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Nawaz T, Gu L, Fahad S, Saud S, Bleakley B, Zhou R. Exploring Sustainable Agriculture with Nitrogen-Fixing Cyanobacteria and Nanotechnology. Molecules 2024; 29:2534. [PMID: 38893411 PMCID: PMC11173783 DOI: 10.3390/molecules29112534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 06/21/2024] Open
Abstract
The symbiotic relationship between nitrogen-fixing cyanobacteria and plants offers a promising avenue for sustainable agricultural practices and environmental remediation. This review paper explores the molecular interactions between nitrogen-fixing cyanobacteria and nanoparticles, shedding light on their potential synergies in agricultural nanotechnology. Delving into the evolutionary history and specialized adaptations of cyanobacteria, this paper highlights their pivotal role in fixing atmospheric nitrogen, which is crucial for ecosystem productivity. The review discusses the unique characteristics of metal nanoparticles and their emerging applications in agriculture, including improved nutrient delivery, stress tolerance, and disease resistance. It delves into the complex mechanisms of nanoparticle entry into plant cells, intracellular transport, and localization, uncovering the impact on root-shoot translocation and systemic distribution. Furthermore, the paper elucidates cellular responses to nanoparticle exposure, emphasizing oxidative stress, signaling pathways, and enhanced nutrient uptake. The potential of metal nanoparticles as carriers of essential nutrients and their implications for nutrient-use efficiency and crop yield are also explored. Insights into the modulation of plant stress responses, disease resistance, and phytoremediation strategies demonstrate the multifaceted benefits of nanoparticles in agriculture. Current trends, prospects, and challenges in agricultural nanotechnology are discussed, underscoring the need for responsible and safe nanoparticle utilization. By harnessing the power of nitrogen-fixing cyanobacteria and leveraging the unique attributes of nanoparticles, this review paves the way for innovative, sustainable, and efficient agricultural practices.
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Affiliation(s)
- Taufiq Nawaz
- Department of Biology/Microbiology, South Dakota State University, Brookings, SD 57007, USA
| | - Liping Gu
- Department of Biology/Microbiology, South Dakota State University, Brookings, SD 57007, USA
| | - Shah Fahad
- Department of Biology/Microbiology, South Dakota State University, Brookings, SD 57007, USA
- Department of Agronomy, Abdul Wali Khan University Mardan, Mardan 23200, KP, Pakistan
| | - Shah Saud
- College of Life Science, Linyi University, Linyi 276000, China
| | - Bruce Bleakley
- Department of Biology/Microbiology, South Dakota State University, Brookings, SD 57007, USA
| | - Ruanbao Zhou
- Department of Biology/Microbiology, South Dakota State University, Brookings, SD 57007, USA
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Groß C, Hossen S, Dittrich S, Knorr KH, Borken W, Noll M. Biological nitrogen fixation, diversity and community structure of diazotrophs in two mosses in 25 temperate forests. Environ Microbiol 2024; 26:e16555. [PMID: 38148519 DOI: 10.1111/1462-2920.16555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 11/27/2023] [Indexed: 12/28/2023]
Abstract
Many moss species are associated with nitrogen (N)-fixing bacteria (diazotrophs) that support the N supply of mosses. Our knowledge relates primarily to pristine ecosystems with low atmospheric N input, but knowledge of biological N fixation (BNF) and diazotrophic communities in mosses in temperate forests with high N deposition is limited. We measured BNF rates using the direct stable isotope method and studied the total and potentially active diazotrophic communities in two abundant mosses, Brachythecium rutabulum and Hypnum cupressiforme, both growing on lying deadwood trunks in 25 temperate forest sites. BNF rates in both mosses were similar to those observed in moss species of pristine ecosystems. H. cupressiforme fixed three times more N2 and exhibited lower diazotrophic richness than B. rutabulum. Frankia was the most prominent diazotroph followed by cyanobacteria Nostoc. Manganese, iron, and molybdenum contents in mosses were positively correlated with BNF and diazotrophic communities. Frankia maintained high BNF rates in H. cupressiforme and B. rutabulum even under high chronic N deposition in Central European forests. Moss N concentration and 15 N abundance indicate a rather minor contribution of BNF to the N nutrition of these mosses.
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Affiliation(s)
- Christina Groß
- Department of Soil Ecology, University of Bayreuth, Bayreuth, Germany
| | - Shakhawat Hossen
- Institute for Bioanalysis, Coburg University of Applied Sciences and Arts, Coburg, Germany
| | - Sebastian Dittrich
- Biodiversity and Conservation, Technical University of Dresden, Tharandt, Germany
| | - Klaus-Holger Knorr
- Institute of Landscape Ecology, Ecohydrology and Biogeochemistry Group, University of Münster, Münster, Germany
| | - Werner Borken
- Department of Soil Ecology, University of Bayreuth, Bayreuth, Germany
| | - Matthias Noll
- Institute for Bioanalysis, Coburg University of Applied Sciences and Arts, Coburg, Germany
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Sjøgren TD, Wang Y, Rousk K. Nitrogen fixation associated with two cohabiting moss species expresses different patterns under Cu and Zn contamination. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:85701-85707. [PMID: 37393213 PMCID: PMC10404191 DOI: 10.1007/s11356-023-28404-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 06/19/2023] [Indexed: 07/03/2023]
Abstract
Nitrogen (N2) fixation by moss-associated cyanobacteria is an important N source in pristine ecosystems. Previous studies have shown that moss-associated N2 fixation is sensitive to anthropogenic N pollution. However, we still lack understanding of the effects of other factors derived from anthropogenic sources, such as heavy metal pollution on N2 fixation. To test this, we collected two dominant mosses (Pleurozium schreberi and Spaghnum palustre) from a temperate bog in Denmark and assessed their N2 fixation responses to simulated heavy metal pollution by adding 5 levels (plus a control) of copper (Cu, 0-0.05 mg g dw-1) and zinc (Zn, 0-0.1 mg g dw-1). Metal concentrations in both mosses increased linearly with Cu and Zn addition, but N2 fixation activity associated with S. palustre was to a greater extent negatively affected by both Cu and Zn additions than that associated with P. schreberi. Copper additions even promoted N2 fixation in P. schreberi. Hence, the heavy metal sensitivity of N2-fixing cyanobacteria is dependent on the host moss-species, and the vulnerability of ecosystems towards heavy metal pollution could vary depending on the dominant moss species.
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Affiliation(s)
- Toke Due Sjøgren
- Department of Biology, Center for Volatile Interactions (VOLT), University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark
| | - Yinliu Wang
- Department of Biology, Center for Volatile Interactions (VOLT), University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences, Beijing, 100093, China
| | - Kathrin Rousk
- Department of Biology, Center for Volatile Interactions (VOLT), University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark.
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Alvarenga DO, Rousk K. Unraveling host-microbe interactions and ecosystem functions in moss-bacteria symbioses. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:4473-4486. [PMID: 35728619 DOI: 10.1093/jxb/erac091] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 06/15/2022] [Indexed: 06/15/2023]
Abstract
Mosses are non-vascular plants usually found in moist and shaded areas, with great ecological importance in several ecosystems. This is especially true in northern latitudes, where mosses are responsible for up to 100% of primary production in some ecosystems. Mosses establish symbiotic associations with unique bacteria that play key roles in the carbon and nitrogen cycles. For instance, in boreal environments, more than 35% of the nitrogen fixed by diazotrophic symbionts in peatlands is transferred to mosses, directly affecting carbon fixation by the hosts, while moss-associated methanotrophic bacteria contribute 10-30% of moss carbon. Further, half of ecosystem N input may derive from moss-cyanobacteria associations in pristine ecosystems. Moss-bacteria interactions have consequences on a global scale since northern environments sequester 20% of all the carbon generated by forests in the world and stock at least 32% of global terrestrial carbon. Different moss hosts influence bacteria in distinct ways, which suggests that threats to mosses also threaten unique microbial communities with important ecological and biogeochemical consequences. Since their origin ~500 Ma, mosses have interacted with bacteria, making these associations ideal models for understanding the evolution of plant-microbe associations and their contribution to biogeochemical cycles.
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Affiliation(s)
- Danillo O Alvarenga
- Department of Biology, Terrestrial Ecology Section, University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark
- Centre for Permafrost, University of Copenhagen, Øster Voldgade 10, DK-1350, Copenhagen, Denmark
| | - Kathrin Rousk
- Department of Biology, Terrestrial Ecology Section, University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark
- Centre for Permafrost, University of Copenhagen, Øster Voldgade 10, DK-1350, Copenhagen, Denmark
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Saiz E, Sgouridis F, Drijfhout FP, Peichl M, Nilsson MB, Ullah S. Chronic Atmospheric Reactive Nitrogen Deposition Suppresses Biological Nitrogen Fixation in Peatlands. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:1310-1318. [PMID: 33389989 DOI: 10.1021/acs.est.0c04882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Biological nitrogen fixation (BNF) represents the natural pathway by which mosses meet their demands for bioavailable/reactive nitrogen (Nr) in peatlands. However, following intensification of nitrogen fertilizer and fossil fuel use, atmospheric Nr deposition has increased exposing peatlands to Nr loading often above the ecological threshold. As BNF is energy intensive, therefore, it is unclear whether BNF shuts down when Nr availability is no longer a rarity. We studied the response of BNF under a gradient of Nr deposition extending over decades in three peatlands in the U.K., and at a background deposition peatland in Sweden. Experimental nitrogen fertilization plots in the Swedish site were also evaluated for BNF activity. In situ BNF activity of peatlands receiving Nr deposition of 6, 17, and 27 kg N ha-1 yr-1 was not shut down but rather suppressed by 54, 69, and 74%, respectively, compared to the rates under background Nr deposition of ∼2 kg N ha-1 yr-1. These findings were corroborated by similar BNF suppression at the fertilization plots in Sweden. Therefore, contribution of BNF in peatlands exposed to chronic Nr deposition needs accounting when modeling peatland's nitrogen pools, given that nitrogen availability exerts a key control on the carbon capture of peatlands, globally.
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Affiliation(s)
- Ernesto Saiz
- School of Geography, Geology, and the Environment, Keele University, Staffordshire ST5 5BG, United Kingdom
| | - Fotis Sgouridis
- School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, United Kingdom
| | - Falko P Drijfhout
- Chemical Ecology Group, School of Physical and Chemical Sciences, Keele University, Staffordshire ST5 5BG, United Kingdom
| | - Matthias Peichl
- Department of Forest Ecology & Management, Swedish University of Agricultural Sciences, Umeå 750 07, Sweden
| | - Mats B Nilsson
- Department of Forest Ecology & Management, Swedish University of Agricultural Sciences, Umeå 750 07, Sweden
| | - Sami Ullah
- School of Geography, Earth, and Environmental Sciences, and Birmingham Institute of Forest Research, University of Birmingham, Birmingham B15 2TT, United Kingdom
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