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Redouane EM, Núñez A, Achouak W, Barakat M, Alex A, Martins JC, Tazart Z, Mugani R, Zerrifi SEA, Haida M, García AM, Campos A, Lahrouni M, Oufdou K, Vasconcelos V, Oudra B. Microcystin influence on soil-plant microbiota: Unraveling microbiota modulations and assembly processes in the rhizosphere of Vicia faba. Sci Total Environ 2024; 918:170634. [PMID: 38325456 DOI: 10.1016/j.scitotenv.2024.170634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/30/2024] [Accepted: 01/31/2024] [Indexed: 02/09/2024]
Abstract
Microcystins (MCs) are frequently detected in cyanobacterial bloom-impacted waterbodies and introduced into agroecosystems via irrigation water. They are widely known as phytotoxic cyanotoxins, which impair the growth and physiological functions of crop plants. However, their impact on the plant-associated microbiota is scarcely tackled and poorly understood. Therefore, we aimed to investigate the effect of MCs on microbiota-inhabiting bulk soil (BS), root adhering soil (RAS), and root tissue (RT) of Vicia faba when exposed to 100 μg L-1 MCs in a greenhouse pot experiment. Under MC exposure, the structure, co-occurrence network, and assembly processes of the bacterial microbiota were modulated with the greatest impact on RT-inhabiting bacteria, followed by BS and, to a lesser extent, RAS. The analyses revealed a significant decrease in the abundances of several Actinobacteriota-related taxa within the RT microbiota, including the most abundant and known genus of Streptomyces. Furthermore, MCs significantly increased the abundance of methylotrophic bacteria (Methylobacillus, Methylotenera) and other Proteobacteria-affiliated genera (e.g., Paucibacter), which are supposed to degrade MCs. The co-occurrence network of the bacterial community in the presence of MCs was less complex than the control network. In MC-exposed RT, the turnover in community composition was more strongly driven by deterministic processes, as proven by the beta-nearest taxon index. Whereas in MC-treated BS and RAS, both deterministic and stochastic processes can influence community assembly to some extent, with a relative dominance of deterministic processes. Altogether, these results suggest that MCs may reshape the structure of the microbiota in the soil-plant system by reducing bacterial taxa with potential phytobeneficial traits and increasing other taxa with the potential capacity to degrade MCs.
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Affiliation(s)
- El Mahdi Redouane
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Matosinhos 4450-208, Portugal
| | - Andrés Núñez
- Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid (ETSII-UPM), Madrid 28006, Spain; Departamento de Genética y Microbiología, Facultad de Biología, Universidad de Murcia, Campus de Espinardo, Murcia 30100, Spain
| | - Wafa Achouak
- Aix Marseille University, CEA, CNRS, BIAM, Lab of Microbial Ecology of the Rhizosphere, (LEMiRE), Saint Paul Lez Durance 13115, France.
| | - Mohamed Barakat
- Aix Marseille University, CEA, CNRS, BIAM, Lab of Microbial Ecology of the Rhizosphere, (LEMiRE), Saint Paul Lez Durance 13115, France
| | - Anoop Alex
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Matosinhos 4450-208, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
| | - José Carlos Martins
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Matosinhos 4450-208, Portugal
| | - Zakaria Tazart
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco; AgroBioSciences, Plant Stress Physiology Laboratory, Mohammed VI Polytechnic University, Benguerir 43150, Morocco
| | - Richard Mugani
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco
| | - Soukaina El Amrani Zerrifi
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco; Higher Institute of Nurses Professions and Health Techniques of Guelmim, Guelmim 81000, Morocco
| | - Mohammed Haida
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco
| | - Ana M García
- Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid (ETSII-UPM), Madrid 28006, Spain
| | - Alexandre Campos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Matosinhos 4450-208, Portugal
| | - Majida Lahrouni
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco
| | - Vitor Vasconcelos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Matosinhos 4450-208, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
| | - Brahim Oudra
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech 40000, Morocco
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Slimani A, Ait-El-Mokhtar M, Ben-Laouane R, Boutasknit A, Anli M, Abouraicha EF, Oufdou K, Meddich A, Baslam M. Signals and Machinery for Mycorrhizae and Cereal and Oilseed Interactions towards Improved Tolerance to Environmental Stresses. Plants (Basel) 2024; 13:826. [PMID: 38592805 PMCID: PMC10975020 DOI: 10.3390/plants13060826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/04/2024] [Accepted: 03/12/2024] [Indexed: 04/11/2024]
Abstract
In the quest for sustainable agricultural practices, there arises an urgent need for alternative solutions to mineral fertilizers and pesticides, aiming to diminish the environmental footprint of farming. Arbuscular mycorrhizal fungi (AMF) emerge as a promising avenue, bestowing plants with heightened nutrient absorption capabilities while alleviating plant stress. Cereal and oilseed crops benefit from this association in a number of ways, including improved growth fitness, nutrient uptake, and tolerance to environmental stresses. Understanding the molecular mechanisms shaping the impact of AMF on these crops offers encouraging prospects for a more efficient use of these beneficial microorganisms to mitigate climate change-related stressors on plant functioning and productivity. An increased number of studies highlighted the boosting effect of AMF on grain and oil crops' tolerance to (a)biotic stresses while limited ones investigated the molecular aspects orchestrating the different involved mechanisms. This review gives an extensive overview of the different strategies initiated by mycorrhizal cereal and oilseed plants to manage the deleterious effects of environmental stress. We also discuss the molecular drivers and mechanistic concepts to unveil the molecular machinery triggered by AMF to alleviate the tolerance of these crops to stressors.
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Affiliation(s)
- Aiman Slimani
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment, Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
| | - Mohamed Ait-El-Mokhtar
- Laboratory of Biochemistry, Environment & Agri-Food URAC 36, Department of Biology, Faculty of Science and Techniques—Mohammedia, Hassan II University, Mohammedia 28800, Morocco
| | - Raja Ben-Laouane
- Laboratory of Environment and Health, Department of Biology, Faculty of Science and Techniques, Errachidia 52000, Morocco
| | - Abderrahim Boutasknit
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- Multidisciplinary Faculty of Nador, Mohammed First University, Nador 62700, Morocco
| | - Mohamed Anli
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- Department of Life, Earth and Environmental Sciences, University of Comoros, Patsy University Center, Moroni 269, Comoros
| | - El Faiza Abouraicha
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- Higher Institute of Nursing and Health Techniques (ISPITS), Essaouira 44000, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment, Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- AgroBiosciences Program, College of Agriculture and Environmental Sciences, University Mohammed VI Polytechnic (UM6P), Ben Guerir 43150, Morocco
| | - Abdelilah Meddich
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
| | - Marouane Baslam
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- GrowSmart, Seoul 03129, Republic of Korea
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Slimani A, Ait-El-Mokhtar M, Ben-Laouane R, Boutasknit A, Anli M, Abouraicha EF, Oufdou K, Meddich A, Baslam M. Molecular and Systems Biology Approaches for Harnessing the Symbiotic Interaction in Mycorrhizal Symbiosis for Grain and Oil Crop Cultivation. Int J Mol Sci 2024; 25:912. [PMID: 38255984 PMCID: PMC10815302 DOI: 10.3390/ijms25020912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/09/2024] [Accepted: 01/09/2024] [Indexed: 01/24/2024] Open
Abstract
Mycorrhizal symbiosis, the mutually beneficial association between plants and fungi, has gained significant attention in recent years due to its widespread significance in agricultural productivity. Specifically, arbuscular mycorrhizal fungi (AMF) provide a range of benefits to grain and oil crops, including improved nutrient uptake, growth, and resistance to (a)biotic stressors. Harnessing this symbiotic interaction using molecular and systems biology approaches presents promising opportunities for sustainable and economically-viable agricultural practices. Research in this area aims to identify and manipulate specific genes and pathways involved in the symbiotic interaction, leading to improved cereal and oilseed crop yields and nutrient acquisition. This review provides an overview of the research frontier on utilizing molecular and systems biology approaches for harnessing the symbiotic interaction in mycorrhizal symbiosis for grain and oil crop cultivation. Moreover, we address the mechanistic insights and molecular determinants underpinning this exchange. We conclude with an overview of current efforts to harness mycorrhizal diversity to improve cereal and oilseed health through systems biology.
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Affiliation(s)
- Aiman Slimani
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment, Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
| | - Mohamed Ait-El-Mokhtar
- Laboratory Biochemistry, Environment & Agri-Food URAC 36, Department of Biology, Faculty of Science and Techniques—Mohammedia, Hassan II University of Casablanca, Mohammedia 28800, Morocco
| | - Raja Ben-Laouane
- Laboratory of Environment and Health, Department of Biology, Faculty of Science and Techniques, Errachidia 52000, Morocco
| | - Abderrahim Boutasknit
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- Department of Biology, Multidisciplinary Faculty of Nador, Mohamed First University, Nador 62700, Morocco
| | - Mohamed Anli
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- Department of Life, Earth and Environmental Sciences, University of Comoros, Patsy University Center, Moroni 269, Comoros
| | - El Faiza Abouraicha
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- Higher Institute of Nursing and Health Techniques (ISPITS), Essaouira 44000, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment, Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
| | - Abdelilah Meddich
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
| | - Marouane Baslam
- Centre d’Agrobiotechnologie et Bioingénierie, Unité de Recherche Labellisée CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, Marrakesh 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
- GrowSmart, Seoul 03129, Republic of Korea
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Redouane EM, Tazart Z, Lahrouni M, Mugani R, Elgadi S, Zine H, Zerrifi SEA, Haida M, Martins JC, Campos A, Oufdou K, Vasconcelos V, Oudra B. Health risk assessment of lake water contaminated with microcystins for fruit crop irrigation and farm animal drinking. Environ Sci Pollut Res Int 2023; 30:80234-80244. [PMID: 37294489 PMCID: PMC10344998 DOI: 10.1007/s11356-023-27914-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 05/21/2023] [Indexed: 06/10/2023]
Abstract
The health risks linked to the consumption of microcystin-accumulating crops have been increasing worldwide in toxic cyanobloom-occurring regions. The bioaccumulation of microcystins (MCs) in agricultural produce at environmentally realistic concentrations is poorly investigated. In this field study, we assessed the health risks of MCs in raw water used for irrigating fruit crops (bioaccumulation) and watering farm animals in the Lalla Takerkoust agricultural region (Marrakesh, Morocco). Thus, MCs were extracted from water and fruit samples and quantified by enzyme-linked immunosorbent assay in order to calculate the health risk indicators. MCs posed a high health-risk level to poultry and horses, with estimated daily intakes (EDI) being 14- and 19-fold higher than the recommended limits (3.1 and 2.3 μg MC-LR L-1), respectively. Furthermore, pomegranate posed the same level of risk, with EDI being 22- and 53-fold higher than the limit dose (0.04 μg MC-LR kg-1) for adults and children, respectively. There was an urgent need for guidelines regarding water use and management in MC-polluted areas, besides the setup of nature-based tools for toxin removal from raw water used in farming practices. Moreover, MCs could contaminate the human food chain, which implies further investigations of their potential accumulation in livestock- and poultry-based food.
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Affiliation(s)
- El Mahdi Redouane
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, 40000, Marrakech, Morocco
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Zakaria Tazart
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, 40000, Marrakech, Morocco
| | - Majida Lahrouni
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, 40000, Marrakech, Morocco
| | - Richard Mugani
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, 40000, Marrakech, Morocco
| | - Sara Elgadi
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, 40000, Marrakech, Morocco
- Laboratory of Agro. Food Technology and Quality, Regional Center for Agronomic Research of Marrakech, National Institute of Agronomic Research (INRA), 40000, Marrakech, Morocco
| | - Hamza Zine
- Geology and Sustainable Mining Institute (GSMI), Mohammad VI Polytechnic University, 43150, Ben Guerir, Morocco
| | - Soukaina El Amrani Zerrifi
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, 40000, Marrakech, Morocco
- Higher Institute of Nurses Professions and Health Techniques of Guelmim, 81000, Guelmim, Morocco
| | - Mohammed Haida
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, 40000, Marrakech, Morocco
| | - José Carlos Martins
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Alexandre Campos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, 40000, Marrakech, Morocco
| | - Vitor Vasconcelos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, 4169-007, Porto, Portugal.
| | - Brahim Oudra
- Water, Biodiversity and Climate Change Laboratory, Faculty of Sciences Semlalia, Cadi Ayyad University, 40000, Marrakech, Morocco
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Oufdou K, Raklami A, Pajuelo E, Bargaz A, Khan MS, Bousserrhine N, Carrasco López JA. Editorial: Rhizospheric microbiota-plant interactions: A bioremediation strategy for inorganic pollutants. Front Microbiol 2023; 14:1174634. [PMID: 37032896 PMCID: PMC10073683 DOI: 10.3389/fmicb.2023.1174634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 03/06/2023] [Indexed: 04/11/2023] Open
Affiliation(s)
- Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, University Cadi Ayyad, Marrakech, Morocco
- Agrobiosciences Program, College for Sustainable Agriculture and Environmental Sciences, University Mohammed VI Polytechnic (UM6P), Ben Guerir, Morocco
- *Correspondence: Khalid Oufdou
| | - Anas Raklami
- Agrobiosciences Program, College for Sustainable Agriculture and Environmental Sciences, University Mohammed VI Polytechnic (UM6P), Ben Guerir, Morocco
| | - Eloísa Pajuelo
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Seville, Seville, Spain
| | - Adnane Bargaz
- Agrobiosciences Program, College for Sustainable Agriculture and Environmental Sciences, University Mohammed VI Polytechnic (UM6P), Ben Guerir, Morocco
| | - Mohammad Saghir Khan
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University Aligarh, Aligarh, Uttar Pradesh, India
| | | | - José A. Carrasco López
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Seville, Seville, Spain
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Raklami A, Meddich A, Pajuelo E, Marschner B, Heinze S, Oufdou K. Combined application of marble waste and beneficial microorganisms: toward a cost-effective approach for restoration of heavy metals contaminated sites. Environ Sci Pollut Res Int 2022; 29:45683-45697. [PMID: 35147874 DOI: 10.1007/s11356-022-19149-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 02/06/2022] [Indexed: 06/14/2023]
Abstract
Heavy metal (HM) pollution and the need to preserve the environment have gathered increasing scientific attention. The immobilization of HMs into less-soluble, less mobile, and less toxic forms in addition to the improvement of Medicago sativa L. growth and HMs accumulation were evaluated after the application of marble waste (MW) and/or beneficial PGP rhizobacteria and mycorrhizae to the mining soil compost. A greenhouse assay was conducted to elucidate the influence of both amendment and beneficial microorganisms. The application of marble waste to the soil-compost resulted in decreasing the bioavailability of metals (Cu, Zn, Pb, and Cd), thus ameliorating the installation of the vegetal cover for 6 months of culture. Cultivation of M. sativa under 5% MW-amended soil for 6 months increased the shoot dry weight by almost twofold, while the inoculation with rhizobacteria-mycorrhizae combined with the application of 15% MW resulted in an improvement of 3.5-fold in case of shoot dry weight. In addition, the application of marble waste amendment or their combination with metallo-resistant bacteria resulted in decreasing HM accumulation leading to HM content below the threshold recommended for animal grazing. Thus, the application of amendments and beneficial microorganisms appeared to guarantee the safe cultivation of alfalfa for 6 months of culture. The dual combination amendments and beneficial microorganisms showed the good potential to restore HM polluted soils and could stand as a novel approach for restoration of HM-contaminated soils.
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Affiliation(s)
- Anas Raklami
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco.
- Laboratory of Agri-Food, Biotechnologies, and Valorization of Plant Bioresources (Agrobioval), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco.
| | - Abdelilah Meddich
- Laboratory of Agri-Food, Biotechnologies, and Valorization of Plant Bioresources (Agrobioval), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
- Center of Agrobiotechnology and Bioengineering, Research Unit Labelled CNRST (Centre AgroBiotech-URL-CNRST-05), Cadi Ayyad University, 40000, Marrakech, Morocco
| | - Eloisa Pajuelo
- Department of Microbiology and Parasitology, University of Seville, PO Box 1095, 41080, Sevilla, Spain
| | - Bernd Marschner
- Soil Science/Soil Ecology, Geographicals Institute, Fakultät für Geowissenschaften, Ruhr-University Bochum, Universitaetsstr. 150, 44780, Bochum, Germany
| | - Stefanie Heinze
- Soil Science/Soil Ecology, Geographicals Institute, Fakultät für Geowissenschaften, Ruhr-University Bochum, Universitaetsstr. 150, 44780, Bochum, Germany
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
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Raklami A, Meddich A, Oufdou K, Baslam M. Plants-Microorganisms-Based Bioremediation for Heavy Metal Cleanup: Recent Developments, Phytoremediation Techniques, Regulation Mechanisms, and Molecular Responses. Int J Mol Sci 2022; 23:5031. [PMID: 35563429 PMCID: PMC9105715 DOI: 10.3390/ijms23095031] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/25/2022] [Accepted: 04/28/2022] [Indexed: 02/01/2023] Open
Abstract
Rapid industrialization, mine tailings runoff, and agricultural activities are often detrimental to soil health and can distribute hazardous metal(loid)s into the soil environment, with harmful effects on human and ecosystem health. Plants and their associated microbes can be deployed to clean up and prevent environmental pollution. This green technology has emerged as one of the most attractive and acceptable practices for using natural processes to break down organic contaminants or accumulate and stabilize metal pollutants by acting as filters or traps. This review explores the interactions between plants, their associated microbiomes, and the environment, and discusses how they shape the assembly of plant-associated microbial communities and modulate metal(loid)s remediation. Here, we also overview microbe-heavy-metal(loid)s interactions and discuss microbial bioremediation and plants with advanced phytoremediation properties approaches that have been successfully used, as well as their associated biological processes. We conclude by providing insights into the underlying remediation strategies' mechanisms, key challenges, and future directions for the remediation of metal(loid)s-polluted agricultural soils with environmentally friendly techniques.
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Affiliation(s)
- Anas Raklami
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment, Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco; (A.R.); (K.O.)
| | - Abdelilah Meddich
- Center of Agrobiotechnology and Bioengineering, Research Unit Labelled CNRST (Centre Agro-Biotech URL-CNRST-05), “Physiology of Abiotic Stresses” Team, Cadi Ayyad University, Marrakesh 40000, Morocco;
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Faculty of Science Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment, Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh 40000, Morocco; (A.R.); (K.O.)
| | - Marouane Baslam
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan
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Bechtaoui N, Rabiu MK, Raklami A, Oufdou K, Hafidi M, Jemo M. Phosphate-Dependent Regulation of Growth and Stresses Management in Plants. Front Plant Sci 2021; 12:679916. [PMID: 34777404 PMCID: PMC8581177 DOI: 10.3389/fpls.2021.679916] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 09/28/2021] [Indexed: 05/22/2023]
Abstract
The importance of phosphorus in the regulation of plant growth function is well studied. However, the role of the inorganic phosphate (Pi) molecule in the mitigation of abiotic stresses such as drought, salinity, heavy metal, heat, and acid stresses are poorly understood. We revisited peer-reviewed articles on plant growth characteristics that are phosphorus (P)-dependently regulated under the sufficient-P and low/no-P starvation alone or either combined with one of the mentioned stress. We found that the photosynthesis rate and stomatal conductance decreased under Pi-starved conditions. The total chlorophyll contents were increased in the P-deficient plants, owing to the lack of Pi molecules to sustain the photosynthesis functioning, particularly, the Rubisco and fructose-1,6-bisphosphatase function. The dry biomass of shoots, roots, and P concentrations were significantly reduced under Pi starvation with marketable effects in the cereal than in the legumes. To mitigate P stress, plants activate alternative regulatory pathways, the Pi-dependent glycolysis, and mitochondrial respiration in the cytoplasm. Plants grown under well-Pi supplementation of drought stress exhibited higher dry biomass of shoots than the no-P treated ones. The Pi supply to plants grown under heavy metals stress reduced the metal concentrations in the leaves for the cadmium (Cd) and lead (Pb), but could not prevent them from absorbing heavy metals from soils. To detoxify from heavy metal stress, plants enhance the catalase and ascorbate peroxidase activity that prevents lipid peroxidation in the leaves. The HvPIP and PHO1 genes were over-expressed under both Pi starvation alone and Pi plus drought, or Pi plus salinity stress combination, implying their key roles to mediate the stress mitigations. Agronomy Pi-based interventions to increase Pi at the on-farm levels were discussed. Revisiting the roles of P in growth and its better management in agricultural lands or where P is supplemented as fertilizer could help the plants to survive under abiotic stresses.
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Affiliation(s)
- Noura Bechtaoui
- AgroBiosciences Program, University Mohammed VI Polytechnic (UM6P), Benguerir, Morocco
| | - Muhammad Kabir Rabiu
- AgroBiosciences Program, University Mohammed VI Polytechnic (UM6P), Benguerir, Morocco
- Centre for Dryland Agriculture, Bayero University, Kano, Nigeria
| | - Anas Raklami
- Laboratory of Microbial Biotechnology, Agrosciences, and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Khalid Oufdou
- AgroBiosciences Program, University Mohammed VI Polytechnic (UM6P), Benguerir, Morocco
- Laboratory of Microbial Biotechnology, Agrosciences, and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Mohamed Hafidi
- AgroBiosciences Program, University Mohammed VI Polytechnic (UM6P), Benguerir, Morocco
- Laboratory of Microbial Biotechnology, Agrosciences, and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Martin Jemo
- AgroBiosciences Program, University Mohammed VI Polytechnic (UM6P), Benguerir, Morocco
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El Alaoui A, Raklami A, Bechtaoui N, El Gharmali A, Ouhammou A, Imziln B, Achouak W, Pajuelo E, Oufdou K. Use of native plants and their associated bacteria rhizobiomes to remediate-restore Draa Sfar and Kettara mining sites, Morocco. Environ Monit Assess 2021; 193:232. [PMID: 33772660 DOI: 10.1007/s10661-021-08977-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
Soil and mine tailings are unreceptive to plant growth representing an imminent threat to the environment and resource sustainability. Using indigenous plants and their associated rhizobacteria to restore mining sites would be an eco-friendly solution to mitigate soil-metal toxicity. Soil prospection from Draa Sfar and Kettara mining sites in Morocco was carried out during different seasons for native plant sampling and rhizobacteria screening. The sites have been colonized by fifteen tolerant plant species having different capacities to accumulate Cu, Zn, and P in their shoots/root systems. In Draa Sfar mine, Suaeda vera J.F. Gmel., Sarcocornia fruticosa (L.) A.J. Scott., and Frankenia corymbosa Desf. accumulated mainly Cu (more than 90 mg kg-1), Atriplex halimus L. accumulated Zn (mg kg-1), and Frankenia corymbosa Desf. accumulated Pb (14 mg kg-1). As for Kettara mine, Aizoon canariense L. mainly accumulated Zn (270 mg kg-1), whereas Forsskalea tenacissima L. was the best shoot Cu accumulator with up to 50 mg kg-1, whereas Cu accumulation in roots was 21 mg kg-1. The bacterial screening revealed the strains' abilities to tolerate heavy metals up to 50 mg kg-1 Cu, 250 mg kg-1 Pb, and 150 mg kg-1 Zn. Isolated strains belonged mainly to Bacillaceae (73.33%) and Pseudomonadaceae (10%) and expressed different plant growth-promoting traits, alongside their antifungal activity. Results from this study will provide an insight into the ability of native plants and their associated rhizobacteria to serve as a basis for remediation-restoration strategies.
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Affiliation(s)
- Abdelkhalek El Alaoui
- Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
- LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, Aix-Marseille University, CEA, CNRS, UMR7265, F-13108, Saint Paul Lez Durance, France
| | - Anas Raklami
- Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco.
| | - Noura Bechtaoui
- Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Abdelhay El Gharmali
- Laboratory of Water, Biodiversity and Global Change, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Ahmed Ouhammou
- Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Boujamaa Imziln
- Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Wafa Achouak
- LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, Aix-Marseille University, CEA, CNRS, UMR7265, F-13108, Saint Paul Lez Durance, France
| | - Eloisa Pajuelo
- Department of Microbiology and Parasitology, University of Seville, PO Box 1095, 41080, Seville, Spain
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
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Redouane EM, Lahrouni M, Martins JC, El Amrani Zerrifi S, Benidire L, Douma M, Aziz F, Oufdou K, Mandi L, Campos A, Vasconcelos V, Oudra B. Protective Role of Native Rhizospheric Soil Microbiota Against the Exposure to Microcystins Introduced into Soil-Plant System via Contaminated Irrigation Water and Health Risk Assessment. Toxins (Basel) 2021; 13:toxins13020118. [PMID: 33562776 PMCID: PMC7914557 DOI: 10.3390/toxins13020118] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 01/30/2021] [Accepted: 02/02/2021] [Indexed: 01/21/2023] Open
Abstract
Microcystins (MCs) produced in eutrophic waters may decrease crop yield, enter food chains and threaten human and animal health. The main objective of this research was to highlight the role of rhizospheric soil microbiota to protect faba bean plants from MCs toxicity after chronic exposure. Faba bean seedlings were grown in pots containing agricultural soil, during 1 month under natural environmental conditions of Marrakech city in Morocco (March–April 2018) and exposed to cyanobacterial extracts containing up to 2.5 mg·L−1 of total MCs. Three independent exposure experiments were performed (a) agricultural soil was maintained intact “exposure experiment 1”; (b) agricultural soil was sterilized “exposure experiment 2”; (c) agricultural soil was sterilized and inoculated with the rhizobia strain Rhizobium leguminosarum RhOF34 “exposure experiment 3”. Overall, data showed evidence of an increased sensitivity of faba bean plants, grown in sterilized soil, to MCs in comparison to those grown in intact and inoculated soils. The study revealed the growth inhibition of plant shoots in both exposure experiments 2 and 3 when treated with 2.5 mg·L−1 of MCs. The results also showed that the estimated daily intake (EDI) of MCs, in sterilized soil, exceeded 2.18 and 1.16 times the reference concentrations (0.04 and 0.45 µg of microcysin-leucine arginine (MC-LR). Kg−1 DW) established for humans and cattle respectively, which raises concerns about human food chain contamination.
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Affiliation(s)
- El Mahdi Redouane
- Water, Biodiversity and Climate change Laboratory, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, Marrakech 40000, Morocco; (E.M.R.); (S.E.A.Z.); (F.A.); (L.M.); (B.O.)
| | - Majida Lahrouni
- Bioactives, Health and Environement Laboratory, Biology, Environement & Health Research Unit, Department of Biology, Faculty of Sciences and technology, Moulay Ismail University, B.P. 509 Boutalamine, Errachidia 52000, Morocco;
| | - José Carlos Martins
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de MatosMatosinhos, 4450-208 Matosinhos, Portugal; (J.C.M.); (A.C.)
| | - Soukaina El Amrani Zerrifi
- Water, Biodiversity and Climate change Laboratory, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, Marrakech 40000, Morocco; (E.M.R.); (S.E.A.Z.); (F.A.); (L.M.); (B.O.)
| | - Loubna Benidire
- Plant Biotechnology Laboratory BiotecV, Laayoune Higher School of Technology, Ibn Zohr University, 25 Mars P.B. 3007, Laayoune 70000, Morocco;
| | - Mountassir Douma
- Laboratory of Chemistry, Modeling and Evironmental Sciences, Polydisciplinary Faculty of Khouribga (F.P.K), Sultan Moulay Slimane University, P.B. 145, Khouribga 25000, Morocco;
| | - Faissal Aziz
- Water, Biodiversity and Climate change Laboratory, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, Marrakech 40000, Morocco; (E.M.R.); (S.E.A.Z.); (F.A.); (L.M.); (B.O.)
- National Center for Studies and Research on Water and Energy (CNEREE), Cadi Ayyad University, B.P. 511, Av. Abdelkrim Elkhattabi, Marrakech 40000, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE) Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, Marrakech 40000, Morocco;
| | - Laila Mandi
- Water, Biodiversity and Climate change Laboratory, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, Marrakech 40000, Morocco; (E.M.R.); (S.E.A.Z.); (F.A.); (L.M.); (B.O.)
- National Center for Studies and Research on Water and Energy (CNEREE), Cadi Ayyad University, B.P. 511, Av. Abdelkrim Elkhattabi, Marrakech 40000, Morocco
| | - Alexandre Campos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de MatosMatosinhos, 4450-208 Matosinhos, Portugal; (J.C.M.); (A.C.)
| | - Vitor Vasconcelos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de MatosMatosinhos, 4450-208 Matosinhos, Portugal; (J.C.M.); (A.C.)
- Departament of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
- Correspondence: ; Tel.: +351-223401817
| | - Brahim Oudra
- Water, Biodiversity and Climate change Laboratory, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Av. Prince My Abdellah, P.O. Box 2390, Marrakech 40000, Morocco; (E.M.R.); (S.E.A.Z.); (F.A.); (L.M.); (B.O.)
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Raklami A, Tahiri AI, Bechtaoui N, Abdelhay EG, Pajuelo E, Baslam M, Meddich A, Oufdou K. Restoring the plant productivity of heavy metal-contaminated soil using phosphate sludge, marble waste, and beneficial microorganisms. J Environ Sci (China) 2021; 99:210-221. [PMID: 33183699 DOI: 10.1016/j.jes.2020.06.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 06/29/2020] [Accepted: 06/29/2020] [Indexed: 06/11/2023]
Abstract
Assisted natural remediation (ANR) has been highlighted as a promising, less expensive, and environmentally friendly solution to remediate soil contaminated with heavy metals. We tested the effects of three amendments (10% compost, C; 5 or 15% phosphate sludge, PS5 and PS15; and 5 or 15% marble waste, MW5 and MW15) in combination with microorganism inoculation (rhizobacteria consortium alone, mycorrhizae alone, and the two in-combination) on alfalfa in contaminated soil. Plant concentrations of Zn, Cu, and Pb were measured, along with proline and malondialdehyde production. The microbiological and physicochemical properties of the mining soil were evaluated. Application of the amendments allowed germination and promoted growth. Inoculation with the rhizobacteria consortium and/or mycorrhizae stimulated plant growth. PS and MW stimulated the production of proline. Inoculation of alfalfa with the rhizobacteria-mycorrhizae mixture and the application of MW allowed the safe cultivation of the legume, as shown by the low concentrations of metals in plant shoots. Zn and Pb concentrations were below the limits recommended for animal grazing and accumulated essentially in roots. Soil analyses showed the positive effect of the amendments on the soil physicochemical properties. All treatments increased soil pH (around 7), total organic carbon, and assimilable phosphorus content. Notably, an important decrease in soluble heavy metals concentrations was observed. Overall, our findings revealed that the applied treatments reduced the risk of metal-polluted soils limiting plant growth. The ANR has great potential for success in the restoration of polymetallic and acidic mining soils using the interaction between alfalfa, microorganisms, and organo-mineral amendments.
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Affiliation(s)
- Anas Raklami
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco; Laboratory of Agri-Food, Biotechnologies, and Valorization of Plant Bioresources (Agrobioval), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Abdel-Ilah Tahiri
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco; Laboratory of Agri-Food, Biotechnologies, and Valorization of Plant Bioresources (Agrobioval), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Noura Bechtaoui
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - El Gharmali Abdelhay
- Laboratory of Water, Biodiversity and Global Change, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Eloisa Pajuelo
- Department of Microbiology and Parasitology, University of Seville, 41080 Seville, Spain
| | - Marouane Baslam
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan; Department of Life and Food Sciences, Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan.
| | - Abdelilah Meddich
- Laboratory of Agri-Food, Biotechnologies, and Valorization of Plant Bioresources (Agrobioval), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
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12
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Ben-Laouane R, Baslam M, Ait-El-Mokhtar M, Anli M, Boutasknit A, Ait-Rahou Y, Toubali S, Mitsui T, Oufdou K, Wahbi S, Meddich A. Potential of Native Arbuscular Mycorrhizal Fungi, Rhizobia, and/or Green Compost as Alfalfa ( Medicago sativa) Enhancers under Salinity. Microorganisms 2020; 8:E1695. [PMID: 33143245 PMCID: PMC7693256 DOI: 10.3390/microorganisms8111695] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 01/22/2023] Open
Abstract
Salinity is one of the devastating abiotic stresses that cause reductions in agricultural production. The increased salinization affects alfalfa growth, metabolism, and rhizobium capacity for symbiotic N2 fixation negatively. This study was undertaken to investigate the efficiency of green compost (C; made from green waste), arbuscular mycorrhizal fungi (M; field-sourced native consortium), and/or rhizobium (R; a salt-tolerant rhizobium strain) individually or in combination as an effective strategy to improve alfalfa productivity under non-saline and high-saline (120 mM NaCl) conditions. In addition, we aimed to understand the agro-physiological and metabolic basis as well as glomalin content in the soil of biofertilizers-induced salt tolerance in alfalfa. Here, we show that mycorrhizal infection was enhanced after MR inoculation, while C application decreased it significantly. Salinity reduced growth, physiological functioning, and protein concentration, but the antioxidant system has been activated. Application of the selected biofertilizers, especially C alone or combined with M and/or R improved alfalfa tolerance. The tri-combination CMR mitigated the negative effects of high salinity by stimulating plant growth, roots and nodules dry matters, mineral uptake (P, N, and K), antioxidant system, synthesis of compatible solutes, and soil glomalin content, sustaining photosynthesis-related performance and decreasing Na+ and Cl- accumulation, lipid peroxidation, H2O2 content, and electrolyte leakage.
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Affiliation(s)
- Raja Ben-Laouane
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Department of Biology, Faculty of Science–Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakesh, Morocco; (R.B.-L.); (M.A.-E.-M.); (M.A.); (A.B.); (Y.A.-R.); (S.T.); (S.W.)
| | - Marouane Baslam
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan;
| | - Mohamed Ait-El-Mokhtar
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Department of Biology, Faculty of Science–Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakesh, Morocco; (R.B.-L.); (M.A.-E.-M.); (M.A.); (A.B.); (Y.A.-R.); (S.T.); (S.W.)
| | - Mohamed Anli
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Department of Biology, Faculty of Science–Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakesh, Morocco; (R.B.-L.); (M.A.-E.-M.); (M.A.); (A.B.); (Y.A.-R.); (S.T.); (S.W.)
| | - Abderrahim Boutasknit
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Department of Biology, Faculty of Science–Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakesh, Morocco; (R.B.-L.); (M.A.-E.-M.); (M.A.); (A.B.); (Y.A.-R.); (S.T.); (S.W.)
| | - Youssef Ait-Rahou
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Department of Biology, Faculty of Science–Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakesh, Morocco; (R.B.-L.); (M.A.-E.-M.); (M.A.); (A.B.); (Y.A.-R.); (S.T.); (S.W.)
| | - Salma Toubali
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Department of Biology, Faculty of Science–Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakesh, Morocco; (R.B.-L.); (M.A.-E.-M.); (M.A.); (A.B.); (Y.A.-R.); (S.T.); (S.W.)
| | - Toshiaki Mitsui
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan;
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment, Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakesh, Morocco;
| | - Said Wahbi
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Department of Biology, Faculty of Science–Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakesh, Morocco; (R.B.-L.); (M.A.-E.-M.); (M.A.); (A.B.); (Y.A.-R.); (S.T.); (S.W.)
| | - Abdelilah Meddich
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Department of Biology, Faculty of Science–Semlalia, Cadi Ayyad University, BP 2390, 40000 Marrakesh, Morocco; (R.B.-L.); (M.A.-E.-M.); (M.A.); (A.B.); (Y.A.-R.); (S.T.); (S.W.)
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Anli M, Baslam M, Tahiri A, Raklami A, Symanczik S, Boutasknit A, Ait-El-Mokhtar M, Ben-Laouane R, Toubali S, Ait Rahou Y, Ait Chitt M, Oufdou K, Mitsui T, Hafidi M, Meddich A. Biofertilizers as Strategies to Improve Photosynthetic Apparatus, Growth, and Drought Stress Tolerance in the Date Palm. Front Plant Sci 2020; 11:516818. [PMID: 33193464 PMCID: PMC7649861 DOI: 10.3389/fpls.2020.516818] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 09/22/2020] [Indexed: 05/24/2023]
Abstract
Rainfall regimes are expected to shift on a regional scale as the water cycle intensifies in a warmer climate, resulting in greater extremes in dry versus wet conditions. Such changes are having a strong impact on the agro-physiological functioning of plants that scale up to influence interactions between plants and microorganisms and hence ecosystems. In (semi)-arid ecosystems, the date palm (Phoenix dactylifera L.) -an irreplaceable tree- plays important socio-economic roles. In the current study, we implemeted an adapted management program to improve date palm development and its tolerance to water deficit by using single or multiple combinations of exotic and native arbuscular mycorrhizal fungi (AMF1 and AMF2 respectively), and/or selected consortia of plant growth-promoting rhizobacteria (PGPR: B1 and B2), and/or composts from grasses and green waste (C1 and C2, respectively). We analyzed the potential for physiological functioning (photosynthesis, water status, osmolytes, mineral nutrition) to evolve in response to drought since this will be a key indicator of plant resilience in future environments. As result, under water deficit, the selected biofertilizers enhanced plant growth, leaf water potential, and electrical conductivity parameters. Further, the dual-inoculation of AMF/PGPR amended with composts alone or in combination boosted the biomass under water deficit conditions to a greater extent than in non-inoculated and/or non-amended plants. Both single and dual biofertilizers improved physiological parameters by elevating stomatal conductance, photosynthetic pigments (chlorophyll and carotenoids content), and photosynthetic efficiency. The dual inoculation and compost significantly enhanced, especially under drought stress, the concentrations of sugar and protein content, and antioxidant enzymes (polyphenoloxidase and peroxidase) activities as a defense strategy as compared with controls. Under water stress, we demonstrated that phosphorus was improved in the inoculated and amended plants alone or in combination in leaves (AMF2: 807%, AMF1+B2: 657%, AMF2+C1+B2: 500%, AMF2+C2: 478%, AMF1: 423%) and soil (AMF2: 397%, AMF1+B2: 322%, AMF2+C1+B2: 303%, AMF1: 190%, C1: 188%) in comparison with controls under severe water stress conditions. We summarize the extent to which the dual and multiple combinations of microorganisms can overcome challenges related to drought by enhancing plant physiological responses.
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Affiliation(s)
- Mohamed Anli
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Marouane Baslam
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata, Japan
| | - Abdelilah Tahiri
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Anas Raklami
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Sarah Symanczik
- Department of Soil Sciences, Research Institute of Organic Agriculture Frick (FiBL), Frick, Switzerland
| | - Abderrahim Boutasknit
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Mohamed Ait-El-Mokhtar
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Raja Ben-Laouane
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Salma Toubali
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Youssef Ait Rahou
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Mustapha Ait Chitt
- Domaines Agricoles, Laboratoire El Bassatine, Domaine El Bassatine, Meknès, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Toshiaki Mitsui
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata, Japan
| | - Mohamed Hafidi
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
- Mohammed VI Polytechnic University (UM6P), Agrobiosciences program (AgBs), Benguerir, Morocco
| | - Abdelilah Meddich
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
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Benidire L, El Khalloufi F, Oufdou K, Barakat M, Tulumello J, Ortet P, Heulin T, Achouak W. Phytobeneficial bacteria improve saline stress tolerance in Vicia faba and modulate microbial interaction network. Sci Total Environ 2020; 729:139020. [PMID: 32498175 DOI: 10.1016/j.scitotenv.2020.139020] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/24/2020] [Accepted: 04/24/2020] [Indexed: 05/25/2023]
Abstract
Increased global warming, caused by climate change and human activities, will seriously hinder plant development, such as increasing salt concentrations in soils, which will limit water availability for plants. To ensure optimal plant growth under such changing conditions, microorganisms that improve plant growth and health must be integrated into agricultural practices. In the present work, we examined the fate of Vicia faba microbiota structure and interaction network upon inoculation with plant-nodulating rhizobia (Rhizobium leguminosarum RhOF125) and non-nodulating strains (Paenibacillus mucilaginosus BLA7 and Ensifer meliloti RhOL1) in the presence (or absence) of saline stress. Inoculated strains significantly improved plant tolerance to saline stress, suggesting either a direct or indirect effect on the plant response to such stress. To determine the structure of microbiota associated with V. faba, samples of the root-adhering soil (RAS), and the root tissues (RT) of seedlings inoculated (or not) with equal population size of RhOF125, BLA7 and RhOL1 strains and grown in the presence (or absence) of salt, were used to profile the microbial composition by 16S rRNA gene sequencing. The inoculation did not show a significant impact on the composition of the RT microbiota or RAS microbiota. The saline stress shifted the RAS microbiota composition, which correlated with a decrease in Enterobacteriaceae and an increase in Sphingobacterium, Chryseobacterium, Stenotrophomonas, Agrobacterium and Sinorhizobium. When the microbiota of roots and RAS are considered together, the interaction networks for each treatment are quite different and display different key populations involved in community assembly. These findings indicate that upon seed inoculation, community interaction networks rather than their composition may contribute to helping plants to better tolerate environmental stresses. The way microbial populations interfere with each other can have an impact on their functions and thus on their ability to express the genes required to help plants tolerate stresses.
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Affiliation(s)
- Loubna Benidire
- Aix-Marseille Univ, CEA, CNRS, UMR7265, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 Saint Paul Lez Durance, France; Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco; High School of Technology Laayoune, Ibn Zohr University, Morocco
| | - Fatima El Khalloufi
- Aix-Marseille Univ, CEA, CNRS, UMR7265, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 Saint Paul Lez Durance, France; Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco; Laboratory of Chemistry, Modeling and Environmental Sciences, Polydisciplinary Faculty of Khouribga, Sultan Moulay Slimane University, Beni Mellal, B.P.: 145, 25000, Khouribga, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences and Environment (BioMAgE), Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
| | - Mohamed Barakat
- Aix-Marseille Univ, CEA, CNRS, UMR7265, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 Saint Paul Lez Durance, France
| | - Joris Tulumello
- Aix-Marseille Univ, CEA, CNRS, UMR7265, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 Saint Paul Lez Durance, France; Biointrant, SAS BioIntrant, 84120 Pertuis, France
| | - Philippe Ortet
- Aix-Marseille Univ, CEA, CNRS, UMR7265, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 Saint Paul Lez Durance, France
| | - Thierry Heulin
- Aix-Marseille Univ, CEA, CNRS, UMR7265, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 Saint Paul Lez Durance, France
| | - Wafa Achouak
- Aix-Marseille Univ, CEA, CNRS, UMR7265, LEMiRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 Saint Paul Lez Durance, France.
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15
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Raklami A, El Gharmali A, Ait Rahou Y, Oufdou K, Meddich A. Compost and mycorrhizae application as a technique to alleviate Cd and Zn stress in Medicago sativa. Int J Phytoremediation 2020; 23:190-201. [PMID: 32755390 DOI: 10.1080/15226514.2020.1803206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Soil pollution by heavy metals, in the last decades, has become a worldwide major concern for which finding a solution is becoming more important to conserve soil for future generations. This study used an ecotoxicology approach to evaluate the effectiveness of compost and arbuscular mycorrhizal fungus (AMF) and their combination on Medicago sativa performance grown under Zn and Cd stress. At 600 mg/kg of Cd and Zn, a reduction of mycorrhization frequency by 3.6- and 2-fold, respectively, was observed without applying compost. The effect of AMF-Compost combination on alfalfa biomass production was enhanced in the absence and the presence of heavy metals. An improvement of relative water content by 1.7- and 1.5-fold was recorded in case AMF-Compost plant treatments grown under 600 mg/kg of Cd and Zn, respectively. The application of AMF-compost enhanced the stomatal conductance and total chlorophyll in alfalfa plants. Sugar contents were significantly increased in mycorrhized and treated plants with compost compared to the control, regardless of the applied Cd or Zn dose. Phenol content was significantly increased in plants amended with compost alone and treated by Cd. Regarding Cd and Zn accumulation, AMF-compost combination reduced the content of heavy metals accumulated in M. sativa.
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Affiliation(s)
- Anas Raklami
- Faculty of Sciences Semlalia, Laboratory of Microbial Biotechnologies, Agrosciences and Environment, Cadi Ayyad University, Marrakech, Morocco
- Faculty of Sciences Semlalia, Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Cadi Ayyad University, Marrakech, Morocco
| | - Abdelhay El Gharmali
- Faculty of Sciences Semlalia, Laboratory of Water, Biodiversity and Global Change, Cadi Ayyad University, Marrakech, Morocco
| | - Youssef Ait Rahou
- Faculty of Sciences Semlalia, Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Cadi Ayyad University, Marrakech, Morocco
| | - Khalid Oufdou
- Faculty of Sciences Semlalia, Laboratory of Microbial Biotechnologies, Agrosciences and Environment, Cadi Ayyad University, Marrakech, Morocco
| | - Abdelilah Meddich
- Faculty of Sciences Semlalia, Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources, Cadi Ayyad University, Marrakech, Morocco
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16
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Bechtaoui N, Raklami A, Tahiri AI, Benidire L, El Alaoui A, Meddich A, Göttfert M, Oufdou K. Characterization of plant growth promoting rhizobacteria and their benefits on growth and phosphate nutrition of faba bean and wheat. Biol Open 2019; 8:bio043968. [PMID: 31278162 PMCID: PMC6679402 DOI: 10.1242/bio.043968] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 06/27/2019] [Indexed: 11/20/2022] Open
Abstract
In recent years, more attention has been paid to plant growth promoting (PGP) rhizobacteria use as a biofertilizer alternative to chemical fertilizers, which might cause damage to the environment. The main objective of this work was to evaluate the field application of PGP bacteria and rhizobial strains on the productivity of two food crops extensively used in Morocco; Vicia faba L. and Triticum durum L. A field experiment with four treatments was designed: (1) control without inoculation, (2) PGP bacteria alone (P), (3) rhizobia alone (R) and (4) a mixture of PGP-rhizobia (PR). Furthermore, the PGP strains were tested for their ability to solubilize complex mineral phosphorus and potassium and for their production of indole acetic acid and exopolysaccharides. The strains showed several plant growth promoting traits. Field inoculation by these rhizobacteria improved phosphorus uptake and the agronomic parameters of faba bean and wheat plants, such as biomass of shoots and roots, as well as the weight of bean pods and wheat spikes. The most pronounced effect was displayed by rhizobial strains or the combination of PGP-rhizobia. The rhizobacterial inoculation significantly stimulated the growth of both crops and could be used as potential biofertilizers to optimize growth and phosphorus retention capacity.
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Affiliation(s)
- Noura Bechtaoui
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Anas Raklami
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
- Laboratory of Biotechnology and Plant Physiology, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Abdel-Ilah Tahiri
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
- Laboratory of Biotechnology and Plant Physiology, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Loubna Benidire
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Abdelkhalek El Alaoui
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Abdelilah Meddich
- Laboratory of Biotechnology and Plant Physiology, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Michael Göttfert
- Technische Universität Dresden, Institut für Genetik, Helmholtzstr. 10, D-01069 Dresden Germany
| | - Khalid Oufdou
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
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Redouane EM, El Amrani Zerrifi S, El Khalloufi F, Oufdou K, Oudra B, Lahrouni M, Campos A, Vasconcelos V. Mode of action and fate of microcystins in the complex soil-plant ecosystems. Chemosphere 2019; 225:270-281. [PMID: 30877921 DOI: 10.1016/j.chemosphere.2019.03.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 01/17/2019] [Accepted: 03/03/2019] [Indexed: 05/28/2023]
Abstract
Over the last decades, global warming has increasingly stimulated the expansion of cyanobacterial blooms in freshwater ecosystems worldwide, in which toxic cyanobacteria produce various congeners of cyanotoxins, mainly dominated by microcystins (MCs). MCs introduced into agricultural soils have deleterious effects on the germination, growth and development of plants and their associated microbiota, leading to remarkable yield losses. Phytotoxicity of MCs may refer to the inhibition of phosphatases activity, generating deleterious reactive oxygen species, altering gene functioning and phytohormones translocation within the plant. It is also known that MCs can pass through the root membrane barrier, translocate within plant tissues and accumulate into different organs, including edible ones. Also, MCs impact the microbial activity in soil via altering plant-bacterial symbioses and decreasing bacterial growth rate of rhizospheric microbiota. Moreover, MCs can persist in agricultural soils through adsorption to clay-humic acid particles and results in a long-term contact with the plant-microflora complex. However, their bioavailability to plants and half-life in soil seem to be influenced by biodegradation process and soil physicochemical properties. This review reports the latest and most relevant information regarding MCs-phytotoxicity and impact on soil microbiota, the persistence in soil, the degradation by native microflora and the bioaccumulation within plant tissues.
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Affiliation(s)
- El Mahdi Redouane
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah P.O. Box 2390, Marrakech, 40000, Morocco
| | - Soukaina El Amrani Zerrifi
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah P.O. Box 2390, Marrakech, 40000, Morocco
| | - Fatima El Khalloufi
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah P.O. Box 2390, Marrakech, 40000, Morocco; Polydisciplinary Faculty of Khouribga (FPK), Sultan Moulay Slimane University, BP. 145 Khouribga, 25000, Morocco
| | - Khalid Oufdou
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah P.O. Box 2390, Marrakech, 40000, Morocco
| | - Brahim Oudra
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah P.O. Box 2390, Marrakech, 40000, Morocco
| | - Majida Lahrouni
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia Marrakech, Cadi Ayyad University, Av. Prince My Abdellah P.O. Box 2390, Marrakech, 40000, Morocco; Department of Biology, Faculty of Science and Techniques, BP. 509, 52000, Boutalamine, Errachidia, Morocco
| | - Alexandre Campos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros Do Porto de Leixões, Av. General Norton de Matos, S/n, 4450-208, Matosinhos, Portugal
| | - Vitor Vasconcelos
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros Do Porto de Leixões, Av. General Norton de Matos, S/n, 4450-208, Matosinhos, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Rua Do Campo Alegre, 4169-007, Porto, Portugal.
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Raklami A, Bechtaoui N, Tahiri AI, Anli M, Meddich A, Oufdou K. Use of Rhizobacteria and Mycorrhizae Consortium in the Open Field as a Strategy for Improving Crop Nutrition, Productivity and Soil Fertility. Front Microbiol 2019; 10:1106. [PMID: 31164880 PMCID: PMC6536659 DOI: 10.3389/fmicb.2019.01106] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 04/30/2019] [Indexed: 12/25/2022] Open
Abstract
Plant growth promoting rhizobacteria (PGPR) and arbuscular mycorrhizal fungi (AMF) are known for their beneficial effects. In recent years, more attention has been paid to their use as biofertilizers to reduce the use of chemical fertilizers causing significant damage to the environment. To have high plant yields, biofertilizers may not be able to sustain plant demands and could be used in combination with chemical fertilizers. However, the application of biofertilizers in the field such as rhizobacteria and AMF are understudied and powerfully needed. In this context, this study aims to evaluate the effect of inoculation with rhizobacteria and AMF and their potential to stimulate two of the most economically important crops in Mediterranean semi-arid areas (Vicia faba L. and Triticum durum L.). The effect of inoculation was studied in field experiment with six treatments: (i) the control without inoculation (C), (ii) PGPR alone (PG), (iii) rhizobia alone (R), (iv) the mixture of PGPR and rhizobia (PR), (v) AMF alone (M), and (vi) the mixture of PGPR, rhizobia and AMF (PRM). The inoculation with the consortium of PGPR-rhizobia-AMF (PRM) induced the greatest effect. This inoculation improved the growth parameters (dry weight of shoots and roots) of faba bean and wheat. An improvement of 130, 200, and 78% was observed in V. faba shoot and root dry weight, and the number of leaves, respectively. Similarly, shoot and root dry weight and number of leaves of T. durum were enhanced by 293, 258, and 87%, respectively. The inoculation improved the productivity of studied plants presented by the number and weight of bean pods (270 × 104 ha-1 and 30737.5 kg.ha-1) and wheat spikes (440 × 104 ha-1 and 10560 kg.ha-1). In addition, the mineral analyses showed that the inoculation with PGPR-rhizobia-mycorrhizae improved N, P, Ca, K, and Na shoots contents, as well as the contents of sugar and proteins. Finally, we revealed the positive impact of the tested biofertilizers and the interest of adoption of innovative practices improving crops productivity and soil fertility.
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Affiliation(s)
- Anas Raklami
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
- Laboratory of Biotechnology and Plant Physiology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | - Noura Bechtaoui
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | - Abdel-ilah Tahiri
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
- Laboratory of Biotechnology and Plant Physiology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | - Mohamed Anli
- Laboratory of Biotechnology and Plant Physiology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | - Abdelilah Meddich
- Laboratory of Biotechnology and Plant Physiology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | - Khalid Oufdou
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
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Benidire L, Lahrouni M, Daoui K, Fatemi ZEA, Gomez Carmona R, Göttfert M, Oufdou K. Phenotypic and genetic diversity of Moroccan rhizobia isolated from Vicia faba and study of genes that are likely to be involved in their osmotolerance. Syst Appl Microbiol 2018; 41:51-61. [DOI: 10.1016/j.syapm.2017.09.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 09/04/2017] [Accepted: 09/05/2017] [Indexed: 01/28/2023]
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Wahbi S, Prin Y, Thioulouse J, Sanguin H, Baudoin E, Maghraoui T, Oufdou K, Le Roux C, Galiana A, Hafidi M, Duponnois R. Impact of Wheat/Faba Bean Mixed Cropping or Rotation Systems on Soil Microbial Functionalities. Front Plant Sci 2016; 7:1364. [PMID: 27695462 PMCID: PMC5023684 DOI: 10.3389/fpls.2016.01364] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 08/29/2016] [Indexed: 05/21/2023]
Abstract
Cropping systems based on carefully designed species mixtures reveal many potential advantages in terms of enhancing crop productivity, reducing pest and diseases, and enhancing ecological services. Associating cereals and legume production either through intercropping or rotations might be a relevant strategy of producing both type of culture, while benefiting from combined nitrogen fixed by the legume through its symbiotic association with nitrogen-fixing bacteria, and from a better use of P and water through mycorrhizal associations. These practices also participate to the diversification of agricultural productions, enabling to secure the regularity of income returns across the seasonal and climatic uncertainties. In this context, we designed a field experiment aiming to estimate the 2 years impact of these practices on wheat yield and on soil microbial activities as estimated through Substrate Induced Respiration method and mycorrhizal soil infectivity (MSI) measurement. It is expected that understanding soil microbial functionalities in response to these agricultural practices might allows to target the best type of combination, in regard to crop productivity. We found that the tested cropping systems largely impacted soil microbial functionalities and MSI. Intercropping gave better results in terms of crop productivity than the rotation practice after two cropping seasons. Benefits resulting from intercrop should be highly linked with changes recorded on soil microbial functionalities.
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Affiliation(s)
- Sanâa Wahbi
- IRD, UMR LSTMMontpellier, France
- Laboratoire Ecologie et Environnement (Unité Associée au CNRST, URAC 32), Faculté des Sciences Semlalia, Université Cadi AyyadMarrakech, Morocco
| | | | - Jean Thioulouse
- Université Lyon 1, CNRS, UMR5558, Laboratoire de Biométrie et Biologie EvolutiveVilleurbanne, France
| | | | | | - Tasnime Maghraoui
- IRD, UMR LSTMMontpellier, France
- Université Lyon 1, CNRS, UMR5558, Laboratoire de Biométrie et Biologie EvolutiveVilleurbanne, France
- Laboratoire de Biologie et de Biotechnologie des Microorganisms, Faculté des Sciences Semlalia, Université Cadi AyyadMarrakech, Morocco
| | - Khalid Oufdou
- Laboratoire de Biologie et de Biotechnologie des Microorganisms, Faculté des Sciences Semlalia, Université Cadi AyyadMarrakech, Morocco
| | | | | | - Mohamed Hafidi
- Laboratoire Ecologie et Environnement (Unité Associée au CNRST, URAC 32), Faculté des Sciences Semlalia, Université Cadi AyyadMarrakech, Morocco
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Lahrouni M, Oufdou K, El Khalloufi F, Benidire L, Albert S, Göttfert M, Caviedes MA, Rodriguez-Llorente ID, Oudra B, Pajuelo E. Microcystin-tolerant Rhizobium protects plants and improves nitrogen assimilation in Vicia faba irrigated with microcystin-containing waters. Environ Sci Pollut Res Int 2016; 23:10037-10049. [PMID: 26865488 DOI: 10.1007/s11356-016-6223-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 02/01/2016] [Indexed: 06/05/2023]
Abstract
Irrigation of crops with microcystins (MCs)-containing waters-due to cyanobacterial blooms-affects plant productivity and could be a way for these potent toxins entering the food chain. This study was performed to establish whether MC-tolerant rhizobia could benefit growth, nodulation, and nitrogen metabolism of faba bean plants irrigated with MC-containing waters. For that, three different rhizobial strains-with different sensitivity toward MCs-were used: RhOF96 (most MC-sensitive strain), RhOF125 (most MC-tolerant strain), or Vicz1.1 (reference strain). As a control, plants grown without rhizobia and fertilized by NH4NO3 were included in the study. MC exposure decreased roots (30-37 %) and shoots (up to 15 %) dry weights in un-inoculated plants, whereas inoculation with rhizobia protects plants toward the toxic effects of MCs. Nodulation and nitrogen content were significantly impaired by MCs, with the exception of plants inoculated with the most tolerant strain RhOF125. In order to deep into the effect of inoculation on nitrogen metabolism, the nitrogen assimilatory enzymes (glutamine synthetase (GS) and glutamate synthase (GOGAT)) were investigated: Fertilized plants showed decreased levels (15-30 %) of these enzymes, both in shoots and roots. By contrast, inoculated plants retained the levels of these enzymes in shoots and roots, as well as the levels of NADH-GOGAT activity in nodules. We conclude that the microcystin-tolerant Rhizobium protects faba bean plants and improves nitrogen assimilation when grown in the presence of MCs.
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Affiliation(s)
- Majida Lahrouni
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
- Technische Universität Dresden, Institut für Genetik, Helmholtzstr. 10, D-01069, Dresden, Germany
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, c/ Profesor García González, 2, 41012, Sevilla, Spain
| | - Khalid Oufdou
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Fatima El Khalloufi
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
- University Hassan 1st. Polydisciplinary Faculty of Khouribga, BP. 145, 25000, Khouribga, Morocco
| | - Loubna Benidire
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Susann Albert
- Technische Universität Dresden, Institut für Genetik, Helmholtzstr. 10, D-01069, Dresden, Germany
| | - Michael Göttfert
- Technische Universität Dresden, Institut für Genetik, Helmholtzstr. 10, D-01069, Dresden, Germany
| | - Miguel A Caviedes
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, c/ Profesor García González, 2, 41012, Sevilla, Spain
| | - Ignacio D Rodriguez-Llorente
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, c/ Profesor García González, 2, 41012, Sevilla, Spain
| | - Brahim Oudra
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Eloísa Pajuelo
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, c/ Profesor García González, 2, 41012, Sevilla, Spain.
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El Khalloufi F, Oufdou K, Bertrand M, Lahrouni M, Oudra B, Ortet P, Barakat M, Heulin T, Achouak W. Microbiote shift in the Medicago sativa rhizosphere in response to cyanotoxins extract exposure. Sci Total Environ 2016; 539:135-142. [PMID: 26356186 DOI: 10.1016/j.scitotenv.2015.08.127] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 07/06/2015] [Accepted: 08/24/2015] [Indexed: 06/05/2023]
Abstract
The bloom-containing water bodies may have an impact due to cyanotoxins production on other microorganisms and aquatic plants. Where such water is being used for crops irrigation, the presence of cyanotoxins may also have a toxic impact on terrestrial plants and their rhizosphere microbiota. For that purpose, PCR-based 454 pyrosequencing was applied to phylogenetically characterize the bacterial community of Medicago sativa rhizosphere in response to cyanotoxins extract. This analysis revealed a wide diversity at species level, which decreased from unplanted soil to root tissues indicating that only some populations were able to compete for nutrients and niches in this selective habitat. Gemmatimonas, Actinobacteria, Deltaproteobacteria and Opitutae mainly inhabited the bulk soil, whereas, the root-adhering soil and the root tissues were inhabited by Gammaproteobacteria and Alphaproteobacteria. The proportion of these populations fluctuated in response to cyanotoxins extract exposure. Betaproteobacteria proportion increased in the three studied compartments, whereas Gammaproteobacteria proportion decreased except in the bulk soil. This study revealed the potential toxicity of cyanotoxins extract towards Actinobacteria, Gemmatimonas, Deltaproteobacteria, and Gammaproteobacteria, however Clostridia, Opitutae and bacteria related with Betaproteobacteria, were stimulated denoting their tolerance. Altogether, these data indicate that crop irrigation using cyanotoxins containing water might alter the rhizosphere functioning.
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Affiliation(s)
- Fatima El Khalloufi
- CEA, DSV, IBEB, Lab Ecol Microb Rhizosphere & Environ Extrem (LEMiRE), 13108, Saint Paul-Lez-Durance, France; CNRS, BVME UMR 7265, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France; Aix Marseille Université, 13284 Marseille Cedex 07, France; Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco; University Hassan 1st. Polydisciplinary Faculty of Khouribga, BP. 145, 25000 Khouribga, Morocco
| | - Khalid Oufdou
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Marie Bertrand
- CEA, DSV, IBEB, Lab Ecol Microb Rhizosphere & Environ Extrem (LEMiRE), 13108, Saint Paul-Lez-Durance, France; CNRS, BVME UMR 7265, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France; Aix Marseille Université, 13284 Marseille Cedex 07, France
| | - Majida Lahrouni
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Brahim Oudra
- Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
| | - Philippe Ortet
- CEA, DSV, IBEB, Lab Ecol Microb Rhizosphere & Environ Extrem (LEMiRE), 13108, Saint Paul-Lez-Durance, France; CNRS, BVME UMR 7265, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France; Aix Marseille Université, 13284 Marseille Cedex 07, France
| | - Mohamed Barakat
- CEA, DSV, IBEB, Lab Ecol Microb Rhizosphere & Environ Extrem (LEMiRE), 13108, Saint Paul-Lez-Durance, France; CNRS, BVME UMR 7265, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France; Aix Marseille Université, 13284 Marseille Cedex 07, France
| | - Thierry Heulin
- CEA, DSV, IBEB, Lab Ecol Microb Rhizosphere & Environ Extrem (LEMiRE), 13108, Saint Paul-Lez-Durance, France; CNRS, BVME UMR 7265, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France; Aix Marseille Université, 13284 Marseille Cedex 07, France
| | - Wafa Achouak
- CEA, DSV, IBEB, Lab Ecol Microb Rhizosphere & Environ Extrem (LEMiRE), 13108, Saint Paul-Lez-Durance, France; CNRS, BVME UMR 7265, ECCOREV FR 3098, 13108, Saint Paul-Lez-Durance, France; Aix Marseille Université, 13284 Marseille Cedex 07, France.
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El Khalloufi F, Oufdou K, Lahrouni M, Faghire M, Peix A, Ramírez-Bahena MH, Vasconcelos V, Oudra B. Physiological and antioxidant responses of Medicago sativa-rhizobia symbiosis to cyanobacterial toxins (Microcystins) exposure. Toxicon 2013; 76:167-77. [PMID: 24125659 DOI: 10.1016/j.toxicon.2013.10.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 09/23/2013] [Accepted: 10/02/2013] [Indexed: 01/15/2023]
Abstract
Toxic cyanobacteria in freshwaters can induce potent harmful effects on growth and development of plants irrigated with contaminated water. In this study, the effect of cyanobacteria extract containing Microcystins (MC) on Medicago sativa-rhizobia symbiosis was investigated in order to explore plants response through biomass production, photosynthetic pigment and antioxidant enzymes analysis: Peroxidase (POD), Polyphenoloxidase (PPO) and Catalase (CAT). Alfalfa plants were inoculated with two endosymbiotic rhizobial strains: RhOL1 (MC less sensitive strain) and RhOL3 (MC more sensitive strain), to evaluate the rhizobial contribution on the plant response cultured under cyanobacterial toxins stress. The two rhizobia strains were identified as Ensifer meliloti by sequence analysis of their rrs and atpD genes. The chronic exposure to MC extract showed shoot, root and nodules dry weight decrease, in both symbiosis cultures. The rate of decline in plants inoculated with RhOL3 was higher than that in symbiosis with RhOL1 mainly at 20 μg L(-1) of MC. Cyanotoxins also reduced photosynthetic pigment content and generated an oxidative stress observed at cellular level. POD, PPO and CAT activities were significantly increased in leaves, roots and nodules of alfalfa plants exposed to MC. These enzyme activities were higher in plants inoculated with RhOL3 especially when alfalfa plants were exposed to 20 μg L(-1) of MC. The present paper reports new scientific finding related to the behavior of rhizobia-M. sativa associations to MC (Microcystins) for later recommendation concerning the possible use of these symbiosis face to crops exposure to MC contaminated water irrigation.
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Affiliation(s)
- Fatima El Khalloufi
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
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24
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Lahrouni M, Oufdou K, El Khalloufi F, Baz M, Lafuente A, Dary M, Pajuelo E, Oudra B. Physiological and biochemical defense reactions of Vicia faba L.-Rhizobium symbiosis face to chronic exposure to cyanobacterial bloom extract containing microcystins. Environ Sci Pollut Res Int 2013; 20:5405-5415. [PMID: 23417437 DOI: 10.1007/s11356-013-1535-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Accepted: 01/29/2013] [Indexed: 06/01/2023]
Abstract
The presence of cyanotoxins, mainly microcystins (MCs), in surface freshwater represents a serious health risk to aquatic organisms living in the water body, as well as terrestrial animals and plants that are in contact with contaminated water. Consequently, the use of MCs contaminated water for irrigation represents a hazard for cultivated plants and could induce severe economical losses due to crops' yield reduction. The experimental approach undertaken in this work was exposing Vicia faba seedlings (inoculated with a Rhizobium strain resistant to MCs), to water supplemented with cyanobacterial crude extract containing total microcystins at a concentration of 50 and 100 μg/L (environmental relevant concentrations of MCs dissolved in the raw irrigation water from Lalla Takerkoust Lake-Marrakesh region). After chronic MCs exposure (2 months), biological and physiological parameters (plant growth, nitrogen uptake, mineral assimilation, and oxidative defense mechanisms) were evaluated. The results obtained showed evidence that chronic exposure to cyanobacterial bloom extract containing MCs strongly affected the physiological and biological plants activities; reduction of dry matter, photosynthetic activity, nodule number, and nitrogen assimilation. At the same time, an increase of oxidative stress was observed, as deduced from a significant increase of the activities of peroxidase, catalase, polyphenoloxidase, and phenylalanine ammonia lyase in leaves, roots, and nodules of faba bean plants exposed to cyanotoxins, especially at 100 μg/L of MCs. This experimentation constitutes a simulation of the situation related to cyanotoxins chronic exposure of seedlings-plants via the contaminated irrigation water. For this reason, once should take into consideration the possibility of contamination of agricultural crops and the quality of irrigation water should be by the way monitored for cyanotoxins biohazard.
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Affiliation(s)
- Majida Lahrouni
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
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25
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Warda K, Oufdou K, Zahlane K, Bouskraoui M. Antibiotic resistance and serotype distribution of nasopharyngeal isolates of Streptococcus pneumoniae from children in Marrakech region (Morocco). J Infect Public Health 2013; 6:473-81. [PMID: 23999351 DOI: 10.1016/j.jiph.2013.06.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 06/01/2013] [Accepted: 06/09/2013] [Indexed: 10/26/2022] Open
Abstract
Monitoring of Streptococcus pneumoniae antibiotic resistance is of great importance due to the frequency of strains becoming increasingly resistant to antibiotics. In this study, we report the antibiotic susceptibility of the serotypes of S. pneumoniae strains isolated from healthy children aged 1-24 months in the Marrakech region of Morocco. Resistance to penicillin (38.7%) was frequently associated with resistance to other antibiotics. The highest rates of resistance were to cotrimoxazole (trimethoprim/sulfamethoxazole) (49.3%), erythromycin (48.7%), tetracycline (37.3%), lincomycin (35.3%), chloramphenicol (32.7%) and ciprofloxacin (24%). Prisitinamycin and vancomycin were effective against all isolated pneumococcal strains (100% sensitive strains). Gentamycin demonstrated good efficacy on S. pneumoniae, with 98.7% of strains being sensitive. Multidrug resistance characterized 43.33% of all studied strains. Of the multidrug-resistant strains, 36.92% were resistant to erythromycin (E), tetracycline (T) and cotrimoxazole (Co: sulfamethoxazole-trimethoprim) (phenotype ETCo, n = 24), and 20% had decreased susceptibility to beta-lactams, erythromycin and cotrimoxazole (phenotype PECo, n = 13). A total of 29.23% of S. pneumoniae strains exhibited combined resistance to four antibiotics (phenotype PETCo, n = 19). This study reports the status of resistance and multiresistance of S. pneumoniae strains in the Marrakech region of Morocco.
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Affiliation(s)
- Karima Warda
- Laboratory of Microbiology-Virology, Department of Biology, Faculty of Medicine and Pharmacy, University Cadi Ayyad, BP 7010 Sidi Abbad Marrakech, Morocco; Laboratory of Biology and Biotechnology of Microorganisms, Department of Biology, Faculty of Sciences Semlalia, Cadi Ayyad University, Bd Prince My Abdellah, BP 2390, 40000 Marrakech, Morocco.
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Agourram A, Ghirardello D, Rantsiou K, Zeppa G, Belviso S, Romane A, Oufdou K, Giordano M. Phenolic Content, Antioxidant Potential, and Antimicrobial Activities of Fruit and Vegetable By-Product Extracts. International Journal of Food Properties 2013. [DOI: 10.1080/10942912.2011.576446] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Faghire M, Mandri B, Oufdou K, Bargaz A, Ghoulam C, Ramírez-Bahena M, Velázquez E, Peix A. Identification at the species and symbiovar levels of strains nodulating Phaseolus vulgaris in saline soils of the Marrakech region (Morocco) and analysis of the otsA gene putatively involved in osmotolerance. Syst Appl Microbiol 2012; 35:156-64. [DOI: 10.1016/j.syapm.2012.02.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 02/03/2012] [Accepted: 02/04/2012] [Indexed: 11/29/2022]
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28
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El Khalloufi F, El Ghazali I, Saqrane S, Oufdou K, Vasconcelos V, Oudra B. Phytotoxic effects of a natural bloom extract containing microcystins on Lycopersicon esculentum. Ecotoxicol Environ Saf 2012; 79:199-205. [PMID: 22285657 DOI: 10.1016/j.ecoenv.2012.01.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 12/20/2011] [Accepted: 01/03/2012] [Indexed: 05/31/2023]
Abstract
The cyanobacterial toxins microcystins (MC) are known to affect many processes in plants. Their presence in the water used for irrigation may have considerable impact on the survivorship, growth and development of plants. In this study, a crude extract of a toxic cyanobacterial bloom from "Lalla Takerkoust" reservoir (Morocco) was used to study the effects of extract containing MC on tomato plants (Lycopersicon esculentum). Five MC variants: MC-LR, MC-FR, MC-LY, MC-(H4)-YR and DMC-LR were identified by HPLC in the cyanobacterial extract. Exposure of the seeds to the crude extract (containing 22.24 μg MC mL(-1)) caused a reduction of germination up to 85%. Experiments showed that 30 days exposure of plant to the cyanobacterial extract containing MC caused inhibition of L. esculentum growth and productivity, as well as harmful effects on photosystem II activity, measured by Fv/Fm fluorescence. An accumulation of nutrients Na(+), K(+) and Ca(2+) was also registered. The activity of peroxidase and phenolic content indicated that the extract caused an oxidative stress. The tissue necrosis of leaves was also a consequence of MC exposure indicating a disorder in the exposed plant metabolism.
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Affiliation(s)
- Fatima El Khalloufi
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Cadi Ayyad University, Faculty of Sciences Semlalia, P.O. Box 2390, Marrakesh, Morocco
| | - Issam El Ghazali
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Cadi Ayyad University, Faculty of Sciences Semlalia, P.O. Box 2390, Marrakesh, Morocco
| | - Sana Saqrane
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Cadi Ayyad University, Faculty of Sciences Semlalia, P.O. Box 2390, Marrakesh, Morocco
| | - Khalid Oufdou
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Cadi Ayyad University, Faculty of Sciences Semlalia, P.O. Box 2390, Marrakesh, Morocco
| | - Vitor Vasconcelos
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal; CIIMAR/CIMAR Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas, 289, 4050-123 Porto, Portugal.
| | - Brahim Oudra
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Cadi Ayyad University, Faculty of Sciences Semlalia, P.O. Box 2390, Marrakesh, Morocco
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29
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Lahrouni M, Oufdou K, Faghire M, Peix A, El Khalloufi F, Vasconcelos V, Oudra B. Cyanobacterial extracts containing microcystins affect the growth, nodulation process and nitrogen uptake of faba bean (Vicia faba L., Fabaceae). Ecotoxicology 2012; 21:681-687. [PMID: 22113456 DOI: 10.1007/s10646-011-0826-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/09/2011] [Indexed: 05/31/2023]
Abstract
The use of irrigation water containing cyanobacterial toxins may generate a negative impact in both yield and quality of agricultural crops causing significant economic losses. We evaluated the effects of microcystins (MC) on the growth, nodulation process and nitrogen uptake of a Faba bean cultivar (Vicia faba L., Fabaceae), particularly the effect of MC on rhizobia-V. faba symbiosis. Three rhizobial strains (RhOF4, RhOF6 and RhOF21), isolated from nodules of local V. faba were tested. The exposure of rhizobia to MC showed that the toxins had a negative effect on the rhizobial growth especially at the highest concentrations of 50 and 100 μg/l. The germination of faba bean seeds was also affected by cyanotoxins. We registered germination rates of 75 and 68.75% at the toxin levels of 50 and 100 μg/l as compared to the control (100%). The obtained results also showed there was a negative effect of MC on plants shoot, root (dry weight) and total number of nodules per plant. Cyanotoxins exposure induced a significant effect on nitrogen assimilation by faba bean seedlings inoculated with selected rhizobial strains RhOF6 and RhOF21, while the effect was not significant on beans seedling inoculated with RhOF4. This behavior of tolerant rhizobia-legumes symbioses may constitute a very important pathway to increase soil fertility and quality and can represent a friendly biotechnological way to remediate cyanotoxins contamination in agriculture.
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Affiliation(s)
- Majida Lahrouni
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Faculty of Sciences Semlalia, Cadi Ayyad University, PO Box 2390, Marrakech, Morocco
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30
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Faghire M, Bargaz A, Farissi M, Palma F, Mandri B, Lluch C, García NAT, Herrera-Cervera JA, Oufdou K, Ghoulam C. Effect of salinity on nodulation, nitrogen fixation and growth of common bean (Phaseolus vulgaris) inoculated with rhizobial strains isolated from the Haouz region of Morocco. Symbiosis 2011. [DOI: 10.1007/s13199-011-0144-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Aboussaid H, Vidal-Quist JC, Oufdou K, El Messoussi S, Castañera P, González-Cabrera J. Occurrence, characterization and insecticidal activity of Bacillus thuringiensis strains isolated from argan fields in Morocco. Environ Technol 2011; 32:1383-1391. [PMID: 21970180 DOI: 10.1080/09593330.2010.536789] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Soils collected from five locations in the argan forest (an endemic plant) in Morocco were used to form the first collection of Bacillus thuringiensis (Bt) strains from this area (58 strains). Here we found that the argan forest is a major source of Bt, as 90.62% of the samples contained Bt strains. These strains produced mainly spherical or irregular crystals that in some cases remained adhered to the spore after cell lysis. There was no strain producing bipyramidal crystals, suggesting the absence of strains bearing crv1 genes. This was confirmed by PCR analysis using eight primer pairs that can potentially detect 13 different groups of cry and cyt genes. Strains containing cry7/8 were the most abundant (25.53%), followed by strains harbouring cry9A (14.89%), cry11 (8.51%) and cry4 (4.25%). The mixtures of spores and crystals as well as culture supernatants were assayed for toxicity towards Ceratitis capitata (Medfly), showing up to 30% mortality. Our findings suggest that the argan region is a suitable target for future and wider screening programmes looking for strains bearing toxins or combinations of them to develop more efficient Bt-based formulates.
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Affiliation(s)
- H Aboussaid
- Laboratory of Biology and Biotechnology of Microorganisms, Cadi Ayyad University, Faculty of Sciences-Semlalia, Marrakesh, Morocco
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El Khalloufi F, Oufdou K, Lahrouni M, El Ghazali I, Saqrane S, Vasconcelos V, Oudra B. Allelopatic effects of cyanobacteria extracts containing microcystins on Medicago sativa-Rhizobia symbiosis. Ecotoxicol Environ Saf 2011; 74:431-438. [PMID: 21030085 DOI: 10.1016/j.ecoenv.2010.10.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2010] [Revised: 09/17/2010] [Accepted: 10/04/2010] [Indexed: 05/30/2023]
Abstract
The eutrophication of water leads to massive blooms of cyanobacteria potentially producers of highly toxic substances: cyanotoxins, especially microcystins (MC). The contamination of water used for irrigation by these toxins, can cause several adverse effects on plants and microorganisms. In this work, we report the phytotoxic effects of microcystins on the development of symbiosis between the leguminous plant Medicago sativa (Alfalfa) and rhizobia strains. The exposure of rhizobial strains to three different concentrations 0.01, 0.05 and 0.1 μg MC ml(-1) led to decrease on the bacteria growth. The strains of rhizobia Rh L1, Rh L2, Rh L3 and Rh L4 reduced their growth to, respectively, 20.85%, 20.80%, 33.19% and 25.65%. The chronic exposure of alfalfa seeds and seedlings to different MC concentrations affects the whole stages of plant development. The germination process has also been disrupted with an inhibition, which reaches 68.34% for a 22.24 μg MC ml(-1). Further, seedlings growth and photosynthetic process were also disrupted. The toxins reduced significantly the roots length and nodule formation and leads to an oxidative stress. Thus, the MCs contained in lake water and used for irrigation affect the development of symbiosis between M. sativa and Rhizobia.
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Affiliation(s)
- Fatima El Khalloufi
- Laboratory of Biology and Biotechnology of Microorganisms, Environmental Microbiology and Toxicology Unit, Cadi Ayyad University, Faculty of Sciences Semlalia, P.O. Box 2390, Marrakech, Morocco
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Aboussaid H, El-Aouame L, El-Messoussi S, Oufdou K. Biological Activity of Bacillus Thuringiensis (Berliner) Strains on Larvae and Adults of Ceratitis Capitata (Wiedemann) (Diptera: Tephritidae). ACTA ACUST UNITED AC 2010. [DOI: 10.4236/jep.2010.14040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Lamrani Alaoui H, Oufdou K, Mezrioui NE. Determination of several potential virulence factors in non-o1 Vibrio cholerae, Pseudomonas aeruginosa, faecal coliforms and streptococci isolated from Marrakesh groundwater. Water Sci Technol 2010; 61:1895-1905. [PMID: 20371949 DOI: 10.2166/wst.2010.263] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The dynamic, hemolytic and hemagglutination activities and the antibiotic resistance of non-O1 Vibrio cholerae, Pseudomonas aeruginosa, faecal coliforms (FC) and faecal streptococci (FS), isolated by standard membrane filtration methods from suburban and rural groundwater supplies, were carried out. Detectable non-O1 V. cholerae and P. aeruginosa was present in 81% and 88% of samples. The total occurrence of FC and FS during the period of study was 94%. The annual average densities of non-O1 V. cholerae were 4,903 MPN/100 mL. While, they were 206, 1,891 and 1,246 cfu/100 mL for P. aeruginosa, FC and FS respectively. Non-O1 V. cholerae strains had the highest percentage of hemolytic activities (alpha + beta) (71.29%), whereas 20.71% of FS, 16.88% of FC and 9.13% of P. aeruginosa strains produced hemolysin. Bacterial strains isolated were found to be adhesive, with percentages of 63.09%, 65.09%, 84.06% and 87.98% respectively for non-O1 V. cholerae, FS, FC and P. aeruginosa. As for antibiotic resistance, the overall resistance of non-O1 V. cholerae strains was 79%, whereas it was 100% for the other bacteria. Non-O1 V. cholerae resistance was expressed towards sulfamethoxazole (75%), streptomycin (62%) and cephalothin (60%). Obtained results indicated correlation between bacteriological pollution and their public health implications.
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Affiliation(s)
- Hafsa Lamrani Alaoui
- Environmental Microbiology and Toxicology Unit, Laboratory of Biology and Biotechnology of Microorganisms, Faculty of Sciences Semlalia, Cadi Ayyad University, P.O. 2390, Marrakesh 40000, Morocco
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35
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Hallam F, Yacoubi-Khebiza M, Oufdou K, Boulanouar M. [Groundwater quality in an arid area of Morocco: impact of pollution on the biodiversity and relationships between crustaceans and bacteria of health interest]. Environ Technol 2008; 29:1179-1189. [PMID: 18975850 DOI: 10.1080/09593330802180237] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In the north of Marrakesh (Morocco), the high anthropogenic activity and the permeable nature of the geological ground makes the water of Jbilet vulnerable to contamination. The results of physico-chemical analyses conducted in 2006 showed that two groups of wells could be distinguished. Groundwater of wells located on the right bank of the Tensift River, which are far from any source of pollution, is of fairly good quality, well oxygenated, at neutral pH and with rather weak levels of organic compounds. In contrast, in the other wells in the area of the landfill of the city of Marrakesh and those in the peri-urban area demonstrate deteriorated water quality. The nutriment and organic matter content is quite high. Results of bacteriological analyses of water showed a fairly high faecal contamination. In this area the soil is highly permeable and promotes infiltration of organic pollutants and minerals as well as of pathogen and opportunistic bacteria into groundwater. After their penetration, these microorganisms form films around grain particles. The movements of the stygofauna in the interstices allow bacteria to settle on their exoskeleton and seep into their gut, thus being a potential source of groundwater contamination. An analysis of bacterial flora showed that the rate of bacteria is high in the digestive tract of two crustacean species of the stygobites Typhlocirolana haouzensis and Metacrangonyx spinicaudatus, and that it depends on the species and the bacteria. Bacteria may be one of the potential nutritional resources for stygobites.
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Affiliation(s)
- F Hallam
- Equipe d'Hydrobiologie et d'Ecologie souterraine, Laboratoire d'Hydrobiologie, Ecotoxicologie et Assainissement, Université Cadi Ayyad, Marrakech, 40 000, Maroc
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Lamrani Alaoui H, Oufdou K, Mezrioui N. Environmental pollutions impacts on the bacteriological and physicochemical quality of suburban and rural groundwater supplies in Marrakesh area (Morocco). Environ Monit Assess 2008; 145:195-207. [PMID: 18306049 DOI: 10.1007/s10661-007-0029-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2007] [Accepted: 10/30/2007] [Indexed: 05/26/2023]
Abstract
This study scrutinized bacteriological and chemical quality of groundwater supplies of Marrakesh (Morocco) within a year. It assessed the influence of some chemical factors on fecal and opportunistic pathogenic bacterial communities. The annual average densities of fecal coliforms, fecal streptococci and Pseudomonas aeruginosa were respectively: 1891 colony forming units (CFU)/100 mL, 1246 CFU/100 mL and 206 CFU/100 mL. The total occurrence of these bacteria during the period of study was 94%. Detectable non-O1 Vibrio cholerae was present in 81% of samples and the mean abundances ranged from 0 to 11100 MPN/100 mL. Significant correlations between fecal coliforms and streptococci and between fecal coliforms and non-O1 V. cholerae (p < 0.01) were found. Fecal coliforms can be used to detect the presence of non-O1 V. cholerae in this groundwater. These well waters were greatly mineralized, hard, salt with high concentrations of nitrogenous ions and major elements (Ca(2+), Na(+), Cl(-), SO(2-)(4) and K(+)). Most of chemical parameters were relatively steady with time except for calcium, ammonium, nitrites and organic matter which were seasonally influenced. The degree of correlation between chemical parameters and the abundances of isolated bacteria is heterogeneous. The concentrations of calcium and nitrites favored (p < 0.01) the abundance of fecal coliforms and streptococci, but reduced P. aeruginosa abundances. Calcium, salinity, chlorides, nitrites and nitrates tests can be used for screening in situ when the laboratory facilities are limited. This work is expected to assist local authorities in developing plans and actions to reduce the pollution to acceptable levels.
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Affiliation(s)
- H Lamrani Alaoui
- Laboratory of Biology and Biotechnology of Microorganisms, Department of Biology, Faculty of Sciences Semlalia, University Cadi Ayyad, Prince My Abdallah, P.O. 2390, Marrakesh 40000, Morocco
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Oufdou K, Mezrioui N, Oudra B, Loudiki M, Barakate M, Sbiyyâa B. Bioactive compounds from Pseudanabaena species (Cyanobacteria). Microbios 2002; 106 Suppl 1:21-9. [PMID: 11549237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Bioactive products of the multicellular filamentous benthic cyanobacterium, Pseudanabaena species, isolated from wastewater stabilization ponds at Marrakech, were tested against some pathogenic micro-organisms. Extracellular and intracellular products released by this blue-green alga in the stationary, growth phase, reduced the survival of Escherichia coli, Salmonella sp., Staphylococcus aureus and Candida albicans, and stimulated the growth of non-O1 V. cholerae, whereas no significant effect was noted on the growth of Candida tropicalis. Intracellular substances (methanolic extract) had a stronger inhibitory effect on these micro-organisms than that produced by extracellular substances. These antibacterial and antifungal substances may have a pharmacological value. They may have an important ecological effect on the composition of the bacterial community in Marrakech stabilization ponds when blooms of Pseudanabaena species occurred in this sewage treatment ecosystem during hot periods.
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Affiliation(s)
- K Oufdou
- Laboratoire de Microbiologie, Faculté des Sciences-Semlalia, Université Cadi Ayyad, Marrakech, Morocco
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Mezrioui N, Oufdou K, Baleux B. Dynamics of non-O1 Vibrio cholerae and fecal coliforms in experimental stabilization ponds in the arid region of Marrakesh, Morocco, and the effect of pH, temperature, and sunlight on their experimental survival. Can J Microbiol 1995; 41:489-98. [PMID: 7627909 DOI: 10.1139/m95-065] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We studied the spatial-temporal dynamics of non-O1 Vibrio cholerae numbers at a stabilization pond treatment plant. This bacterium's seasonal dynamics were the inverse of those of fecal coliforms, with high levels in hot periods and low levels in cold periods. Stabilization pond treatment did not significantly reduce non-O1 V. cholerae numbers between the system's inflow and outflow points. In contrast, fecal coliforms were reduced by 98.95% in hot periods and by 94.91% in cold periods. Significant rho coefficient values for the Spearman correlation between numbers of non-O1 V. cholerae and temperature and pH of 0.91 and 0.76 respectively, were found at the system's outflow point. An experimental study of the effects of pH, temperature, and sunlight on the survival of non-O1 V. cholerae and fecal coliforms confirmed the inverse behaviour of the two bacterial groups noted in the stabilization ponds. Alkaline pH values of 8 and 8.8 promoted the survival of non-O1 V. cholerae and inhibited that of Escherichia coli. Low temperatures (8 degrees C) prolonged E. coli survival (k = 0.002/h), while a temperature of 23 degrees C reduced it markedly (k = 0.022/h). Non-O1 V. cholerae did not survive as well as E. coli at 8 degrees C (k = 0.009/h). The effect of temperature on non-O1 V. cholerae appeared to be closely linked to nutrient levels. Non-O1 V. cholerae appeared to be less sensitive to sunlight than E. coli whose survival was markedly reduced particularly during summer periods. Non-O1 V. cholerae and E. coli did not behave in the same way in water subjected to stabilization pond treatment. The use of fecal coliforms as an indicator of the potential health hazard of the effluent may not be adequate for this treatment procedure.
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Affiliation(s)
- N Mezrioui
- Laboratoire de microbiologie, Département de biologie, Université Cadi Ayyad, Marrakech, Morocco
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