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Fan D, Zhao Z, Wang Y, Ma J, Wang X. Crop-type-driven changes in polyphenols regulate soil nutrient availability and soil microbiota. Front Microbiol 2022; 13:964039. [PMID: 36090073 PMCID: PMC9449698 DOI: 10.3389/fmicb.2022.964039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 08/08/2022] [Indexed: 11/13/2022] Open
Abstract
Crop rotation is a typical agronomic practice to mitigate soil deterioration caused by continuous cropping. However, the mechanisms of soil biotic and abiotic factors in response to different cropping patterns in acidic and polyphenol-rich tea nurseries remain unclear. In this study, the composition and function of microbial communities were comparatively investigated in soils of tea seedlings continuously planted for 2 years (AC: autumn-cutting; SC: summer-cutting) and in soils rotation with strawberries alternately for 3 years (AR: autumn-cutting). The results showed that AR significantly improved the survival of tea seedlings but greatly reduced the contents of soil polyphenols. The lower soil polyphenol levels in AR were associated with the decline of nutrients (SOC, TN, Olsen-P) availability, which stimulates the proliferation of nutrient cycling-related bacteria and mixed-trophic fungi, endophytic fungi and ectomycorrhizal fungi, thus further satisfying the nutrient requirements of tea seedlings. Moreover, lower levels of polyphenols facilitated the growth of plant beneficial microorganisms (Bacillus, Mortierella, etc.) and suppressed pathogenic fungi (Pseudopestalotiopsis, etc.), creating a more balanced microbial community that is beneficial to plant health. Our study broadens the understanding of the ecological role of plant secondary metabolites and provides new insights into the sustainability of tea breeding.
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Affiliation(s)
- Dongmei Fan
- Department of Tea Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Zhumeng Zhao
- Department of Tea Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
- Hainan Institute, Zhejiang University, Sanya, China
| | - Yu Wang
- Department of Tea Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Junhui Ma
- Administration of Agriculture and Rural Affairs of Lishui, Lishui, China
| | - Xiaochang Wang
- Department of Tea Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
- *Correspondence: Xiaochang Wang,
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Zhang QF, Laanbroek HJ. Tannins from senescent Rhizophora mangle mangrove leaves have a distinctive effect on prokaryotic and eukaryotic communities in a Distichlis spicata salt marsh soil. FEMS Microbiol Ecol 2020; 96:5876345. [PMID: 32710789 DOI: 10.1093/femsec/fiaa148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/23/2020] [Indexed: 11/13/2022] Open
Abstract
Due to climate warming, tannin-rich Rhizophora mangle migrates into tannin-poor salt marshes, where the tannins interfere with the biogeochemistry in the soil. Changes in biogeochemistry are likely associated with changes in microbial communities. This was studied in microcosms filled with salt marsh soil and amended with leaf powder, crude condensed tannins, purified condensed tannins (PCT), all from senescent R. mangle leaves, or with tannic acid. Size and composition of the microbial communities were determined by denaturing gradient gel electrophoresis, high-throughput sequencing and real-time PCR based on the 16S and 18S rRNA genes. Compared with the control, the 16S rRNA gene abundance was lowered by PCT, while the 18S rRNA gene abundance was enhanced by all treatments. The treatments also affected the composition of the 16S rRNA and 18S rRNA gene assemblies, but the effects on the 18S rRNA gene were greater. The composition of the 18S rRNA gene, but not of the 16S rRNA gene, was significantly correlated with the mineralization of carbon, nitrogen and phosphorus. Distinctive microbial groups emerged during the different treatments. This study revealed that migration of mangroves may affect both the prokaryotic and the eukaryotic communities in salt marsh soils, but that the effects on the eukaryotes will likely be greater.
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Affiliation(s)
- Qiu-Fang Zhang
- College of Oceanology and Food Science, Quanzhou Normal University, 398 Donghai Street, Quanzhou 362000, China.,Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB Wageningen, The Netherlands.,Fujian Province Key Laboratory for the Development of Bioactive Material from Marine Algae, Quanzhou 362100, China
| | - Hendrikus J Laanbroek
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB Wageningen, The Netherlands.,Ecology and Biodiversity Group, Department of Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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3
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Bernard L, Decau ML, Morvan-Bertrand A, Lavorel S, Clément JC. Water-soluble carbohydrates in Patzkea paniculata (L.): a plant strategy to tolerate snowpack reduction and spring drought in subalpine grasslands. PLANT BIOLOGY (STUTTGART, GERMANY) 2020; 22:441-449. [PMID: 31834979 DOI: 10.1111/plb.13081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/28/2019] [Indexed: 06/10/2023]
Abstract
In subalpine grasslands of the central French Alps, cessation of traditional mowing promotes dominance of Patzkea paniculata (L.) G.H.Loos (Poaceae) tussocks, with high biomass but low fodder quality. Mowing limits P. paniculata abundance through the depletion of its water-soluble carbohydrate (WSC) reserves, which sustain early spring growth initiation. However, the effectiveness of mowing effects is modulated by grassland functional composition, fertilization and climate change, as WSC compounds, and notably fructans, support plant physiological responses to climate stresses such as drought or frost. To characterize the mechanisms underpinning the control of P. paniculata under global change, we tested the effects of climate manipulation (combined snow removal and drought) and management (cutting and fertilization) alone or in combination on P. paniculata WSC storage in assembled grassland communities of varying functional composition. Management and climate treatments individually decreased seasonal fructan storage, with neither additive nor synergic effects between them, primarily due to the dominance of management over climate effects. Fructan amounts were higher in individuals growing in unmanaged exploitative communities compared to unmanaged conservative communities, regardless of climate treatments, but management overrode these differences. Our findings suggest that reduction by combined snow removal and drought of P. paniculata carbon allocation to WSC storage may similarly limit its dominance to that in current mowing practices.
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Affiliation(s)
- L Bernard
- CNRS, LECA, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, Grenoble, France
| | - M-L Decau
- INRA, EVA, Normandie Université, Caen, France
| | | | - S Lavorel
- CNRS, LECA, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, Grenoble, France
| | - J-C Clément
- CNRS, LECA, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, Grenoble, France
- INRA, CARRTEL, Univ. Savoie Mont Blanc, Thonon-les-Bains, France
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4
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Pugnaire FI, Morillo JA, Peñuelas J, Reich PB, Bardgett RD, Gaxiola A, Wardle DA, van der Putten WH. Climate change effects on plant-soil feedbacks and consequences for biodiversity and functioning of terrestrial ecosystems. SCIENCE ADVANCES 2019; 5:eaaz1834. [PMID: 31807715 PMCID: PMC6881159 DOI: 10.1126/sciadv.aaz1834] [Citation(s) in RCA: 114] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 10/28/2019] [Indexed: 05/19/2023]
Abstract
Plant-soil feedbacks (PSFs) are interactions among plants, soil organisms, and abiotic soil conditions that influence plant performance, plant species diversity, and community structure, ultimately driving ecosystem processes. We review how climate change will alter PSFs and their potential consequences for ecosystem functioning. Climate change influences PSFs through the performance of interacting species and altered community composition resulting from changes in species distributions. Climate change thus affects plant inputs into the soil subsystem via litter and rhizodeposits and alters the composition of the living plant roots with which mutualistic symbionts, decomposers, and their natural enemies interact. Many of these plant-soil interactions are species-specific and are greatly affected by temperature, moisture, and other climate-related factors. We make a number of predictions concerning climate change effects on PSFs and consequences for vegetation-soil-climate feedbacks while acknowledging that they may be context-dependent, spatially heterogeneous, and temporally variable.
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Affiliation(s)
- Francisco I. Pugnaire
- Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, Carretera de Sacramento s/n, La Cañada de San Urbano, E-04120 Almería, Spain
- Laboratorio Internacional en Cambio Global (LINCGlobal)
| | - José A. Morillo
- Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, Carretera de Sacramento s/n, La Cañada de San Urbano, E-04120 Almería, Spain
- Laboratorio Internacional en Cambio Global (LINCGlobal)
| | - Josep Peñuelas
- Consejo Superior de Investigaciones Científicas, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra, Catalonia E-08193, Spain
- CREAF, Cerdanyola del Vallès, Catalonia E-08193, Spain
| | - Peter B. Reich
- Department of Forest Resources, University of Minnesota, St. Paul, MN 55108, USA
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW 2753, Australia
| | - Richard D. Bardgett
- Department of Earth and Environmental Sciences, The University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
| | - Aurora Gaxiola
- Laboratorio Internacional en Cambio Global (LINCGlobal)
- Departamento de Ecología, Pontificia Universidad Católica de Chile, Alameda 340, Santiago, Chile
- Instituto de Ecología y Biodiversidad, Las Palmeras 3425, Santiago, Chile
| | - David A. Wardle
- Asian School of the Environment, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Wim H. van der Putten
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Post Office Box 50, 6700 AB Wageningen, Netherlands
- Department of Nematology, Wageningen University, 6708 PB Wageningen, Netherlands
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5
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Martinez‐Almoyna C, Thuiller W, Chalmandrier L, Ohlmann M, Foulquier A, Clément J, Zinger L, Münkemüller T. Multi‐trophic β‐diversity mediates the effect of environmental gradients on the turnover of multiple ecosystem functions. Funct Ecol 2019. [DOI: 10.1111/1365-2435.13393] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Camille Martinez‐Almoyna
- Univ. Grenoble Alpes CNRS, Univ. Savoie Mont Blanc, LECA, Laboratoire d’Ecologie Alpine Grenoble France
| | - Wilfried Thuiller
- Univ. Grenoble Alpes CNRS, Univ. Savoie Mont Blanc, LECA, Laboratoire d’Ecologie Alpine Grenoble France
| | | | - Marc Ohlmann
- Univ. Grenoble Alpes CNRS, Univ. Savoie Mont Blanc, LECA, Laboratoire d’Ecologie Alpine Grenoble France
| | - Arnaud Foulquier
- Univ. Grenoble Alpes CNRS, Univ. Savoie Mont Blanc, LECA, Laboratoire d’Ecologie Alpine Grenoble France
| | | | - Lucie Zinger
- Ecole Normale Supérieure, CNRS, Inserm Institut de Biologie de l'Ecole Normale Supérieure (IBENS) PSL Research University Paris France
| | - Tamara Münkemüller
- Univ. Grenoble Alpes CNRS, Univ. Savoie Mont Blanc, LECA, Laboratoire d’Ecologie Alpine Grenoble France
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6
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García-Palacios P, Shaw EA, Wall DH, Hättenschwiler S. Temporal dynamics of biotic and abiotic drivers of litter decomposition. Ecol Lett 2016; 19:554-63. [PMID: 26947573 DOI: 10.1111/ele.12590] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 11/30/2015] [Accepted: 01/28/2016] [Indexed: 11/28/2022]
Abstract
Climate, litter quality and decomposers drive litter decomposition. However, little is known about whether their relative contribution changes at different decomposition stages. To fill this gap, we evaluated the relative importance of leaf litter polyphenols, decomposer communities and soil moisture for litter C and N loss at different stages throughout the decomposition process. Although both microbial and nematode communities regulated litter C and N loss in the early decomposition stages, soil moisture and legacy effects of initial differences in litter quality played a major role in the late stages of the process. Our results provide strong evidence for substantial shifts in how biotic and abiotic factors control litter C and N dynamics during decomposition. Taking into account such temporal dynamics will increase the predictive power of decomposition models that are currently limited by a single-pool approach applying control variables uniformly to the entire decay process.
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Affiliation(s)
- Pablo García-Palacios
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE) UMR 5175, CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE, 1919 Route de Mende, 34293, Montpellier, France
| | - E Ashley Shaw
- Department of Biology and Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, 80523, USA
| | - Diana H Wall
- Department of Biology and Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, 80523, USA
| | - Stephan Hättenschwiler
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE) UMR 5175, CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE, 1919 Route de Mende, 34293, Montpellier, France
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7
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Liu Z, Yao L, Fan C. Optimization of fermentation conditions of pectin production from Aspergillus terreus and its partial characterization. Carbohydr Polym 2015; 134:627-34. [DOI: 10.1016/j.carbpol.2015.08.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/03/2015] [Accepted: 08/12/2015] [Indexed: 11/27/2022]
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8
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Simonin M, Guyonnet JP, Martins JMF, Ginot M, Richaume A. Influence of soil properties on the toxicity of TiO₂ nanoparticles on carbon mineralization and bacterial abundance. JOURNAL OF HAZARDOUS MATERIALS 2015; 283:529-35. [PMID: 25464292 DOI: 10.1016/j.jhazmat.2014.10.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 09/27/2014] [Accepted: 10/03/2014] [Indexed: 05/12/2023]
Abstract
Information regarding the impact of low concentration of engineered nanoparticles on soil microbial communities is currently limited and the importance of soil characteristics is often neglected in ecological risk assessment. To evaluate the impact of TiO2 nanoparticles (NPs) on soil microbial communities (measured on bacterial abundance and carbon mineralization activity), 6 agricultural soils exhibiting contrasted textures and organic matter contents were exposed for 90 days to a low environmentally relevant concentration or to an accidental spiking of TiO2-NPs (1 and 500mgkg(-1) dry soil, respectively) in microcosms. In most soils, TiO2-NPs did not impact the activity and abundance of microbial communities, except in the silty-clay soil (high OM) where C-mineralization was significantly lowered, even with the low NPs concentration. Our results suggest that TiO2-NPs toxicity does not depend on soil texture but likely on pH and OM content. We characterized TiO2-NPs aggregation and zeta potential in soil solutions, in order to explain the difference of TiO2-NPs effects on soil C-mineralization. Zeta potential and aggregation of TiO2-NPs in the silty-clay (high OM) soil solution lead to a lower stability of TiO2-NP-aggregates than in the other soils. Further experiments would be necessary to evaluate the relationship between TiO2-NPs stability and toxicity in the soil.
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Affiliation(s)
- Marie Simonin
- Université de Lyon, Lyon, France; Université Claude Bernard Lyon 1, Villeurbanne, France; CNRS, UMR 5557, Ecologie Microbienne, Université Lyon 1, Villeurbanne, France; UJF-Grenoble/CNRS-INSU/G-INP/IRD, LTHE UMR 5564, Grenoble F-38041, France
| | - Julien P Guyonnet
- Université de Lyon, Lyon, France; Université Claude Bernard Lyon 1, Villeurbanne, France; CNRS, UMR 5557, Ecologie Microbienne, Université Lyon 1, Villeurbanne, France
| | - Jean M F Martins
- UJF-Grenoble/CNRS-INSU/G-INP/IRD, LTHE UMR 5564, Grenoble F-38041, France
| | - Morgane Ginot
- Université de Lyon, Lyon, France; Université Claude Bernard Lyon 1, Villeurbanne, France; CNRS, UMR 5557, Ecologie Microbienne, Université Lyon 1, Villeurbanne, France
| | - Agnès Richaume
- Université de Lyon, Lyon, France; Université Claude Bernard Lyon 1, Villeurbanne, France; CNRS, UMR 5557, Ecologie Microbienne, Université Lyon 1, Villeurbanne, France.
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9
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Desaunay A, Martins JMF. Comparison of chemical washing and physical cell-disruption approaches to assess the surface adsorption and internalization of cadmium by Cupriavidus metallidurans CH34. JOURNAL OF HAZARDOUS MATERIALS 2014; 273:231-238. [PMID: 24747375 DOI: 10.1016/j.jhazmat.2014.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 02/19/2014] [Accepted: 03/04/2014] [Indexed: 06/03/2023]
Abstract
Bacterial biosorption of heavy metals is often considered as a surface complexation process, without considering other retention compartments than cell walls. Although this approach gives a good description of the global biosorption process, it hardly permits the prediction of the fate of biosorbed metals in the environment. This study examines the subcellular distribution of cadmium (Cd) in the metal-tolerant bacterium Cupriavidus metallidurans CH34 through the comparison of an indirect chemical method (washing cells with EDTA) and a direct physical method (physical disruption of cells). The chemical washing approach presented strong experimental biases leading to the overestimation of washed amount of Cd, supposedly bound to cell membranes. On the contrary, the physical disruption approach gave reproducible and robust results of Cd subcellular distribution. Unexpectedly, these results showed that over 80% of passively biosorbed Cd is internalized in the cytoplasm. In disagreement with the common concept of surface complexation of metals onto bacteria the cell wall was poorly reactive to Cd. Our results indicate that metal sorption onto bacterial surfaces is only a first step in metal management by bacteria and open new perspectives on metal biosorption by bacteria in the environment, with implications for soil bioremediation or facilitated transport of metals by bacteria.
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Affiliation(s)
- Aurélien Desaunay
- LTHE-CNRS-Univ. Grenoble I (UMR 5564), Domaine Universitaire BP 53, 38041 Grenoble Cedex 9, France
| | - Jean M F Martins
- LTHE-CNRS-Univ. Grenoble I (UMR 5564), Domaine Universitaire BP 53, 38041 Grenoble Cedex 9, France.
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10
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Moctezuma C, Hammerbacher A, Heil M, Gershenzon J, Méndez-Alonzo R, Oyama K. Specific polyphenols and tannins are associated with defense against insect herbivores in the tropical oak Quercus oleoides. J Chem Ecol 2014; 40:458-67. [PMID: 24809533 DOI: 10.1007/s10886-014-0431-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 03/08/2014] [Accepted: 04/09/2014] [Indexed: 12/25/2022]
Abstract
The role of plant polyphenols as defenses against insect herbivores is controversial. We combined correlative field studies across three geographic regions (Northern Mexico, Southern Mexico, and Costa Rica) with induction experiments under controlled conditions to search for candidate compounds that might play a defensive role in the foliage of the tropical oak, Quercus oleoides. We quantified leaf damage caused by four herbivore guilds (chewers, skeletonizers, leaf miners, and gall forming insects) and analyzed the content of 18 polyphenols (including hydrolyzable tannins, flavan-3-ols, and flavonol glycosides) in the same set of leaves using high performance liquid chromatography and mass spectrometry. Foliar damage ranged from two to eight percent per region, and nearly 90% of all the damage was caused by chewing herbivores. Damage due to chewing herbivores was positively correlated with acutissimin B, catechin, and catechin dimer, and damage by mining herbivores was positively correlated with mongolinin A. By contrast, gall presence was negatively correlated with vescalagin and acutissimin B. By using redundancy analysis, we searched for the combinations of polyphenols that were associated to natural herbivory: the combination of mongolinin A and acutissimin B had the highest association to herbivory. In a common garden experiment with oak saplings, artificial damage increased the content of acutissimin B, mongolinin A, and vescalagin, whereas the content of catechin decreased. Specific polyphenols, either individually or in combination, rather than total polyphenols, were associated with standing leaf damage in this tropical oak. Future studies aimed at understanding the ecological role of polyphenols can use similar correlative studies to identify candidate compounds that could be used individually and in biologically meaningful combinations in tests with herbivores and pathogens.
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Affiliation(s)
- Coral Moctezuma
- Centro de Investigaciones en Ecosistemas, Universidad Nacional Autónoma de México (UNAM), Antigua Carretera a Pátzcuaro No. 8701 Col. Ex-Hacienda de San José de La Huerta, Morelia, Michoacán, 58190, Mexico,
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11
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Thébault A, Clément JC, Ibanez S, Roy J, Geremia RA, Pérez CA, Buttler A, Estienne Y, Lavorel S. Nitrogen limitation and microbial diversity at the treeline. OIKOS 2014. [DOI: 10.1111/j.1600-0706.2013.00860.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Rolland du Roscoat S, Martins J, Séchet P, Vince E, Latil P, Geindreau C. Application of synchrotron X-ray microtomography for visualizing bacterial biofilms 3D microstructure in porous media. Biotechnol Bioeng 2013; 111:1265-71. [DOI: 10.1002/bit.25168] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 10/25/2013] [Accepted: 11/26/2013] [Indexed: 11/11/2022]
Affiliation(s)
- S. Rolland du Roscoat
- Laboratoire 3SR; UMR CNRS 5521; Université Joseph Fourier de Grenoble; Grenoble-INP; Domaine Universitaire, BP53 38041 Grenoble Cedex 9 France
- European Synchrotron Radiation Facility; ID 19, BP 220 38043 Grenoble Cedex 9 France
| | - J.M.F. Martins
- Laboratoire d'Etudes des Transferts en Hydrologie et Environnement (LTHE); UMR 5564 CNRS- Université Joseph Fourier de Grenoble; Grenoble-INP; Grenoble Cedex 9 France
| | - P. Séchet
- Laboratoire des Ecoulements Géophysiques et Industriels (LEGI); UMR CNRS 5519; Université Joseph Fourier de Grenoble; Grenoble-INP; Grenoble Cedex 9 France
| | - E. Vince
- Laboratoire d'Etudes des Transferts en Hydrologie et Environnement (LTHE); UMR 5564 CNRS- Université Joseph Fourier de Grenoble; Grenoble-INP; Grenoble Cedex 9 France
| | - P. Latil
- Laboratoire 3SR; UMR CNRS 5521; Université Joseph Fourier de Grenoble; Grenoble-INP; Domaine Universitaire, BP53 38041 Grenoble Cedex 9 France
| | - C. Geindreau
- Laboratoire 3SR; UMR CNRS 5521; Université Joseph Fourier de Grenoble; Grenoble-INP; Domaine Universitaire, BP53 38041 Grenoble Cedex 9 France
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13
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Schmidt MA, Kreinberg AJ, Gonzalez JM, Halvorson JJ, French E, Bollmann A, Hagerman AE. Soil microbial communities respond differently to three chemically defined polyphenols. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2013; 72:190-197. [PMID: 23545181 DOI: 10.1016/j.plaphy.2013.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 03/07/2013] [Indexed: 06/02/2023]
Abstract
High molecular weight polyphenols (e.g. tannins) that enter the soil may affect microbial populations, by serving as substrates for microbial respiration or by selecting for certain microbes. In this study we examined how three phenolic compounds that represent some environmentally widespread tannins or their constituent functional groups were respired by soil microorganisms and how the compounds affected the abundance and diversity of soil bacteria and archaea, including ammonia oxidizers. An acidic, silt loam soil from a pine forest was incubated for two weeks with the monomeric phenol methyl gallate, the small polyphenol epigallocatechin gallate, or the large polyphenol oenothein B. Respiration of the polyphenols during the incubation was measured using the Microresp™ system. After incubation, metabolic diversity was determined by community level physiological profiling (CLPP), and genetic diversity was determined using denaturing gradient gel electrophoresis (DGGE) analysis on DNA extracted from the soil samples. Total microbial populations and ammonia-oxidizing populations were measured using real time quantitative polymerase chain reaction (qPCR). Methyl gallate was respired more efficiently than the higher molecular weight tannins but not as efficiently as glucose. Methyl gallate and epigallocatechin gallate selected for genetically or physiologically unique populations compared to glucose. None of the polyphenols supported microbial growth, and none of the polyphenols affected ammonia-oxidizing bacterial populations or ammonia-oxidizing archaea. Additional studies using both a wider range of polyphenols and a wider range of soils and environments are needed to elucidate the role of polyphenols in determining soil microbiological diversity.
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Affiliation(s)
- Michael A Schmidt
- Department of Chemistry & Biochemistry, Miami University, Oxford, OH 45056, USA
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14
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Martins JMF, Majdalani S, Vitorge E, Desaunay A, Navel A, Guiné V, Daïan JF, Vince E, Denis H, Gaudet JP. Role of macropore flow in the transport of Escherichia coli cells in undisturbed cores of a brown leached soil. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2013; 15:347-356. [PMID: 25208699 DOI: 10.1039/c2em30586k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The objective of this work was to evaluate the transport of Escherichia coli cells in undisturbed cores of a brown leached soil collected at La Côte St André (France). Two undisturbed soil cores subjected to repeated injections of bacterial cells and/or bromide tracer were used to investigate the effect of soil hydrodynamics and ionic strength on cell mobility. Under the tested experimental conditions, E. coli cells were shown to be transported at the water velocity (retardation factor close to 1) and their retention appeared almost insensitive to water flow and ionic strength variations, both factors being known to control bacterial transport in model saturated porous media. In contrast, E. coli breakthrough curves evolved significantly along with the repetition of the cell injections in each soil core, with a progressive acceleration of their transport. The evolution of E. coli cells BTCs was shown to be due to the evolution of the structure of soil hydraulic pathways caused by the repeated water infiltrations and drainage as may occur in the field. This evolution was demonstrated through mercury intrusion porosimetry (MIP) performed on soil aggregates before and after the repeated infiltrations of bacteria. MIP revealed a progressive and important reduction of the soil aggregate porosity, n, that decreased from approximately 0.5 to 0.3, along with a decrease of the soil percolating step from 27 to 2 μm. From this result a clear compaction of soil aggregates was evidenced that concerned preferentially the pores larger than 2 μm equivalent diameter, i.e. those allowing bacterial cell passage. Since no significant reduction of the global soil volume was observed at the core scale, this aggregate compaction was accompanied by macropore formation that became progressively the preferential hydraulic pathway in the soil cores, leading to transiently bi-modal bacterial BTCs. The evolution of the soil pore structure induced a modification of the main hydrodynamic processes, evolving from a matrix-dominant transfer of water and bacteria to a macropore-dominant transfer. This work points out the importance of using undisturbed natural soils to evaluate the mobility of bacteria in the field, since the evolving hydrodynamic properties of soils appeared to dominate most physicochemical factors.
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Affiliation(s)
- Jean M F Martins
- Laboratoire d'Etudes des Transferts en Hydrologie et Environnement (LTHE, UMR 5564), CNRS-INSU/Univ. Grenoble I/INPG/IRD, Domaine Universitaire, BP53-38041, Grenoble Cedex 9, France.
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Gauri S, Mandal S, Atta S, Dey S, Pati B. Novel route of tannic acid biotransformation and their effect on major biopolymer synthesis in Azotobacter
sp. SSB81. J Appl Microbiol 2012; 114:84-95. [PMID: 23035941 DOI: 10.1111/jam.12030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 09/12/2012] [Accepted: 09/20/2012] [Indexed: 11/29/2022]
Affiliation(s)
- S.S. Gauri
- Department of Microbiology; Vidyasagar University; Midnapore West Bengal India
- Department of Biotechnology; Indian Institute of Technology Kharagpur; Kharagpur India
| | - S.M. Mandal
- Central Research Facility; Indian Institute of Technology Kharagpur; Kharagpur West Bengal India
| | - S. Atta
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur West Bengal India
| | - S. Dey
- Department of Biotechnology; Indian Institute of Technology Kharagpur; Kharagpur India
| | - B.R. Pati
- Department of Microbiology; Vidyasagar University; Midnapore West Bengal India
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Amoroso A, Domine F, Esposito G, Morin S, Savarino J, Nardino M, Montagnoli M, Bonneville JM, Clement JC, Ianniello A, Beine HJ. Microorganisms in dry polar snow are involved in the exchanges of reactive nitrogen species with the atmosphere. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:714-9. [PMID: 20000750 DOI: 10.1021/es9027309] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The snowpack is a complex photochemical reactor that emits a wide variety of reactive molecules to the atmosphere. In particular, the photolysis of nitrate ions, NO(3)(-), produces NO, NO(2), and HONO, which affects the oxidative capacity of the atmosphere. We report measurements in the European High Arctic where we observed for the first time emissions of NO, NO(2), and HONO by the seasonal snowpack in winter, in the complete or near-complete absence of sunlight and in the absence of melting. We also detected unusually high concentrations of nitrite ions, NO(2)(-), in the snow. These results suggest that microbial activity in the snowpack is responsible for the observed emissions. Isotopic analysis of NO(2)(-) and NO(3)(-) in the snow confirm that these ions, at least in part, do not have an atmospheric origin and are most likely produced by the microbial oxidation of NH(4)(+) coming from clay minerals into NO(2)(-) and NO(3)(-). These metabolic pathways also produce NO. Subsequent dark abiotic reactions lead to NO(2) and HONO production. The snow cover is therefore not only an active photochemical reactor but also a biogeochemical reactor active in the cycling of nitrogen and it can affect atmospheric composition all year round.
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