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Meddad-Hamza A, Hamza N, Neffar S, Beddiar A, Gianinazzi S, Chenchouni H. Spatiotemporal variation of arbuscular mycorrhizal fungal colonization in olive (Olea europaea L.) roots across a broad mesic-xeric climatic gradient in North Africa. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 583:176-189. [PMID: 28094046 DOI: 10.1016/j.scitotenv.2017.01.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 01/08/2017] [Accepted: 01/08/2017] [Indexed: 06/06/2023]
Abstract
This study aims to determine the spatiotemporal dynamics of root colonization and spore density of arbuscular mycorrhizal fungi (AMF) in the rhizosphere of olive trees (Olea europaea) with different plantation ages and under different climatic areas in Algeria. Soil and root samples were seasonally collected from three olive plantations of different ages. Other samples were carried out in productive olive orchards cultivated under a climatic gradient (desertic, semi-arid, subhumid, and humid). The olive varieties analysed in this study were Blanquette, Rougette, Chemlel and the wild-olive. Spore density, mycorrhization intensity (M%), spore diversity and the most probable number (MPN) were determined. Both the intensity of mycorrhizal colonization and spore density increased with the increase of seasonal precipitation and decreased with the increase of air temperature regardless of the climatic region or olive variety. The variety Rougette had the highest mycorrhizal levels in all plantation ages and climates. Spore community was composed of the genera Rhizophagus, Funneliformis, Glomus, Septoglomus, Gigaspora, Scutellospora and Entrophospora. The genus Glomus, with four species, predominated in all climate regions. Spores of Gigaspora sp. and Scutellospora sp. were the most abundant in desertic plantations. Statistical models indicated a positive relationship between spore density and M% during spring and winter in young seedlings and old plantations. A significant positive relationship was found between MPN and spore density under different climates. For a mycotrophic species, the rhizosphere of olive trees proved to be poor in mycorrhiza in terms of mycorrhizal colonization and numbers of the infective AMF propagules.
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Affiliation(s)
- Amel Meddad-Hamza
- Laboratoire de Biologie Végétale et Environnement, Department of Biology, Faculty of Sciences, University of Badji Mokhtar, Annaba 23000, Algeria
| | - Nabila Hamza
- Laboratoire de Biologie Végétale et Environnement, Department of Biology, Faculty of Sciences, University of Badji Mokhtar, Annaba 23000, Algeria
| | - Souad Neffar
- Department of Natural and Life Sciences, Faculty of Exact Sciences and Natural and Life Sciences, University of Tebessa, Tebessa 12000, Algeria
| | - Arifa Beddiar
- Laboratoire de Biologie Végétale et Environnement, Department of Biology, Faculty of Sciences, University of Badji Mokhtar, Annaba 23000, Algeria
| | - Silvio Gianinazzi
- INOCULUMplus Technopôle Agro-Environnement RD31, Bretenière 21110, France
| | - Haroun Chenchouni
- Department of Natural and Life Sciences, Faculty of Exact Sciences and Natural and Life Sciences, University of Tebessa, Tebessa 12000, Algeria.
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Liu M, Zheng R, Bai S, Bai YE, Wang J. Slope aspect influences arbuscular mycorrhizal fungus communities in arid ecosystems of the Daqingshan Mountains, Inner Mongolia, North China. MYCORRHIZA 2017; 27:189-200. [PMID: 27838854 DOI: 10.1007/s00572-016-0739-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 10/20/2016] [Indexed: 06/06/2023]
Abstract
Arbuscular mycorrhizal (AM) symbiosis plays an important role in ecosystem functioning, particularly in fragile environments. Little is known, however, about how AM fungus community composition responds to slope aspect. Our objective was to compare the AM fungus communities between sunny and shady slopes and to detect factors that influenced the distributions of AM fungi in arid ecosystems of the Daqingshan Mountains, Inner Mongolia, North China. AM fungus communities were evaluated based on small subunit ribosomal RNA genes (SSUs) using Illumina MiSeq sequencing. AM fungus community composition differed significantly between slope aspects, and sunny slopes had significantly higher AM fungus diversity and richness as well as spore density, total root colonization, arbuscule abundance, vesicle abundance, and hyphal colonization than shady slopes. Structural equation modeling (SEM) illustrated that the effects of slope aspect on AM fungus richness likely were mediated by available phosphorus, soil organic carbon, plant cover, and plant diversity. Available phosphorus was the principal factor that influenced AM fungus species richness, and soil organic carbon was the principal factor influencing spore density and total root colonization, suggesting that these factors especially might be responsible for differences between the AM fungus communities of different slope aspects. These findings elucidate the influence of slope aspect on AM fungus communities and may inform use of AM fungi in protection and restoration of vegetation with different slope aspects in arid ecosystems.
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Affiliation(s)
- Min Liu
- College of Forestry, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China
| | - Rong Zheng
- College of Forestry, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China
- College of Life Science and Technology, Inner Mongolia Normal University, Hohhot, Inner Mongolia, 010020, China
| | - Shulan Bai
- College of Forestry, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China.
| | - Yv E Bai
- College of Forestry, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China
| | - Jugang Wang
- South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Science, Zhanjiang, Guangdong, 524091, China
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Casazza G, Lumini E, Ercole E, Dovana F, Guerrina M, Arnulfo A, Minuto L, Fusconi A, Mucciarelli M. The abundance and diversity of arbuscular mycorrhizal fungi are linked to the soil chemistry of screes and to slope in the Alpic paleo-endemic Berardia subacaulis. PLoS One 2017; 12:e0171866. [PMID: 28192471 PMCID: PMC5305098 DOI: 10.1371/journal.pone.0171866] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 01/26/2017] [Indexed: 01/12/2023] Open
Abstract
Berardia subacaulis Vill. is a monospecific genus that is endemic to the South-western Alps, where it grows on alpine screes, which are extreme habitats characterized by soil disturbance and limiting growth conditions. Root colonization by arbuscular mycorrhizal fungi (AMF) is presumably of great importance in these environments, because of its positive effect on plant nutrition and stress tolerance, as well as on structuring the soil. However, there is currently a lack of information on this topic. In this paper, we tested which soil characteristics and biotic factors could contribute to determining the abundance and community composition of AMF in the roots of B. subacaulis, which had previously been found to be mycorrhizal. For such a reason, the influence of soil properties and environmental factors on AMF abundance and community composition in the roots of B. subacaulis, sampled on three different scree slopes, were analysed through microscopic and molecular analysis. The results have shown that the AMF community of Berardia roots was dominated by Glomeraceae, and included a core of AMF taxa, common to all three scree slopes. The vegetation coverage and dark septate endophytes were not related to the AMF colonization percentage and plant community did not influence the root AMF composition. The abundance of AMF in the roots was related to some chemical (available extractable calcium and potassium) and physical (cation exchange capacity, electrical conductivity and field capacity) properties of the soil, thus suggesting an effect of AMF on improving the soil quality. The non-metric multidimensional scaling (NMDS) ordination of the AMF community composition showed that the diversity of AMF in the various sites was influenced not only by the soil quality, but also by the slope. Therefore, the slope-induced physical disturbance of alpine screes may contribute to the selection of disturbance-tolerant AMF taxa, which in turn may lead to different plant-fungus assemblages.
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Affiliation(s)
| | - Erica Lumini
- Istituto per la Protezione Sostenibile delle Piante–CNR, Viale P.A. Mattioli 25, TORINO, Italy
| | - Enrico Ercole
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
| | - Francesco Dovana
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
| | - Maria Guerrina
- Università di Genova, DISTAV, Corso Europa 26, GENOVA, Italy
| | - Annamaria Arnulfo
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
| | - Luigi Minuto
- Università di Genova, DISTAV, Corso Europa 26, GENOVA, Italy
| | - Anna Fusconi
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
| | - Marco Mucciarelli
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
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Kivlin SN, Muscarella R, Hawkes CV, Treseder KK. The Predictive Power of Ecological Niche Modeling for Global Arbuscular Mycorrhizal Fungal Biogeography. BIOGEOGRAPHY OF MYCORRHIZAL SYMBIOSIS 2017. [DOI: 10.1007/978-3-319-56363-3_7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Rodríguez-Echeverría S, Teixeira H, Correia M, Timóteo S, Heleno R, Öpik M, Moora M. Arbuscular mycorrhizal fungi communities from tropical Africa reveal strong ecological structure. THE NEW PHYTOLOGIST 2017; 213:380-390. [PMID: 27560189 DOI: 10.1111/nph.14122] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 06/28/2016] [Indexed: 06/06/2023]
Abstract
Understanding the distribution and diversity of arbuscular mycorrhizal fungi (AMF) and the rules that govern AMF assemblages has been hampered by a lack of data from natural ecosystems. In addition, the current knowledge on AMF diversity is biased towards temperate ecosystems, whereas little is known about other habitats such as dry tropical ecosystems. We explored the diversity and structure of AMF communities in grasslands, savannas, dry forests and miombo in a protected area under dry tropical climate (Gorongosa National Park, Mozambique) using 454 pyrosequencing. In total, 147 AMF virtual taxa (VT) were detected, including 22 VT new to science. We found a high turnover of AMF with ˂ 12% of VT present in all vegetation types. Forested areas supported more diverse AMF communities than savannas and grassland. Miombo woodlands had the highest AMF richness, number of novel VT, and number of exclusive and indicator taxa. Our data reveal a sharp differentiation of AMF communities between forested areas and periodically flooded savannas and grasslands. This marked ecological structure of AMF communities provides the first comprehensive landscape-scale evidence that, at the background of globally low endemism of AMF, local communities are shaped by regional processes including environmental filtering by edaphic properties and natural disturbance.
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Affiliation(s)
- Susana Rodríguez-Echeverría
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Cda Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Helena Teixeira
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Cda Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Marta Correia
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Cda Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Sérgio Timóteo
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Cda Martim de Freitas, 3000-456, Coimbra, Portugal
- School of Biological Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK
| | - Ruben Heleno
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Cda Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Maarja Öpik
- Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St, 51005, Tartu, Estonia
| | - Mari Moora
- Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St, 51005, Tartu, Estonia
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Williams A, Manoharan L, Rosenstock NP, Olsson PA, Hedlund K. Long-term agricultural fertilization alters arbuscular mycorrhizal fungal community composition and barley (Hordeum vulgare) mycorrhizal carbon and phosphorus exchange. THE NEW PHYTOLOGIST 2017; 213:874-885. [PMID: 27643809 DOI: 10.1111/nph.14196] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 08/08/2016] [Indexed: 05/22/2023]
Abstract
Agricultural fertilization significantly affects arbuscular mycorrhizal fungal (AMF) community composition. However, the functional implications of community shifts are unknown, limiting understanding of the role of AMF in agriculture. We assessed AMF community composition at four sites managed under the same nitrogen (N) and phosphorus (P) fertilizer regimes for 55 yr. We also established a glasshouse experiment with the same soils to investigate AMF-barley (Hordeum vulgare) nutrient exchange, using carbon (13 C) and 33 P isotopic labelling. N fertilization affected AMF community composition, reducing diversity; P had no effect. In the glasshouse, AMF contribution to plant P declined with P fertilization, but was unaffected by N. Barley C allocation to AMF also declined with P fertilization. As N fertilization increased, C allocation to AMF per unit of P exchanged increased. This occurred with and without P fertilization, and was concomitant with reduced barley biomass. AMF community composition showed no relationship with glasshouse experiment results. The results indicate that plants can reduce C allocation to AMF in response to P fertilization. Under N fertilization, plants allocate an increasing amount of C to AMF and receive relatively less P. This suggests an alteration in the terms of P-C exchange under N fertilization regardless of soil P status.
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Affiliation(s)
- Alwyn Williams
- Centre for Environmental and Climate Research, Lund University, Lund, SE-223 62, Sweden
| | | | - Nicholas P Rosenstock
- Centre for Environmental and Climate Research, Lund University, Lund, SE-223 62, Sweden
- Department of Biology, Lund University, Lund, SE-223 62, Sweden
| | - Pål Axel Olsson
- Department of Biology, Lund University, Lund, SE-223 62, Sweden
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57
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Uniting species- and community-oriented approaches to understand arbuscular mycorrhizal fungal diversity. FUNGAL ECOL 2016. [DOI: 10.1016/j.funeco.2016.07.005] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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58
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Xu T, Veresoglou SD, Chen Y, Rillig MC, Xiang D, Ondřej D, Hao Z, Liu L, Deng Y, Hu Y, Chen W, Wang J, He J, Chen B. Plant community, geographic distance and abiotic factors play different roles in predicting AMF biogeography at the regional scale in northern China. ENVIRONMENTAL MICROBIOLOGY REPORTS 2016; 8:1048-1057. [PMID: 27718332 DOI: 10.1111/1758-2229.12485] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Arbuscular mycorrhizal fungi (AMF) are ubiquitous mutualists of terrestrial plants and play key roles in regulating various ecosystem processes, but little is known about AMF biogeography at regional scale. This study aims at exploring the key predictors of AMF communities across a 5000-km transect in northern China. We determined the soil AMF species richness and community composition at 47 sites representative of four vegetation types (meadow steppe, typical steppe, desert steppe and desert) and related them to plant community characteristics, abiotic factors and geographic distance. The results showed that soil pH was the strongest predictor of AMF richness and phylogenetic diversity. However, abiotic factors only have a low predictive effect on AMF community composition or phylogenetic patterns. By contrast, we found a significant relationship between community composition of AMF and plants, which was a surprising result given the extent of heterogeneity in the plant community across this transect. Moreover, the geographic distance predominantly explained the AMF phylogenetic structure, implying that history evolutionary may play a role in shaping AMF biogeographic patterns. This study highlighted the different roles of main factors in predicting AMF biogeography, and bridge landscape-scale studies to more recent global-scale efforts.
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Affiliation(s)
- Tianle Xu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- Collage of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
| | - Stavros D Veresoglou
- Freie Universität Berlin-Institut für Biologie, Dahlem Center of Plant Sciences, Plant Ecology, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany (BIBB)
| | - Yongliang Chen
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany Chinese Academy of Sciences, Beijing, China
| | - Matthias C Rillig
- Freie Universität Berlin-Institut für Biologie, Dahlem Center of Plant Sciences, Plant Ecology, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany (BIBB)
| | - Dan Xiang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- College of Resources and Environment, Qingdao Agricultural University, Qingdao, China
| | - Daniel Ondřej
- Department of Mycorrhizal Symbioses, Institute of Botany Academy of Sciences of the Czech Republic, Průhonice, Czech Republic
| | - Zhipeng Hao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Lei Liu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Ye Deng
- CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Yajun Hu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- Key laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture Chinese Academy of Sciences, Changsha, China
| | - Weiping Chen
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Juntao Wang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Jizheng He
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Baodong Chen
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
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Ciccolini V, Ercoli L, Davison J, Vasar M, Öpik M, Pellegrino E. Land-use intensity and host plant simultaneously shape the composition of arbuscular mycorrhizal fungal communities in a Mediterranean drained peatland. FEMS Microbiol Ecol 2016; 92:fiw186. [PMID: 27604256 DOI: 10.1093/femsec/fiw186] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2016] [Indexed: 12/26/2022] Open
Abstract
Land-use change is known to be a major threat to biodiversity and ecosystem services in Mediterranean areas. However, the potential for different host plants to modulate the effect of land-use intensification on community composition of arbuscular mycorrhizal fungi (AMF) is still poorly understood. To test the hypothesis that low land-use intensity promotes AMF diversity at different taxonomic scales and to determine whether any response is dependent upon host plant species identity, we characterised AMF communities in the roots of 10 plant species across four land use types of differing intensity in a Mediterranean peatland system. AMF were identified using 454 pyrosequencing. This revealed an overall low level of AMF richness in the peaty soils; lowest AMF richness in the intense cropping system at both virtual taxa and family level; strong modulation by the host plant of the impact of land-use intensification on AMF communities at the virtual taxa level; and a significant effect of land-use intensification on AMF communities at the family level. These findings have implications for understanding ecosystem stability and productivity and should be considered when developing soil-improvement strategies in fragile ecosystems, such as Mediterranean peatlands.
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Affiliation(s)
- Valentina Ciccolini
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127, Pisa, Italy
| | - Laura Ercoli
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127, Pisa, Italy
| | - John Davison
- Department of Botany, University of Tartu, 40 Lai Street, 51005 Tartu, Estonia
| | - Martti Vasar
- Department of Botany, University of Tartu, 40 Lai Street, 51005 Tartu, Estonia
| | - Maarja Öpik
- Department of Botany, University of Tartu, 40 Lai Street, 51005 Tartu, Estonia
| | - Elisa Pellegrino
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127, Pisa, Italy
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Liang Y, Pan F, He X, Chen X, Su Y. Effect of vegetation types on soil arbuscular mycorrhizal fungi and nitrogen-fixing bacterial communities in a karst region. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:18482-18491. [PMID: 27287492 DOI: 10.1007/s11356-016-7022-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 05/30/2016] [Indexed: 06/06/2023]
Abstract
Arbuscular mycorrhizal (AM) fungi and nitrogen-fixing bacteria play important roles in plant growth and recovery in degraded ecosystems. The desertification in karst regions has become more severe in recent decades. Evaluation of the fungal and bacterial diversity of such regions during vegetation restoration is required for effective protection and restoration in these regions. Therefore, we analyzed relationships among AM fungi and nitrogen-fixing bacteria abundances, plant species diversity, and soil properties in four typical ecosystems of vegetation restoration (tussock (TK), shrub (SB), secondary forest (SF), and primary forest (PF)) in a karst region of southwest China. Abundance of AM fungi and nitrogen-fixing bacteria, plant species diversity, and soil nutrient levels increased from the tussock to the primary forest. The AM fungus, nitrogen-fixing bacterium, and plant community composition differed significantly between vegetation types (p < 0.05). Plant richness and pH were linked to the community composition of fungi and nitrogen-fixing bacteria, respectively. Available phosphorus, total nitrogen, and soil organic carbon levels and plant richness were positively correlated with the abundance of AM fungi and nitrogen-fixing bacteria (p < 0.05). The results suggested that abundance of AM fungi and nitrogen-fixing bacteria increased from the tussock to the primary forest and highlight the essentiality of these communities for vegetation restoration.
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Affiliation(s)
- Yueming Liang
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan Province, 410125, China
- Institute of Karst Geology, CAGS, Karst Dynamics Laboratory, MLR, Guilin, 541004, China
- Huanjiang Observation and Research Station for Karst Eco-systems, Chinese Academy of Sciences, Huanjiang, 547100, China
| | - Fujing Pan
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan Province, 410125, China
- Huanjiang Observation and Research Station for Karst Eco-systems, Chinese Academy of Sciences, Huanjiang, 547100, China
| | - Xunyang He
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan Province, 410125, China
- Huanjiang Observation and Research Station for Karst Eco-systems, Chinese Academy of Sciences, Huanjiang, 547100, China
| | - Xiangbi Chen
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan Province, 410125, China
- Huanjiang Observation and Research Station for Karst Eco-systems, Chinese Academy of Sciences, Huanjiang, 547100, China
| | - Yirong Su
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan Province, 410125, China.
- Huanjiang Observation and Research Station for Karst Eco-systems, Chinese Academy of Sciences, Huanjiang, 547100, China.
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Xiang D, Veresoglou SD, Rillig MC, Xu T, Li H, Hao Z, Chen B. Relative Importance of Individual Climatic Drivers Shaping Arbuscular Mycorrhizal Fungal Communities. MICROBIAL ECOLOGY 2016; 72:418-427. [PMID: 27117797 DOI: 10.1007/s00248-016-0773-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Accepted: 04/15/2016] [Indexed: 06/05/2023]
Abstract
The physiological tolerance hypothesis (PTH) postulates that it is the tolerance of species to climatic factors that determines overall community richness. Here, we tested whether a group of mutualistic microbes, Glomeromycota, is distributed in semi-arid environments in ways congruent with the PTH. For this purpose, we modeled with climatic predictors the niche of each of the four orders of Glomeromycota and identified predictors of arbuscular mycorrhizal (AM) fungal operational taxonomic unit (OTU) richness. Our dataset consisted of 50 paired grassland and farmland sites in the farming-pastoral ecotone of northern China. We observed shifts in the relative abundance of AM fungal orders in response to climatic variables but also declines in OTU richness in grassland sites that had experienced high precipitation during the preceding year which was incongruous with the PTH. We found pronounced differences across groups of Glomeromycotan fungi in their responses to climatic variables and identified strong dependencies of AM fungal communities on precipitation. Given that precipitation is expected to further decline in the farming-pastoral ecotone over the coming years and that mycorrhiza represents an integral constituent of ecosystem functioning, it is likely that the ecosystem services in the region will change accordingly.
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Affiliation(s)
- Dan Xiang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- College of Resources and Environment, Qingdao Agricultural University, Qingdao, China
| | - Stavros D Veresoglou
- Freie Universität Berlin, Institut für Biologie, 14195, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, 14195, Berlin, Germany
| | - Matthias C Rillig
- Freie Universität Berlin, Institut für Biologie, 14195, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, 14195, Berlin, Germany
| | - Tianle Xu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Huan Li
- College of Resources and Environment, Qingdao Agricultural University, Qingdao, China
| | - Zhipeng Hao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Baodong Chen
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
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Bálint M, Bahram M, Eren AM, Faust K, Fuhrman JA, Lindahl B, O'Hara RB, Öpik M, Sogin ML, Unterseher M, Tedersoo L. Millions of reads, thousands of taxa: microbial community structure and associations analyzed via marker genes. FEMS Microbiol Rev 2016; 40:686-700. [DOI: 10.1093/femsre/fuw017] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/23/2016] [Indexed: 11/13/2022] Open
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Wu F, Wang JT, Yang J, Li J, Zheng YM. Does arsenic play an important role in the soil microbial community around a typical arsenic mining area? ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 213:949-956. [PMID: 27055093 DOI: 10.1016/j.envpol.2016.03.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 03/09/2016] [Accepted: 03/21/2016] [Indexed: 05/27/2023]
Abstract
Arsenic (As) can cause serious hazards to human health, especially in mining areas. Soil bacterial communities, which are critical parts of the soil ecosystem, were analyzed directly for soil environmental factors. As a consequence, it is of great significance to understand the ecological risk of arsenic contamination on bacteria, especially at the local scale. In this study, 33 pairs of soil and grain samples were collected from the corn and paddy fields around an arsenic mining area in Shimen County in Hunan Province, China. Significant differences were found between the soil nitrogen, As concentrations, and bacteria activities among these two types of land use. According to the structural equation model (SEM) analysis, compared with other environmental factors, soil As was not the key factor affecting the bacterial community, even when grain As was beyond the threshold of the national food hygiene standards of China. In the corn field, soil pH was the main factor dominating the bacterial richness, composition and grain As. Meanwhile, in the paddy field the soil total nitrogen (TN) and total carbon (TC) were the main factors impacting the bacterial richness, and the bacterial community composition was mainly affected by pH. The interactions between grain As and soil As were weak in the corn field. The bacterial communities played important roles in the food chain risk of As. The local policy of transforming paddy soil to dry land could greatly reduce the health risk of As through the food chain.
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Affiliation(s)
- Fan Wu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun-Tao Wang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jun Yang
- Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
| | - Jing Li
- Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China
| | - Yuan-Ming Zheng
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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64
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Sun Y, Zhang X, Wu Z, Hu Y, Wu S, Chen B. The molecular diversity of arbuscular mycorrhizal fungi in the arsenic mining impacted sites in Hunan Province of China. J Environ Sci (China) 2016; 39:110-118. [PMID: 26899650 DOI: 10.1016/j.jes.2015.10.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 10/05/2015] [Accepted: 10/06/2015] [Indexed: 06/05/2023]
Abstract
Arbuscular mycorrhizal fungi (AMF) can establish a mutualistic association with most terrestrial plants even in heavy metal contaminated environments. It has been documented that high concentrations of toxic metals, such as arsenic (As) in soil could adversely affect the diversity and function of AMF. However, there are still gaps in understanding the community composition of AMF under long-term As contaminations. In the present study, six sampling sites with different As concentrations were selected in the Realgar mining area in Hunan Province of China. The AMF biodiversity in the rhizosphere soils of the dominant plant species was investigated by sequencing the nuclear small subunit ribosomal RNA (SSU rRNA) gene fragments using 454-pyrosequencing technique. A total of 11 AMF genera were identified, namely Rhizophagus, Glomus, Funneliformis, Acaulospora, Diversispora, Claroideoglomus, Scutellopora, Gigaspora, Ambispora, Praglomus, and Archaeospora, among which Glomus, Rhizophagus, and Claroideoglomus clarodeum were detected in all sampling sites, and Glomus was the dominant AMF genus in the Realgar mining area. Redundancy analysis indicated that soil pH, total As and Cd concentrations were the main factors influencing AMF community structure. There was a negative correlation between the AMF species richness and the total As concentration in the soil, but no significant correlation between the Shannon-Wiener index of the AMF and plants. Our study showed that high As concentrations can exert a selective effect on the AMF populations.
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Affiliation(s)
- Yuqing Sun
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xin Zhang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhaoxiang Wu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yajun Hu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Songlin Wu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Baodong Chen
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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65
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Song F, Pan Z, Bai F, An J, Liu J, Guo W, Bisseling T, Deng X, Xiao S. The Scion/Rootstock Genotypes and Habitats Affect Arbuscular Mycorrhizal Fungal Community in Citrus. Front Microbiol 2015; 6:1372. [PMID: 26648932 PMCID: PMC4664953 DOI: 10.3389/fmicb.2015.01372] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 11/18/2015] [Indexed: 11/25/2022] Open
Abstract
Citrus roots have rare root hairs and thus heavily depend on arbuscular mycorrhizal fungi (AMF) for mineral nutrient uptake. However, the AMF community structure of citrus is largely unknown. By using 454-pyrosequencing of 18S rRNA gene fragment, we investigated the genetic diversity of AMF colonizing citrus roots, and evaluated the impact of habitats and rootstock and scion genotypes on the AMF community structure. Over 7,40,000 effective sequences were obtained from 77 citrus root samples. These sequences were assigned to 75 AMF virtual taxa, of which 66 belong to Glomus, highlighting an absolute dominance of this AMF genus in symbiosis with citrus roots. The citrus AMF community structure is significantly affected by habitats and host genotypes. Interestingly, our data suggests that the genotype of the scion exerts a greater impact on the AMF community structure than that of the rootstock where the physical root-AMF association occurs. This study not only provides a comprehensive assessment for the community composition of the AMF in citrus roots under different conditions, but also sheds novel insights into how the AMF community might be indirectly influenced by the spatially separated yet metabolically connected partner—the scion—of the grafted citrus tree.
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Affiliation(s)
- Fang Song
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Key Laboratory of Horticultural Crop Biology and Genetic Improvement (Central Region, Ministry of Agriculture), College of Horticulture and Forestry Sciences, Huazhong Agricultural University Wuhan, China
| | - Zhiyong Pan
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Key Laboratory of Horticultural Crop Biology and Genetic Improvement (Central Region, Ministry of Agriculture), College of Horticulture and Forestry Sciences, Huazhong Agricultural University Wuhan, China
| | - Fuxi Bai
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Key Laboratory of Horticultural Crop Biology and Genetic Improvement (Central Region, Ministry of Agriculture), College of Horticulture and Forestry Sciences, Huazhong Agricultural University Wuhan, China
| | - Jianyong An
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Key Laboratory of Horticultural Crop Biology and Genetic Improvement (Central Region, Ministry of Agriculture), College of Horticulture and Forestry Sciences, Huazhong Agricultural University Wuhan, China
| | - Jihong Liu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Key Laboratory of Horticultural Crop Biology and Genetic Improvement (Central Region, Ministry of Agriculture), College of Horticulture and Forestry Sciences, Huazhong Agricultural University Wuhan, China
| | - Wenwu Guo
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Key Laboratory of Horticultural Crop Biology and Genetic Improvement (Central Region, Ministry of Agriculture), College of Horticulture and Forestry Sciences, Huazhong Agricultural University Wuhan, China
| | - Ton Bisseling
- Laboratory of Molecular Biology, Department of Plant Sciences, Wageningen University Wageningen, Netherlands
| | - Xiuxin Deng
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Key Laboratory of Horticultural Crop Biology and Genetic Improvement (Central Region, Ministry of Agriculture), College of Horticulture and Forestry Sciences, Huazhong Agricultural University Wuhan, China
| | - Shunyuan Xiao
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Key Laboratory of Horticultural Crop Biology and Genetic Improvement (Central Region, Ministry of Agriculture), College of Horticulture and Forestry Sciences, Huazhong Agricultural University Wuhan, China ; Department of Plant Science and Landscape Architecture, Institute for Bioscience and Biotechnology Research, University of Maryland Rockville, MD, USA
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66
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Li X, Zhang J, Gai J, Cai X, Christie P, Li X. Contribution of arbuscular mycorrhizal fungi of sedges to soil aggregation along an altitudinal alpine grassland gradient on the Tibetan Plateau. Environ Microbiol 2015; 17:2841-57. [DOI: 10.1111/1462-2920.12792] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 01/21/2015] [Accepted: 01/24/2015] [Indexed: 11/26/2022]
Affiliation(s)
- Xiaoliang Li
- College of Resources and Environmental Sciences; China Agricultural University; Beijing 100193 China
| | - Junling Zhang
- College of Resources and Environmental Sciences; China Agricultural University; Beijing 100193 China
| | - Jingping Gai
- College of Resources and Environmental Sciences; China Agricultural University; Beijing 100193 China
| | - Xiaobu Cai
- Tibet Agricultural and Animal Husbandry College; Tibet University; Linzhi 860000 China
| | - Peter Christie
- College of Resources and Environmental Sciences; China Agricultural University; Beijing 100193 China
| | - Xiaolin Li
- College of Resources and Environmental Sciences; China Agricultural University; Beijing 100193 China
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Dickie IA, Alexander I, Lennon S, Öpik M, Selosse MA, van der Heijden MGA, Martin FM. Evolving insights to understanding mycorrhizas. THE NEW PHYTOLOGIST 2015; 205:1369-1374. [PMID: 25645714 DOI: 10.1111/nph.13290] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Affiliation(s)
- Ian A Dickie
- Bio-Protection Research Centre, Lincoln University, PO Box 85084, Lincoln, 7647, New Zealand
| | - Ian Alexander
- School of Biological Sciences, University of Aberdeen, Cruickshank Building, Aberdeen, AB24 3UU, UK
| | - Sarah Lennon
- New Phytologist Central Office, Lancaster University, Bailrigg House, Lancaster, LA1 4YE, UK
| | - Maarja Öpik
- Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St, 51005, Tartu, Estonia
| | - Marc-André Selosse
- Département Systématique et Evolution, Muséum national d'Histoire naturelle, UMR 7205 ISYEB CP 50 45 rue Buffon, Paris, 75005, France
| | | | - Francis M Martin
- Lab of Excellence ARBRE, INRA, UMR 1136 INRA-Université de Lorraine 'Interactions Arbres/Micro-organismes', 54280, Champenoux, France
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68
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van Geel M, Ceustermans A, van Hemelrijck W, Lievens B, Honnay O. Decrease in diversity and changes in community composition of arbuscular mycorrhizal fungi in roots of apple trees with increasing orchard management intensity across a regional scale. Mol Ecol 2015; 24:941-52. [PMID: 25586038 DOI: 10.1111/mec.13079] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 01/07/2015] [Accepted: 01/12/2015] [Indexed: 11/30/2022]
Abstract
Understanding which factors drive the diversity and community composition of arbuscular mycorrhizal fungi (AMF) is important due to the role of these soil micro-organisms in ecosystem functioning and current environmental threats to AMF biodiversity. Additionally, in agro-ecosystems, this knowledge may help to evaluate their use in making agriculture more sustainable. Here, we used 454-pyrosequencing of small subunit rRNA gene amplicons to quantify AMF diversity and community composition in the roots of cultivated apple trees across 24 orchards in central Belgium. We aimed at identifying the factors (soil chemical variables, organic vs. conventional farming, and geographical location) that affect AMF diversity and community composition. In total, 110 AMF OTUs were detected, of which the majority belonged to the Glomeraceae (73%) and the Claroideoglomeraceae (19%). We show that soil characteristics and farming system, rather than the geographical location of the orchards, shape AMF communities on apple trees. Particularly, plant-available P content of the soil was associated with lower AMF diversity. In orchards with a lower plant-available P content of the soil (P < 100 mg/kg soil), we also found a significantly higher AMF diversity in organically managed orchards as compared to conventionally managed orchards. Finally, the degree of nestedness of the AMF communities was related to plant-available P and N content of the soil, pointing at a progressive loss of AMF taxa with increasing fertilization. Overall, we conclude that a combination of organic orchard management and moderate fertilization may preserve diverse AMF communities on apple trees and that AMF in the roots of apple trees appear not to be dispersal limited at the scale of central Belgium.
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Affiliation(s)
- Maarten van Geel
- Plant Conservation and Population Biology, Department of Biology, KU Leuven, Kasteelpark Arenberg 31, Heverlee, B-3001, Belgium
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69
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Higo M, Isobe K, Matsuda Y, Ichida M, Torigoe Y. Influence of Sowing Season and Host Crop Identity on the Community Structure of Arbuscular Mycorrhizal Fungi Colonizing Roots of Two Different Gramineous and Leguminous Crop Species. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/aim.2015.52011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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