC induction rate. This is the first QTL study focusing on molecular interaction with PGPR bacteria. The molecular markers identified provide the possibility to improve the capacity of modern wheat genotypes to interact with Sp245, as well as, potentially, other Azospirillum strains.
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Affiliation(s)
- Jordan Valente
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie Microbienne, 43 Bd du 11 Novembre 1918, F-69622 Villeurbanne, France
| | - Florence Gerin
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie Microbienne, 43 Bd du 11 Novembre 1918, F-69622 Villeurbanne, France
| | - Agathe Mini
- GDEC, INRAE, UCA, F-63000 Clermont-Ferrand, France
| | | | | | - Claire Prigent-Combaret
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie Microbienne, 43 Bd du 11 Novembre 1918, F-69622 Villeurbanne, France
| | - Yvan Moënne-Loccoz
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie Microbienne, 43 Bd du 11 Novembre 1918, F-69622 Villeurbanne, France
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Gaspareto RN, Jalal A, Ito WCN, Oliveira CEDS, Garcia CMDP, Boleta EHM, Rosa PAL, Galindo FS, Buzetti S, Ghaley BB, Filho MCMT. Inoculation with Plant Growth-Promoting Bacteria and Nitrogen Doses Improves Wheat Productivity and Nitrogen Use Efficiency. Microorganisms 2023; 11:microorganisms11041046. [PMID: 37110469 PMCID: PMC10142644 DOI: 10.3390/microorganisms11041046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/08/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Wheat is one of the staple foods of the global population due to its adaptability to a wide range of environments. Nitrogen is one of the crucial limiting factors in wheat production and is considered a challenge to food security. Therefore, sustainable agricultural technologies such as seed inoculation with plant growth-promoting bacteria (PGPBs) can be adopted to promote biological nitrogen fixation (BNF) for higher crop productivity. In this context, the objective of the current study was to evaluate the effects of nitrogen fertilization and seed inoculations with Azospirillum brasilense, Bacillus subtilis and A. brasilense + B. subtilis on agronomic and yield attributes, grain yield, grain N accumulation, N use efficiency and applied N recovery in Brazilian Cerrado, which consists of gramineous woody savanna. The experiment was carried out in two cropping seasons in Rhodic Haplustox soil under a no-tillage system. The experiment was designed in a randomized complete block in a 4 × 5 factorial scheme, with four replications. The treatments consisted of four seed inoculations (control-without inoculation, inoculation with A. brasilense, B. subtilis and A. brasilense + B. subtilis) under five N doses (0, 40, 80, 120 and 160 kg ha-1, applied from urea) at the wheat tillering stage. Seed co-inoculation with A. brasilense + B. subtilis increased grain N accumulation, number of spikes m-1, grains spike-1 and grain yield of wheat in an irrigated no-tillage system of tropical savannah, regardless of the applied N doses. Nitrogen fertilization at a dose of 80 kg ha-1 significantly increased grain N accumulation and number of grains spikes-1 and nitrogen use efficiency. Recovery of applied N was increased with inoculation of B. subtilis and co-inoculation of A. brasilense + B. subtilis at increasing N doses. Therefore, N fertilization can be reduced by the inclusion of co-inoculation with A. brasilense + B. subtilis in the cultivation of winter wheat under a no-tillage system of Brazilian Cerrado.
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Affiliation(s)
- Rafaela Neris Gaspareto
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Arshad Jalal
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - William Cesar Nishimoto Ito
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Carlos Eduardo da Silva Oliveira
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Cássia Maria de Paula Garcia
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | | | - Poliana Aparecida Leonel Rosa
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Fernando Shintate Galindo
- Department of Crop Production, College of Agricultural and Technology Sciences, São Paulo State University (UNESP), Dracena 17900-000, SP, Brazil
| | - Salatiér Buzetti
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Bhim Bahadur Ghaley
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 2630 Taastrup, Denmark
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Pelloso MF, Vidigal Filho PS, Scapim CA, Tiene Ortiz AH, Numoto AY, Miranda Freitas IR. Agronomic performance and quality of baby corn in response to the inoculation of seeds with Azospirillum brasilense and nitrogen fertilization in the summer harvest. Heliyon 2023; 9:e14618. [PMID: 37035362 PMCID: PMC10073748 DOI: 10.1016/j.heliyon.2023.e14618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 03/10/2023] [Accepted: 03/13/2023] [Indexed: 03/19/2023] Open
Abstract
The association with Azospirillum brasilense promotes better growth and development in corn plants due to biological N fixation, the capacity to help in the synthesis of phytohormones and to improve the use of nutrients by crop plants. However, there aren't specific recommendations for the use of inoculation in baby corn crop. Thus, this study aimed to evaluate the effects of seed inoculation with A. brasilense, associated with nitrogen fertilization management, on the agronomic performance and chemical quality of baby corn grown in three summer growing seasons (2014/2015; 2015/2016 and 2016/2017). The evaluated treatments consisted of combination of five levels of seed inoculation (0.0, 50, 100, 150 and 200 mL 60,000 seeds-1) based on Azospirillum brasilense, two levels of nitrogen fertilization at sowing time (0.0 and 30.0 kg of N ha-1) and two levels of nitrogen in topdressing (0.0 and 110.0 kg of N ha-1), applied at the V4 stage of the popcorn hybrid IAC 125. The characteristics evaluated were: leaf area index (LAI), leaf nitrogen content (LNC), total husked spikelets yield (HSY) and commercial spikelets yield (CSY), and the chemical characteristics of the commercial spikelets: crude protein content (CPC), starch content (STC) and total sugar content (TSC). The inoculation, when combined with nitrogen fertilization, provided positive responses for LAI and provided an average increment of 6 kg ha-1 to CSY for every 10 mL 60,000 seeds-1 of inoculant added to the seeds. The LNC, CPC, STC and TSC weren't affected by seed inoculation. Nitrogen fertilization provided increments for all characteristics evaluated, except for TSC, which was negatively affected by nitrogen topdressing. The baby corn crop responded positively to seed inoculation with Azospirillum brasilense, combined with Nitrogen fertilization.
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Liu J, Zhang J, Shi Q, Liu X, Yang Z, Han P, Li J, Wei Z, Hu T, Liu F. The Interactive Effects of Deficit Irrigation and Bacillus pumilus Inoculation on Growth and Physiology of Tomato Plant. PLANTS (BASEL, SWITZERLAND) 2023; 12:670. [PMID: 36771756 PMCID: PMC9919795 DOI: 10.3390/plants12030670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
The effects of inoculating plant growth promoting rhizobacteria (PGPR) and soil water deficits on crop growth and physiology remain largely unknown. Here, the responses of leaf gas exchange, growth, and water use efficiency (WUE) of tomato plants to Bacillus pumilus (B.p.) inoculation under four irrigation strategies (I1-I4) were investigated in a greenhouse. Results showed that soil water deficits, especially at I4 (20%, v/v), significantly decreased leaf stomatal conductance (gs), transpiration rate (Tr), and photosynthetic rate (An), and the decrease of gs and Tr were more pronounced than An. Reduced irrigation regimes significantly lowered dry matter and plant water use both in the non-B.p. control and the B.p. plants, while reduced irrigation significantly increased plant WUE, and B.p. inoculation had little effect on this parameter. Synergistic effects of PGPR and deficit irrigation on leaf gas exchange, leaf abscisic acid content, and stomatal density were found in this study, and specifically, B.p. treated plants at I4 possessed the highest WUE at stomatal and leaf scales, suggesting that B.p. inoculation could optimize water use and partly alleviate the negative effects of soil water deficit. These findings provide useful information for effective irrigation management and the application of PGPR in agriculture in the future.
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Affiliation(s)
- Jie Liu
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
| | - Jiarui Zhang
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
| | - Qimiao Shi
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
| | - Xiangliang Liu
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
| | - Zhen Yang
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
| | - Pan Han
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
| | - Jingjing Li
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
| | - Zhenhua Wei
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
| | - Tiantian Hu
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Xianyang 712100, China
| | - Fulai Liu
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Allé 13, 2630 Taastrup, Denmark
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12
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Mapping Genetic Variation in Arabidopsis in Response to Plant Growth-Promoting Bacterium Azoarcus olearius DQS-4T. Microorganisms 2023; 11:microorganisms11020331. [PMID: 36838296 PMCID: PMC9961961 DOI: 10.3390/microorganisms11020331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/26/2023] [Accepted: 01/27/2023] [Indexed: 02/03/2023] Open
Abstract
Plant growth-promoting bacteria (PGPB) can enhance plant health by facilitating nutrient uptake, nitrogen fixation, protection from pathogens, stress tolerance and/or boosting plant productivity. The genetic determinants that drive the plant-bacteria association remain understudied. To identify genetic loci highly correlated with traits responsive to PGPB, we performed a genome-wide association study (GWAS) using an Arabidopsis thaliana population treated with Azoarcus olearius DQS-4T. Phenotypically, the 305 Arabidopsis accessions tested responded differently to bacterial treatment by improving, inhibiting, or not affecting root system or shoot traits. GWA mapping analysis identified several predicted loci associated with primary root length or root fresh weight. Two statistical analyses were performed to narrow down potential gene candidates followed by haplotype block analysis, resulting in the identification of 11 loci associated with the responsiveness of Arabidopsis root fresh weight to bacterial inoculation. Our results showed considerable variation in the ability of plants to respond to inoculation by A. olearius DQS-4T while revealing considerable complexity regarding statistically associated loci with the growth traits measured. This investigation is a promising starting point for sustainable breeding strategies for future cropping practices that may employ beneficial microbes and/or modifications of the root microbiome.
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Cao M, Narayanan M, Shi X, Chen X, Li Z, Ma Y. Optimistic contributions of plant growth-promoting bacteria for sustainable agriculture and climate stress alleviation. ENVIRONMENTAL RESEARCH 2023; 217:114924. [PMID: 36471556 DOI: 10.1016/j.envres.2022.114924] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 11/13/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Global climate change is the major cause of abiotic and biotic stresses that have adverse effects on agricultural productivity to an irreversible level, thus threatening to limit gains in production and imperil sustainable agriculture. These climate change-induced abiotic stresses, especially saline, drought, extreme temperature, and so on affect plant morphological, physiological, biochemical, and metabolic characteristics through various pathways and mechanisms, ultimately hindering plant growth, development, and productivity. However, overuse and other inappropriate uses of agrochemicals are not conducive to the protection of natural resources and the environment, thus hampering sustainable agricultural development. With the vigorous development of modern agriculture, the application of plant growth-promoting bacteria (PGPB) can better ensure sustainable agriculture, due to their ability to improve soil properties and confer stress tolerance in plants. This review deciphered the underlying mechanisms of PGPB involved in enhancing plant stress tolerance and performance under various abiotic and biotic stresses. Moreover, the recent advancements in PGPB inoculation techniques, the commercialization of PGPB-based technology and the current applications of PGPB in sustainable agriculture were extensively discussed. Finally, an outlook on the future directions of microbe-aided agriculture was pointed out. Providing insights into plant-PGPB interactions under biotic and abiotic stresses and offering evidence and strategies for PGPB better commercialization and implementation can inspire the development of innovative solutions exploiting PGPB under climatological conditions.
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Affiliation(s)
- Mengyuan Cao
- College of Resources and Environment, Southwest University, Chongqing, 400716, China
| | - Mathiyazhagan Narayanan
- Division of Research and Innovation, Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Science, Chennai, 602105, Tamil Nadu, India
| | - Xiaojun Shi
- College of Resources and Environment, Southwest University, Chongqing, 400716, China
| | - Xinping Chen
- College of Resources and Environment, Southwest University, Chongqing, 400716, China
| | - Zhenlun Li
- College of Resources and Environment, Southwest University, Chongqing, 400716, China
| | - Ying Ma
- College of Resources and Environment, Southwest University, Chongqing, 400716, China.
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Agronomic and Economic Evaluations of N Fertilization in Maize under Recent Market Dynamics. NITROGEN 2022. [DOI: 10.3390/nitrogen3030033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An online calculator is available to determine economic optimum nitrogen rate (EONR) for maize (Zea mays L.) production in the USA Corn Belt. For Minnesota, this calculator considers nitrogen (N) fertilizer cost, maize grain price and crop history, and produces a statewide N rate based on maximum economic return to N (MRTN). However, a clear precipitation and temperature gradient, and soil heterogeneity across the state, and recent changes in fertilizer cost and maize grain price require the comparison of EONR from this calculator with results from field study. The objectives of this research were to determine the agronomic and economic benefits of basal and split application of N fertilizer on maize grain yield and yield components and compare EONR from field study with N recommendation from the online calculator. The nitrogen fertilizer rate for the field study ranged from 0 to 224 kg N ha−1, either split or all applied at planting. The results showed that there were no interaction effects of N rate by time or N rate by year on maize grain yield. Maize grain yield had a quadratic response to N rate, and agronomic maximum grain yield peaked at 205 kg N ha−1. The EONR from the field study was 168 kg N ha−1 and it remained stable under a wide range of economic analysis scenarios with net benefit reaching up to 2474 USD ha−1. The N rate from the online calculator at MRTN was 151 kg N ha−1 and this rate may cause N deficiency in maize resulting in a yield penalty compared with the field study results. The field study was performed under specific soil and climatic conditions. Therefore, extensive research under various soil types, agronomic management practices and climatic conditions is warranted to evaluate the online calculator performance and its reliability as a precision tool for N fertilizer management in maize production.
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Naqqash T, Malik KA, Imran A, Hameed S, Shahid M, Hanif MK, Majeed A, Iqbal MJ, Qaisrani MM, van Elsas JD. Inoculation With Azospirillum spp. Acts as the Liming Source for Improving Growth and Nitrogen Use Efficiency of Potato. FRONTIERS IN PLANT SCIENCE 2022; 13:929114. [PMID: 35968126 PMCID: PMC9366913 DOI: 10.3389/fpls.2022.929114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 06/23/2022] [Indexed: 06/15/2023]
Abstract
Nitrogen (N) is one of the limiting factors for plant growth, and it is mainly supplied exogenously by fertilizer application. It is well documented that diazotrophic rhizobacteria improve plant growth by fixing atmospheric N in the soil. The present study investigates the nitrogen-fixing potential of two Azospirillum spp. strains using the 15N isotope-dilution method. The two diazotrophic strains (TN03 and TN09) native to the rhizosphere of potato belong to the genus Azospirillum (16S rRNA gene accession numbers LN833443 and LN833448, respectively). Both strains were able to grow on an N-free medium with N-fixation potential (138-143 nmol mg-1 protein h-1) and contained the nifH gene. Strain TN03 showed highest indole acetic acid (IAA) production (30.43 μg/mL), while TN09 showed highest phosphate solubilization activity (249.38 μg/mL) while both diazotrophs showed the production of organic acids. A 15N dilution experiment was conducted with different fertilizer inputs to evaluate the N-fixing potential of both diazotrophs in pots. The results showed that plant growth parameters and N contents increased significantly by the inoculations. Moreover, reduced 15N enrichment was found compared to uninoculated controls that received similar N fertilizer levels. This validates the occurrence of N-fixation through isotopic dilution. Strain TN09 showed higher N-fixing potential than TN03 and the uninoculated controls. Inoculation with either strain also showed a remarkable increase in plant growth under field conditions. Thus, there were remarkable increases in N use efficiency, N uptake and N utilization levels. Confocal laser scanning and transmission electron microscopy showed that TN03 is an ectophyte, i.e., present outside root cells or within the grooves of root hairs, while TN09 is an endophyte, i.e., present within root cells, forming a strong association withroot it. This study confirms that diazotrophic Azospirillum spp. added to potato systems can improve plant growth and N use efficiency, opening avenues for improvement of potato crop growth with reduced input of N fertilizer.
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Affiliation(s)
- Tahir Naqqash
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Pakistan
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | | | - Asma Imran
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Sohail Hameed
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
- Department of Biosciences, University of Wah Research Lab Complex, University of Wah, Wah, Pakistan
| | - Muhammad Shahid
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Muhammad Kashif Hanif
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
- Department of Biological Sciences, University of Lahore, Sargodha Campus, Punjab, Pakistan
| | - Afshan Majeed
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
- Department of Soil and Environmental Sciences, The University of Poonch Rawalakot, Rawalakot, Pakistan
| | - Muhammad Javed Iqbal
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Muther Mansoor Qaisrani
- Department of Bioinformatics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Jan Dirk van Elsas
- Department of Microbial Ecology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, Netherlands
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Massucato LR, Almeida SRDA, Silva MB, Mosela M, Zeffa DM, Nogueira AF, de Lima Filho RB, Mian S, Higashi AY, Teixeira GM, Shimizu GD, Giacomin RM, Fendrich RC, Faria MV, Scapim CA, Gonçalves LSA. Efficiency of Combining Strains Ag87 ( Bacillus megaterium) and Ag94 ( Lysinibacillus sp.) as Phosphate Solubilizers and Growth Promoters in Maize. Microorganisms 2022; 10:1401. [PMID: 35889120 PMCID: PMC9315647 DOI: 10.3390/microorganisms10071401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/22/2022] [Accepted: 06/25/2022] [Indexed: 11/17/2022] Open
Abstract
Increasing phosphorus (P) use efficiency in agricultural systems is urgent and essential to significantly reduce the global demand for this nutrient. Applying phosphate-solubilizing and plant growth-promoting bacteria in the rhizosphere represents a strategy worthy of attention. In this context, the present work aimed to select and validate bacterial strains capable of solubilizing phosphorous and promoting maize growth, aiming to develop a microbial inoculant to be used in Brazilian agriculture. Bacterial strains from the maize rhizosphere were evaluated based on their ability to solubilize phosphate and produce indole acetic acid. Based on these characteristics, 24 strains were selected to be further evaluated under laboratory, greenhouse, and field conditions. Among the selected strains, four (I04, I12, I13, and I17) showed a high potential to increase maize root growth and shoot P content. Strains I13 (Ag87) and I17 (Ag94) were identified by genomic sequencing as Bacillus megaterium and Lysinibacillus sp., respectively. These strains presented superior yield increments relative to the control treatment with 30% P. In addition, combining Ag87 and Ag94 resulted in even higher yield gains, indicating a synergistic effect that could be harnessed in a commercial inoculant for Brazilian agriculture.
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Affiliation(s)
- Luana Rainieri Massucato
- Agronomy Department, Universidade Estadual de Londrina (UEL), Londrina 86051-990, PR, Brazil; (L.R.M.); (S.R.d.A.A.); (A.F.N.); (S.M.); (A.Y.H.); (G.D.S.)
| | - Suelen Regina de Araújo Almeida
- Agronomy Department, Universidade Estadual de Londrina (UEL), Londrina 86051-990, PR, Brazil; (L.R.M.); (S.R.d.A.A.); (A.F.N.); (S.M.); (A.Y.H.); (G.D.S.)
| | | | - Mirela Mosela
- Microbiology Department, Universidade Estadual de Londrina (UEL), Londrina 86051-990, PR, Brazil; (M.M.); (G.M.T.)
| | - Douglas Mariani Zeffa
- Agronomy Department, Universidade Estadual de Maringá (UEM), Maringá 87020-900, PR, Brazil; (D.M.Z.); (R.B.d.L.F.); (C.A.S.)
| | - Alison Fernando Nogueira
- Agronomy Department, Universidade Estadual de Londrina (UEL), Londrina 86051-990, PR, Brazil; (L.R.M.); (S.R.d.A.A.); (A.F.N.); (S.M.); (A.Y.H.); (G.D.S.)
| | - Renato Barros de Lima Filho
- Agronomy Department, Universidade Estadual de Maringá (UEM), Maringá 87020-900, PR, Brazil; (D.M.Z.); (R.B.d.L.F.); (C.A.S.)
| | - Silas Mian
- Agronomy Department, Universidade Estadual de Londrina (UEL), Londrina 86051-990, PR, Brazil; (L.R.M.); (S.R.d.A.A.); (A.F.N.); (S.M.); (A.Y.H.); (G.D.S.)
| | - Allan Yukio Higashi
- Agronomy Department, Universidade Estadual de Londrina (UEL), Londrina 86051-990, PR, Brazil; (L.R.M.); (S.R.d.A.A.); (A.F.N.); (S.M.); (A.Y.H.); (G.D.S.)
| | - Gustavo Manoel Teixeira
- Microbiology Department, Universidade Estadual de Londrina (UEL), Londrina 86051-990, PR, Brazil; (M.M.); (G.M.T.)
| | - Gabriel Danilo Shimizu
- Agronomy Department, Universidade Estadual de Londrina (UEL), Londrina 86051-990, PR, Brazil; (L.R.M.); (S.R.d.A.A.); (A.F.N.); (S.M.); (A.Y.H.); (G.D.S.)
| | - Renata Mussoi Giacomin
- Biology Department, Universidade Estadual do Centro Oeste (Unicentro), Guarapuava 85015-430, PR, Brazil;
| | | | - Marcos Ventura Faria
- Agronomy Department, Universidade Estadual do Centro Oeste (Unicentro), Guarapuava 85015-430, PR, Brazil;
| | - Carlos Alberto Scapim
- Agronomy Department, Universidade Estadual de Maringá (UEM), Maringá 87020-900, PR, Brazil; (D.M.Z.); (R.B.d.L.F.); (C.A.S.)
| | - Leandro Simões Azeredo Gonçalves
- Agronomy Department, Universidade Estadual de Londrina (UEL), Londrina 86051-990, PR, Brazil; (L.R.M.); (S.R.d.A.A.); (A.F.N.); (S.M.); (A.Y.H.); (G.D.S.)
- Agronomy Department, Universidade Estadual de Maringá (UEM), Maringá 87020-900, PR, Brazil; (D.M.Z.); (R.B.d.L.F.); (C.A.S.)
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Azospirillum brasilense Bacteria Promotes Mn2+ Uptake in Maize with Benefits to Leaf Photosynthesis. Microorganisms 2022; 10:microorganisms10071290. [PMID: 35889009 PMCID: PMC9319945 DOI: 10.3390/microorganisms10071290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 02/01/2023] Open
Abstract
Azospirillum brasilense is a prolific grass-root colonizing bacteria well-known for its ability to promote plant growth in several cereal crops. Here we show that one of the mechanisms of action in boosting plant performance is through increased assimilation of the micronutrient manganese by the host. Using radioactive 52Mn2+ (t½ 5.59 d), we examined the uptake kinetics of this micronutrient in young maize plants, comparing the performance of three functional mutants of A. brasilense, including HM053, a high auxin-producing and high N2-fixing strain; ipdC, a strain with a reduced auxin biosynthesis capacity; and FP10, a strain deficient in N2-fixation that still produces auxin. HM053 had the greatest effect on host 52Mn2+ uptake, with a significant increase seen in shoot radioactivity relative to non-inoculated controls. LA-ICP-MS analysis of root sections revealed higher manganese distributions in the endodermis of HM053-inoculated plants and overall higher manganese concentrations in leaves. Finally, increased leaf manganese concentration stimulated photosynthesis as determined by measuring leaf fixation of radioactive 11CO2 with commensurate increases in chlorophyll concentration.
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Zaheer MS, Ali HH, Erinle KO, Wani SH, Okon OG, Nadeem MA, Nawaz M, Bodlah MA, Waqas MM, Iqbal J, Raza A. Inoculation of Azospirillum brasilense and exogenous application of trans-zeatin riboside alleviates arsenic induced physiological damages in wheat (Triticum aestivum). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:33909-33919. [PMID: 35031990 DOI: 10.1007/s11356-021-18106-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Due to increased industrialization, arsenic (As) in the soil has become a serious issue for wheat production since past few decades. We investigated the role of Azospirillum brasilense and trans-zeatin riboside (tZR) in the mitigation of arsenic toxicity in wheat for 2 years (2018-2019 and 2019-2020) in pot experiments. Wheat plants grown in soil artificially spiked with arsenic (50, 70, and 100 μM) was left alone or amended with A. brasilense, tZR, or their combination as mitigation strategies. A treatment without arsenic or amendments was maintained as control. Arsenic-induced physiological damages were noticed in the wheat plants. Detrimental effects on the plant physiological functions, such as disruption of cell membrane stability, reduced water uptake, and stomatal functions, were noticed with increase in As toxicity. Application of biological amendments reversed the effects of As toxicity by increasing wheat plant growth rate, leaf area, and photosynthesis and also yield. Therefore, application of tZR and wheat seed inoculation with A. brasilense could be a sustainable and environmentally friendly strategy to mitigate arsenic-induced crop physiological damages.
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Affiliation(s)
- Muhammad Saqlain Zaheer
- Department of Agricultural Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan.
| | - Hafiz Haider Ali
- Sustainable Development Study Center (SDSC), Government College University, Katchery Road, Lahore, Pakistan.
| | - Kehinde O Erinle
- School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Shabir Hussain Wani
- Mountain Research Centre for Field Crops, Sher-E-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir, Khudwani, Anantnag, 192101, India
| | - Okon Godwin Okon
- Department of Botany, Akwa Ibom State University, Ikot Akpaden, Nigeria
| | - Muhammad Azhar Nadeem
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, 58140, Turkey
| | - Muhammad Nawaz
- Department of Agricultural Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Muhammad Adnan Bodlah
- Department of Agricultural Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Muhammad Mohsin Waqas
- Department of Agricultural Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Javaid Iqbal
- Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh, 11451, Saudi Arabia
| | - Ali Raza
- Department of Agronomy, College of Agriculture, University of Sargodha, Sargodha, Pakistan
- Department of Biological Sciences, University of Sialkot, Sialkot, Pakistan
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19
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Enhancing agronomic efficiency and maize grain yield with Azospirillum brasilense inoculation under Brazilian savannah conditions. EUROPEAN JOURNAL OF AGRONOMY 2022. [DOI: 10.1016/j.eja.2022.126471] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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20
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Inoculation with Plant Growth-Promoting Bacteria to Reduce Phosphate Fertilization Requirement and Enhance Technological Quality and Yield of Sugarcane. Microorganisms 2022; 10:microorganisms10010192. [PMID: 35056643 PMCID: PMC8781176 DOI: 10.3390/microorganisms10010192] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/10/2022] [Accepted: 01/11/2022] [Indexed: 02/05/2023] Open
Abstract
Phosphorus (P) is a critical nutrient for high sugarcane yields throughout its cultivation cycles, however, a higher amount of P becomes rapidly unavailable to plants due to its adsorption to soil colloids. Some plant growth-promoting bacteria (PGPBs) may be able to enhance P availability to plants and produce phytohormones that contribute to crop development, quality, and yield. Thus, this study aimed to evaluate leaf concentrations of nitrogen (N) and P, yield, and technological quality of sugarcane as a function of different levels of phosphate fertilization associated with inoculation of PGPBs. The experiment was carried out at Ilha Solteira, São Paulo—Brazil. The experimental design was randomized blocks with three replications, consisting of five phosphorus rates (0, 25, 50, 75, and 100% of the recommended P2O5 rate) and eight inoculations, involving three species of PGPBs (Azospirillum brasilense, Bacillus subtilis, and Pseudomonas fluorescens) which were applied combined or in a single application into the planting furrow of RB92579 sugarcane variety. The inoculation of B. subtilis and P. fluorescens provided a higher concentration of leaf P in sugarcane. The P2O5 rates combined with inoculation of bacteria alter technological variables and stalk yield of sugarcane. The excess and lack of phosphate fertilizer is harmful to sugarcane cultivation, regardless of the use of growth-promoting bacteria. We recommend the inoculation with A. brasilense + B. subtilis associated with 45 kg ha−1 of P2O5 aiming at greater stalk yield. This treatment also increases sugar yield, resulting in a savings of 75% of the recommended P2O5 rate, thus being a more efficient and sustainable alternative for reducing sugarcane crop production costs.
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21
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Mahapatra DM, Satapathy KC, Panda B. Biofertilizers and nanofertilizers for sustainable agriculture: Phycoprospects and challenges. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 803:149990. [PMID: 34492488 DOI: 10.1016/j.scitotenv.2021.149990] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 08/17/2021] [Accepted: 08/24/2021] [Indexed: 05/21/2023]
Abstract
Increased food demands and ceasing nutrient deposits have resulted in a great shortfall between the food supply and demand and would be worse in the years to come. Higher inputs of synthetic fertilizers on lands have resulted in environmental pollution, persistent changes in the soil ecology, and physicochemical conditions. This has greatly decreased the natural soil fertility thereby hindering agricultural productivity, human health, and hygiene. Bio-based resilient nutrient sources as wastewater-derived algae are promising as a complete nutrient for agriculture and have the potential to be used in soilless cultivations. Innovations in nano-fortification and nano-sizing of minerals and algae have the potential to facilitate nutrients bioavailability and efficacy for a multifold increase in productivity. In this context, various options on minerals nanofertilizer application in agricultural food production besides efficient biofertilizer have been investigated. Algal biofertilizer with the nanoscale application has huge prospects for further agriculture productivities and fosters suitable development.
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Affiliation(s)
- Durga Madhab Mahapatra
- Center of Environment, Climate Change and Public Health, Utkal University, Vani Vihar, Bhubaneswar 751004, Odisha, India; Biological and Ecological Engineering Department, Oregon State University, Corvallis, OR, USA.
| | - Kanhu Charan Satapathy
- Center of Environment, Climate Change and Public Health, Utkal University, Vani Vihar, Bhubaneswar 751004, Odisha, India; Post Graduate Department of Anthropology, Utkal University, Bhubaneswar 751004, Odisha, India.
| | - Bhabatarini Panda
- Center of Environment, Climate Change and Public Health, Utkal University, Vani Vihar, Bhubaneswar 751004, Odisha, India; Post Graduate Department of Botany, Utkal University, Bhubaneswar 751004, Odisha, India.
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22
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Maitra S, Brestic M, Bhadra P, Shankar T, Praharaj S, Palai JB, Shah MMR, Barek V, Ondrisik P, Skalický M, Hossain A. Bioinoculants-Natural Biological Resources for Sustainable Plant Production. Microorganisms 2021; 10:51. [PMID: 35056500 PMCID: PMC8780112 DOI: 10.3390/microorganisms10010051] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/21/2021] [Accepted: 12/23/2021] [Indexed: 11/22/2022] Open
Abstract
Agricultural sustainability is of foremost importance for maintaining high food production. Irresponsible resource use not only negatively affects agroecology, but also reduces the economic profitability of the production system. Among different resources, soil is one of the most vital resources of agriculture. Soil fertility is the key to achieve high crop productivity. Maintaining soil fertility and soil health requires conscious management effort to avoid excessive nutrient loss, sustain organic carbon content, and minimize soil contamination. Though the use of chemical fertilizers have successfully improved crop production, its integration with organic manures and other bioinoculants helps in improving nutrient use efficiency, improves soil health and to some extent ameliorates some of the constraints associated with excessive fertilizer application. In addition to nutrient supplementation, bioinoculants have other beneficial effects such as plant growth-promoting activity, nutrient mobilization and solubilization, soil decontamination and/or detoxification, etc. During the present time, high energy based chemical inputs also caused havoc to agriculture because of the ill effects of global warming and climate change. Under the consequences of climate change, the use of bioinputs may be considered as a suitable mitigation option. Bioinoculants, as a concept, is not something new to agricultural science, however; it is one of the areas where consistent innovations have been made. Understanding the role of bioinoculants, the scope of their use, and analysing their performance in various environments are key to the successful adaptation of this technology in agriculture.
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Affiliation(s)
- Sagar Maitra
- Department of Agronomy, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India; (S.M.); (T.S.); (S.P.); (J.B.P.)
| | - Marian Brestic
- Department of Plant Physiology, Slovak University of Agriculture, Tr. A. Hlinku 2, 949 01 Nitra, Slovakia;
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food, and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague, Czech Republic;
| | - Preetha Bhadra
- Department of Biotechnology, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India;
| | - Tanmoy Shankar
- Department of Agronomy, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India; (S.M.); (T.S.); (S.P.); (J.B.P.)
| | - Subhashisa Praharaj
- Department of Agronomy, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India; (S.M.); (T.S.); (S.P.); (J.B.P.)
| | - Jnana Bharati Palai
- Department of Agronomy, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India; (S.M.); (T.S.); (S.P.); (J.B.P.)
| | | | - Viliam Barek
- Department of Water Resources and Environmental Engineering, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture, Tr. A. Hlinku 2, 949 01 Nitra, Slovakia;
| | - Peter Ondrisik
- Department of Plant Physiology, Slovak University of Agriculture, Tr. A. Hlinku 2, 949 01 Nitra, Slovakia;
| | - Milan Skalický
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food, and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague, Czech Republic;
| | - Akbar Hossain
- Bangladesh Wheat and Maize Research Institute, Dinajpur 5200, Bangladesh;
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23
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Galindo FS, Brito VB, Teixeira Filho MCM. Assessing nutritional status and development of Pereskia aculeata Mill. affected by inoculation of Azospirillum brasilense combined with nitrogen rates. JOURNAL OF PLANT NUTRITION 2021. [DOI: 10.1080/01904167.2021.2014880] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Fernando Shintate Galindo
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, São Paulo, Brazil
| | - Vanessa Biazotto Brito
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, São Paulo, Brazil
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Gómez-Godínez LJ, Martínez-Romero E, Banuelos J, Arteaga-Garibay RI. Tools and challenges to exploit microbial communities in agriculture. CURRENT RESEARCH IN MICROBIAL SCIENCES 2021; 2:100062. [PMID: 34841352 PMCID: PMC8610360 DOI: 10.1016/j.crmicr.2021.100062] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 08/12/2021] [Accepted: 08/18/2021] [Indexed: 12/13/2022] Open
Abstract
Plants contain diverse microbial communities. The associated microorganisms confer advantages to the host plant, which include growth promotion, nutrient absorption, stress tolerance, and pathogen and disease resistance. In this review, we explore how agriculture is implementing the use of microbial inoculants (single species or consortia) to improve crop yields, and discuss current strategies to study plant-associated microorganisms and how their diversity varies under unconventional agriculture. It is predicted that microbial inoculation will continue to be used in agriculture.
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Affiliation(s)
- Lorena Jacqueline Gómez-Godínez
- Laboratorio de Recursos Genéticos Microbianos, Centro Nacional de Recursos Genéticos. Instituto Nacional de Investigación Forestales, Agrícolas y Pecuarios. Boulevard de la Biodiversidad 400, Rancho las Cruces, C.P. 47600. Tepatitlán de Morelos, Jalisco, México
| | - Esperanza Martínez-Romero
- Centro de Ciencias genómicas, Universidad Nacional Autónoma de México Campus Morelos, Cuernavaca, Morelos México
| | - Jacob Banuelos
- Laboratorio de Organismos Benéficos, Facultad de Ciencias Agrícolas, Universidad Veracruzana. Circuito Aguirre Beltrán SN, Col. Universitaria, CP 91000, Xalapa, Veracruz, México
| | - Ramón I. Arteaga-Garibay
- Laboratorio de Recursos Genéticos Microbianos, Centro Nacional de Recursos Genéticos. Instituto Nacional de Investigación Forestales, Agrícolas y Pecuarios. Boulevard de la Biodiversidad 400, Rancho las Cruces, C.P. 47600. Tepatitlán de Morelos, Jalisco, México
- Corresponding authors.
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25
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Galindo FS, Pagliari PH, Buzetti S, Rodrigues WL, Fernandes GC, Biagini ALC, Tavanti RFR, Teixeira Filho MCM. Nutrient availability affected by silicate and
Azospirillum brasilense
application in corn–wheat rotation. AGRONOMY JOURNAL 2021. [DOI: 10.1002/agj2.20802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
| | - Paulo Humberto Pagliari
- Dep. of Soil, Water, and Climate Univ. of Minnesota, Southwest Research and Outreach Center Lamberton MN USA
| | - Salatiér Buzetti
- Dep. of Plant Health, Rural Engineering, and Soils São Paulo State Univ. Ilha Solteira São Paulo Brazil
| | - Willian Lima Rodrigues
- Dep. of Plant Health, Rural Engineering, and Soils São Paulo State Univ. Ilha Solteira São Paulo Brazil
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26
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Galindo FS, Pagliari PH, Buzetti S, Rodrigues WL, Fernandes GC, Biagini ALC, Marega EMR, Tavanti RFR, Jalal A, Teixeira Filho MCM. Corn shoot and grain nutrient uptake affected by silicon application combined with Azospirillum brasilense inoculation and nitrogen rates. JOURNAL OF PLANT NUTRITION 2021. [DOI: 10.1080/01904167.2021.1943436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Fernando Shintate Galindo
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, Brazil
| | - Paulo Humberto Pagliari
- Department of Soil, Water, and Climate, University of Minnesota, Southwest Research and Outreach Center, Lamberton, MN, USA
| | - Salatiér Buzetti
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, Brazil
| | - Willian Lima Rodrigues
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, Brazil
| | - Guilherme Carlos Fernandes
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, Brazil
| | | | - Evelyn Maria Rocha Marega
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, Brazil
| | | | - Arshad Jalal
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, Brazil
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27
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Abstract
The integral role of microbial communities in plant growth and health is now widely recognized, and, increasingly, the constituents of the microbiome are being defined. While phylogenetic surveys have revealed the taxa present in a microbiome and show that this composition can depend on, and respond to, environmental perturbations, the challenge shifts to determining why particular microbes are selected and how they collectively function in concert with their host. In this study, we targeted the isolation of representative bacterial strains from environmental samples of Populus roots using a direct plating approach and compared them to amplicon-based sequencing analysis of root samples. The resulting culture collection contains 3,211 unique isolates representing 10 classes, 18 orders, 45 families, and 120 genera from 6 phyla, based on 16S rRNA gene sequence analysis. The collection accounts for ∼50% of the natural community of plant-associated bacteria as determined by phylogenetic analysis. Additionally, a representative set of 553 had their genomes sequenced to facilitate functional analyses. The top sequence variants in the amplicon data, identified as Pseudomonas, had multiple representatives within the culture collection. We then explore a simplified microbiome, comprised of 10 strains representing abundant taxa from environmental samples, and tested for their ability to reproducibly colonize Populus root tissue. The 10-member simplified community was able to reproducibly colonize on Populus roots after 21 days, with some taxa found in surface-sterilized aboveground tissue. This study presents a comprehensive collection of bacteria isolated from Populus for use in exploring microbial function and community inoculation experiments to understand basic concepts of plant and environmental selection. IMPORTANCE Microbial communities play an integral role in the health and survival of their plant hosts. Many studies have identified key members in these communities and led to the use of synthetic communities for elucidating their function; however, these studies are limited by the available cultured bacterial representatives. Here, we present a bacterial culture collection comprising 3,211 isolates that is representative of the root community of Populus. We then demonstrate the ability to examine underlying microbe-microbe interactions using a synthetic community approach. This culture collection will allow for the greater exploration of the microbial community function through targeted experimentation and manipulation.
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28
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Vannini C, Domingo G, Fiorilli V, Seco DG, Novero M, Marsoni M, Wisniewski-Dye F, Bracale M, Moulin L, Bonfante P. Proteomic analysis reveals how pairing of a Mycorrhizal fungus with plant growth-promoting bacteria modulates growth and defense in wheat. PLANT, CELL & ENVIRONMENT 2021; 44:1946-1960. [PMID: 33675052 DOI: 10.1111/pce.14039] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 02/17/2021] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
Plants rely on their microbiota for improving the nutritional status and environmental stress tolerance. Previous studies mainly focused on bipartite interactions (a plant challenged by a single microbe), while plant responses to multiple microbes have received limited attention. Here, we investigated local and systemic changes induced in wheat by two plant growth-promoting bacteria (PGPB), Azospirillum brasilense and Paraburkholderia graminis, either alone or together with an arbuscular mycorrhizal fungus (AMF). We conducted phenotypic, proteomic, and biochemical analyses to investigate bipartite (wheat-PGPB) and tripartite (wheat-PGPB-AMF) interactions, also upon a leaf pathogen infection. Results revealed that only AMF and A. brasilense promoted plant growth by activating photosynthesis and N assimilation which led to increased glucose and amino acid content. The bioprotective effect of the PGPB-AMF interactions on infected wheat plants depended on the PGPB-AMF combinations, which caused specific phenotypic and proteomic responses (elicitation of defense related proteins, immune response and jasmonic acid biosynthesis). In the whole, wheat responses strongly depended on the inoculum composition (single vs. multiple microbes) and the investigated organs (roots vs. leaf). Our findings showed that AMF is the best-performing microbe, suggesting its presence as the crucial one for synthetic microbial community development.
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Affiliation(s)
- Candida Vannini
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Varese, Italy
| | - Guido Domingo
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Varese, Italy
| | - Valentina Fiorilli
- Department of Life Sciences and Systems Biology, Università degli Studi di Torino, Torino, Italy
| | | | - Mara Novero
- Department of Life Sciences and Systems Biology, Università degli Studi di Torino, Torino, Italy
| | - Milena Marsoni
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Varese, Italy
| | - Florence Wisniewski-Dye
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgroSup, UMR Ecologie Microbienne, Villeurbanne, France
| | - Marcella Bracale
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Varese, Italy
| | - Lionel Moulin
- IRD, CIRAD, University of Montpellier, IPME, Montpellier, France
| | - Paola Bonfante
- Department of Life Sciences and Systems Biology, Università degli Studi di Torino, Torino, Italy
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Chemical and Biological Enhancement Effects of Biochar on Wheat Growth and Yield under Arid Field Conditions. SUSTAINABILITY 2021. [DOI: 10.3390/su13115890] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nitrogen (N) losses are prevalent under South East Asia’s due to high N fertilizer inputs, but low N fertilizer use efficiency. This leaves a large quantity of reactive N at risk of loss to the environment. Biochar has been found to reduce N losses across a variety of soil types, however, there is limited data available for semi-arid climates, particularly at a field-scale. Herein we present an exploration of the biological and chemical enhancement effects observed of a cotton stalk-based biochar on wheat growth and yield under arid field conditions. The biochar was treated with urea-N and biofertilizer (bio-power) in different treatment setups. The six experimental treatments included; (i) a full N dose “recommended for wheat crops in the region” (104 kg N ha−1) as a positive control; (ii) a half N dose (52 kg N ha−1); (iii) a half N dose + biofertilizer (4.94 kg ha−1) as a soil mixture; (iv) a half N dose + biofertilizer as a seed inoculation; (v) a full N dose as broadcast + biochar (5 t ha−1) inoculated with biofertilizer; and (vi) a full N dose loaded on biochar + biofertilizer applied as a soil mixture. The half dose N application or biofertilizer addition as soil mix/seed inoculated/biochar inoculation with biofertilizer caused reduced wheat growth and yield compared to the control (conventional N fertilization). However, co-application of chemically enhanced biochar (loaded with a full N dose) and biofertilizer as soil mixture significantly increased the crop growth rate (CGR) and leaf area index (LAI). A significantly higher crop growth and canopy development led to a higher light interception and radiation use efficiency (RUE) for total dry matter (TDM) and grain yield (11% greater than control) production compared to the control. A greater grain yield, observed for the full N dose loaded on biochar + biofertilizer applied as a soil mixture, is attributed to prolonged N availability as indicated by greater plant and soil N content at harvest and different crop growth stages, respectively. The present study has improved our understanding of how the application of nitrogen loaded biochar and biofertilizer as soil mixtures can synergize to positively affect wheat growth and soil-nitrogen retention under arid environmental conditions.
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Galindo FS, Bellotte JLM, Santini JMK, Buzetti S, Rosa PAL, Jalal A, Teixeira Filho MCM. Zinc use efficiency of maize-wheat cropping after inoculation with Azospirillum brasilense. NUTRIENT CYCLING IN AGROECOSYSTEMS 2021. [DOI: 10.1007/s10705-021-10149-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Volkogon VV, Dimova SB, Volkogon KI, Sidorenko VP, Volkogon MV. Biological Nitrogen Fixation and Denitrification in Rhizosphere of Potato Plants in Response to the Fertilization and Inoculation. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.606379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The study aim was to evaluate the potential nitrogen fixation and denitrification in the rhizosphere soil of potato plants, crop yield and output quality in response to the different fertilization systems and the inoculation with Azospirillum brasilense 410. Field stationary experiment was conducted between 2016 and 2019 with potato in a crop rotation system on leached chernozem soil. Farmyard manure, 40 t/ha, applied prior to potatoes planting promotes nitrogen fixation (0.8–2.0 times compared to control). However, it has also affected denitrification (in 1.4–2.2 times higher compared to control). The lowest rate of mineral fertilizers used in the experiment, N40P40K40, was shown as most environmentally feasible. Under its use the increase of soil nitrogenase activity and low denitrification levels were observed. Same trends were also noted for the medium fertilizer rate, N80P80K80. The highest doses of mineral fertilizers, N120P120K120, substantially affected the denitrification process and reduced the nitrogen fixation activity (in 1.9–2.2 times). The combination of manure with the medium fertilizers rate has also resulted in high denitrification levels, while the soil nitrogen fixation activity has restored only at flowering stage. Crop inoculation with A. brasilense combined with the manure application, has not affected studied processes. However, crop inoculation after the green manure intercropping has shown the growth of nitrogenase activity. Used on the mineral fertilizers background inoculation has activated nitrogen fixation and has ensured the decrease of denitrification levels, subject to the fertilization background. High fertilizer rates have hampered the inoculation efficiency. Inoculation has promoted crop yields on unfertilized and mineral backgrounds or following green manure. Crop inoculation following organic and the organo-mineral backgrounds had no significant effect, probably due to the competition for A. brasilense from microorganisms that have created a competitive environment for A. brasilense. Despite its environmental expediency, inoculation combined with the low fertilizer doses underperforms the action of inoculation combined with the medium fertilizer rates showing the latter as the compromise between the environmental requirements and crop productivity. The use of inoculation has promoted the accumulation of starch and ascorbic acid and has contributed to the reduction of nitrate contents in the tubers of inoculated plants.
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Housh AB, Benoit M, Wilder SL, Scott S, Powell G, Schueller MJ, Ferrieri RA. Plant-Growth-Promoting Bacteria Can Impact Zinc Uptake in Zea mays: An Examination of the Mechanisms of Action Using Functional Mutants of Azospirillum brasilense. Microorganisms 2021; 9:microorganisms9051002. [PMID: 34066521 PMCID: PMC8148439 DOI: 10.3390/microorganisms9051002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 04/27/2021] [Accepted: 05/04/2021] [Indexed: 11/16/2022] Open
Abstract
Among the PGPB, the genus Azospirillum-with an emphasis on A. brasilense-is likely the most studied microorganism for mitigation of plant stress. Here, we report the investigation of functional mutants HM053, ipdC and FP10 of A. brasilense to understand how the biological functions of these microorganisms can affect host Zn uptake. HM053 is a Nif+ constitutively expressed strain that hyper-fixes N2 and produces high levels of the plant's relevant hormone auxin. FP10 is a Nif- strain deficient in N2-fixation. ipdC is a strain that is deficient in auxin production but fixes N2. Zn uptake was measured in laboratory-based studies of 3-week-old plants using radioactive 65Zn2+ (t½ 244 days). Principal Component Analysis was applied to draw out correlations between microbial functions and host 65Zn2+ accumulation. Additionally, statistical correlations were made to our prior data on plant uptake of radioactive 59Fe3+ and 59Fe2+. These correlations showed that low microbial auxin-producing capacity resulted in the greatest accumulation of 65Zn. Just the opposite effect was noted for 59Fe where high microbial auxin-producing capacity resulted in the greatest accumulation of that tracer.
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Affiliation(s)
- Alexandra Bauer Housh
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA; (A.B.H.); (S.L.W.); (S.S.); (G.P.); (M.J.S.)
- Chemistry Department, University of Missouri, Columbia, MO 652101, USA
- Interdisciplinary Plant Group, University of Missouri, Columbia, MO 65211, USA
| | - Mary Benoit
- Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA;
| | - Stacy L. Wilder
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA; (A.B.H.); (S.L.W.); (S.S.); (G.P.); (M.J.S.)
| | - Stephanie Scott
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA; (A.B.H.); (S.L.W.); (S.S.); (G.P.); (M.J.S.)
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, USA
| | - Garren Powell
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA; (A.B.H.); (S.L.W.); (S.S.); (G.P.); (M.J.S.)
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, USA
| | - Michael J. Schueller
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA; (A.B.H.); (S.L.W.); (S.S.); (G.P.); (M.J.S.)
- Chemistry Department, University of Missouri, Columbia, MO 652101, USA
| | - Richard A. Ferrieri
- Missouri Research Reactor Center, University of Missouri, Columbia, MO 65211, USA; (A.B.H.); (S.L.W.); (S.S.); (G.P.); (M.J.S.)
- Chemistry Department, University of Missouri, Columbia, MO 652101, USA
- Interdisciplinary Plant Group, University of Missouri, Columbia, MO 65211, USA
- Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA;
- Correspondence: ; Tel.: +1-573-882-5211
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Chai YN, Ge Y, Stoerger V, Schachtman DP. High-resolution phenotyping of sorghum genotypic and phenotypic responses to low nitrogen and synthetic microbial communities. PLANT, CELL & ENVIRONMENT 2021; 44:1611-1626. [PMID: 33495990 DOI: 10.1111/pce.14004] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/17/2020] [Indexed: 05/12/2023]
Abstract
Much effort has been placed on developing microbial inoculants to replace or supplement fertilizers to improve crop productivity and environmental sustainability. However, many studies ignore the dynamics of plant-microbe interactions and the genotypic specificity of the host plant on the outcome of microbial inoculation. Thus, it is important to study temporal plant responses to inoculation in multiple genotypes within a single species. With the implementation of high-throughput phenotyping, the dynamics of biomass and nitrogen (N) accumulation of four sorghum genotypes with contrasting N-use efficiency were monitored upon the inoculation with synthetic microbial communities (SynComs) under high and low-N. Five SynComs comprising bacteria isolated from field grown sorghum were designed based on the overall phylar composition of bacteria and the enriched host compartment determined from a field-based culture independent study of the sorghum microbiome. We demonstrated that the growth response of sorghum to SynCom inoculation is genotype-specific and dependent on plant N status. The sorghum genotypes that were N-use inefficient were more susceptible to the colonization from a diverse set of inoculated bacteria as compared to the N-use efficient lines especially under low-N. By integrating high-throughput phenotyping with sequencing data, our findings highlight the roles of host genotype and plant nutritional status in determining colonization by bacterial synthetic communities.
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Affiliation(s)
- Yen Ning Chai
- Department of Agronomy and Horticulture and Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Yufeng Ge
- Department of Biological Systems Engineering, L.W. Chase Hall 203, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Vincent Stoerger
- Agricultural Research Division, Greenhouse Innovation Center, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Daniel P Schachtman
- Department of Agronomy and Horticulture and Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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Pankievicz VCS, do Amaral FP, Ané JM, Stacey G. Diazotrophic Bacteria and Their Mechanisms to Interact and Benefit Cereals. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2021; 34:491-498. [PMID: 33543986 DOI: 10.1094/mpmi-11-20-0316-fi] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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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Agbodjato NA, Adoko MY, Babalola OO, Amogou O, Badé FT, Noumavo PA, Adjanohoun A, Baba-Moussa L. Efficacy of Biostimulants Formulated With Pseudomonas putida and Clay, Peat, Clay-Peat Binders on Maize Productivity in a Farming Environment in Southern Benin. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.666718] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Maize plays a vital role in Benin's agricultural production systems. However, at the producer-level, yields are still low, although the production of this cereal is necessary for food security. The aims of this study were to assess the efficacy of solid biostimulants formulated from the rhizobacteria Pseudomonas putida and different binders on maize cultivation in the farming environment in three (03) study areas in South Benin. For this purpose, three (03) biostimulants were formulated based on Pseudomonas putida and the clay, peat and clay-peat combinations binders. The experimental design was a randomized block of four (04) treatments with 11 replicates per study area. Each replicate represented one producer. The trials were set up at 33 producers in the study areas of Adakplamè, Hayakpa and Zouzouvou in Southern Benin. The results obtained show that the best height, stem diameter, leaf area as obtained by applying biostimulants based on P. putida and half dose of NPK and Urea with respective increases of 15.75, 15.93, and 15.57% as compared to the full dose of NPK and Urea. Regarding maize yield, there was no significant difference between treatments and the different study areas. Taken together, the different biostimulants formulations were observed to be better than the farmers' practice in all the zones and for all the parameters evaluated, with the formulation involving Pseudomonas putida on the clay binder, and the half-dose of NPK and Urea showing the best result. The biostimulant formulated based on clay + Pseudomonas putida could be used in agriculture for a more sustainable and environmentally friendly maize production in Benin.
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Mitter EK, Tosi M, Obregón D, Dunfield KE, Germida JJ. Rethinking Crop Nutrition in Times of Modern Microbiology: Innovative Biofertilizer Technologies. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.606815] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Global population growth poses a threat to food security in an era of increased ecosystem degradation, climate change, soil erosion, and biodiversity loss. In this context, harnessing naturally-occurring processes such as those provided by soil and plant-associated microorganisms presents a promising strategy to reduce dependency on agrochemicals. Biofertilizers are living microbes that enhance plant nutrition by either by mobilizing or increasing nutrient availability in soils. Various microbial taxa including beneficial bacteria and fungi are currently used as biofertilizers, as they successfully colonize the rhizosphere, rhizoplane or root interior. Despite their great potential to improve soil fertility, biofertilizers have yet to replace conventional chemical fertilizers in commercial agriculture. In the last 10 years, multi-omics studies have made a significant step forward in understanding the drivers, roles, processes, and mechanisms in the plant microbiome. However, translating this knowledge on microbiome functions in order to capitalize on plant nutrition in agroecosystems still remains a challenge. Here, we address the key factors limiting successful field applications of biofertilizers and suggest potential solutions based on emerging strategies for product development. Finally, we discuss the importance of biosafety guidelines and propose new avenues of research for biofertilizer development.
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Li Y, Li Q, Chen S. Diazotroph Paenibacillus triticisoli BJ-18 Drives the Variation in Bacterial, Diazotrophic and Fungal Communities in the Rhizosphere and Root/Shoot Endosphere of Maize. Int J Mol Sci 2021; 22:1460. [PMID: 33540521 PMCID: PMC7867140 DOI: 10.3390/ijms22031460] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/26/2021] [Accepted: 01/27/2021] [Indexed: 12/28/2022] Open
Abstract
Application of diazotrophs (N2-fixing microorganisms) can decrease the overuse of nitrogen (N) fertilizer. Until now, there are few studies on the effects of diazotroph application on microbial communities of major crops. In this study, the diazotrophic and endospore-forming Paenibacillus triticisoli BJ-18 was inoculated into maize soils containing different N levels. The effects of inoculation on the composition and abundance of the bacterial, diazotrophic and fungal communities in the rhizosphere and root/shoot endosphere of maize were evaluated by sequencing the 16S rRNA, nifH gene and ITS (Inter Transcribed Spacer) region. P. triticisoli BJ-18 survived and propagated in all the compartments of the maize rhizosphere, root and shoot. The abundances and diversities of the bacterial and diazotrophic communities in the rhizosphere were significantly higher than in both root and shoot endospheres. Each compartment of the rhizosphere, root and shoot had its specific bacterial and diazotrophic communities. Our results showed that inoculation reshaped the structures of the bacterial, diazotrophic and fungal communities in the maize rhizosphere and endosphere. Inoculation reduced the interactions of the bacteria and diazotrophs in the rhizosphere and endosphere, while it increased the fungal interactions. After inoculation, the abundances of Pseudomonas, Bacillus and Paenibacillus in all three compartments, Klebsiella in the rhizosphere and Paenibacillus in the root and shoot were significantly increased, while the abundances of Fusarium and Giberella were greatly reduced. Paenibacillus was significantly correlated with plant dry weight, nitrogenase, N2-fixing rate, P solubilization and other properties of the soil and plant.
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Affiliation(s)
| | | | - Sanfeng Chen
- State Key Laboratory for Agrobiotechnology and College of Biological Sciences, China Agricultural University, Beijing 100094, China; (Y.L.); (Q.L.)
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Galindo FS, da Silva EC, Pagliari PH, Fernandes GC, Rodrigues WL, Biagini ALC, Baratella EB, da Silva Júnior CA, Moretti Neto MJ, Silva VM, Muraoka T, Teixeira Filho MCM. Nitrogen recovery from fertilizer and use efficiency response to Bradyrhizobium sp. and Azospirillum brasilense combined with N rates in cowpea-wheat crop sequence. APPLIED SOIL ECOLOGY 2021. [DOI: 10.1016/j.apsoil.2020.103764] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Fatima F, Hashim A, Anees S. Efficacy of nanoparticles as nanofertilizer production: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:1292-1303. [PMID: 33070292 DOI: 10.1007/s11356-020-11218-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 10/11/2020] [Indexed: 05/21/2023]
Abstract
Owing to the ever-increasing demand for food, the growing global population has forced farmers to increase fertilizer use. The overall use of fertilizers increased by 13 times between 1950 and 2020, from 15 to 194 million tons. Due to the resource shortages of chemical fertilizers on the market, agricultural costs are rising drastically every day because they cause an adverse impact on the environment by releasing chemical particulates and run-off agriculture. Biofertilizers have thus become a safer supplement to increase crop production without doing any harm to the environment, as they are produced industrially from a selected community of microorganisms that either develop a mutually beneficial relationship with plants or are part of their rhizosphere. They still have some drawbacks, which led to the development of a new avenue for the application of nanotechnology-mediated nanofertilizers. Nanotechnology recommends significant prospects for tailoring nanofertilizer production. They are typically coated with desired chemical composition having controlled release and targeted delivery of effective nanoscale ingredients, ability to improve plant productivity and to minimize environmental pollutants. The present review focuses primarily on the usefulness of nanofertilizers, as well as its environmental and safety concerns. The research would also include useful knowledge related to the introduction of different forms of nanoparticles within the agricultural field, contributing to the opening of a new route to nanorevolution.
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Affiliation(s)
- Faria Fatima
- Integral Institute of Agricultural Science and Technology, Integral University, Lucknow, 226026, India.
| | - Arshya Hashim
- Department of Biotechnology, Abeda Inamdar Sr. College of Arts, Science and Commerce, Pune, Maharashtra, 411001, India
| | - Sumaiya Anees
- Department of Biosciences Integral University, Lucknow, 226026, India
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Bobkova V, Anokhina T, Bjadovskiy I, Konovalov S. Effect of rhizosphere microorganisms on the adaptation of regenerated plants of apple clonal rootstocks to ex vitro conditions. BIO WEB OF CONFERENCES 2021. [DOI: 10.1051/bioconf/20213404003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In a vegetation experiment, the effect of bacterial preparations Extrasol, Fitosporin-M based on bacterial strains Bacillus subtilis and bacteria strains of the genus Pseudomonas – P. chlororaphis OV17, P. protegens 38a, P. putida О9-10 on the number of rhizosphere microorganisms, growth and development of regenerant plants of apple clone rootstocks in ex vitro conditions was studied. After 90 days of growing plants, the greatest number was found in the P. protegens 38a strain – 0.56 million CFU/g roots. Artificial inoculation of the roots of regenerant plants contributed to a significant increase in the total number of native microorganisms as compared to the control. The most diverse bacterial population in terms of cultural and morphological characteristics was revealed in the variant with the treatment of plants with the P. putida O9-10 strain. The introduced bacterial strains contributed to an increase in the adaptive capacity and had a phytostimulating effect on the development of plants. The plant survival rate in the process of adaptation to ex vitro conditions is most influenced by the P. putida 09-10 strain compared to the control. The bacterial preparation Fitosporin-M contributes to the improvement of biometric parameters of plant growth.
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The Importance of Microbial Inoculants in a Climate-Changing Agriculture in Eastern Mediterranean Region. ATMOSPHERE 2020. [DOI: 10.3390/atmos11101136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Climate change has gained importance due to its severe consequences for many aspects of life. Increasing temperature, drought and greenhouse gases affect directly or indirectly the productivity of agricultural and natural ecosystems as well as human health. The nutrient supply capacity of the soil is diminishing, while food requirements for the growing population are increasing. The ongoing application of agrochemicals results in adverse effects on ecosystem functioning and food chain. Now, more than ever, there is a need to mitigate the effects of agricultural activities on climate change using environmentally friendly techniques. The role of plant beneficial microorganisms on this global challenge is increasingly being explored, and there is strong evidence that could be important. The use of functional microbial guilds forms an alternative or even a supplementary approach to common agricultural practices, due to their ability to act as biofertilizers and promote plant growth. Application of microbial inocula has a significantly lower impact on the environment compared to chemical inputs, while the agricultural sector will financially benefit, and consumers will have access to quality products. Microbial inoculants could play an important role in agricultural stress management and ameliorate the negative impacts of climate change. This short review highlights the role of microbes in benefiting agricultural practices against climate-changing conditions. In particular, the main microbial plant growth-promoting functional traits that are related to climate change are presented and discussed. The importance of microbial inoculants’ multifunctionality is debated, while future needs and challenges are also highlighted.
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Plant growth-promoting rhizobacteria (PGPR) improve the growth and nutrient use efficiency in maize ( Zea mays L.) under water deficit conditions. Heliyon 2020; 6:e05106. [PMID: 33083600 PMCID: PMC7550905 DOI: 10.1016/j.heliyon.2020.e05106] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 04/15/2020] [Accepted: 09/25/2020] [Indexed: 11/22/2022] Open
Abstract
Drought is one of the major abiotic stresses that affects crop yield worldwide. An eco-friendly tool that can broadly improve plants' tolerance to water stress is bioionocula comprising plant growth-promoting rhizobacteria (PGPR). In this study, the effect of two PGPR Cupriavidus necator 1C2 (B1) and Pseudomonas fluorescens S3X (B2), singly and/or co-inoculated at two inocula sizes (S1 - 3 × 103 cells g-1 dry weight (dw) soil and S2 - 3 × 106 cells g-1 dw soil), on growth, nutrient uptake, and use efficiency was assessed in maize (Zea mays L.) plants grown at three levels of irrigation (80% of water holding capacity (WHC) - well-watered, 60% of WHC - moderate water deficit stress, and 40% of WHC - severe water deficit stress) in a greenhouse experiment. The impact of water deficit and bioinoculants on soil microbial activity (fluorescein diacetate hydrolysis) was also evaluated. Moderate and severe water deficit negatively affected soil microbial activity, as well as, maize growth, by reducing plants' shoot biomass and increasing root/shoot ratio at 60 and 40% of WHC. Bioinoculants mitigated the negative effects on shoot biomass, especially when PGPR were co-inoculated, increasing up to 89% the aerial biomass of plants exposed to moderate water deficit. Bioinoculation also increased nitrogen (N) and phosphorous (P) use efficiency, which may have led to higher maize growth under water deficit conditions. The size of the inocula applied had marginal influence on biometric and nutrient parameters, although the higher concentration of the mixture of PGPR was the most effective in improving shoot biomass under moderate water deficit. This study shows that rhizobacterial strains are able to increase nutrient use efficiency and to alleviate water stress effects in crops with high water demands and have potential applications to keep up with productivity in water stress scenarios.
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The Effect of Growth Activators and Plant Growth-Promoting Rhizobacteria (PGPR) on the Soil Properties, Root Yield, and Technological Quality of Sugar Beet. AGRONOMY-BASEL 2020. [DOI: 10.3390/agronomy10091262] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The strategy “from farm to fork” assumes a reduction in the usage of fertilizers and plant protection products in EU agriculture. The aim of this study, conducted over the years 2017–2019 in several locations in Poland, is to evaluate the application of growth activators with and without plant growth-promoting rhizobacteria to reduce mineral nitrogen fertilization without negative effects on the root yield. We studied the effect of these activators on selected soil properties. The experimental treatments included the application of the growth activators Penergetic (K + P) and Azoter, which contains the bacteria Azotobacter chroococcum, Azospirillum brasilense, and Bacillus megaterium, before sowing or during vegetation. The nitrogen rates were reduced by 30% in comparison to full nitrogen mineral fertilization (control treatment). In selected experiments, the application of Penergetic and Penergetic with Azoter caused a higher content of nitrate nitrogen (N-NO3) and ammonium nitrogen (N-NH4) after the sugar beet harvest as well as higher contents of mineral nitrogen (Nmin), P, K, and Mg in the soil in comparison to the treatment with the full dose of mineral nitrogen fertilization. The obtained results proved that it was possible to reduce the mineral application of nitrogen by 30% without a decrease in the biological and pure sugar yield, and even with an increase in the sugar yield caused by the application of the growth activators Penergetic (K + P) and Azoter.
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Vieira Velloso CC, de Oliveira CA, Gomes EA, Lana UGDP, de Carvalho CG, Guimarães LJM, Pastina MM, de Sousa SM. Genome-guided insights of tropical Bacillus strains efficient in maize growth promotion. FEMS Microbiol Ecol 2020; 96:5891423. [DOI: 10.1093/femsec/fiaa157] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 08/10/2020] [Indexed: 02/06/2023] Open
Abstract
ABSTRACT
Plant growth promoting bacteria (PGPB) are an efficient and sustainable alternative to mitigate biotic and abiotic stresses in maize. This work aimed to sequence the genome of two Bacillus strains (B116 and B119) and to evaluate their plant growth-promoting (PGP) potential in vitro and their capacity to trigger specific responses in different maize genotypes. Analysis of the genomic sequences revealed the presence of genes related to PGP activities. Both strains were able to produce biofilm and exopolysaccharides, and solubilize phosphate. The strain B119 produced higher amounts of IAA-like molecules and phytase, whereas B116 was capable to produce more acid phosphatase. Maize seedlings inoculated with either strains were submitted to polyethylene glycol-induced osmotic stress and showed an increase of thicker roots, which resulted in a higher root dry weight. The inoculation also increased the total dry weight and modified the root morphology of 16 out of 21 maize genotypes, indicating that the bacteria triggered specific responses depending on plant genotype background. Maize root remodeling was related to growth promotion mechanisms found in genomic prediction and confirmed by in vitro analysis. Overall, the genomic and phenotypic characterization brought new insights to the mechanisms of PGP in tropical Bacillus.
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Affiliation(s)
- Camila Cristina Vieira Velloso
- Universidade Federal de São João del-Rei, Rua Padre João Pimentel, 80 - Dom Bosco, São João del-Rei - MG, 36301-158, Brazil
| | - Christiane Abreu de Oliveira
- Centro Universitário de Sete Lagoas, Avenida Marechal Castelo Branco, 2765 - Santo Antonio, Sete Lagoas - MG, 35701-242, Brazil
- Embrapa Milho e Sorgo,Rodovia MG 424 Km 45, Zona Rural, Sete Lagoas - MG, 35701-970, Brazil
| | - Eliane Aparecida Gomes
- Embrapa Milho e Sorgo,Rodovia MG 424 Km 45, Zona Rural, Sete Lagoas - MG, 35701-970, Brazil
| | - Ubiraci Gomes de Paula Lana
- Centro Universitário de Sete Lagoas, Avenida Marechal Castelo Branco, 2765 - Santo Antonio, Sete Lagoas - MG, 35701-242, Brazil
- Embrapa Milho e Sorgo,Rodovia MG 424 Km 45, Zona Rural, Sete Lagoas - MG, 35701-970, Brazil
| | - Chainheny Gomes de Carvalho
- Centro Universitário de Sete Lagoas, Avenida Marechal Castelo Branco, 2765 - Santo Antonio, Sete Lagoas - MG, 35701-242, Brazil
| | | | - Maria Marta Pastina
- Universidade Federal de São João del-Rei, Rua Padre João Pimentel, 80 - Dom Bosco, São João del-Rei - MG, 36301-158, Brazil
- Embrapa Milho e Sorgo,Rodovia MG 424 Km 45, Zona Rural, Sete Lagoas - MG, 35701-970, Brazil
| | - Sylvia Morais de Sousa
- Universidade Federal de São João del-Rei, Rua Padre João Pimentel, 80 - Dom Bosco, São João del-Rei - MG, 36301-158, Brazil
- Centro Universitário de Sete Lagoas, Avenida Marechal Castelo Branco, 2765 - Santo Antonio, Sete Lagoas - MG, 35701-242, Brazil
- Embrapa Milho e Sorgo,Rodovia MG 424 Km 45, Zona Rural, Sete Lagoas - MG, 35701-970, Brazil
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Investigation of Azospirillum brasilense Inoculation and Silicon Application on Corn Yield Responses. JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION 2020. [DOI: 10.1007/s42729-020-00306-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Pereira LC, Bertuzzi Pereira C, Correia LV, Matera TC, dos Santos RF, de Carvalho C, Osipi EAF, Braccini AL. Corn Responsiveness to Azospirillum: Accessing the Effect of Root Exudates on the Bacterial Growth and Its Ability to Fix Nitrogen. PLANTS 2020; 9:plants9070923. [PMID: 32708226 PMCID: PMC7411751 DOI: 10.3390/plants9070923] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/06/2020] [Accepted: 07/10/2020] [Indexed: 01/26/2023]
Abstract
Corn has shown different degrees of positive response to inoculation with the nitrogen- fixing bacteria of the genera Azospirillum. Part of it has been attributed to the plant genotypic variation, including the root exudates, that are used by the bacteria as energy source. In this study, we grew two corn hybrids that differ for their response to Azospirillum, to investigate the effect of different exudates profiles on the bacteria growth and nitrogenase activity. Employing high performance liquid chromatography, we identified nine amino acids (asparagine, aspartic acid, serine, glutamic acid, valine, phenylalanine, threonine, tryptophan and alanine), six sugars (glucose, sucrose, xylose, arabinose, fructose and galactose) and four organic acids (citrate, malate, succinate and fumarate). The less responsive corn genotype showed reduced plant growth (root volume, shoot dry mass and shoot N content), a lower concentration of Azospirillum cells within the root tissues, a higher content of asparagine and glucose and a reduced amount of metabolites that serve as bacterial energy source (all organic acids + five sugars, excluding glucose). The genotypes did not interfere in the ability of Azospirillum to colonize the substrate, but the metabolites released by the less responsive one reduced the nitrogenase activity.
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Affiliation(s)
- Lucas Caiubi Pereira
- Department of Agronomy, Universidade Estadual de Maringá, Maringá-PR, CEP 87020-900, Brazil; (C.B.P.); (L.V.C.); (T.C.M.); (R.F.d.S.); (A.L.B.)
- Correspondence: ; Tel.: +55-44-30118963
| | - Carolina Bertuzzi Pereira
- Department of Agronomy, Universidade Estadual de Maringá, Maringá-PR, CEP 87020-900, Brazil; (C.B.P.); (L.V.C.); (T.C.M.); (R.F.d.S.); (A.L.B.)
| | - Larissa Vinis Correia
- Department of Agronomy, Universidade Estadual de Maringá, Maringá-PR, CEP 87020-900, Brazil; (C.B.P.); (L.V.C.); (T.C.M.); (R.F.d.S.); (A.L.B.)
| | - Thaisa Cavalieri Matera
- Department of Agronomy, Universidade Estadual de Maringá, Maringá-PR, CEP 87020-900, Brazil; (C.B.P.); (L.V.C.); (T.C.M.); (R.F.d.S.); (A.L.B.)
| | - Rayssa Fernanda dos Santos
- Department of Agronomy, Universidade Estadual de Maringá, Maringá-PR, CEP 87020-900, Brazil; (C.B.P.); (L.V.C.); (T.C.M.); (R.F.d.S.); (A.L.B.)
| | | | | | - Alessandro Lucca Braccini
- Department of Agronomy, Universidade Estadual de Maringá, Maringá-PR, CEP 87020-900, Brazil; (C.B.P.); (L.V.C.); (T.C.M.); (R.F.d.S.); (A.L.B.)
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Galindo FS, Buzetti S, Rodrigues WL, Boleta EHM, Silva VM, Tavanti RFR, Fernandes GC, Biagini ALC, Rosa PAL, Teixeira Filho MCM. Inoculation of Azospirillum brasilense associated with silicon as a liming source to improve nitrogen fertilization in wheat crops. Sci Rep 2020; 10:6160. [PMID: 32273589 PMCID: PMC7145820 DOI: 10.1038/s41598-020-63095-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 03/24/2020] [Indexed: 02/05/2023] Open
Abstract
This research was developed to investigate whether inoculation with Azospirillum brasilense in combination with silicon (Si) can enhance N use efficiency (NUE) in wheat and to evaluate and correlate nutritional and productive components and wheat grain yield. The study was carried out on a Rhodic Hapludox under a no-till system with a completely randomized block design with four replications in a 2 × 2 × 5 factorial scheme: two liming sources (with Ca and Mg silicate as the Si source and limestone); two inoculations (control - without inoculation and seed inoculation with A. brasilense) and five side-dress N rates (0, 50, 100, 150 and 200 kg ha-1). The results of this study showed positive improvements in wheat growth production parameters, NUE and grain yield as a function of inoculation associated with N rates. Inoculation can complement and optimize N fertilization, even with high N application rates. The potential benefits of Si use were less evident; however, the use of Si can favour N absorption, even when associated with A. brasilense. Therefore, studies conducted under tropical conditions with Ca and Mg silicate are necessary to better understand the role of Si applied alone or in combination with growth-promoting bacteria such as A. brasilense.
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Affiliation(s)
- Fernando Shintate Galindo
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil
| | - Salatiér Buzetti
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil
| | - Willian Lima Rodrigues
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil
| | - Eduardo Henrique Marcandalli Boleta
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil
| | - Vinicius Martins Silva
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil
| | - Renan Francisco Rimoldi Tavanti
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil
| | - Guilherme Carlos Fernandes
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil
| | - Antônio Leonardo Campos Biagini
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil
| | - Poliana Aparecida Leonel Rosa
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil
| | - Marcelo Carvalho Minhoto Teixeira Filho
- São Paulo State University (UNESP), College of Engineering of Ilha Solteira, Department of Plant Health, Rural Engineering, and Soils, P.O. BOX 15385-000, Av. Brasil Sul, 830 - Centro, Ilha Solteira, state of São Paulo, Brazil.
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Galindo FS, Pagliari PH, Buzetti S, Rodrigues WL, Santini JMK, Boleta EHM, Rosa PAL, Rodrigues Nogueira TA, Lazarini E, Filho MCMT. Can silicon applied to correct soil acidity in combination with Azospirillum brasilense inoculation improve nitrogen use efficiency in maize? PLoS One 2020; 15:e0230954. [PMID: 32267854 PMCID: PMC7141695 DOI: 10.1371/journal.pone.0230954] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 03/12/2020] [Indexed: 02/05/2023] Open
Abstract
Alternative management practices are needed to minimize the need for chemical fertilizer use in non-leguminous cropping systems. The use of biological agents that can fix atmospheric N has shown potential to improve nutrient availability in grass crops. This research was developed to investigate if inoculation with Azospirillum brasilense in combination with silicon (Si) can enhance N use efficiency (NUE) in maize. The study was set up in a Rhodic Hapludox under a no-till system, in a completely randomized block design with four replicates. Treatments were tested in a full factorial design and included: i) five side dress N rates (0 to 200 kg ha-1); ii) two liming sources (Ca and Mg silicate and dolomitic limestone); and iii) with and without seed inoculation with A. brasilense. Inoculation with A. brasilense was found to increase grain yield by 15% when N was omitted and up to 10% when N was applied. Inoculation also increased N accumulation in plant tissue. Inoculation and limestone application were found to increase leaf chlorophyll index, number of grains per ear, harvest index, and NUE. Inoculation increased harvest index and NUE by 9.5 and 19.3%, respectively, compared with non-inoculated plots. Silicon application increased leaf chlorophyll index and N-leaf concentration. The combination of Si and inoculation provided greater Si-shoot accumulation. This study showed positive improvements in maize growth production parameters as a result of inoculation, but the potential benefits of Si use were less evident. Further research should be conducted under growing conditions that provide some level of biotic or abiotic stress to study the true potential of Si application.
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Affiliation(s)
- Fernando Shintate Galindo
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, São Paulo, Brazil
| | - Paulo Humberto Pagliari
- Department of Soil, Water, and Climate, University of Minnesota, Southwest Research and Outreach Center, Lamberton, Minnesota, United States of America
| | - Salatiér Buzetti
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, São Paulo, Brazil
| | - Willian Lima Rodrigues
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, São Paulo, Brazil
| | | | | | - Poliana Aparecida Leonel Rosa
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, São Paulo, Brazil
| | | | - Edson Lazarini
- Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, São Paulo, Brazil
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Pereira NCM, Galindo FS, Gazola RPD, Dupas E, Rosa PAL, Mortinho ES, Filho MCMT. Corn Yield and Phosphorus Use Efficiency Response to Phosphorus Rates Associated With Plant Growth Promoting Bacteria. FRONTIERS IN ENVIRONMENTAL SCIENCE 2020. [DOI: 10.3389/fenvs.2020.00040] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Dal Cortivo C, Ferrari M, Visioli G, Lauro M, Fornasier F, Barion G, Panozzo A, Vamerali T. Effects of Seed-Applied Biofertilizers on Rhizosphere Biodiversity and Growth of Common Wheat ( Triticum aestivum L.) in the Field. FRONTIERS IN PLANT SCIENCE 2020; 11:72. [PMID: 32174929 PMCID: PMC7054350 DOI: 10.3389/fpls.2020.00072] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 01/17/2020] [Indexed: 05/24/2023]
Abstract
In order to reduce chemical fertilization and improve the sustainability of common wheat (Triticum aestivum L.) cultivation, maintaining at the same time high production and quality standards, this study investigated the effects of three commercial biofertilizers on rhizosphere bacterial biomass, biodiversity and enzymatic activity, and on plant growth and grain yield in a field trial. The wheat seeds were inoculated with the following aiding microrganisms: (i) a bacterial consortium (Azospirillum spp. + Azoarcus spp. + Azorhizobium spp.); and two mycorrhizal fungal-bacterial consortia, viz. (ii) Rhizophagus irregularis + Azotobacter vinelandii, and (iii) R. irregularis + Bacillus megaterium + Frateuria aurantia, and comparisons were made with noninoculated controls. We demonstrate that all the biofertilizers significantly enhanced plant growth and nitrogen accumulation during stem elongation and heading, but this was translated into only small grain yield gains (+1%-4% vs controls). The total gluten content of the flour was not affected, but in general biofertilization significantly upregulated two high-quality protein subunits, i.e., the 81 kDa high-molecular-weight glutenin subunit and the 43.6 kDa low-molecular-weight glutenin subunit. These effects were associated with increases in the rhizosphere microbial biomass and the activity of enzymes such as β-glucosidase, α-mannosidase, β-mannosidase, and xylosidase, which are involved in organic matter decomposition, particularly when Rhizophagus irregularis was included as inoculant. No changes in microbial biodiversity were observed. Our results suggest that seed-applied biofertilizers may be effectively exploited in sustainable wheat cultivation without altering the biodiversity of the resident microbiome, but attention should be paid to the composition of the microbial consortia in order to maximize their benefits in crop cultivation.
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Affiliation(s)
- Cristian Dal Cortivo
- Department of Agronomy, Food, Natural Resources, Animals and the Environment, University of Padua, Legnaro-Padua, Italy
| | - Manuel Ferrari
- Department of Agronomy, Food, Natural Resources, Animals and the Environment, University of Padua, Legnaro-Padua, Italy
| | - Giovanna Visioli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Marta Lauro
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Flavio Fornasier
- Research Centre for Viticulture and Enology, Council for Agricultural Research and Analysis of Agricultural Economics (CREA), Gorizia, Italy
| | - Giuseppe Barion
- Department of Agronomy, Food, Natural Resources, Animals and the Environment, University of Padua, Legnaro-Padua, Italy
| | - Anna Panozzo
- Department of Agronomy, Food, Natural Resources, Animals and the Environment, University of Padua, Legnaro-Padua, Italy
| | - Teofilo Vamerali
- Department of Agronomy, Food, Natural Resources, Animals and the Environment, University of Padua, Legnaro-Padua, Italy
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