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Boczonádi I, Török Z, Jakab Á, Kónya G, Gyurcsó K, Baranyai E, Szoboszlai Z, Döncző B, Fábián I, Leiter É, Lee MK, Csernoch L, Yu JH, Kertész Z, Emri T, Pócsi I. Increased Cd 2+ biosorption capability of Aspergillus nidulans elicited by crpA deletion. J Basic Microbiol 2020; 60:574-584. [PMID: 32449553 DOI: 10.1002/jobm.202000112] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/27/2020] [Accepted: 04/20/2020] [Indexed: 12/15/2022]
Abstract
The P-type ATPase CrpA is an important Cu2+ /Cd2+ pump in the Aspergilli, significantly contributing to the heavy metal stress tolerance of these ascomycetous fungi. As expected, the deletion of crpA resulted in Cu2+ /Cd2+ -sensitive phenotypes in Aspergillus nidulans on stress agar plates inoculated with conidia. Nevertheless, paradoxical growth stimulations were observed with the ΔcrpA strain in both standard Cu2+ stress agar plate experiments and cellophane colony harvest (CCH) cultures, when exposed to Cd2+ . These observations reflect efficient compensatory mechanisms for the loss of CrpA operating under these experimental conditions. It is remarkable that the ΔcrpA strain showed a 2.7 times higher Cd biosorption capacity in CCH cultures, which may facilitate the development of new, fungal biomass-based bioremediation technologies to extract harmful Cd2+ ions from the environment. The nullification of crpA also significantly changed the spatial distribution of Cu and Cd in CCH cultures, as demonstrated by the combined particle-induced X-ray emission and scanning transmission ion microscopy technique. Most important, the centers of gravity for Cu and Cd accumulations of the ΔcrpA colonies shifted toward the older regions as compared with wild-type surface cultures.
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Affiliation(s)
- Imre Boczonádi
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary.,Juhász-Nagy Pál Doctoral School, University of Debrecen, Debrecen, Hungary
| | - Zsófia Török
- Laboratory for Heritage Science, Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Debrecen, Hungary
| | - Ágnes Jakab
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Gábor Kónya
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Klaudia Gyurcsó
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Edina Baranyai
- Department of Inorganic and Analytical Chemistry, Agilent Atomic Spectroscopy Partner Laboratory, University of Debrecen, Debrecen, Hungary
| | - Zoltán Szoboszlai
- Laboratory for Heritage Science, Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Debrecen, Hungary
| | - Boglárka Döncző
- Laboratory for Heritage Science, Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Debrecen, Hungary
| | - István Fábián
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Debrecen, Hungary.,MTA-DE Redox and Homogeneous Catalytic Reaction Mechanisms Research Group, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Éva Leiter
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Mi-Kyung Lee
- Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejon, Republic of Korea
| | - László Csernoch
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Jae-Hyuk Yu
- Department of Bacteriology, University of Wisconsin, Madison, Wisconsin.,Department of Systems Biotechnology, Konkuk University, Seoul, Republic of Korea
| | - Zsófia Kertész
- Laboratory for Heritage Science, Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Debrecen, Hungary
| | - Tamás Emri
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - István Pócsi
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
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Garcia K, Zimmermann SD. The role of mycorrhizal associations in plant potassium nutrition. FRONTIERS IN PLANT SCIENCE 2014; 5:337. [PMID: 25101097 PMCID: PMC4101882 DOI: 10.3389/fpls.2014.00337] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 06/25/2014] [Indexed: 05/05/2023]
Abstract
Potassium (K(+)) is one of the most abundant elements of soil composition but it's very low availability limits plant growth and productivity of ecosystems. Because this cation participates in many biological processes, its constitutive uptake from soil solution is crucial for the plant cell machinery. Thus, the understanding of strategies responsible of K(+) nutrition is a major issue in plant science. Mycorrhizal associations occurring between roots and hyphae of underground fungi improve hydro-mineral nutrition of the majority of terrestrial plants. The contribution of this mutualistic symbiosis to the enhancement of plant K(+) nutrition is not well understood and poorly studied so far. This mini-review examines the current knowledge about the impact of both arbuscular mycorrhizal and ectomycorrhizal symbioses on the transfer of K(+) from the soil to the plants. A model summarizing plant and fungal transport systems identified and hypothetically involved in K(+) transport is proposed. In addition, some data related to benefits for plants provided by the improvement of K(+) nutrition thanks to mycorrhizal symbioses are presented.
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Affiliation(s)
| | - Sabine D. Zimmermann
- Biochimie et Physiologie Moléculaire des Plantes, UMR 5004 CNRS/INRA/SupAgro/UM2Montpellier, France
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Weigt RB, Raidl S, Verma R, Rodenkirchen H, Göttlein A, Agerer R. Effects of twice-ambient carbon dioxide and nitrogen amendment on biomass, nutrient contents and carbon costs of Norway spruce seedlings as influenced by mycorrhization with Piloderma croceum and Tomentellopsis submollis. MYCORRHIZA 2011; 21:375-391. [PMID: 21107870 DOI: 10.1007/s00572-010-0343-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2010] [Accepted: 10/26/2010] [Indexed: 05/12/2023]
Abstract
Elevated tropospheric CO(2) concentrations may increase plant carbon fixation. In ectomycorrhizal trees, a considerable portion of the synthesized carbohydrates can be used to support the mutualistic fungal root partner which in turn can benefit the tree by increased nutrient supply. In this study, Norway spruce seedlings were inoculated with either Piloderma croceum (medium distance "fringe" exploration type) or Tomentellopsis submollis (medium distance "smooth" exploration type). We studied the impact of either species regarding fungal biomass production, seedling biomass, nutrient status and nutrient use efficiency in rhizotrons under ambient and twice-ambient CO(2) concentrations. A subset was amended with ammonium nitrate to prevent nitrogen imbalances expected under growth promotion by elevated CO(2). The two fungal species exhibited considerably different influences on growth, biomass allocation as well as nutrient uptake of spruce seedlings. P. croceum increased nutrient supply and promoted plant growth more strongly than T. submollis despite considerably higher carbon costs. In contrast, seedlings with T. submollis showed higher nutrient use efficiency, i.e. produced plant biomass per received unit of nutrient, particularly for P, K and Mg, thereby promoting shoot growth and reducing the root/shoot ratio. Under the given low soil nutrient availability, P. croceum proved to be a more favourable fungal partner for seedling development than T. submollis. Additionally, plant internal allocation of nutrients was differently influenced by the two ECM fungal species, particularly evident for P in shoots and for Ca in roots. Despite slightly increased ECM length and biomass production, neither of the two species had increased its capacity of nutrient uptake in proportion to the rise of CO(2). This lead to imbalances in nutritional status with reduced nutrient concentrations, particularly in seedlings with P. croceum. The beneficial effect of P. croceum thus diminished, although the nutrient status of its host plants was still above that of plants with T. submollis. We conclude that the imbalances of nutrient status in response to elevated CO(2) at early stages of plant development are likely to prove particularly severe at nutrient-poor soils as the increased growth of ECM cannot cover the enhanced nutrient demand. Hyphal length and biomass per unit of ectomycorrhizal length as determined for the first time for P. croceum amounted to 6.9 m cm(-1) and 6.0 μg cm(-1), respectively, across all treatments.
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Affiliation(s)
- Rosemarie Barbara Weigt
- Department of Biology I and GeoBio-Center (LMU), Division of Organismic Biology: Mycology, Ludwig-Maximilians-Universität München, Menzinger Str. 67, 80638, Munich, Germany.
| | - Stefan Raidl
- Department of Biology I and GeoBio-Center (LMU), Division of Organismic Biology: Mycology, Ludwig-Maximilians-Universität München, Menzinger Str. 67, 80638, Munich, Germany
| | - Rita Verma
- Department of Biology I and GeoBio-Center (LMU), Division of Organismic Biology: Mycology, Ludwig-Maximilians-Universität München, Menzinger Str. 67, 80638, Munich, Germany
| | - Hermann Rodenkirchen
- Department of Ecology and Ecosystem Management, Forest Nutrition and Water Resources, Technische Universität München, Hans-Carl-von-Carlowitz-Platz 2, 85350, Freising, Germany
| | - Axel Göttlein
- Department of Ecology and Ecosystem Management, Forest Nutrition and Water Resources, Technische Universität München, Hans-Carl-von-Carlowitz-Platz 2, 85350, Freising, Germany
| | - Reinhard Agerer
- Department of Biology I and GeoBio-Center (LMU), Division of Organismic Biology: Mycology, Ludwig-Maximilians-Universität München, Menzinger Str. 67, 80638, Munich, Germany
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Lütz-Meindl U. Use of energy filtering transmission electron microscopy for image generation and element analysis in plant organisms. Micron 2007; 38:181-96. [PMID: 16766193 DOI: 10.1016/j.micron.2006.03.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Revised: 03/16/2006] [Accepted: 03/17/2006] [Indexed: 10/24/2022]
Abstract
Energy filtering TEM (EFTEM) with modern spectrometers and software offers new possibilities for element analysis and image generation in plant cells. In the present review, applications of EFTEM in plant physiology, such as identification of light elements and ion transport, analyses of natural cell incrustations, determination of element exchange between fungi and rootlets during mycorrhiza development, heavy metal storage and detoxification, and employment in plant physiological experiments are summarized. In addition, it is demonstrated that EFTEM can be successfully used in more practical approaches, for example, in phytoremediation, food and wood industry, and agriculture. Preparation methods for plant material as prerequisites for EFTEM analysis are compared with respect to their suitability and technical problems are discussed.
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Affiliation(s)
- Ursula Lütz-Meindl
- Plant Physiology Division, Cell Biology Department, University of Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria.
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Alberton O, Kuyper TW, Gorissen A. Taking mycocentrism seriously: mycorrhizal fungal and plant responses to elevated CO2. THE NEW PHYTOLOGIST 2005; 167:859-68. [PMID: 16101922 DOI: 10.1111/j.1469-8137.2005.01458.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The aim here was to separately assess mycorrhizal fungal and plant responses under elevated atmospheric CO2, and to test a mycocentric model that assumes that increased carbon availability to the fungus will not automatically feed back to enhanced plant growth performance. Meta-analyses were applied across independent studies. Responses were compared in ectomycorrhizal (ECM) and arbuscular mycorrhizal (AM) fungi, and ECM and AM plants. Responses of both mycorrhizal fungi and mycorrhizal plants to elevated CO2 were significantly positive. The response ratio for ECM fungi was 1.34 (an increase of 34%) and for AM fungi 1.21 (21%), indicating a significantly different response. The response ratio for ECM plants was 1.26, similar to that of AM plants (1.25). Fractional colonization proved to be an unsuitable fungal parameter. Evidence was found for the mycocentric view in ECM, but not in AM systems. Fungal identity and plant identity were important parameters that affected response ratios. The need for better descriptors of fungal and plant responses is emphasized.
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Affiliation(s)
- Odair Alberton
- Department of Soil Quality, Wageningen University, PO Box 8005, NL-6700 EC Wageningen, the Netherlands.
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Buscot F, Munch JC, Charcosset JY, Gardes M, Nehls U, Hampp R. Recent advances in exploring physiology and biodiversity of ectomycorrhizas highlight the functioning of these symbioses in ecosystems. FEMS Microbiol Rev 2000; 24:601-14. [PMID: 11077153 DOI: 10.1111/j.1574-6976.2000.tb00561.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Ectomycorrhizas, the dominating mycorrhizal symbiosis in boreal, temperate and some tropical forests, are formed by 5000-6000 species of the asco- and basidiomycetes. This high diversity of fungal partners allows optimal foraging and mobilisation of various nitrogen and phosphorus forms from organic soil layers. In this review, two approaches to study the functioning of this multitude of symbiotic associations are presented. On selected culture models, physiological and molecular investigations have shown that the supply of hexoses has a key function in controlling the plant-fungus interaction via partner-specific regulation of gene expression. Environmental factors which affect fungal carbon supply, such as increased nitrogen availability, also affect mycorrhiza formation. Based on such laboratory results, the adaptative capability of ectomycorrhizas to changing field conditions is discussed. The second approach consists of analysing the distribution of mycorrhizas in ecosystem compartments and to relate distribution patterns to variations of ecological factors. Recent advances in identification of fungal partners in ectomycorrhizas by analysing the internal transcribed spacer of ribosomal DNA are presented, which can help to resolve sampling problems in field studies. The limits of the laboratory and the field approaches are discussed. Despite some problems, this combined approach is the most promising. Direct investigation of gene expression, which has been introduced for soil bacteria, will be difficult in the case of mycorrhizal fungi which constitute organisms with functionally varying structures.
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Affiliation(s)
- F Buscot
- Lehrbereich Umweltwissenschaften, Institut für Okologie, Friedrich-Schiller-Universität Jena, Germany
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