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Sevillano-Caño J, García MJ, Córdoba-Galván C, Luque-Cruz C, Agustí-Brisach C, Lucena C, Ramos J, Pérez-Vicente R, Romera FJ. Exploring the Role of Debaryomyces hansenii as Biofertilizer in Iron-Deficient Environments to Enhance Plant Nutrition and Crop Production Sustainability. Int J Mol Sci 2024; 25:5729. [PMID: 38891917 PMCID: PMC11171756 DOI: 10.3390/ijms25115729] [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: 04/25/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 06/21/2024] Open
Abstract
The European "Green Deal" policies are shifting toward more sustainable and environmentally conscious agricultural practices, reducing the use of chemical fertilizer and pesticides. This implies exploring alternative strategies. One promising alternative to improve plant nutrition and reinforce plant defenses is the use of beneficial microorganisms in the rhizosphere, such as "Plant-growth-promoting rhizobacteria and fungi". Despite the great abundance of iron (Fe) in the Earth's crust, its poor solubility in calcareous soil makes Fe deficiency a major agricultural issue worldwide. Among plant promoting microorganisms, the yeast Debaryomyces hansenii has been very recently incorporated, for its ability to induce morphological and physiological key responses to Fe deficiency in plants, under hydroponic culture conditions. The present work takes it a step further and explores the potential of D. hansenii to improve plant nutrition and stimulate growth in cucumber plants grown in calcareous soil, where ferric chlorosis is common. Additionally, the study examines D. hansenii's ability to induce systemic resistance (ISR) through a comparative relative expression study by qRT-PCR of ethylene (ET) biosynthesis (ACO1), or ET signaling (EIN2 and EIN3), and salicylic acid (SA) biosynthesis (PAL)-related genes. The results mark a significant milestone since D. hansenii not only enhances nutrient uptake and stimulates plant growth and flower development but could also amplify induced systemic resistance (ISR). Although there is still much work ahead, these findings make D. hansenii a promising candidate to be used for sustainable and environmentally friendly integrated crop management.
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Affiliation(s)
- Jesús Sevillano-Caño
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2024, Campus de Excelencia Internacional Agroalimentario de Rabanales (ceiA3), Universidad de Córdoba, 14071 Córdoba, Spain; (J.S.-C.); (C.C.-G.); (C.L.-C.); (C.A.-B.); (C.L.); (F.J.R.)
| | - María José García
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2024, Campus de Excelencia Internacional Agroalimentario de Rabanales (ceiA3), Universidad de Córdoba, 14071 Córdoba, Spain; (J.S.-C.); (C.C.-G.); (C.L.-C.); (C.A.-B.); (C.L.); (F.J.R.)
| | - Clara Córdoba-Galván
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2024, Campus de Excelencia Internacional Agroalimentario de Rabanales (ceiA3), Universidad de Córdoba, 14071 Córdoba, Spain; (J.S.-C.); (C.C.-G.); (C.L.-C.); (C.A.-B.); (C.L.); (F.J.R.)
| | - Carmen Luque-Cruz
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2024, Campus de Excelencia Internacional Agroalimentario de Rabanales (ceiA3), Universidad de Córdoba, 14071 Córdoba, Spain; (J.S.-C.); (C.C.-G.); (C.L.-C.); (C.A.-B.); (C.L.); (F.J.R.)
| | - Carlos Agustí-Brisach
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2024, Campus de Excelencia Internacional Agroalimentario de Rabanales (ceiA3), Universidad de Córdoba, 14071 Córdoba, Spain; (J.S.-C.); (C.C.-G.); (C.L.-C.); (C.A.-B.); (C.L.); (F.J.R.)
| | - Carlos Lucena
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2024, Campus de Excelencia Internacional Agroalimentario de Rabanales (ceiA3), Universidad de Córdoba, 14071 Córdoba, Spain; (J.S.-C.); (C.C.-G.); (C.L.-C.); (C.A.-B.); (C.L.); (F.J.R.)
| | - José Ramos
- Departamento de Química Agrícola, Edafología y Microbiología, Campus de Excelencia Internacional Agroalimentario de Rabanales (ceiA3), Universidad de Córdoba, 14071 Córdoba, Spain;
| | - Rafael Pérez-Vicente
- Departamento de Botánica, Ecología y Fisiología Vegetal, Campus de Excelencia Internacional Agroalimentario de Rabanales (ceiA3), Universidad de Córdoba, 14071 Córdoba, Spain;
| | - Francisco Javier Romera
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2024, Campus de Excelencia Internacional Agroalimentario de Rabanales (ceiA3), Universidad de Córdoba, 14071 Córdoba, Spain; (J.S.-C.); (C.C.-G.); (C.L.-C.); (C.A.-B.); (C.L.); (F.J.R.)
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Zhang K, Wang H, Tappero R, Bhatnagar JM, Vilgalys R, Barry K, Keymanesh K, Tejomurthula S, Grigoriev IV, Kew WR, Eder EK, Nicora CD, Liao HL. Ectomycorrhizal fungi enhance pine growth by stimulating iron-dependent mechanisms with trade-offs in symbiotic performance. THE NEW PHYTOLOGIST 2024; 242:1645-1660. [PMID: 38062903 DOI: 10.1111/nph.19449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 11/13/2023] [Indexed: 04/26/2024]
Abstract
Iron (Fe) is crucial for metabolic functions of living organisms. Plants access occluded Fe through interactions with rhizosphere microorganisms and symbionts. Yet, the interplay between Fe addition and plant-mycorrhizal interactions, especially the molecular mechanisms underlying mycorrhiza-assisted Fe processing in plants, remains largely unexplored. We conducted mesocosms in Pinus plants inoculated with different ectomycorrhizal fungi (EMF) Suillus species under conditions with and without Fe coatings. Meta-transcriptomic, biogeochemical, and X-ray fluorescence imaging analyses were applied to investigate early-stage mycorrhizal roots. While Fe addition promoted Pinus growth, it concurrently reduced mycorrhiza formation rate, symbiosis-related metabolites in plant roots, and aboveground plant carbon and macronutrient content. This suggested potential trade-offs between Fe-enhanced plant growth and symbiotic performance. However, the extent of this trade-off may depend on interactions between host plants and EMF species. Interestingly, dual EMF species were more effective at facilitating plant Fe uptake by inducing diverse Fe-related functions than single-EMF species. This subsequently triggered various Fe-dependent physiological and biochemical processes in Pinus roots, significantly contributing to Pinus growth. However, this resulted in a greater carbon allocation to roots, relatively reducing the aboveground plant carbon content. Our study offers critical insights into how EMF communities rebalance benefits of Fe-induced effects on symbiotic partners.
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Affiliation(s)
- Kaile Zhang
- North Florida Research and Education Center, University of Florida, 155 Research Road, Quincy, FL, 32351, USA
- Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL, 32611, USA
| | - Haihua Wang
- North Florida Research and Education Center, University of Florida, 155 Research Road, Quincy, FL, 32351, USA
- Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL, 32611, USA
| | - Ryan Tappero
- Brookhaven National Laboratory, NSLS-II, Upton, NY, 11973, USA
| | | | - Rytas Vilgalys
- Department of Biology, Duke University, 130 Science Drive, Durham, NC, 27708, USA
| | - Kerrie Barry
- U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Keykhosrow Keymanesh
- U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Sravanthi Tejomurthula
- U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Igor V Grigoriev
- U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA
| | - William R Kew
- Environmental Molecular Science Laboratory, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Elizabeth K Eder
- Environmental Molecular Science Laboratory, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Carrie D Nicora
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Hui-Ling Liao
- North Florida Research and Education Center, University of Florida, 155 Research Road, Quincy, FL, 32351, USA
- Department of Soil, Water, and Ecosystem Sciences, University of Florida, Gainesville, FL, 32611, USA
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Huang K, Li M, Li R, Rasul F, Shahzad S, Wu C, Shao J, Huang G, Li R, Almari S, Hashem M, Aamer M. Soil acidification and salinity: the importance of biochar application to agricultural soils. FRONTIERS IN PLANT SCIENCE 2023; 14:1206820. [PMID: 37780526 PMCID: PMC10537949 DOI: 10.3389/fpls.2023.1206820] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 07/18/2023] [Indexed: 10/03/2023]
Abstract
Soil acidity is a serious problem in agricultural lands as it directly affects the soil, crop production, and human health. Soil acidification in agricultural lands occurs due to the release of protons (H+) from the transforming reactions of various carbon, nitrogen, and sulfur-containing compounds. The use of biochar (BC) has emerged as an excellent tool to manage soil acidity owing to its alkaline nature and its appreciable ability to improve the soil's physical, chemical, and biological properties. The application of BC to acidic soils improves soil pH, soil organic matter (SOM), cation exchange capacity (CEC), nutrient uptake, microbial activity and diversity, and enzyme activities which mitigate the adverse impacts of acidity on plants. Further, BC application also reduce the concentration of H+ and Al3+ ions and other toxic metals which mitigate the soil acidity and supports plant growth. Similarly, soil salinity (SS) is also a serious concern across the globe and it has a direct impact on global production and food security. Due to its appreciable liming potential BC is also an important amendment to mitigate the adverse impacts of SS. The addition of BC to saline soils improves nutrient homeostasis, nutrient uptake, SOM, CEC, soil microbial activity, enzymatic activity, and water uptake and reduces the accumulation of toxic ions sodium (Na+ and chloride (Cl-). All these BC-mediated changes support plant growth by improving antioxidant activity, photosynthesis efficiency, stomata working, and decrease oxidative damage in plants. Thus, in the present review, we discussed the various mechanisms through which BC improves the soil properties and microbial and enzymatic activities to counter acidity and salinity problems. The present review will increase the existing knowledge about the role of BC to mitigate soil acidity and salinity problems. This will also provide new suggestions to readers on how this knowledge can be used to ameliorate acidic and saline soils.
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Affiliation(s)
- Kai Huang
- China Guangxi Key Laboratory of Water Engineering Materials and Structures, Guangxi Hydraulic Research Institute, Nanning, China
| | - Mingquan Li
- China Guangxi Key Laboratory of Water Engineering Materials and Structures, Guangxi Hydraulic Research Institute, Nanning, China
| | - Rongpeng Li
- China Guangxi Key Laboratory of Water Engineering Materials and Structures, Guangxi Hydraulic Research Institute, Nanning, China
| | - Fahd Rasul
- Department of Agronomy, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Sobia Shahzad
- Islamia University of Bahawalpur, Bahawalnagar, Pakistan
| | - Changhong Wu
- China Guangxi Key Laboratory of Water Engineering Materials and Structures, Guangxi Hydraulic Research Institute, Nanning, China
| | - Jinhua Shao
- China Guangxi Key Laboratory of Water Engineering Materials and Structures, Guangxi Hydraulic Research Institute, Nanning, China
- Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, China
| | - Guoqin Huang
- Department of Agronomy, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Ronghui Li
- College of Civil Engineering and Architecture, Guangxi University, Nanning, China
| | - Saad Almari
- King Khalid University, College of Science, Department of Biology, Abha, Saudi Arabia
| | - Mohamed Hashem
- King Khalid University, College of Science, Department of Biology, Abha, Saudi Arabia
| | - Muhammad Aamer
- Department of Agronomy, University of Agriculture Faisalabad, Faisalabad, Pakistan
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4
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Liu Y, Xiong Z, Wu W, Ling HQ, Kong D. Iron in the Symbiosis of Plants and Microorganisms. PLANTS (BASEL, SWITZERLAND) 2023; 12:1958. [PMID: 37653875 PMCID: PMC10223382 DOI: 10.3390/plants12101958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 05/08/2023] [Accepted: 05/08/2023] [Indexed: 09/02/2023]
Abstract
Iron is an essential element for most organisms. Both plants and microorganisms have developed different mechanisms for iron uptake, transport and storage. In the symbiosis systems, such as rhizobia-legume symbiosis and arbuscular mycorrhizal (AM) symbiosis, maintaining iron homeostasis to meet the requirements for the interaction between the host plants and the symbiotic microbes is a new challenge. This intriguing topic has drawn the attention of many botanists and microbiologists, and many discoveries have been achieved so far. In this review, we discuss the current progress on iron uptake and transport in the nodules and iron homeostasis in rhizobia-legume symbiosis. The discoveries with regard to iron uptake in AM fungi, iron uptake regulation in AM plants and interactions between iron and other nutrient elements during AM symbiosis are also summarized. At the end of this review, we propose prospects for future studies in this fascinating research area.
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Affiliation(s)
- Yi Liu
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China; (Y.L.)
| | - Zimo Xiong
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China; (Y.L.)
| | - Weifeng Wu
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China; (Y.L.)
| | - Hong-Qing Ling
- Hainan Yazhou Bay Seed Laboratory, Sanya 572024, China;
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Danyu Kong
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China; (Y.L.)
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5
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Entomopathogenic Fungi-Mediated Solubilization and Induction of Fe Related Genes in Melon and Cucumber Plants. J Fungi (Basel) 2023; 9:jof9020258. [PMID: 36836372 PMCID: PMC9960893 DOI: 10.3390/jof9020258] [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: 02/01/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023] Open
Abstract
Endophytic insect pathogenic fungi have a multifunctional lifestyle; in addition to its well-known function as biocontrol agents, it may also help plants respond to other biotic and abiotic stresses, such as iron (Fe) deficiency. This study explores M. brunneum EAMa 01/58-Su strain attributes for Fe acquisition. Firstly, direct attributes include siderophore exudation (in vitro assay) and Fe content in shoots and in the substrate (in vivo assay) were evaluated for three strains of Beauveria bassiana and Metarhizium bruneum. The M. brunneum EAMa 01/58-Su strain showed a great ability to exudate iron siderophores (58.4% surface siderophores exudation) and provided higher Fe content in both dry matter and substrate compared to the control and was therefore selected for further research to unravel the possible induction of Fe deficiency responses, Ferric Reductase Activity (FRA), and relative expression of Fe acquisition genes by qRT-PCR in melon and cucumber plants.. In addition, root priming by M. brunneum EAMa 01/58-Su strain elicited Fe deficiency responses at transcriptional level. Our results show an early up-regulation (24, 48 or 72 h post inoculation) of the Fe acquisition genes FRO1, FRO2, IRT1, HA1, and FIT as well as the FRA. These results highlight the mechanisms involved in the Fe acquisition as mediated by IPF M. brunneum EAMa 01/58-Su strain.
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6
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Schmaltz S, Silva MA, Ninaus RG, Guedes JVC, Zabot GL, Tres MV, Mazutti MA. Biomolecules in modern and sustainable agriculture. 3 Biotech 2023; 13:70. [PMID: 36742447 PMCID: PMC9889597 DOI: 10.1007/s13205-023-03486-2] [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: 12/04/2022] [Accepted: 01/18/2023] [Indexed: 02/03/2023] Open
Abstract
This review presents scientific findings which indicate biomolecules are excellent candidates for the development of biopesticides. Efforts are being done to find routes to increase their concentrations in the cultivation media because this concentration facilitates applications, storage, and transportation. Some of these routes are co-fermentation and ultrasound-assisted fermentation. Ultrasonication increases metabolite production and growth rates by improvement of cell permeability and nutrient uptake rates through cell membranes. For example, 24% increase in the enzymatic activity of cellulases produced by Trichoderma reesei in solid-state fermentation was achieved with ultrasonication. Also, chitinase and β-1,3-glucanase productions were stimulated by ultrasound in Beauveria bassiana cultivation, presenting positive results. The common parameters evaluated in the production of biomolecules by ultrasound-assisted fermentation are the duty cycle, time of application, power, energetic density, and how long the sonication is maintained in the fermentation media. Many successful cases are reported and discussed, which include the final formulation of bioproducts for agricultural applications. In this trend, nanotechnology is a promising tool for the development of nanoformulations. Nanoemulsification, green synthesis, biosynthesis, or biogenic synthesis are technologies used to produce such nanoformulations, allowing the controlled release of control agents, as well as the delivery of biomolecules to specific targets.
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Affiliation(s)
- Silvana Schmaltz
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900 Brazil
| | - Marco Antônio Silva
- São Carlos School of Engineering, University of São Paulo, 400, Trabalhador São-Carlense Avenue, São Carlos, SP 13566-590 Brazil
| | - Renata Gulart Ninaus
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900 Brazil
| | - Jerson Vanderlei Carus Guedes
- Department of Plant Protection, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900 Brazil
| | - Giovani Leone Zabot
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040, Sete de Setembro St., Center DC, Cachoeira Do Sul, RS 96508-010 Brazil
| | - Marcus Vinícius Tres
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040, Sete de Setembro St., Center DC, Cachoeira Do Sul, RS 96508-010 Brazil
| | - Marcio Antonio Mazutti
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900 Brazil
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Bolan N, Sarmah AK, Bordoloi S, Bolan S, Padhye LP, Van Zwieten L, Sooriyakumar P, Khan BA, Ahmad M, Solaiman ZM, Rinklebe J, Wang H, Singh BP, Siddique KHM. Soil acidification and the liming potential of biochar. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 317:120632. [PMID: 36384210 DOI: 10.1016/j.envpol.2022.120632] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/02/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
Soil acidification in managed ecosystems such as agricultural lands principally results from the increased releasing of protons (H+) from the transformation reactions of carbon (C), nitrogen (N) and sulphur (S) containing compounds. The incorporation of liming materials can neutralize the protons released, hence reducing soil acidity and its adverse impacts to the soil environment, food security, and human health. Biochar derived from organic residues is becoming a source of carbon input to soil and provides multifunctional values. Biochar can be alkaline in nature, with the level of alkalinity dependent upon the feedstock and processing conditions. This review covers the fundamental aspects of soil acidification and of the use of biochar to address constraints related to acidic soil. Biochar is increasingly considered as an effective soil amendment for reducing soil acidity owing to its liming potential, thereby enhancing soil fertility and productivity in acid soils. The ameliorant effect on acid soils is mainly because of the dissolution of carbonates, (hydro)-oxides of the ash fraction of biochar and potential use by microorganisms.
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Affiliation(s)
- Nanthi Bolan
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia.
| | - Ajit K Sarmah
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia; Department of Civil and Environmental Engineering, Faculty of Engineering, The University of Auckland, Private Bag 92010, Auckland, 1142, New Zealand
| | - Sanandam Bordoloi
- Prairie Research Institute-Illinois Sustainable Technology Centre, University of Illinois at Urbana Champaign, Illinois, USA
| | - Shankar Bolan
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
| | - Lokesh P Padhye
- Department of Civil and Environmental Engineering, Faculty of Engineering, The University of Auckland, Private Bag 92010, Auckland, 1142, New Zealand
| | | | - Prasanthi Sooriyakumar
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
| | - Basit Ahmed Khan
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Mahtab Ahmad
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Zakaria M Solaiman
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6001, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan 173212, Himachal Pradesh, India
| | - Hailong Wang
- Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong, 528000, People's Republic of China; Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Bhupinder Pal Singh
- Department of Primary Industries, Elizabeth Macarthur Agricultural Institute, Menangle, Australia
| | - Kadambot H M Siddique
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia
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Powell A, Wilder SL, Housh AB, Scott S, Benoit M, Powell G, Waller S, Guthrie JM, Schueller MJ, Ferrieri RA. Examining effects of rhizobacteria in relieving abiotic crop stresses using carbon-11 radiotracing. PHYSIOLOGIA PLANTARUM 2022; 174:e13675. [PMID: 35316539 PMCID: PMC9310733 DOI: 10.1111/ppl.13675] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 02/24/2022] [Accepted: 03/17/2022] [Indexed: 06/12/2023]
Abstract
In agriculture, plant growth promoting bacteria (PGPB) are increasingly used for reducing environmental stress-related crop losses through mutualistic actions of these microorganisms, activating physiological and biochemical responses, building tolerances within their hosts. Here we report the use of radioactive carbon-11 (t½ 20.4 min) to examine the metabolic and physiological responses of Zea mays to Azospirillum brasilense (HM053) inoculation while plants were subjected to salinity and low nitrogen stresses. Host metabolism of "new" carbon resources (as 11 C) and physiology including [11 C]-photosynthate translocation were measured in response to imposed growth conditions. Salinity stress caused shortened, dense root growth with a 6-fold increase in foliar [11 C]-raffinose, a potent osmolyte. ICP-MS analyses revealed increased foliar Na+ levels at the expense of K+ . HM053 inoculation relieved these effects, reinstating normal root growth, lowering [11 C]-raffinose levels while increasing [11 C]-sucrose and its translocation to the roots. Na+ levels remained elevated with inoculation, but K+ levels were boosted slightly. Low nitrogen stress yielded longer roots possessing high levels of anthocyanins. Metabolic analysis revealed significant shifts in "new" carbon partitioning into the amino acid pool under low nitrogen stress, with significant increases in foliar [11 C]-glutamate, [11 C]-aspartate, and [11 C]-asparagine, a noted osmoprotectant. 11 CO2 fixation and [11 C]-photosynthate translocation also decreased, limiting carbon supply to roots. However, starch levels in roots were reduced under nitrogen limitation, suggesting that carbon repartitioning could be a compensatory action to support root growth. Finally, inoculation with HM053 re-instated normal root growth, reduced anthocyanin, boosted root starch, and returned 11 C-allocation levels back to those of unstressed plants.
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Affiliation(s)
- Avery Powell
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
- School of Natural ResourcesUniversity of MissouriColumbiaMissouriUSA
| | - Stacy L. Wilder
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
| | - Alexandra B. Housh
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
- Chemistry DepartmentUniversity of MissouriColumbiaMissouriUSA
- Interdisciplinary Plant GroupUniversity of MissouriColumbiaMissouriUSA
| | - Stephanie Scott
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
- Department of BiochemistryUniversity of MissouriColumbiaMissouriUSA
| | - Mary Benoit
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
- Division of Plant Sciences and TechnologyUniversity of MissouriColumbiaMissouriUSA
| | - Garren Powell
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
- Department of BiochemistryUniversity of MissouriColumbiaMissouriUSA
| | - Spenser Waller
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
- School of Natural ResourcesUniversity of MissouriColumbiaMissouriUSA
| | - James M. Guthrie
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
| | - Michael J. Schueller
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
- Chemistry DepartmentUniversity of MissouriColumbiaMissouriUSA
| | - Richard A. Ferrieri
- Missouri Research Reactor CenterUniversity of MissouriColumbiaMissouriUSA
- Chemistry DepartmentUniversity of MissouriColumbiaMissouriUSA
- Interdisciplinary Plant GroupUniversity of MissouriColumbiaMissouriUSA
- Division of Plant Sciences and TechnologyUniversity of MissouriColumbiaMissouriUSA
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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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10
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Lucena C, Alcalá-Jiménez MT, Romera FJ, Ramos J. Several Yeast Species Induce Iron Deficiency Responses in Cucumber Plants ( Cucumis sativus L.). Microorganisms 2021; 9:microorganisms9122603. [PMID: 34946203 PMCID: PMC8704622 DOI: 10.3390/microorganisms9122603] [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: 11/05/2021] [Revised: 12/14/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022] Open
Abstract
Iron (Fe) deficiency is a first-order agronomic problem that causes a significant decrease in crop yield and quality. Paradoxically, Fe is very abundant in most soils, mainly in its oxidized form, but is poorly soluble and with low availability for plants. In order to alleviate this situation, plants develop different morphological and physiological Fe-deficiency responses, mainly in their roots, to facilitate Fe mobilization and acquisition. Even so, Fe fertilizers, mainly Fe chelates, are widely used in modern agriculture, causing environmental problems and increasing the costs of production, due to the high prices of these products. One of the most sustainable and promising alternatives to the use of agrochemicals is the better management of the rhizosphere and the beneficial microbial communities presented there. The main objective of this research has been to evaluate the ability of several yeast species, such as Debaryomyces hansenii, Saccharomyces cerevisiae and Hansenula polymorpha, to induce Fe-deficiency responses in cucumber plants. To date, there are no studies on the roles played by yeasts on the Fe nutrition of plants. Experiments were carried out with cucumber plants grown in a hydroponic growth system. The effects of the three yeast species on some of the most important Fe-deficiency responses developed by dicot (Strategy I) plants, such as enhanced ferric reductase activity and Fe2+ transport, acidification of the rhizosphere, and proliferation of subapical root hairs, were evaluated. The results obtained show the inductive character of the three yeast species, mainly of Debaryomyces hansenii and Hansenula polymorpha, on the Fe-deficiency responses evaluated in this study. This opens a promising line of study on the use of these microorganisms as Fe biofertilizers in a more sustainable and environmentally friendly agriculture.
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Affiliation(s)
- Carlos Lucena
- Department of Agronomy (DAUCO-María de Maeztu Unit of Excellence), Edificio C-4, Campus de Rabanales CeiA3, Universidad de Córdoba, 14071 Córdoba, Spain; (C.L.); (F.J.R.)
| | - María T. Alcalá-Jiménez
- Department of Agricultural Chemistry, Edaphology and Microbiology, Edificio C-6, Campus de Rabanales CeiA3, Universidad de Córdoba, 14071 Córdoba, Spain;
| | - Francisco J. Romera
- Department of Agronomy (DAUCO-María de Maeztu Unit of Excellence), Edificio C-4, Campus de Rabanales CeiA3, Universidad de Córdoba, 14071 Córdoba, Spain; (C.L.); (F.J.R.)
| | - José Ramos
- Department of Agricultural Chemistry, Edaphology and Microbiology, Edificio C-6, Campus de Rabanales CeiA3, Universidad de Córdoba, 14071 Córdoba, Spain;
- Correspondence:
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11
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Prabhakar PK. Bacterial Siderophores and Their Potential Applications: A Review. Curr Mol Pharmacol 2021; 13:295-305. [PMID: 32418535 DOI: 10.2174/1874467213666200518094445] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 04/15/2020] [Accepted: 04/23/2020] [Indexed: 12/16/2022]
Abstract
The bacterial infection is one of the major health issues throughout the world. To protect humans from the infection and infectious agents, it is important to understand the mechanism of interaction of pathogens along with their susceptible hosts. This will help us to develop a novel strategy for designing effective new drugs or vaccines. As iron is an essential metal ion required for all the living systems for their growth, as well, it is needed by pathogenic bacterial cells for their growth and development inside host tissues. To get iron from the host tissues, microbes developed an iron-chelating system called siderophore and also corresponding receptors. Siderophores are low molecular weight organic complex produced by different strains of bacteria for the procurement of iron from the environment or host body under the iron deficient-conditions. Mostly in the environment at physiological pH, the iron is present in the ferric ionic form (Fe3+), which is water- insoluble and thus inaccessible for them. Such a condition promotes the generation of siderophores. These siderophores have been used in different areas such as agriculture, treatment of diseases, culture the unculturable strains of bacteria, promotion of plant growth, controlling phytopathogens, detoxification of heavy metal contamination, etc. In the medical field, siderophores can be used as "Trojan Horse Strategy", which forms a complex with antibiotics and also delivers these antibiotics to the desired locations, especially in antibiotic-resistant bacteria. The promising application of siderophore-based use of antibiotics for the management of bacterial resistance can be strategies to be used.
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Affiliation(s)
- Pranav Kumar Prabhakar
- Department of Transdisciplinary Research, Lovely Professional University, Phagwara, Punjab-144411, India
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12
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Li J, Cao X, Jia X, Liu L, Cao H, Qin W, Li M. Iron Deficiency Leads to Chlorosis Through Impacting Chlorophyll Synthesis and Nitrogen Metabolism in Areca catechu L. FRONTIERS IN PLANT SCIENCE 2021; 12:710093. [PMID: 34408765 PMCID: PMC8365612 DOI: 10.3389/fpls.2021.710093] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 07/06/2021] [Indexed: 05/25/2023]
Abstract
Deficiency of certain elements can cause leaf chlorosis in Areca catechu L. trees, which causes considerable production loss. The linkage between nutrient deficiency and chlorosis phenomenon and physiological defect in A. catechu remains unclear. Here, we found that low iron supply is a determinant for chlorosis of A. catechu seedling, and excessive iron supply resulted in dark green leaves. We also observed morphological characters of A. catechu seedlings under different iron levels and compared their fresh weight, chlorophyll contents, chloroplast structures and photosynthetic activities. Results showed that iron deficiency directly caused chloroplast degeneration and reduced chlorophyll synthesis in chlorosis leaves, while excessive iron treatment can increase chlorophyll contents, chloroplasts sizes, and inflated starch granules. However, both excessive and deficient of iron decreases fresh weight and photosynthetic rate in A. catechu seedlings. Therefore, we applied transcriptomic and metabolomic approaches to understand the effect of different iron supply to A. catechu seedlings. The genes involved in nitrogen assimilation pathway, such as NR (nitrate reductase) and GOGAT (glutamate synthase), were significantly down-regulated under both iron deficiency and excessive iron. Moreover, the accumulation of organic acids and flavonoids indicated a potential way for A. catechu to endure iron deficiency. On the other hand, the up-regulation of POD-related genes was assumed to be a defense strategy against the excessive iron toxicity. Our data demonstrated that A. catechu is an iron-sensitive species, therefore the precise control of iron level is believed to be the key point for A. catechu cultivation.
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Affiliation(s)
- Jia Li
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, China
| | - Xianmei Cao
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, China
| | - Xiaocheng Jia
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, China
| | - Liyun Liu
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, China
| | - Haowei Cao
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, China
| | - Weiquan Qin
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, China
| | - Meng Li
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, China
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, China
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13
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Nakib D, Slatni T, Di Foggia M, Rombolà AD, Abdelly C. Changes in organic compounds secreted by roots in two Poaceae species (Hordeum vulgare and Polypogon monspenliensis) subjected to iron deficiency. JOURNAL OF PLANT RESEARCH 2021; 134:151-163. [PMID: 33411147 DOI: 10.1007/s10265-020-01237-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 10/30/2020] [Indexed: 06/12/2023]
Abstract
Despite their economic and ecological interests, Poaceae are affected by the low availability of iron in calcareous soils. Several studies focused on the capacity of this family to secrete phytosiderophores and organic acids as a mechanism of tolerance to iron deficiency. This work aimed at studying the physiological responses of two Poaceae species; Hordeum vulgare (cultivated barley) and Polypogon monspenliensis (spontaneous species) to iron deficiency, and evaluate especially the release of phytosiderophores and organic acids. For this purpose, seedlings of these two species were cultivated in complete nutrient solution with or without iron. The biomass production, iron status, phytosiderophores and organic acids release by roots were studied. The results demonstrated that Polypogon monspenliensis was relatively more tolerant to iron deficiency than Hordeum vulgare. Polypogon monspenliensis had the ability to secrete a higher amount of phytosiderophores and organic acids, especially citric, acetic, oxalic and malic acids, compared to Hordeum vulgare. We propose this spontaneous species as a forage plant in calcareous soils and in intercropping systems with fruit trees to prevent iron chlorosis.
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Affiliation(s)
- Dorsaf Nakib
- Laboratoire Des Plantes Extrêmophiles (LPE), Centre de Biotechnologie de Borj Cedria (CBBC), BP 901, 2050, Hammam Lif, Tunisie
- Department of Agricultural and Food Science, University of Bologne, Viale Fanin 44, 40127, Bologne, Italy
- Faculté Des Sciences de Bizerte (FSB), Département de Biologie, Université de Carthage (UCAR), Avenue de la République, BP 77-1054, Amilcar, Tunisie
| | - Tarek Slatni
- Laboratoire Des Plantes Extrêmophiles (LPE), Centre de Biotechnologie de Borj Cedria (CBBC), BP 901, 2050, Hammam Lif, Tunisie.
- Faculté Des Sciences de Tunis (FST), Département de Biologie, Université de Tunis El Manar (UTM), 1060, Tunis, Tunisie.
| | - Michele Di Foggia
- Faculté Des Sciences de Bizerte (FSB), Département de Biologie, Université de Carthage (UCAR), Avenue de la République, BP 77-1054, Amilcar, Tunisie
| | - Adamo Domenico Rombolà
- Faculté Des Sciences de Bizerte (FSB), Département de Biologie, Université de Carthage (UCAR), Avenue de la République, BP 77-1054, Amilcar, Tunisie
| | - Chedly Abdelly
- Laboratoire Des Plantes Extrêmophiles (LPE), Centre de Biotechnologie de Borj Cedria (CBBC), BP 901, 2050, Hammam Lif, Tunisie
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Malakar A, Kaiser M, Snow DD, Walia H, Panda B, Ray C. Ferrihydrite Reduction Increases Arsenic and Uranium Bioavailability in Unsaturated Soil. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:13839-13848. [PMID: 33081469 DOI: 10.1021/acs.est.0c02670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Redox driven mobilization and plant uptake of contaminants under transiently saturated soil conditions need to be clarified to ensure food and water quality across different irrigation systems. We postulate that solid-phase iron reduction in anoxic microsites present in the rhizosphere of unsaturated soil is a key driver for mobilization and bioavailability of contaminants under nonflooded irrigation. To clarify this, two major crops, corn and soybean differing in iron uptake strategies, were grown in irrigated synthetic soil under semiarid conditions with gravimetric moisture content ∼12.5 ± 2.4%. 2-line ferrihydrite, which was coprecipitated with uranium and arsenic, served as the only iron source in soil. Irrespective of crop type, reduced iron was detected in pore water and postexperiment rhizosphere soil confirming ferrihydrite reduction. These results support the presence of localized anoxic microsites in the otherwise aerobic porous bulk soil causing reduction of ferrihydrite and concomitant increase in plant uptake of comobilized contaminants. Our findings indicate that reactive iron minerals undergo reductive dissolution inside anoxic microsites of primarily unsaturated soil, which may have implications on the mobility of trace element contaminants such as arsenic and uranium in irrigated unsaturated soils, accounting for 55% of the irrigated area in the US.
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Affiliation(s)
- Arindam Malakar
- Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute, University of Nebraska, Lincoln, Nebraska 68583-0844, United States
| | - Michael Kaiser
- Department of Agronomy, University of Nebraska, Plant Science Hall 279I, Lincoln, Nebraska 68583-0915, United States
| | - Daniel D Snow
- School of Natural Resources and Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute, 202 Water Sciences Laboratory, University of Nebraska, Lincoln, Nebraska 68583-0844, United States
| | - Harkamal Walia
- Department of Agronomy and Horticulture, University of Nebraska, Lincoln, Nebraska 68583-0915, United States
| | - Banajarani Panda
- Department of Earth and Atmospheric Sciences, University of Nebraska, Lincoln, Nebraska 68588-0340, United States
- Department of Earth Sciences, Annamalai University, Annamalai Nagar, 608002 India
| | - Chittaranjan Ray
- Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute, University of Nebraska, 2021 Transformation Drive, Lincoln, Nebraska 68588-6204, United States
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15
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Suchan DM, Bergsveinson J, Manzon L, Pierce A, Kryachko Y, Korber D, Tan Y, Tambalo DD, Khan NH, Whiting M, Yost CK. Transcriptomics reveal core activities of the plant growth-promoting bacterium Delftia acidovorans RAY209 during interaction with canola and soybean roots. Microb Genom 2020; 6:mgen000462. [PMID: 33151138 PMCID: PMC7725335 DOI: 10.1099/mgen.0.000462] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 10/13/2020] [Indexed: 01/21/2023] Open
Abstract
The plant growth-promoting rhizobacterium Delftia acidovorans RAY209 is capable of establishing strong root attachment during early plant development at 7 days post-inoculation. The transcriptional response of RAY209 was measured using RNA-seq during early (day 2) and sustained (day 7) root colonization of canola plants, capturing RAY209 differentiation from a medium-suspended cell state to a strongly root-attached cell state. Transcriptomic data was collected in an identical manner during RAY209 interaction with soybean roots to explore the putative root colonization response to this globally relevant crop. Analysis indicated there is an increased number of significantly differentially expressed genes between medium-suspended and root-attached cells during early soybean root colonization relative to sustained colonization, while the opposite temporal pattern was observed for canola root colonization. Regardless of the plant host, root-attached RAY209 cells exhibited the least amount of differential gene expression between early and sustained root colonization. Root-attached cells of either canola or soybean roots expressed high levels of a fasciclin gene homolog encoding an adhesion protein, as well as genes encoding hydrolases, multiple biosynthetic processes, and membrane transport. Notably, while RAY209 ABC transporter genes of similar function were transcribed during attachment to either canola or soybean roots, several transporter genes were uniquely differentially expressed during colonization of the respective plant hosts. In turn, both canola and soybean plants expressed genes encoding pectin lyase and hydrolases - enzymes with purported function in remodelling extracellular matrices in response to RAY209 colonization. RAY209 exhibited both a core regulatory response and a planthost-specific regulatory response to root colonization, indicating that RAY209 specifically adjusts its cellular activities to adapt to the canola and soybean root environments. This transcriptomic data defines the basic RAY209 response as both a canola and soybean commercial crop and seed inoculant.
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Affiliation(s)
- Danae M. Suchan
- Department of Biology, University of Regina, Regina, SK, Canada
| | | | - Lori Manzon
- Department of Biology, University of Regina, Regina, SK, Canada
| | - Alexa Pierce
- Department of Biology, University of Regina, Regina, SK, Canada
- Lallemand Plant Care North America, Saskatoon, SK, Canada
| | - Yuriy Kryachko
- Department of Food and Bioproduct Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Darren Korber
- Department of Food and Bioproduct Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Yifang Tan
- Aquatic Crop Resource Development, National Research Council, Saskatoon, SK, Canada
| | | | - Nurul H. Khan
- Lallemand Plant Care North America, Saskatoon, SK, Canada
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Yasmeen T, Ahmad A, Arif MS, Mubin M, Rehman K, Shahzad SM, Iqbal S, Rizwan M, Ali S, Alyemeni MN, Wijaya L. Biofilm forming rhizobacteria enhance growth and salt tolerance in sunflower plants by stimulating antioxidant enzymes activity. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 156:242-256. [PMID: 32979797 DOI: 10.1016/j.plaphy.2020.09.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 09/04/2020] [Indexed: 05/25/2023]
Abstract
Salinity stress is one of the major environmental stresses that impose global socio-economic impacts, as well as hindering crop productivity. Halotolerant plant growth-promoting rhizobacteria (PGPR) having potential to cope with salinity stress can be employed to counter this issue in eco-friendly way. In the present investigation, halotolerant PGPR strains, AP6 and PB5, were isolated from saline soil and characterized for their biochemical, molecular and physiological traits. Sequencing of 16 S rRNA gene and comparative analysis confirmed the taxonomic affiliation of AP6 with Bacillus licheniformis and PB5 with Pseudomonas plecoglossicida. The study was carried out in pots with different levels of induced soil salinity viz. 0, 5, 10 and 15 dSm-1 to evaluate the potential of bacterial inoculants in counteracting salinity stress in sunflower at different plant growth stages (30, 45 and 60 days after sowing). Both the bacterial inoculants were capable of producing indole acetic acid and biofilm, solubilizing inorganic rock phosphate, and also expressed ACC deaminase activity. The PGPR inoculated plants showed significantly higher fresh and dry biomass, plant height, root length and yield plant-1. Ameliorative significance of applied bacterial inoculants was also evidenced by mitigating oxidative stress through upregulation of catalase (CAT), superoxide dismutase (SOD) and guaiacol peroxidase (GPX) antioxidant enzymes. Increase in photosynthetic pigments, gas exchange activities and nutrient uptake are crucial salt stress adaptations, which were enhanced with the inoculation of salt tolerant biofilm producing PGPR in sunflower plants. Although increase in salinity stress levels has gradually decreased the plant's output compared to non-salinized plants, the plants inoculated with PGPR confronted salinity stress in much better way than uninoculated plants. Owing to the wide action spectrum of these bacterial inoculants, it was concluded that these biofilm PGPR could serve as effective bioinoculants and salinity stress alleviator for sunflower (oil seed crop) by increasing crop productivity in marginalized agricultural systems.
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Affiliation(s)
- Tahira Yasmeen
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan.
| | - Aqeel Ahmad
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan
| | - Muhammad Saleem Arif
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan
| | - Muhammad Mubin
- Centre of Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad, Pakistan
| | - Khadija Rehman
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan
| | - Sher Muhammad Shahzad
- Department of Soil and Environmental Sciences, University College of Agriculture, University of Sargodha, Sargodha, 40100, Punjab, Pakistan
| | - Shahid Iqbal
- Key Laboratory for Economic Plants and Biotechnology, Centre for Mountain Futures CMF, East and Central Asia Regional Office, World Agroforestry Centre ICRAF, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, CN 650201, China
| | - Muhammad Rizwan
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University Faisalabad, 38000, Pakistan; Department of Biological Sciences and Technology, China Medical University, Taichung, 40402, Taiwan.
| | - Mohammed Nasser Alyemeni
- Department of Botany and Microbiology, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Leonard Wijaya
- Department of Botany and Microbiology, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
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17
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Concha C, Doerner P. The impact of the rhizobia-legume symbiosis on host root system architecture. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3902-3921. [PMID: 32337556 PMCID: PMC7316968 DOI: 10.1093/jxb/eraa198] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 04/22/2020] [Indexed: 05/20/2023]
Abstract
Legumes form symbioses with rhizobia to fix N2 in root nodules to supplement their nitrogen (N) requirements. Many studies have shown how symbioses affect the shoot, but far less is understood about how they modify root development and root system architecture (RSA). RSA is the distribution of roots in space and over time. RSA reflects host resource allocation into below-ground organs and patterns of host resource foraging underpinning its resource acquisition capacity. Recent studies have revealed a more comprehensive relationship between hosts and symbionts: the latter can affect host resource acquisition for phosphate and iron, and the symbiont's production of plant growth regulators can enhance host resource flux and abundance. We review the current understanding of the effects of rhizobia-legume symbioses on legume root systems. We focus on resource acquisition and allocation within the host to conceptualize the effect of symbioses on RSA, and highlight opportunities for new directions of research.
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Affiliation(s)
- Cristobal Concha
- Institute for Molecular Plant Science, School of Biological Sciences, University of Edinburgh, Edinburgh, UK
| | - Peter Doerner
- Institute for Molecular Plant Science, School of Biological Sciences, University of Edinburgh, Edinburgh, UK
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18
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Pozdnyakova-Filatova I, Petrikov K, Vetrova A, Frolova A, Streletskii R, Zakharova M. The Naphthalene Catabolic Genes of Pseudomonas putida BS3701: Additional Regulatory Control. Front Microbiol 2020; 11:1217. [PMID: 32582120 PMCID: PMC7291925 DOI: 10.3389/fmicb.2020.01217] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/13/2020] [Indexed: 11/13/2022] Open
Abstract
Pseudomonas microorganisms are used for bioremediation of soils contaminated with petroleum hydrocarbons. The overall remediation efficiency is largely dependent on the presence of macro- and micronutrients. Widely varying concentrations of available nitrogen and iron (Fe) in soils were shown to affect residual hydrocarbons in the course of biodegradation. The regulatory mechanisms of expression of hydrocarbon catabolic genes in low nitrogen/low iron conditions remain unclear. The catabolism of naphthalene, a two-ring polycyclic aromatic hydrocarbon, has been well studied in pseudomonads in terms of the involvement of specific transcriptional activators, thus making it useful in revealing additional regulatory control of the adaptation of hydrocarbon destructors to a low level of the essential nutrients. The Pseudomonas putida strain BS3701 is a component of the "MicroBak" preparation for soil remediation. Previously, this strain was shown to contain genes encoding the key enzymes for naphthalene catabolism: naphthalene 1,2-dioxygenase, salicylate hydroxylase, catechol 2,3-dioxygenase, and catechol 1,2-dioxygenase. Our study aimed to clarify whether the naphthalene catabolic gene expression is dependent on the amount of nitrogen and iron in the growth culture medium, and if so, at exactly which stages the expression is regulated. We cultivated the strain in low nitrogen/low iron conditions with the concurrent evaluation of the activity of the key enzymes and the mRNA level of genes encoding these enzymes. We are the first to report that naphthalene catabolic genes are subject not only to transcriptional but also post-transcriptional regulation.
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Affiliation(s)
- Irina Pozdnyakova-Filatova
- Laboratory of Molecular Microbiology, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Federal Research Center, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino, Russia
| | - Kirill Petrikov
- Laboratory of Plasmid Biology, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Federal Research Center, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino, Russia
| | - Anna Vetrova
- Laboratory of Plasmid Biology, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Federal Research Center, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino, Russia
| | - Alina Frolova
- Laboratory of Bacteriophage Biology, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Federal Research Center, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino, Russia
| | - Rostislav Streletskii
- Laboratory of Ecological Soil Science, Lomonosov Moscow State University, Moscow, Russia
| | - Marina Zakharova
- Laboratory of Molecular Microbiology, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Federal Research Center, G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino, Russia
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19
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Effects of Trichoderma asperellum and its siderophores on endogenous auxin in Arabidopsis thaliana under iron-deficiency stress. Int Microbiol 2020; 23:501-509. [PMID: 32080772 DOI: 10.1007/s10123-020-00122-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/21/2020] [Accepted: 01/21/2020] [Indexed: 12/24/2022]
Abstract
Iron (Fe) deficiency is one of the major limiting factors affecting crop yields. Trichoderma asperellum Q1, a biocontrol and plant growth promoting fungus, can produce the siderophore which has a high affinity to Fe3+ in the absence of iron. In this study, Trichoderma asperellum Q1 was found to be able to promote growth of Arabidopsis thaliana in an iron-deficient or insoluble iron-containing (Fe2O3) medium. It also can produce more siderophore and indole-3-acetic acid (IAA) as the concentration of iron ions decreased. However, it is unclear that the relationship between siderophore and IAA in promoting plant growth. Both Trichoderma asperellum Q1 and siderophore promotes not only the DR5::GFP transgenic Arabidopsis thaliana seedlings, in which the root IAA is labeled by green fluorescent protein gene, but also increases the content of endogenous IAA in the roots, which was shown by the fluorescence study. The strongest fluorescence was observed in the treated group inoculated with Trichoderma asperellum Q1 under the condition of insoluble iron. In the case of iron-free medium, adding siderophore also increased the observed fluorescence intensity. These results suggest that the siderophores produced by Trichoderma asperellum Q1 increased the content of IAA in Arabidopsis roots by enhancing the conversion of poorly soluble iron or by the siderophore itself.
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Jinal HN, Gopi K, Prittesh P, Kartik VP, Amaresan N. Phytoextraction of iron from contaminated soils by inoculation of iron-tolerant plant growth-promoting bacteria in Brassica juncea L. Czern. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:32815-32823. [PMID: 31502049 DOI: 10.1007/s11356-019-06394-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 09/02/2019] [Indexed: 05/22/2023]
Abstract
Iron (Fe) is one of the essential micronutrients for all living organisms. Despite its abundance in most of the contaminated soil, it is usually in unavailable forms. The unavailable form of Fe could be mobilized to plants by the use of microorganisms. This study was carried out to show that the Fe-contaminated field soils could be used to accumulate Fe in the plant parts using bacterial inoculation. For this, from a set of bacterial isolates, four Fe-tolerant bacteria were selected and identified based on 16S rRNA gene sequencing. The Fe-tolerant bacteria belonged to the genus Bacillus toyonensis (MG430287), Rhodococcus hoagii (MG432495), Lysinibacillus mangiferihumi (MG432492), and Lysinibacillus fusiformis (MG430290). Screening of plant growth-promoting properties of these isolates revealed that all isolates were able to produce indole acetic acid (50.0-84.0 μg/ml), siderophore, and potassium solubilization (except R. hoagii). Pot assay using Fe-contaminated ((8.07-8.35 g kg-1) soils River Directorate of India) revealed that Fe-tolerant bacteria enhanced the growth of Brassica juncea and its biomass. Besides the improved plant growth, the inoculated plants also showed an overall percentage increase in the uptake of iron in root, stem, and leaf (57.91-128.31%) compared with uninoculated plants. In addition to enhanced plant growth attributes, the isolates also improved the total chlorophyll content and antioxidant properties such as total phenol, proline, and ascorbic acid oxidase. Thus, the results clearly indicated that these isolates could be used as a bioinoculant to improve the sequestration of Fe from the contaminated soils and alleviation of Fe stress in plants.
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Affiliation(s)
- Hardik Naik Jinal
- C. G. Bhakta Institute of Biotechnology, Uka Tarsadia University, Maliba Campus, Bardoli, Surat, Gujarat, 394 350, India
| | - Kachhadiya Gopi
- C. G. Bhakta Institute of Biotechnology, Uka Tarsadia University, Maliba Campus, Bardoli, Surat, Gujarat, 394 350, India
| | - Patel Prittesh
- C. G. Bhakta Institute of Biotechnology, Uka Tarsadia University, Maliba Campus, Bardoli, Surat, Gujarat, 394 350, India
| | - Vinodbhai Patel Kartik
- Department of Biosciences, Veer Narmad South Gujarat University, Udhna Magdalla Road, Surat, Gujarat, 395 007, India
| | - Natarajan Amaresan
- C. G. Bhakta Institute of Biotechnology, Uka Tarsadia University, Maliba Campus, Bardoli, Surat, Gujarat, 394 350, India.
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21
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Biochemical and molecular identification of Solanum lycopersicum L. temperature tolerant bacterial endophytes. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101409] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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22
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Catechol-Loading Nanofibrous Membranes for Eco-Friendly Iron Nutrition of Plants. NANOMATERIALS 2019; 9:nano9091315. [PMID: 31540053 PMCID: PMC6781093 DOI: 10.3390/nano9091315] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/04/2019] [Accepted: 09/08/2019] [Indexed: 01/22/2023]
Abstract
Modern agriculture requires more efficient and low-impact products and formulations than traditional agrochemicals to improve crop yields. Iron is a micronutrient essential for plant growth and photosynthesis, but it is mostly present in insoluble forms in ecosystems so that it is often limiting for plants. This study was aimed at combining natural strategies and biodegradable nanostructured materials to create environmentally friendly and low-toxic bioactive products capable of both supplying iron to Fe-deficient plants and reducing the impact of agricultural products on the environment. Consequently, free-standing electrospun nanofibrous polycaprolactone/polyhydroxybutyrate thin membranes loaded with catechol (CL-NMs) as an iron-chelating natural agent (at two concentrations) were fabricated on purpose to mobilize Fe from insoluble forms and transfer it to duckweed (Lemna minor L.) plants. The effectiveness of CL-NMs in providing iron to Fe-deficient plants, upon catechol release, tested in duckweeds grown for 4 days under controlled hydroponic conditions, displayed temporal variations in both photosynthetic efficiency and biometric parameters measured by chlorophyll fluorescence and growth imaging. Duckweeds supplied with CL-NMs hosting higher catechol concentrations recovered most of the physiological and growth performances previously impaired by Fe limitation. The absence of short-term toxicity of these materials on duckweeds also proved the low impact on ecosystems of these products.
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23
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Carrasco J, Preston GM. Growing edible mushrooms: a conversation between bacteria and fungi. Environ Microbiol 2019; 22:858-872. [DOI: 10.1111/1462-2920.14765] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 07/23/2019] [Accepted: 07/27/2019] [Indexed: 12/29/2022]
Affiliation(s)
- Jaime Carrasco
- Department of Plant SciencesUniversity of Oxford, S Parks Rd Oxford OX1 3RB UK
- Centro Tecnológico de Investigación del Champiñón de La Rioja (CTICH) Autol Spain
| | - Gail M. Preston
- Department of Plant SciencesUniversity of Oxford, S Parks Rd Oxford OX1 3RB UK
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24
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Romera FJ, García MJ, Lucena C, Martínez-Medina A, Aparicio MA, Ramos J, Alcántara E, Angulo M, Pérez-Vicente R. Induced Systemic Resistance (ISR) and Fe Deficiency Responses in Dicot Plants. FRONTIERS IN PLANT SCIENCE 2019; 10:287. [PMID: 30915094 PMCID: PMC6421314 DOI: 10.3389/fpls.2019.00287] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 02/21/2019] [Indexed: 05/03/2023]
Abstract
Plants develop responses to abiotic stresses, like Fe deficiency. Similarly, plants also develop responses to cope with biotic stresses provoked by biological agents, like pathogens and insects. Some of these responses are limited to the infested damaged organ, but other responses systemically spread far from the infested organ and affect the whole plant. These latter responses include the Systemic Acquired Resistance (SAR) and the Induced Systemic Resistance (ISR). SAR is induced by pathogens and insects while ISR is mediated by beneficial microbes living in the rhizosphere, like bacteria and fungi. These root-associated mutualistic microbes, besides impacting on plant nutrition and growth, can further boost plant defenses, rendering the entire plant more resistant to pathogens and pests. In the last years, it has been found that ISR-eliciting microbes can induce both physiological and morphological responses to Fe deficiency in dicot plants. These results suggest that the regulation of both ISR and Fe deficiency responses overlap, at least partially. Indeed, several hormones and signaling molecules, like ethylene (ET), auxin, and nitric oxide (NO), and the transcription factor MYB72, emerged as key regulators of both processes. This convergence between ISR and Fe deficiency responses opens the way to the use of ISR-eliciting microbes as Fe biofertilizers as well as biopesticides. This review summarizes the progress in the understanding of the molecular overlap in the regulation of ISR and Fe deficiency responses in dicot plants. Root-associated mutualistic microbes, rhizobacteria and rhizofungi species, known for their ability to induce morphological and/or physiological responses to Fe deficiency in dicot plant species are also reviewed herein.
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Affiliation(s)
- Francisco J. Romera
- Department of Agronomy, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - María J. García
- Department of Botany, Ecology and Plant Physiology, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - Carlos Lucena
- Department of Botany, Ecology and Plant Physiology, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - Ainhoa Martínez-Medina
- Molecular Interaction Ecology, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Miguel A. Aparicio
- Department of Microbiology, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - José Ramos
- Department of Microbiology, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - Esteban Alcántara
- Department of Agronomy, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - Macarena Angulo
- Department of Agronomy, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
| | - Rafael Pérez-Vicente
- Department of Botany, Ecology and Plant Physiology, Campus de Excelencia Internacional Agroalimentario CeiA3, Universidad de Córdoba, Córdoba, Spain
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25
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El Mujtar V, Muñoz N, Prack Mc Cormick B, Pulleman M, Tittonell P. Role and management of soil biodiversity for food security and nutrition; where do we stand? GLOBAL FOOD SECURITY-AGRICULTURE POLICY ECONOMICS AND ENVIRONMENT 2019. [DOI: 10.1016/j.gfs.2019.01.007] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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26
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Regulatory Role of Rhizobacteria to Induce Drought and Salt Stress Tolerance in Plants. SUSTAINABLE DEVELOPMENT AND BIODIVERSITY 2019. [DOI: 10.1007/978-3-030-30926-8_11] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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27
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Kim YC, Anderson AJ. Rhizosphere pseudomonads as probiotics improving plant health. MOLECULAR PLANT PATHOLOGY 2018; 19:2349-2359. [PMID: 29676842 PMCID: PMC6638116 DOI: 10.1111/mpp.12693] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 04/08/2018] [Accepted: 04/18/2018] [Indexed: 05/25/2023]
Abstract
Many root-colonizing microbes are multifaceted in traits that improve plant health. Although isolates designated as biological control agents directly reduce pathogen growth, many exert additional beneficial features that parallel changes induced in animal and other hosts by health-promoting microbes termed probiotics. Both animal and plant probiotics cause direct antagonism of pathogens and induce systemic immunity in the host to pathogens and other stresses. They also alter host development and improve host nutrition. The probiotic root-colonizing pseudomonads are generalists in terms of plant hosts, soil habitats and the array of stress responses that are ameliorated in the plant. This article illustrates how the probiotic pseudomonads, nurtured by the carbon (C) and nitrogen (N) sources released by the plant in root exudates, form protective biofilms on the root surface and produce the metabolites or enzymes to boost plant health. The findings reveal the multifunctional nature of many of the microbial metabolites in the plant-probiotic interplay. The beneficial effects of probiotics on plant function can contribute to sustainable yield and quality in agricultural production.
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Affiliation(s)
- Young Cheol Kim
- Department of Applied Biology, College of Agriculture and Life SciencesChonnam National UniversityGwangju 61186South Korea
| | - Anne J. Anderson
- Department of Biological EngineeringUtah State UniversityLoganUT 84322‐4105USA
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28
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Gramibactin is a bacterial siderophore with a diazeniumdiolate ligand system. Nat Chem Biol 2018; 14:841-843. [DOI: 10.1038/s41589-018-0101-9] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 06/08/2018] [Indexed: 02/01/2023]
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29
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Anderson AJ, McLean JE, Jacobson AR, Britt DW. CuO and ZnO Nanoparticles Modify Interkingdom Cell Signaling Processes Relevant to Crop Production. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6513-6524. [PMID: 28481096 DOI: 10.1021/acs.jafc.7b01302] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
As the world population increases, strategies for sustainable agriculture are needed to fulfill the global need for plants for food and other commercial products. Nanoparticle formulations are likely to be part of the developing strategies. CuO and ZnO nanoparticles (NPs) offer potential as fertilizers, as they provide bioavailable essential metals, and as pesticides, because of dose-dependent toxicity. Effects of these metal oxide NPs on rhizosphere functions are the focus of this review. These NPs at doses of ≥10 mg metal/kg change the production of key metabolites involved in plant protection in a root-associated microbe, Pseudomonas chlororaphis O6. Altered synthesis occurs in the microbe for phenazines, which function in plant resistance to pathogens, the pyoverdine-like siderophore that enhances Fe bioavailability in the rhizosphere and indole-3-acetic acid affecting plant growth. In wheat seedlings, reprogramming of root morphology involves increases in root hair proliferation (CuO NPs) and lateral root formation (ZnO NPs). Systemic changes in wheat shoot gene expression point to altered regulation for metal stress resilience as well as the potential for enhanced survival under stress commonly encountered in the field. These responses to the NPs cross kingdoms involving the bacteria, fungi, and plants in the rhizosphere. Our challenge is to learn how to understand the value of these potential changes and successfully formulate the NPs for optimal activity in the rhizosphere of crop plants. These formulations may be integrated into developing practices to ensure the sustainability of crop production.
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Affiliation(s)
- Anne J Anderson
- Department of Biology , Utah State University , Logan , Utah 84322-5305 , United States
| | - Joan E McLean
- Department of Civil and Environmental Engineering, Utah Water Research Laboratory , Utah State University , Logan , Utah 84322-8200 , United States
| | - Astrid R Jacobson
- Department of Plants, Soils and Climate , Utah State University , Logan , Utah 84322-4820 , United States
| | - David W Britt
- Department of Bioengineering , Utah State University , Logan , Utah 84322-4105 , United States
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30
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Bonebrake M, Anderson K, Valiente J, Jacobson A, McLean JE, Anderson A, Britt DW. Biofilms Benefiting Plants Exposed to ZnO and CuO Nanoparticles Studied with a Root-Mimetic Hollow Fiber Membrane. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6619-6627. [PMID: 28926236 DOI: 10.1021/acs.jafc.7b02524] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Plants exist with a consortium of microbes that influence plant health, including responses to biotic and abiotic stress. While nanoparticle (NP)-plant interactions are increasingly studied, the effect of NPs on the plant microbiome is less researched. Here a root-mimetic hollow fiber membrane (HFM) is presented for generating biofilms of plant-associated microbes nurtured by artificial root exudates (AREs) to correlate exudate composition with biofilm formation and response to NPs. Two microbial isolates from field-grown wheat, a bacillus endophyte and a pseudomonad root surface colonizer, were examined on HFMs fed with AREs varying in N and C composition. Bacterial morphology and biofilm architecture were characterized using scanning electron microscopy (SEM) and atomic force microscopy (AFM) and responses to CuO and ZnO NP challenges of 300 mg/L evaluated. The bacillus isolate sparsely colonized the HFM. In contrast, the pseudomonad formed robust biofilms within 3 days. Dependent on nutrient sources, the biofilm cells produced extensive extracellular polymeric substances (EPS) and large intracellular granules. Pseudomonad biofilms were minimally affected by ZnO NPs. CuO NPs, when introduced before biofilm maturation, strongly reduced biofilm formation. The findings demonstrate the utility of the HFM root-mimetic to study rhizoexudate influence on biofilms of root-colonizing microbes but without active plant metabolism. The results will allow better understanding of how microbe-rhizoexudate-NP interactions affect microbial and plant health.
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Affiliation(s)
- Michelle Bonebrake
- Department of Biological Engineering , Utah State University , Logan , Utah 84322 , United States
| | - Kaitlyn Anderson
- Department of Biological Engineering , Utah State University , Logan , Utah 84322 , United States
| | - Jonathan Valiente
- Department of Biological Engineering , Utah State University , Logan , Utah 84322 , United States
| | - Astrid Jacobson
- Plants Soils Climate , Utah State University , Logan , Utah 84322 , United States
| | - Joan E McLean
- Utah Water Research Laboratory , Utah State University , Logan , Utah 84322 , United States
| | - Anne Anderson
- Department of Biology , Utah State University , Logan , Utah 84322 , United States
| | - David W Britt
- Department of Biological Engineering , Utah State University , Logan , Utah 84322 , United States
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31
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Tamayo E, Knight SAB, Valderas A, Dancis A, Ferrol N. The arbuscular mycorrhizal fungus Rhizophagus irregularis
uses a reductive iron assimilation pathway for high-affinity iron uptake. Environ Microbiol 2018; 20:1857-1872. [DOI: 10.1111/1462-2920.14121] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 03/26/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Elisabeth Tamayo
- Departamento de Microbiología del Suelo y Sistemas Simbióticos; Estación Experimental del Zaidín, CSIC; Granada Spain
| | - Simon A. B. Knight
- Department of Medicine, Division of Hematology-Oncology; Perelman School of Medicine, University of Pennsylvania; Philadelphia PA USA
| | - Ascensión Valderas
- Departamento de Microbiología del Suelo y Sistemas Simbióticos; Estación Experimental del Zaidín, CSIC; Granada Spain
| | - Andrew Dancis
- Department of Medicine, Division of Hematology-Oncology; Perelman School of Medicine, University of Pennsylvania; Philadelphia PA USA
| | - Nuria Ferrol
- Departamento de Microbiología del Suelo y Sistemas Simbióticos; Estación Experimental del Zaidín, CSIC; Granada Spain
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Mertens M, Höss S, Neumann G, Afzal J, Reichenbecher W. Glyphosate, a chelating agent-relevant for ecological risk assessment? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:5298-5317. [PMID: 29294235 PMCID: PMC5823954 DOI: 10.1007/s11356-017-1080-1] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 12/18/2017] [Indexed: 05/30/2023]
Abstract
Glyphosate-based herbicides (GBHs), consisting of glyphosate and formulants, are the most frequently applied herbicides worldwide. The declared active ingredient glyphosate does not only inhibit the EPSPS but is also a chelating agent that binds macro- and micronutrients, essential for many plant processes and pathogen resistance. GBH treatment may thus impede uptake and availability of macro- and micronutrients in plants. The present study investigated whether this characteristic of glyphosate could contribute to adverse effects of GBH application in the environment and to human health. According to the results, it has not been fully elucidated whether the chelating activity of glyphosate contributes to the toxic effects on plants and potentially on plant-microorganism interactions, e.g., nitrogen fixation of leguminous plants. It is also still open whether the chelating property of glyphosate is involved in the toxic effects on organisms other than plants, described in many papers. By changing the availability of essential as well as toxic metals that are bound to soil particles, the herbicide might also impact soil life, although the occurrence of natural chelators with considerably higher chelating potentials makes an additional impact of glyphosate for most metals less likely. Further research should elucidate the role of glyphosate (and GBH) as a chelator, in particular, as this is a non-specific property potentially affecting many organisms and processes. In the process of reevaluation of glyphosate its chelating activity has hardly been discussed.
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Affiliation(s)
- Martha Mertens
- Institute for Biodiversity Network e.V. (ibn), Nußbergerstr. 6a, 93059, Regensburg, Germany.
| | - Sebastian Höss
- Institute for Biodiversity Network e.V. (ibn), Nußbergerstr. 6a, 93059, Regensburg, Germany
| | - Günter Neumann
- Institute of Crop Science (340h), University of Hohenheim, 70599, Stuttgart, Germany
| | - Joshua Afzal
- Institute of Crop Science (340h), University of Hohenheim, 70599, Stuttgart, Germany
| | - Wolfram Reichenbecher
- Federal Agency for Nature Conservation (BfN), Konstantinstr. 110, 53179, Bonn, Germany
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Ilangumaran G, Smith DL. Plant Growth Promoting Rhizobacteria in Amelioration of Salinity Stress: A Systems Biology Perspective. FRONTIERS IN PLANT SCIENCE 2017; 8:1768. [PMID: 29109733 PMCID: PMC5660262 DOI: 10.3389/fpls.2017.01768] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 09/27/2017] [Indexed: 05/18/2023]
Abstract
Salinity affects plant growth and is a major abiotic stress that limits crop productivity. It is well-understood that environmental adaptations and genetic traits regulate salinity tolerance in plants, but imparting the knowledge gained towards crop improvement remain arduous. Harnessing the potential of beneficial microorganisms present in the rhizosphere is an alternative strategy for improving plant stress tolerance. This review intends to elucidate the understanding of salinity tolerance mechanisms attributed by plant growth promoting rhizobacteria (PGPR). Recent advances in molecular studies have yielded insights into the signaling networks of plant-microbe interactions that contribute to salt tolerance. The beneficial effects of PGPR involve boosting key physiological processes, including water and nutrient uptake, photosynthesis, and source-sink relationships that promote growth and development. The regulation of osmotic balance and ion homeostasis by PGPR are conducted through modulation of phytohormone status, gene expression, protein function, and metabolite synthesis in plants. As a result, improved antioxidant activity, osmolyte accumulation, proton transport machinery, salt compartmentalization, and nutrient status reduce osmotic stress and ion toxicity. Furthermore, in addition to indole-3-acetic acid and 1-aminocyclopropane-1-carboxylic acid deaminase biosynthesis, other extracellular secretions of the rhizobacteria function as signaling molecules and elicit stress responsive pathways. Application of PGPR inoculants is a promising measure to combat salinity in agricultural fields, thereby increasing global food production.
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Affiliation(s)
| | - Donald L. Smith
- Department of Plant Science, Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, QC, Canada
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Lopes R, Cerdeira L, Tavares GS, Ruiz JC, Blom J, Horácio ECA, Mantovani HC, Queiroz MVD. Genome analysis reveals insights of the endophytic Bacillus toyonensis BAC3151 as a potentially novel agent for biocontrol of plant pathogens. World J Microbiol Biotechnol 2017; 33:185. [DOI: 10.1007/s11274-017-2347-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 09/19/2017] [Indexed: 02/02/2023]
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Adolfsson L, Nziengui H, Abreu IN, Šimura J, Beebo A, Herdean A, Aboalizadeh J, Široká J, Moritz T, Novák O, Ljung K, Schoefs B, Spetea C. Enhanced Secondary- and Hormone Metabolism in Leaves of Arbuscular Mycorrhizal Medicago truncatula. PLANT PHYSIOLOGY 2017; 175:392-411. [PMID: 28698354 PMCID: PMC5580739 DOI: 10.1104/pp.16.01509] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 07/07/2017] [Indexed: 05/20/2023]
Abstract
Arbuscular mycorrhizas (AM) are the most common symbiotic associations between a plant's root compartment and fungi. They provide nutritional benefit (mostly inorganic phosphate [Pi]), leading to improved growth, and nonnutritional benefits, including defense responses to environmental cues throughout the host plant, which, in return, delivers carbohydrates to the symbiont. However, how transcriptional and metabolic changes occurring in leaves of AM plants differ from those induced by Pi fertilization is poorly understood. We investigated systemic changes in the leaves of mycorrhized Medicago truncatula in conditions with no improved Pi status and compared them with those induced by high-Pi treatment in nonmycorrhized plants. Microarray-based genome-wide profiling indicated up-regulation by mycorrhization of genes involved in flavonoid, terpenoid, jasmonic acid (JA), and abscisic acid (ABA) biosynthesis as well as enhanced expression of MYC2, the master regulator of JA-dependent responses. Accordingly, total anthocyanins and flavonoids increased, and most flavonoid species were enriched in AM leaves. Both the AM and Pi treatments corepressed iron homeostasis genes, resulting in lower levels of available iron in leaves. In addition, higher levels of cytokinins were found in leaves of AM- and Pi-treated plants, whereas the level of ABA was increased specifically in AM leaves. Foliar treatment of nonmycorrhized plants with either ABA or JA induced the up-regulation of MYC2, but only JA also induced the up-regulation of flavonoid and terpenoid biosynthetic genes. Based on these results, we propose that mycorrhization and Pi fertilization share cytokinin-mediated improved shoot growth, whereas enhanced ABA biosynthesis and JA-regulated flavonoid and terpenoid biosynthesis in leaves are specific to mycorrhization.
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Affiliation(s)
- Lisa Adolfsson
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Hugues Nziengui
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Ilka N Abreu
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umea, Sweden
| | - Jan Šimura
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Institute of Experimental Botany of Czech Academy of Sciences and Faculty of Science of Palacký University, CZ-78371 Olomouc, Czech Republic
| | - Azeez Beebo
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Andrei Herdean
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Jila Aboalizadeh
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Jitka Široká
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Institute of Experimental Botany of Czech Academy of Sciences and Faculty of Science of Palacký University, CZ-78371 Olomouc, Czech Republic
| | - Thomas Moritz
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umea, Sweden
| | - Ondřej Novák
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Institute of Experimental Botany of Czech Academy of Sciences and Faculty of Science of Palacký University, CZ-78371 Olomouc, Czech Republic
| | - Karin Ljung
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umea, Sweden
| | - Benoît Schoefs
- Metabolism, Engineering of Microalgal Molecules and Applications, Mer Molécules Santé, University Bretagne Loire, Institut Universitaire Mer et Littoral - Fédération de Recherche 3473 Centre National de la Recherche Scientifique, University of Le Mans, 72085 Le Mans cedex 9, France
| | - Cornelia Spetea
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
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Tsai HH, Schmidt W. Mobilization of Iron by Plant-Borne Coumarins. TRENDS IN PLANT SCIENCE 2017; 22:538-548. [PMID: 28385337 DOI: 10.1016/j.tplants.2017.03.008] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 03/06/2017] [Accepted: 03/13/2017] [Indexed: 05/19/2023]
Abstract
Iron is one of the most abundant elements in soils, but its low phytoavailability at high pH restricts plant communities on alkaline soils to taxa that have evolved efficient strategies to increase iron solubility. Recent evidence provides support for a previously underestimated role of root-secreted coumarins in mobilizing iron through reduction and chelation as part of an orchestrated strategy evolved to improve the acquisition of iron from recalcitrant pools. Understanding the mechanisms that tune the production of iron-mobilizing coumarins and their intricate interplay with other biosynthesis pathways could yield clues for deciphering the molecular basis of 'iron efficiency' - the ability of plants to thrive on soils with limited iron availability - and may open avenues for generating iron-fortified crops.
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Affiliation(s)
- Huei Hsuan Tsai
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica and National Chung Hsing University, Taipei 11529, Taiwan; Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung 40227, Taiwan; Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Wolfgang Schmidt
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica and National Chung Hsing University, Taipei 11529, Taiwan; Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan; Biotechnology Center, National Chung-Hsing University, Taichung 40227, Taiwan; Genome and Systems Biology Degree Program, College of Life Science, National Taiwan University, Taipei 10617, Taiwan.
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Roy EM, Griffith KL. Characterization of a Novel Iron Acquisition Activity That Coordinates the Iron Response with Population Density under Iron-Replete Conditions in Bacillus subtilis. J Bacteriol 2017; 199:e00487-16. [PMID: 27795321 PMCID: PMC5165090 DOI: 10.1128/jb.00487-16] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/24/2016] [Indexed: 01/10/2023] Open
Abstract
Iron is an essential micronutrient required for the viability of many organisms. Under oxidizing conditions, ferric iron is highly insoluble (∼10-9 to 10-18 M), yet bacteria typically require ∼10-6 M for survival. To overcome this disparity, many bacteria have adopted the use of extracellular iron-chelating siderophores coupled with specific iron-siderophore uptake systems. In the case of Bacillus subtilis, undomesticated strains produce the siderophore bacillibactin. However, many laboratory strains, e.g., JH642, have lost the ability to produce bacillibactin during the process of domestication. In this work, we identified a novel iron acquisition activity from strain JH642 that accumulates in the growth medium and coordinates the iron response with population density. The molecule(s) responsible for this activity was named elemental Fe(II/III) (Efe) acquisition factor because efeUOB (ywbLMN) is required for its activity. Unlike most iron uptake molecules, including siderophores and iron reductases, Efe acquisition factor is present under iron-replete conditions and is regulated independently of Fur repressor. Restoring bacillibactin production in strain JH642 inhibits the activity of Efe acquisition factor, presumably by sequestering available iron. A similar iron acquisition activity is produced from a mutant of Escherichia coli unable to synthesize the siderophore enterobactin. Given the conservation of efeUOB and its regulation by catecholic siderophores in B. subtilis and E. coli, we speculate that Efe acquisition factor is utilized by many bacteria, serves as an alternative to Fur-mediated iron acquisition systems, and provides cells with biologically available iron that would normally be inaccessible during aerobic growth under iron-replete conditions. IMPORTANCE Iron is an essential micronutrient required for a variety of biological processes, yet ferric iron is highly insoluble during aerobic growth. In this work, we identified a novel iron acquisition activity that coordinates the iron response with population density in laboratory strains of Bacillus subtilis We named the molecule(s) responsible for this activity elemental Fe(II/III) (Efe) acquisition factor after the efeUOB (ywbLMN) operon required for its uptake into cells. Unlike most iron uptake systems, Efe acquisition factor is present under iron-replete conditions and is regulated independently of Fur, the master regulator of the iron response. We speculate that Efe acquisition factor is highly conserved among bacteria and serves as a backup to Fur-mediated iron acquisition systems.
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Affiliation(s)
- Emily M Roy
- Department of Microbiology, University of Massachusetts, Amherst, Massachusetts, USA
| | - Kevin L Griffith
- Department of Microbiology, University of Massachusetts, Amherst, Massachusetts, USA
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Li G, Kronzucker HJ, Shi W. The Response of the Root Apex in Plant Adaptation to Iron Heterogeneity in Soil. FRONTIERS IN PLANT SCIENCE 2016; 7:344. [PMID: 27047521 PMCID: PMC4800179 DOI: 10.3389/fpls.2016.00344] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 03/07/2016] [Indexed: 05/30/2023]
Abstract
Iron (Fe) is an essential micronutrient for plant growth and development, and is frequently limiting. By contrast, over-accumulation of Fe in plant tissues leads to toxicity. In soils, the distribution of Fe is highly heterogeneous. To cope with this heterogeneity, plant roots engage an array of adaptive responses to adjust their morphology and physiology. In this article, we review root morphological and physiological changes in response to low- and high-Fe conditions and highlight differences between these responses. We especially focus on the role of the root apex in dealing with the stresses resulting from Fe shortage and excess.
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Affiliation(s)
- Guangjie Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of SciencesNanjing, China
| | | | - Weiming Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of SciencesNanjing, China
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Campestre MP, Castagno LN, Estrella MJ, Ruiz OA. Lotus japonicus plants of the Gifu B-129 ecotype subjected to alkaline stress improve their Fe(2+) bio-availability through inoculation with Pantoea eucalypti M91. JOURNAL OF PLANT PHYSIOLOGY 2016; 192:47-55. [PMID: 26815729 DOI: 10.1016/j.jplph.2016.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 01/05/2016] [Accepted: 01/05/2016] [Indexed: 06/05/2023]
Abstract
Inoculation assays with Pantoea eucalypti M91 were performed on Lotus japonicus ecotype Gifu. Under alkaline conditions, this ecotype is characterized by the development of interveinal chlorosis of the apical leaves due to low mobilization of Fe(2+). Inoculation with P. eucalypti M91, a plant growth-promoting bacterial strain capable of producing pyoverdine-like and pyochelin-like siderophores under alkaline growth conditions, alters the root, resulting in a herringbone pattern of root branching. Additional features include improvement in Fe(2+) transport to the shoots, acidification of the hydroponic solution of the plant cultures, and an accompanying increase in the efficiency of the PSII parameters. In addition, there was an increase in the expression of the FRO1 and IRT1 genes, accompanied by a significant increase in FRO activity. Results showed that P. eucalypti M91 has a beneficial effect on the Fe acquisition machinery of Strategy I, as described for non-graminaceous monocots and dicots, suggesting its potential as an inoculant for legume crops cultivated in alkaline soils.
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Affiliation(s)
- María Paula Campestre
- Unidad de Biotecnología 1, Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús/Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional de San Martín (IIB-INTECH/CONICET-UNSAM), Avenida Intendente Marino Km 8,2 CC 164, B7130IWA Chascomús, Argentina.
| | - Luis Nazareno Castagno
- Laboratorio de Microbiología del Suelo, Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús/Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional de San Martín (IIB-INTECH/CONICET-UNSAM), Avenida Intendente Marino Km 8,2 CC 164, B7130IWA Chascomús, Argentina.
| | - María Julia Estrella
- Laboratorio de Microbiología del Suelo, Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús/Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional de San Martín (IIB-INTECH/CONICET-UNSAM), Avenida Intendente Marino Km 8,2 CC 164, B7130IWA Chascomús, Argentina.
| | - Oscar Adolfo Ruiz
- Unidad de Biotecnología 1, Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús/Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional de San Martín (IIB-INTECH/CONICET-UNSAM), Avenida Intendente Marino Km 8,2 CC 164, B7130IWA Chascomús, Argentina.
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Saha M, Sarkar S, Sarkar B, Sharma BK, Bhattacharjee S, Tribedi P. Microbial siderophores and their potential applications: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:3984-99. [PMID: 25758420 DOI: 10.1007/s11356-015-4294-0] [Citation(s) in RCA: 298] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 02/27/2015] [Indexed: 05/18/2023]
Abstract
Siderophores are small organic molecules produced by microorganisms under iron-limiting conditions which enhance the uptake of iron to the microorganisms. In environment, the ferric form of iron is insoluble and inaccessible at physiological pH (7.35-7.40). Under this condition, microorganisms synthesize siderophores which have high affinity for ferric iron. These ferric iron-siderophore complexes are then transported to cytosol. In cytosol, the ferric iron gets reduced into ferrous iron and becomes accessible to microorganism. In recent times, siderophores have drawn much attention due to its potential roles in different fields. Siderophores have application in microbial ecology to enhance the growth of several unculturable microorganisms and can alter the microbial communities. In the field of agriculture, different types of siderophores promote the growth of several plant species and increase their yield by enhancing the Fe uptake to plants. Siderophores acts as a potential biocontrol agent against harmful phyto-pathogens and holds the ability to substitute hazardous pesticides. Heavy-metal-contaminated samples can be detoxified by applying siderophores, which explicate its role in bioremediation. Siderophores can detect the iron content in different environments, exhibiting its role as a biosensor. In the medical field, siderophore uses the "Trojan horse strategy" to form complexes with antibiotics and helps in the selective delivery of antibiotics to the antibiotic-resistant bacteria. Certain iron overload diseases for example sickle cell anemia can be treated with the help of siderophores. Other medical applications of siderophores include antimalarial activity, removal of transuranic elements from the body, and anticancer activity. The aim of this review is to discuss the important roles and applications of siderophores in different sectors including ecology, agriculture, bioremediation, biosensor, and medicine.
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Affiliation(s)
- Maumita Saha
- Department of Molecular Biology & Bioinformatics, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
| | - Subhasis Sarkar
- Department of Molecular Biology & Bioinformatics, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
| | - Biplab Sarkar
- National Institute of Abiotic Stress Management, Baramati, 413115, Pune, Maharashtra, India
| | - Bipin Kumar Sharma
- Department of Microbiology, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India
| | - Surajit Bhattacharjee
- Department of Molecular Biology & Bioinformatics, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India.
| | - Prosun Tribedi
- Department of Microbiology, Tripura University (A Central University), Suryamaninagar, Tripura, 799022, India.
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Xue Y, Xia H, Christie P, Zhang Z, Li L, Tang C. Crop acquisition of phosphorus, iron and zinc from soil in cereal/legume intercropping systems: a critical review. ANNALS OF BOTANY 2016; 117:363-77. [PMID: 26749590 PMCID: PMC4765540 DOI: 10.1093/aob/mcv182] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/08/2015] [Accepted: 10/19/2015] [Indexed: 05/18/2023]
Abstract
BACKGROUND Phosphorus (P), iron (Fe) and zinc (Zn) are essential elements for plant growth and development, but their availability in soil is often limited. Intercropping contributes to increased P, Fe and Zn uptake and thereby increases yield and improves grain nutritional quality and ultimately human health. A better understanding of how intercropping leads to increased plant P, Fe and Zn availability will help to improve P-fertilizer-use efficiency and agronomic Fe and Zn biofortification. SCOPE This review synthesizes the literature on how intercropping of legumes with cereals increases acquisition of P, Fe and Zn from soil and recapitulates what is known about root-to-shoot nutrient translocation, plant-internal nutrient remobilization and allocation to grains. CONCLUSIONS Direct interspecific facilitation in intercropping involves below-ground processes in which cereals increase Fe and Zn bioavailability while companion legumes benefit. This has been demonstrated and verified using isotopic nutrient tracing and molecular analysis. The same methodological approaches and field studies should be used to explore direct interspecific P facilitation. Both niche complementarity and interspecific facilitation contribute to increased P acquisition in intercropping. Niche complementarity may also contribute to increased Fe and Zn acquisition, an aspect poorly understood. Interspecific mobilization and uptake facilitation of sparingly soluble P, Fe and Zn from soil, however, are not the only determinants of the concentrations of P, Fe and Zn in grains. Grain yield and nutrient translocation from roots to shoots further influence the concentrations of these nutrients in grains.
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Affiliation(s)
- Yanfang Xue
- National Engineering Laboratory for Wheat and Maize, Maize Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Haiyong Xia
- National Engineering Laboratory for Wheat and Maize, Maize Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Crop Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China,
| | - Peter Christie
- Ministry of Education Key Laboratory of Plant and Soil Interactions, Center for Resources, Environment and Food Security, China Agricultural University, Beijing 100193, China and
| | - Zheng Zhang
- Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Crop Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Long Li
- Ministry of Education Key Laboratory of Plant and Soil Interactions, Center for Resources, Environment and Food Security, China Agricultural University, Beijing 100193, China and
| | - Caixian Tang
- Department of Animal, Plant and Soil Sciences, Centre for AgriBiosciences, La Trobe University, Melbourne Campus, Bundoora Vic 3086, Australia
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Sisó-Terraza P, Luis-Villarroya A, Fourcroy P, Briat JF, Abadía A, Gaymard F, Abadía J, Álvarez-Fernández A. Accumulation and Secretion of Coumarinolignans and other Coumarins in Arabidopsis thaliana Roots in Response to Iron Deficiency at High pH. FRONTIERS IN PLANT SCIENCE 2016; 7:1711. [PMID: 27933069 PMCID: PMC5120119 DOI: 10.3389/fpls.2016.01711] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/31/2016] [Indexed: 05/03/2023]
Abstract
Root secretion of coumarin-phenolic type compounds has been recently shown to be related to Arabidopsis thaliana tolerance to Fe deficiency at high pH. Previous studies revealed the identity of a few simple coumarins occurring in roots and exudates of Fe-deficient A. thaliana plants, and left open the possible existence of other unknown phenolics. We used HPLC-UV/VIS/ESI-MS(TOF), HPLC/ESI-MS(ion trap) and HPLC/ESI-MS(Q-TOF) to characterize (identify and quantify) phenolic-type compounds accumulated in roots or secreted into the nutrient solution of A. thaliana plants in response to Fe deficiency. Plants grown with or without Fe and using nutrient solutions buffered at pH 5.5 or 7.5 enabled to identify an array of phenolics. These include several coumarinolignans not previously reported in A. thaliana (cleomiscosins A, B, C, and D and the 5'-hydroxycleomiscosins A and/or B), as well as some coumarin precursors (ferulic acid and coniferyl and sinapyl aldehydes), and previously reported cathecol (fraxetin) and non-cathecol coumarins (scopoletin, isofraxidin and fraxinol), some of them in hexoside forms not previously characterized. The production and secretion of phenolics were more intense when the plant accessibility to Fe was diminished and the plant Fe status deteriorated, as it occurs when plants are grown in the absence of Fe at pH 7.5. Aglycones and hexosides of the four coumarins were abundant in roots, whereas only the aglycone forms could be quantified in the nutrient solution. A comprehensive quantification of coumarins, first carried out in this study, revealed that the catechol coumarin fraxetin was predominant in exudates (but not in roots) of Fe-deficient A. thaliana plants grown at pH 7.5. Also, fraxetin was able to mobilize efficiently Fe from a Fe(III)-oxide at pH 5.5 and pH 7.5. On the other hand, non-catechol coumarins were much less efficient in mobilizing Fe and were present in much lower concentrations, making unlikely that they could play a role in Fe mobilization. The structural features of the array of coumarin type-compounds produced suggest some can mobilize Fe from the soil and others can be more efficient as allelochemicals.
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Affiliation(s)
- Patricia Sisó-Terraza
- Plant Stress Physiology Group, Department of Plant Nutrition, Aula Dei Experimental Station, Consejo Superior de Investigaciones CientíficasZaragoza, Spain
| | - Adrián Luis-Villarroya
- Plant Stress Physiology Group, Department of Plant Nutrition, Aula Dei Experimental Station, Consejo Superior de Investigaciones CientíficasZaragoza, Spain
| | - Pierre Fourcroy
- Biochimie et Physiologie Moléculaire des Plantes, Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, Université MontpellierMontpellier, France
| | - Jean-François Briat
- Biochimie et Physiologie Moléculaire des Plantes, Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, Université MontpellierMontpellier, France
| | - Anunciación Abadía
- Plant Stress Physiology Group, Department of Plant Nutrition, Aula Dei Experimental Station, Consejo Superior de Investigaciones CientíficasZaragoza, Spain
| | - Frédéric Gaymard
- Biochimie et Physiologie Moléculaire des Plantes, Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, Université MontpellierMontpellier, France
| | - Javier Abadía
- Plant Stress Physiology Group, Department of Plant Nutrition, Aula Dei Experimental Station, Consejo Superior de Investigaciones CientíficasZaragoza, Spain
| | - Ana Álvarez-Fernández
- Plant Stress Physiology Group, Department of Plant Nutrition, Aula Dei Experimental Station, Consejo Superior de Investigaciones CientíficasZaragoza, Spain
- *Correspondence: Ana Álvarez-Fernández,
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43
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Tkacz A, Poole P. Role of root microbiota in plant productivity. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:2167-75. [PMID: 25908654 PMCID: PMC4986727 DOI: 10.1093/jxb/erv157] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/09/2015] [Accepted: 03/12/2015] [Indexed: 05/19/2023]
Abstract
The growing human population requires increasing amounts of food, but modern agriculture has limited possibilities for increasing yields. New crop varieties may be bred to have increased yields and be more resistant to environmental stress and pests. However, they still require fertilization to supplement essential nutrients that are normally limited in the soil. Soil microorganisms present an opportunity to reduce the requirement for inorganic fertilization in agriculture. Microorganisms, due to their enormous genetic pool, are also a potential source of biochemical reactions that recycle essential nutrients for plant growth. Microbes that associate with plants can be considered to be part of the plant's pan-genome. Therefore, it is essential for us to understand microbial community structure and their 'metagenome' and how it is influenced by different soil types and crop varieties. In the future we may be able to modify and better utilize the soil microbiota potential for promoting plant growth.
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Affiliation(s)
- Andrzej Tkacz
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK
| | - Philip Poole
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, UK
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44
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Traxler MF, Kolter R. Natural products in soil microbe interactions and evolution. Nat Prod Rep 2015; 32:956-70. [DOI: 10.1039/c5np00013k] [Citation(s) in RCA: 137] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Gram positive bacteria from the soil have historically been a deep source of useful natural products. This article considers how natural products may mediate microbial interactions in the soil environment.
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Affiliation(s)
- Matthew F. Traxler
- Dept. of Plant and Microbial Biology
- University of California at Berkeley
- Berkeley
- USA
| | - Roberto Kolter
- Dept. of Microbiology and Immunobiology
- Harvard Medical School
- Boston
- USA
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45
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Fan SK, Fang XZ, Guan MY, Ye YQ, Lin XY, Du ST, Jin CW. Exogenous abscisic acid application decreases cadmium accumulation in Arabidopsis plants, which is associated with the inhibition of IRT1-mediated cadmium uptake. FRONTIERS IN PLANT SCIENCE 2014; 5:721. [PMID: 25566293 PMCID: PMC4267193 DOI: 10.3389/fpls.2014.00721] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Accepted: 11/30/2014] [Indexed: 05/03/2023]
Abstract
Cadmium (Cd) contamination of agricultural soils is an increasingly serious problem. Measures need to be developed to minimize Cd entering the human food chain from contaminated soils. We report here that, under Cd exposure condition, application with low doses of (0.1-0.5 μM) abscisic acid (ABA) clearly inhibited Cd uptake by roots and decreased Cd level in Arabidopsis wild-type plants (Col-0). Expression of IRT1 in roots was also strongly inhibited by ABA treatment. Decrease in Cd uptake and the inhibition of IRT1 expression were clearly lesser pronounced in an ABA-insensitive double mutant snrk2.2/2.3 than in the Col-0 in response to ABA application. The ABA-decreased Cd uptake was found to correlate with the ABA-inhibited IRT1 expression in the roots of Col-0 plants fed two different levels of iron. Furthermore, the Cd uptake of irt1 mutants was barely affected by ABA application. These results indicated that inhibition of IRT1 expression is involved in the decrease of Cd uptake in response to exogenous ABA application. Interestingly, ABA application increased the iron level in both Col-0 plants and irt1 mutants, suggesting that ABA-increased Fe acquisition does not depend on the IRT1 function, but on the contrary, the ABA-mediated inhibition of IRT1 expression may be due to the elevation of iron level in plants. From our results, we concluded that ABA application might increase iron acquisition, followed by the decrease in Cd uptake by inhibition of IRT1 activity. Thus, for crop production in Cd contaminated soils, developing techniques based on ABA application potentially is a promising approach for reducing Cd accumulation in edible organs in plants.
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Affiliation(s)
- Shi Kai Fan
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang UniversityHangzhou, China
| | - Xian Zhi Fang
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang UniversityHangzhou, China
| | - Mei Yan Guan
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang UniversityHangzhou, China
| | - Yi Quan Ye
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang UniversityHangzhou, China
| | - Xian Yong Lin
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang UniversityHangzhou, China
| | - Shao Ting Du
- College of Environmental Science and Engineering, Zhejiang Gongshang UniversityHangzhou, China
| | - Chong Wei Jin
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang UniversityHangzhou, China
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