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Yiallouris A, Pana ZD, Marangos G, Tzyrka I, Karanasios S, Georgiou I, Kontopyrgia K, Triantafyllou E, Seidel D, Cornely OA, Johnson EO, Panagiotou S, Filippou C. Fungal diversity in the soil Mycobiome: Implications for ONE health. One Health 2024; 18:100720. [PMID: 38699438 PMCID: PMC11064618 DOI: 10.1016/j.onehlt.2024.100720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 04/02/2024] [Indexed: 05/05/2024] Open
Abstract
Today, over 300 million individuals worldwide are afflicted by severe fungal infections, many of whom will perish. Fungi, as a result of their plastic genomes have the ability to adapt to new environments and extreme conditions as a consequence of globalization, including urbanization, agricultural intensification, and, notably, climate change. Soils and the impact of these anthropogenic environmental factors can be the source of pathogenic and non-pathogenic fungi and subsequent fungal threats to public health. This underscores the growing understanding that not only is fungal diversity in the soil mycobiome a critical component of a functioning ecosystem, but also that soil microbial communities can significantly contribute to plant, animal, and human health, as underscored by the One Health concept. Collectively, this stresses the importance of investigating the soil microbiome in order to gain a deeper understanding of soil fungal ecology and its interplay with the rhizosphere microbiome, which carries significant implications for human health, animal health and environmental health.
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Affiliation(s)
- Andreas Yiallouris
- School of Medicine, European University, Cyprus
- Medical innovation center (MEDIC), School of Medicine, European University, Cyprus
| | - Zoi D. Pana
- School of Medicine, European University, Cyprus
- Medical innovation center (MEDIC), School of Medicine, European University, Cyprus
| | | | | | | | | | | | | | - Danila Seidel
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Translational Research, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), Cologne, Germany
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) and Excellence Center for Medical Mycology (ECMM), Cologne, Germany
- German Centre for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Oliver A. Cornely
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Translational Research, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), Cologne, Germany
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) and Excellence Center for Medical Mycology (ECMM), Cologne, Germany
- German Centre for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Elizabeth O. Johnson
- School of Medicine, European University, Cyprus
- Medical innovation center (MEDIC), School of Medicine, European University, Cyprus
| | - Stavros Panagiotou
- School of Medicine, European University, Cyprus
- Division of Medical Education, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester
| | - Charalampos Filippou
- School of Medicine, European University, Cyprus
- Medical innovation center (MEDIC), School of Medicine, European University, Cyprus
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Xue P, Minasny B, Wadoux AMJC, Dobarco MR, McBratney A, Bissett A, de Caritat P. Drivers and human impacts on topsoil bacterial and fungal community biogeography across Australia. GLOBAL CHANGE BIOLOGY 2024; 30:e17216. [PMID: 38429628 DOI: 10.1111/gcb.17216] [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: 11/12/2023] [Revised: 02/05/2024] [Accepted: 02/17/2024] [Indexed: 03/03/2024]
Abstract
Soil microbial diversity mediates a wide range of key processes and ecosystem services influencing planetary health. Our knowledge of microbial biogeography patterns, spatial drivers and human impacts at the continental scale remains limited. Here, we reveal the drivers of bacterial and fungal community distribution in Australian topsoils using 1384 soil samples from diverse bioregions. Our findings highlight that climate factors, particularly precipitation and temperature, along with soil properties, are the primary drivers of topsoil microbial biogeography. Using random forest machine-learning models, we generated high-resolution maps of soil bacteria and fungi across continental Australia. The maps revealed microbial hotspots, for example, the eastern coast, southeastern coast, and west coast were dominated by Proteobacteria and Acidobacteria. Fungal distribution is strongly influenced by precipitation, with Ascomycota dominating the central region. This study also demonstrated the impact of human modification on the underground microbial community at the continental scale, which significantly increased the relative abundance of Proteobacteria and Ascomycota, but decreased Chloroflexi and Basidiomycota. The variations in microbial phyla could be attributed to distinct responses to altered environmental factors after human modifications. This study provides insights into the biogeography of soil microbiota, valuable for regional soil biodiversity assessments and monitoring microbial responses to global changes.
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Affiliation(s)
- Peipei Xue
- The University of Sydney, Sydney, New South Wales, Australia
| | - Budiman Minasny
- The University of Sydney, Sydney, New South Wales, Australia
| | - Alexandre M J-C Wadoux
- LISAH, University of Montpellier, AgroParisTech, INRAE, IRD, L'Institut Agro, Montpellier, France
| | | | - Alex McBratney
- The University of Sydney, Sydney, New South Wales, Australia
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Bai X, Zhang E, Wu J, Ma D, Zhang C, Zhang B, Liu Y, Zhang Z, Tian F, Zhao H, Wang B. Soil fungal community is more sensitive than bacterial community to modified materials application in saline-alkali land of Hetao Plain. Front Microbiol 2024; 15:1255536. [PMID: 38374915 PMCID: PMC10875129 DOI: 10.3389/fmicb.2024.1255536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 01/04/2024] [Indexed: 02/21/2024] Open
Abstract
Soil salinization has become a major challenge that severely threatens crop growth and influences the productivity of agriculture. It is urgent to develop effective management measures to improve saline-alkali soil. Thus, in this study, soil properties, microbial communities, and function under desulfurization gypsum (DE), soil amendment (SA), farm manure (FA), and co-application of desulfurization gypsum, soil amendment, and farm manure (TA) in a field experiment were examined by high-throughput sequencing. The results showed that the application of modified materials is an effective approach in improving saline-alkali soil, especially TA treatment significantly increased the content of available phosphorus (AP), available potassium (AK), soil organic matter (SOM), and alkaline hydrolysis nitrogen (AHN) and decreased pH, bulk density (BD), and electrical conductivity (EC). The application of modified materials resulted in notable enhancement in fungal diversity and altered the composition and structure of the fungal community. Conversely, the effect on the bacterial community was comparatively minor, with changes limited to the structure of the community. Regarding the fungal community composition, Ascomycota, Mortierellomycota, and Basidiomycota emerged as the dominant phyla across all treatments. At each taxonomic level, the community composition exhibited significant variations in response to different modified materials, resulting in divergent soil quality. The TA treatment led to a decrease in Mortierellomycota and an increase in Ascomycota, potentially enhancing the ability to decompose organic matter and facilitate soil nutrient cycling. Additionally, the sensitivity of fungal biomarkers to modified materials surpassed that of the bacterial community. The impact of modified materials on soil microbial communities primarily stemmed from alterations in soil EC, AP, AK, and SOM. FUNGuild analysis indicated that the saprotroph trophic mode group was the dominant component, and the application of modified materials notably increased the symbiotroph group. PICRUSt analysis revealed that metabolism was the most prevalent functional module observed at pathway level 1. Overall, the application of modified materials led to a decrease in soil EC and an increase in nutrient levels, resulting in more significant alterations in the soil fungal community, but it did not dramatically change the soil bacterial community. Our study provides new insights into the application of modified materials in increasing soil nutrients and altering soil microbial communities and functions and provides a better approach for improving saline-alkali soil of Hetao Plain.
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Affiliation(s)
- Xiaolong Bai
- College of Agriculture, Ningxia University, Yinchuan, China
| | - En Zhang
- College of Agriculture, Ningxia University, Yinchuan, China
| | - Jinmin Wu
- College of Agriculture, Ningxia University, Yinchuan, China
| | - Donghai Ma
- College of Agriculture, Ningxia University, Yinchuan, China
| | - Chaohui Zhang
- College of Agriculture, Ningxia University, Yinchuan, China
| | - Bangyan Zhang
- College of Agriculture, Ningxia University, Yinchuan, China
| | - Yunpeng Liu
- College of Agriculture, Ningxia University, Yinchuan, China
| | - Zhi Zhang
- College of Agriculture, Ningxia University, Yinchuan, China
| | - Feng Tian
- Tumote Right Banner Agricultural Technology Extension Center, Baotou, China
| | - Hui Zhao
- Tumote Right Banner Agricultural Technology Extension Center, Baotou, China
| | - Bin Wang
- College of Agriculture, Ningxia University, Yinchuan, China
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Kruczyńska A, Kuźniar A, Banach A, Jurczyk S, Podlewski J, Słomczewski A, Marzec-Grządziel A, Sochaczewska A, Gałązka A, Wolińska A. Changes in the mycobiome structure in response to reduced nitrogen fertilization in two cropping systems of maize. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166343. [PMID: 37591379 DOI: 10.1016/j.scitotenv.2023.166343] [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: 05/29/2023] [Revised: 08/13/2023] [Accepted: 08/14/2023] [Indexed: 08/19/2023]
Abstract
Nitrogen (N) is an essential element for plant productivity; hence, it is abundantly applied to the soil in the form of organic or chemical fertilizers, which consequently have a negative impact on the environment. Therefore, the main objective of our study was to investigate the structure and richness of the soil mycobiome in response to reduced nitrogen fertilization under two cropping systems: plowing (P) and no-till (NT). Moreover, the scope of the study perfectly falls into the EU "From Field to Table" strategy, which recommends a 20 % reduction of nitrogen fertilization of agricultural soils by 2030. In our study, the samples were collected twice during a single growing season: before maize sowing (without fertilization) and after harvesting the crop (four different fertilization rates). The mycobiome structure was identified based on the next generation sequencing (NGS) technique. Overall, our research has proved that the cropping system is important in terms of the formation of the fungal mycobiome structure and relative abundance. In addition, we confirmed that soil properties have a significant impact on fungal communities. We determined that a 20 % lower nitrogen fertilization rate (92.0 kg N ha-1) had a positive effect on the abundance of fungal communities. Moreover, the highest biodiversity at each of the taxonomic levels tested (phylum, class, genus) in the NT system and at the class and genus levels in the P system was also evidenced at the 20 % lower N fertilization rate. We also recommended potential indicators confirming the positive impact of reduced fertilization in two cropping systems: plowing - Epicoccum, Metarhizium, Mycosphaerella, and Paraconiothyrium and no-till - Peziza, Podospora, Metarhizium, Trechispora, and Umbelopsis.
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Affiliation(s)
- Anna Kruczyńska
- Department of Biology and Biotechnology of Microorganisms, The John Paul II Catholic University of Lublin, Konstantynów 1 I Str., Lublin, Poland.
| | - Agnieszka Kuźniar
- Department of Biology and Biotechnology of Microorganisms, The John Paul II Catholic University of Lublin, Konstantynów 1 I Str., Lublin, Poland.
| | - Artur Banach
- Department of Biology and Biotechnology of Microorganisms, The John Paul II Catholic University of Lublin, Konstantynów 1 I Str., Lublin, Poland.
| | - Sara Jurczyk
- Department of Artificial Intelligence, The John Paul II Catholic University of Lublin, Konstantynów 1 H Str., Lublin, Poland.
| | - Jacek Podlewski
- Potulicka Foundation Economic Center, Wojnowo 5, Sicienko, Poland.
| | | | - Anna Marzec-Grządziel
- Institute of Soil Science and Plant Cultivation, Department of Agriculture Microbiology, Czartoryskich 8 Str., 24-100 Puławy, Poland.
| | - Anna Sochaczewska
- Department of Biology and Biotechnology of Microorganisms, The John Paul II Catholic University of Lublin, Konstantynów 1 I Str., Lublin, Poland.
| | - Anna Gałązka
- Institute of Soil Science and Plant Cultivation, Department of Agriculture Microbiology, Czartoryskich 8 Str., 24-100 Puławy, Poland.
| | - Agnieszka Wolińska
- Department of Biology and Biotechnology of Microorganisms, The John Paul II Catholic University of Lublin, Konstantynów 1 I Str., Lublin, Poland.
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Chen X, Li Q, Chen D, Zhao L, Xiao C. Restoration Measures of Fencing after Tilling Guided Succession of Grassland Soil Microbial Community Structure to Natural Grassland in the Sanjiangyuan Agro-pasture Ecotone of the Qinghai-Tibetan Plateau. MICROBIAL ECOLOGY 2023; 86:2870-2881. [PMID: 37620628 DOI: 10.1007/s00248-023-02287-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 08/11/2023] [Indexed: 08/26/2023]
Abstract
In the fragile Sanjiangyuan (SJY) agro-pasture ecotone of the Qinghai-Tibetan Plateau (QTP), planting and fencing have been used to alleviate grassland degradation and to provide high-quality grass seeds for the implementation of the project of "grain for green". The soil microbe is the major driving factor in maintaining plant productivity and soil nutrient cycling. However, few studies have explored the effects of planting and fencing on soil microorganisms in the SJY agro-pasture ecotone. We explored the effects of tilling (TG) and fencing after tilling (FTG) on soil microbial communities to reveal the effects of restoration measures on soil microbes and to provide a reference in assessing and improving ecosystem structure. The results showed that restoration measures increased soil microbial species diversity and significantly changed their community structure. We found, the microbial composition was more complex under FTG, and its fungal variability was higher and more similar to that of natural grassland. Additionally, restoration measures resulted in fungal co-occurrence network was more edges, higher density, larger diameter and more positive interactions. This was due to the management of the vegetation-soil microenvironment by FTG inducing a differentiation of microbial community structure. In summary, the implementation of FTG could change the microenvironment in the SJY agro-pasture ecotone, so that variation in the structure of microbial community tended toward that of natural grassland, and increased the stability of microbial co-occurrence network, which was more obvious in the fungal community. HIGHLIGHTS: • Restoration measures have changed the vegetation characteristics and soil microenvironment. • Fencing after tilling (FTG) has brought the microenvironment closer to natural grassland. • FTG significantly increased microbial unique ASVs. The number of fungal unique ASVs was similar to that of natural grassland. • FTG resulted in changes in microbial community structure towards natural grasslands and increased the stability of the microbial co-occurrence network, which was more apparent in the fungal community.
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Affiliation(s)
- Xin Chen
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China
| | - Qi Li
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
| | - Dongdong Chen
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
| | - Liang Zhao
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China.
| | - Chunwang Xiao
- College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, China.
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Kenmotsu H, Masuma T, Murakami J, Hirose Y, Eki T. Distinct prokaryotic and eukaryotic communities and networks in two agricultural fields of central Japan with different histories of maize-cabbage rotation. Sci Rep 2023; 13:15435. [PMID: 37723228 PMCID: PMC10507100 DOI: 10.1038/s41598-023-42291-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 09/07/2023] [Indexed: 09/20/2023] Open
Abstract
Crop rotation is an important agricultural practice for homeostatic crop cultivation. Here, we applied high-throughput sequencing of ribosomal RNA gene amplicons to investigate soil biota in two fields of central Japan with different histories of maize-cabbage rotation. We identified 3086 eukaryotic and 17,069 prokaryotic sequence variants (SVs) from soil samples from two fields rotating two crops at three different growth stages. The eukaryotic and prokaryotic communities in the four sample groups of two crops and two fields were clearly distinguished using β-diversity analysis. Redundancy analysis showed the relationships of the communities in the fields to pH and nutrient, humus, and/or water content. The complexity of eukaryotic and prokaryotic networks was apparently higher in the cabbage-cultivated soils than those in the maize-cultivated soils. The node SVs (nSVs) of the networks were mainly derived from two eukaryotic phyla: Ascomycota and Cercozoa, and four prokaryotic phyla: Pseudomonadota, Acidobacteriota, Actinomycetota, and Gemmatimonadota. The networks were complexed by cropping from maize to cabbage, suggesting the formation of a flexible network under crop rotation. Ten out of the 16 eukaryotic nSVs were specifically found in the cabbage-cultivated soils were derived from protists, indicating the potential contribution of protists to the formation of complex eukaryotic networks.
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Affiliation(s)
- Harutaro Kenmotsu
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi, 441-8580, Japan
| | - Tomoro Masuma
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi, 441-8580, Japan
| | - Junya Murakami
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi, 441-8580, Japan
| | - Yuu Hirose
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi, 441-8580, Japan
- Research Center for Agrotechnology and Biotechnology, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi, 441-8580, Japan
| | - Toshihiko Eki
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi, 441-8580, Japan.
- Research Center for Agrotechnology and Biotechnology, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi, 441-8580, Japan.
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7
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Liu Z, Zhuang J, Zheng K, Luo C. Differential response of the soil nutrients, soil bacterial community structure and metabolic functions to different risk areas in Lead-Zine tailings. Front Microbiol 2023; 14:1131770. [PMID: 37779699 PMCID: PMC10536257 DOI: 10.3389/fmicb.2023.1131770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 08/17/2023] [Indexed: 10/03/2023] Open
Abstract
Rapid growth in the mining industry has brought about a large formation of tailings, which result in serious destruction of the ecological environment and severe soil pollution problems. This study assesses soil nutrients, soil bacterial community and soil microbes' metabolic function in heavily polluted areas (W1), moderately polluted areas (W2), lightly polluted areas (W3) and clean areas (CK) using 16S Illumina sequencing. The results of this study showed that compared with CK, a severe loss of soil nutrients and richness of OTUs (Chao1 and ACE indices) were observed with the aggravated pollution of tailings. The Chao1 and ACE indices in the W1 group decreased significantly by 15.53 and 16.03%, respectively, (p < 0.01). Besides, the relative abundance of Actinobacteria and Proteobacteria was high whereas and relative abundance of Chloroflexi in the polluted areas. Among them, W1 groups increased significantly the relative abundance of Actinobacteria and decreased significantly the relative abundance of Chloroflexi, these can be used as indicator phyla for changes in soil community structures under polluted stress. Tax4 Fun analysis showed that W1 groups affected the soil bacterial community and altered the primary types of biological metabolism in polluted areas. Tailings have adverse impacts on soil bacterial community and metabolic functions, and the deterioration in soil quality is dependent on the levels of tailings pollution. Cumulatively, this study provides valuable information on the bacterial community structure and metabolic functions in the tailing polluted soil.
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Affiliation(s)
| | - Jiayao Zhuang
- Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Nanjing Forestry University, Nanjing, China
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Romano I, Bodenhausen N, Basch G, Soares M, Faist H, Trognitz F, Sessitsch A, Doubell M, Declerck S, Symanczik S. Impact of conservation tillage on wheat performance and its microbiome. FRONTIERS IN PLANT SCIENCE 2023; 14:1211758. [PMID: 37670872 PMCID: PMC10475739 DOI: 10.3389/fpls.2023.1211758] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 07/25/2023] [Indexed: 09/07/2023]
Abstract
Winter wheat is an important cereal consumed worldwide. However, current management practices involving chemical fertilizers, irrigation, and intensive tillage may have negative impacts on the environment. Conservation agriculture is often presented as a sustainable alternative to maintain wheat production, favoring the beneficial microbiome. Here, we evaluated the impact of different water regimes (rainfed and irrigated), fertilization levels (half and full fertilization), and tillage practices (occasional tillage and no-tillage) on wheat performance, microbial activity, and rhizosphere- and root-associated microbial communities of four winter wheat genotypes (Antequera, Allez-y, Apache, and Cellule) grown in a field experiment. Wheat performance (i.e., yield, plant nitrogen concentrations, and total nitrogen uptake) was mainly affected by irrigation, fertilization, and genotype, whereas microbial activity (i.e., protease and alkaline phosphatase activities) was affected by irrigation. Amplicon sequencing data revealed that habitat (rhizosphere vs. root) was the main factor shaping microbial communities and confirmed that the selection of endophytic microbial communities takes place thanks to specific plant-microbiome interactions. Among the experimental factors applied, the interaction of irrigation and tillage influenced rhizosphere- and root-associated microbiomes. The findings presented in this work make it possible to link agricultural practices to microbial communities, paving the way for better monitoring of these microorganisms in the context of agroecosystem sustainability.
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Affiliation(s)
- Ida Romano
- Department of Agricultural Sciences, Division of Microbiology, University of Naples Federico II, Naples, Italy
| | - Natacha Bodenhausen
- Department of Soil Sciences, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland
| | - Gottlieb Basch
- MED – Mediterranean Institute for Agriculture, Environment and Development, University of Évora, Évora, Portugal
| | - Miguel Soares
- MED – Mediterranean Institute for Agriculture, Environment and Development, University of Évora, Évora, Portugal
| | - Hanna Faist
- AIT Austrian Institute of Technology, Tulln, Austria
| | | | | | - Marcé Doubell
- Mycology, Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Stéphane Declerck
- Mycology, Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Sarah Symanczik
- Department of Soil Sciences, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland
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Gahagan AC, Shi Y, Radford D, Morrison MJ, Gregorich E, Aris-Brosou S, Chen W. Long-Term Tillage and Crop Rotation Regimes Reshape Soil-Borne Oomycete Communities in Soybean, Corn, and Wheat Production Systems. PLANTS (BASEL, SWITZERLAND) 2023; 12:2338. [PMID: 37375963 DOI: 10.3390/plants12122338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/12/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023]
Abstract
Soil-borne oomycetes include devastating plant pathogens that cause substantial losses in the agricultural sector. To better manage this important group of pathogens, it is critical to understand how they respond to common agricultural practices, such as tillage and crop rotation. Here, a long-term field experiment was established using a split-plot design with tillage as the main plot factor (conventional tillage (CT) vs. no till (NT), two levels) and rotation as the subplot factor (monocultures of soybean, corn, or wheat, and corn-soybean-wheat rotation, four levels). Post-harvest soil oomycete communities were characterized over three consecutive years (2016-2018) by metabarcoding the Internal Transcribed Spacer 1 (ITS1) region. The community contained 292 amplicon sequence variants (ASVs) and was dominated by Globisporangium spp. (85.1% in abundance, 203 ASV) and Pythium spp. (10.4%, 51 ASV). NT decreased diversity and community compositional structure heterogeneity, while crop rotation only affected the community structure under CT. The interaction effects of tillage and rotation on most oomycetes species accentuated the complexity of managing these pathogens. Soil and crop health represented by soybean seedling vitality was lowest in soils under CT cultivating soybean or corn, while the grain yield of the three crops responded differently to tillage and crop rotation regimes.
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Affiliation(s)
- Alison Claire Gahagan
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Ave., Ottawa, ON K1A 0C6, Canada
- Department of Biology, University of Ottawa, 60 Marie Curie Prv., Ottawa, ON K1N 6N5, Canada
| | - Yichao Shi
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Ave., Ottawa, ON K1A 0C6, Canada
| | - Devon Radford
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Ave., Ottawa, ON K1A 0C6, Canada
| | - Malcolm J Morrison
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Ave., Ottawa, ON K1A 0C6, Canada
| | - Edward Gregorich
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Ave., Ottawa, ON K1A 0C6, Canada
| | - Stéphane Aris-Brosou
- Department of Biology, University of Ottawa, 60 Marie Curie Prv., Ottawa, ON K1N 6N5, Canada
| | - Wen Chen
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Ave., Ottawa, ON K1A 0C6, Canada
- Department of Biology, University of Ottawa, 60 Marie Curie Prv., Ottawa, ON K1N 6N5, Canada
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Singh I, Hussain M, Manjunath G, Chandra N, Ravikanth G. Regenerative agriculture augments bacterial community structure for a healthier soil and agriculture. FRONTIERS IN AGRONOMY 2023; 5:1134514. [PMID: 39071943 PMCID: PMC7616306 DOI: 10.3389/fagro.2023.1134514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Introduction Use of chemical fertilization and pesticides not only harm the environment but also have detrimental consequences on human health. In recent years, there has been a major emphasis worldwide on natural agriculture methods. Regenerative agriculture is known across the world as a combination of nature-friendly farming practices such as no-till, cover cropping, crop-rotation, agroforestry and use of organic home-based/farm-based ingredients to revive soil health. In India, a number of farmers are slowly adopting these practices using home-based mixtures and farmyard manure for soil rejuvenation and pest management. In order to evaluate the efficacy of the regenerative agriculture practices, this study compared conventional and regenerative agriculture plots for their soil bacterial and nutrient profiles. Methods Two crops - ragi (Finger millet, an old world cereal eaten in India) and vegetable (tomato/beans), and different lengths (≤3 and >5 years) of regenerative practices were additional metrics considered to understand variabilities due to crop-type and period of application. The common regenerative agriculture practices used by farmers in this study included a mix of practices such as mulching, minimal-till, inter-cropping, crop-rotation, along with application of farmyard manure and other home-based concoctions rich in nutrients and microbes for enriching the soil. Results We found that all regenerative practices were effective in bringing about an enrichment for soil bacteria with a more heterogeneous composition. Additionally, in regenerative vegetable (RV) versus conventional vegetable (CV) and barren land (BL) plots the relative percentage abundance of Actinobacteriota (RV-7.47%/ CV-6.24%/BL -7.02%) and Chloroflexi (RV-9.37%/ CV-6.63%/BL-8.75%) was slightly higher. In contrast, levels of Acidobacteriota (RV-8.1%/ CV-9.88%/BL-9.62%) was significantly lower. Similarly, regenerative ragi (RR) in comparison with conventional ragi (CR) and barren land (BL) plots saw higher representation of Firmicutes (RR-5.45%/ CR-2.38%/BL-1.45%) and Actinobacteriota (RR-11.53%/ CR-7.08%/BL-7.15%) and a concurrent reduction in Acidobacteriota (RR-6.91%/CR-7.39%/ BL-9.79%). The RV plots were found to be enriched for Plant Growth Promoting Rhizobacteria (PGPRs) - Pseudomonas sp. (RV-0.51%/CV-0.01%/BL-0.21%), and RR plots were enriched for Bacillus sp. (RR-1.35%/CR-0.95%/BL-0.61%), and Mesorhizobium sp. (0.30%/0.12%/0.21%), which are known to play significant roles in vegetable and ragi growth respectively. Discussion Interestingly, long-term regenerative agriculture was able to support good nutrient composition while enhancing Soil Organic Carbon (SOC) levels. In all, the regenerative agriculture practices were found to be effective in improving bacterial community structure and simultaneously improving soil health. We found that BL soil with eucalyptus plantation showed among the least bacterial diversity suggesting detrimental impact on soil health.
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Affiliation(s)
- Indira Singh
- Ashoka Trust for Research in Ecology and the Environment, Bangalore, India
| | | | - G. Manjunath
- Ashoka Trust for Research in Ecology and the Environment, Bangalore, India
| | | | - G. Ravikanth
- Ashoka Trust for Research in Ecology and the Environment, Bangalore, India
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Chertkova E, Kabilov MR, Yaroslavtseva O, Polenogova O, Kosman E, Sidorenko D, Alikina T, Noskov Y, Krivopalov A, Glupov VV, Kryukov VY. Links between Soil Bacteriobiomes and Fungistasis toward Fungi Infecting the Colorado Potato Beetle. Microorganisms 2023; 11:microorganisms11040943. [PMID: 37110366 PMCID: PMC10141481 DOI: 10.3390/microorganisms11040943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/02/2023] [Accepted: 04/02/2023] [Indexed: 04/07/2023] Open
Abstract
Entomopathogenic fungi can be inhibited by different soil microorganisms, but the effect of a soil microbiota on fungal growth, survival, and infectivity toward insects is insufficiently understood. We investigated the level of fungistasis toward Metarhizium robertsii and Beauveria bassiana in soils of conventional potato fields and kitchen potato gardens. Agar diffusion methods, 16S rDNA metabarcoding, bacterial DNA quantification, and assays of Leptinotarsa decemlineata survival in soils inoculated with fungal conidia were used. Soils of kitchen gardens showed stronger fungistasis toward M. robertsii and B. bassiana and at the same time the highest density of the fungi compared to soils of conventional fields. The fungistasis level depended on the quantity of bacterial DNA and relative abundance of Bacillus, Streptomyces, and some Proteobacteria, whose abundance levels were the highest in kitchen garden soils. Cultivable isolates of bacilli exhibited antagonism to both fungi in vitro. Assays involving inoculation of nonsterile soils with B. bassiana conidia showed trends toward elevated mortality of L. decemlineata in highly fungistatic soils compared to low-fungistasis ones. Introduction of antagonistic bacilli into sterile soil did not significantly change infectivity of B. bassiana toward the insect. The results support the idea that entomopathogenic fungi can infect insects within a hypogean habitat despite high abundance and diversity of soil antagonistic bacteria.
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Affiliation(s)
- Ekaterina Chertkova
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630091, Russia
| | - Marsel R. Kabilov
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Olga Yaroslavtseva
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630091, Russia
| | - Olga Polenogova
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630091, Russia
| | - Elena Kosman
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630091, Russia
| | - Darya Sidorenko
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630091, Russia
| | - Tatyana Alikina
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Yury Noskov
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630091, Russia
| | - Anton Krivopalov
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630091, Russia
| | - Viktor V. Glupov
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630091, Russia
| | - Vadim Yu. Kryukov
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630091, Russia
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Li X, Skillman V, Dung J, Frost K. Legacy effects of fumigation on soil bacterial and fungal communities and their response to metam sodium application. ENVIRONMENTAL MICROBIOME 2022; 17:59. [PMID: 36461097 PMCID: PMC9719244 DOI: 10.1186/s40793-022-00454-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Soil microorganisms are integral to maintaining soil health and crop productivity, but fumigation used to suppress soilborne diseases may affect soil microbiota. Currently, little is known about the legacy effects of soil fumigation on soil microbial communities and their response to fumigation at the production scale. Here, 16S rRNA gene and internal transcribed spacer amplicon sequencing was used to characterize the bacterial and fungal communities in soils from intensively managed crop fields with and without previous exposure to metam sodium (MS) fumigation. The effect of fumigation history, soil series, and rotation crop diversity on microbial community variation was estimated and the response of the soil microbiome to MS application in an open microcosm system was documented. RESULTS We found that previous MS fumigation reduced soil bacterial diversity but did not affect microbial richness and fungal diversity. Fumigation history, soil series, and rotation crop diversity were the main contributors to the variation in microbial β-diversity. Between fumigated and non-fumigated soils, predominant bacterial and fungal taxa were similar; however, their relative abundance varied with fumigation history. In particular, the abundance of Basidiomycete yeasts was decreased in fumigated soils. MS fumigation also altered soil bacterial and fungal co-occurrence network structure and associations. In microcosms, application of MS reduced soil microbial richness and bacterial diversity. Soil microbial β-diversity was also affected but microbial communities of the microcosm soils were always similar to that of the field soils used to establish the microcosms. MS application also induced changes in relative abundance of several predominant bacterial and fungal genera based on a soil's previous fumigation exposure. CONCLUSIONS The legacy effects of MS fumigation are more pronounced on soil bacterial diversity, β-diversity and networks. Repeated fumigant applications shift soil microbial compositions and may contribute to differential MS sensitivity among soil microorganisms. Following MS application, microbial richness and bacterial diversity decreases, but microbial β-diversity was similar to that of the field soils used to establish the microcosms in the short-term (< 6 weeks). The responses of soil microbiome to MS fumigation are context dependent and rely on abiotic, biotic, and agricultural management practices.
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Affiliation(s)
- Xiaoping Li
- Virginia Tech, Hampton Roads Agricultural Research and Extension Center, Virginia Beach, VA, 23455, USA
| | - Victoria Skillman
- Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston, OR, 97838, USA
| | - Jeremiah Dung
- Central Oregon Agricultural Research and Extension Center, Oregon State University, Madras, OR, 97741, USA
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, 97333, USA
| | - Kenneth Frost
- Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston, OR, 97838, USA.
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, 97333, USA.
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Soil Mycobiome Diversity under Different Tillage Practices in the South of West Siberia. LIFE (BASEL, SWITZERLAND) 2022; 12:life12081169. [PMID: 36013348 PMCID: PMC9409700 DOI: 10.3390/life12081169] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/26/2022] [Accepted: 07/26/2022] [Indexed: 11/16/2022]
Abstract
Managing soil biodiversity by reduced or no tillage is an increasingly popular approach. Soil mycobiome in Siberian agroecosystems has been scarcely studied; little is known about its changes due to tillage. We studied mycobiome in Chernozem under natural steppe vegetation and cropped for wheat by conventional or no tillage in a long-term field trial in West Siberia, Russia, by using ITS2 rDNA gene marker (Illumina MiSeq sequencing). Half of the identified OTUs were Ascomycota with 82% of the total number of sequence reads and showing, like other phyla (Basidiomycota, Zygomycota, Mortierellomycota, Chytridiomycota, Glomeromycota), field-related differential abundance. Several dominant genera (Mortierella, Chaetomium, Clonostachys, Gibberella, Fusarium, and Hypocrea) had increased abundance in both cropped soils as compared with the undisturbed one and therefore can be safely assumed to be associated with wheat residues. Fungal OTUs' richness in cropped soils was less than in the undisturbed one; however, no tillage shifted soil mycobiome composition closer to the latter, albeit, it was still similar to the ploughed soil, despite different organic matter and wheat residue content. The study provided the first inventory of soil mycobiome under different tillage treatments in the south of West Siberia, where wheat production is an important section of the regional economy.
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Li Y, Han C, Dong X, Sun S, Zhao C. Soil microbial communities of dryland legume plantations are more complex than non-legumes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 822:153560. [PMID: 35114224 DOI: 10.1016/j.scitotenv.2022.153560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/20/2022] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
Soil microorganisms play a crucial role in the vegetation restoration of dryland plantations and participating in biogeochemical cycles. However, how the co-occurrence networks of soil microbial communities respond to dryland legume and non-legume plantations is unclear. Here, we conducted a comparative analysis of legume (13-, 35-, and 55-years Caragana korshinskii) and non-legume (13- and 55-years Platycladus orientalis) plantations, including plant communities, soil physicochemical properties, and soil microbial communities, in the west of the Loess Plateau, China. The results showed higher richness and diversity, more keystone taxa and positive relationships, and larger connectivity and potential functions existed in soil bacterial and fungal communities of legume plantations. Meanwhile, richer plant communities and higher soil nutrients in legume plantations were found than those in non-legume plantations. We revealed that legume plantations shaped a more complex co-occurrence network, forming a virtuous cycling of "plant-soil-microbe" continuum in legume plantation ecosystems. Our results provided a new perspective on evaluating the ecological value and plantation stability of legume tree species in the vegetation restoration engineering of drylands.
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Affiliation(s)
- Yage Li
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, China; Yuzhong Mountain Ecosystems Observation and Research Station, Lanzhou 730000, China
| | - Chun Han
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, China; Yuzhong Mountain Ecosystems Observation and Research Station, Lanzhou 730000, China
| | - Xiaoxue Dong
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, China; Yuzhong Mountain Ecosystems Observation and Research Station, Lanzhou 730000, China
| | - Shan Sun
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, China; Yuzhong Mountain Ecosystems Observation and Research Station, Lanzhou 730000, China
| | - Changming Zhao
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, China; Yuzhong Mountain Ecosystems Observation and Research Station, Lanzhou 730000, China.
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15
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Pimentel MF, Srour AY, Warner AJ, Bond JP, Bradley CA, Rupe J, Chilvers MI, Rojas JA, Jacobs JL, Little CR, Robertson AE, Giesler LJ, Malvick D, Wise K, Tenuta A, Fakhoury AM. Ecology and diversity of culturable fungal species associated with soybean seedling diseases in the Midwestern United States. J Appl Microbiol 2022; 132:3797-3811. [PMID: 35226387 PMCID: PMC9311804 DOI: 10.1111/jam.15507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/29/2022] [Accepted: 02/21/2022] [Indexed: 12/03/2022]
Abstract
AIMS To isolate and characterize fungi associated with diseased soybean seedlings in Midwestern soybean production fields and to determine the influence of environmental and edaphic factors on their incidence. METHODS AND RESULTS Seedlings were collected from fields with seedling disease history in 2012 and 2013 for fungal isolation. Environmental and edaphic data associated with each field was collected. 3036 fungal isolates were obtained and assigned to 76 species. The most abundant genera recovered were Fusarium (73%) and Trichoderma (11.2%). Other genera included Mortierella, Clonostachys, Rhizoctonia, Alternaria, Mucor, Phoma, Macrophomina and Phomopsis. Most recovered species are known soybean pathogens. However, non-pathogenic organisms were also isolated. Crop history, soil density, water source, precipitation and temperature were the main factors influencing the abundance of fungal species. CONCLUSION Key fungal species associated with soybean seedling diseases occurring in several US production regions were characterized. This work also identified major environment and edaphic factors affecting the abundance and occurrence of these species. SIGNIFICANCE AND IMPACT OF THE STUDY The identification and characterization of the main pathogens associated with seedling diseases across major soybean-producing areas could help manage those pathogens, and devise more effective and sustainable practices to reduce the damage they cause.
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Affiliation(s)
- Mirian F. Pimentel
- Department of Agricultural SciencesSouthern Illinois UniversityCarbondaleIllinoisUSA
| | - Ali Y. Srour
- USDA, ARS, New England Plant, Soil, and Water LaboratoryOronoMaineUSA
| | | | - Jason P. Bond
- Department of Agricultural SciencesSouthern Illinois UniversityCarbondaleIllinoisUSA
| | - Carl A. Bradley
- Department of Plant PathologyUniversity of Kentucky Research and Educational CenterPrincetonKentuckyUSA
| | - John Rupe
- Department of Entomology and Plant PathologyUniversity of ArkansasFayettevilleArkansasUSA
| | - Martin I. Chilvers
- Department of Plant, Soil and Microbial SciencesMichigan State UniversityEast LansingMichiganUSA
| | - J. Alejandro Rojas
- Department of Plant, Soil and Microbial SciencesMichigan State UniversityEast LansingMichiganUSA
| | - Janette L. Jacobs
- Department of Plant, Soil and Microbial SciencesMichigan State UniversityEast LansingMichiganUSA
| | | | - Alison E. Robertson
- Department of Plant Pathology and MicrobiologyIowa State UniversityAmesIowaUSA
| | - Loren J. Giesler
- Department of Plant PathologyUniversity of Nebraska‐LincolnLincolnNebraskaUSA
| | - Dean Malvick
- Department of Plant PathologyUniversity of MinnesotaMinneapolisMinnesotaUSA
| | - Kiersten Wise
- Department of Botany and Plant PathologyPurdue UniversityWest LafayetteIndianaUSA
| | - Albert Tenuta
- Ontario Ministry of AgricultureFood and Rural Affairs (OMAFRA)RidgetownOntarioUSA
| | - Ahmad M. Fakhoury
- Department of Agricultural SciencesSouthern Illinois UniversityCarbondaleIllinoisUSA
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Kang S, Kim KT, Choi J, Kim H, Cheong K, Bandara A, Lee YH. Genomics and Informatics, Conjoined Tools Vital for Understanding and Protecting Plant Health. PHYTOPATHOLOGY 2022; 112:981-995. [PMID: 34889667 DOI: 10.1094/phyto-10-21-0418-rvw] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Genomics' impact on crop production continuously expands. The number of sequenced plant and microbial species and strains representing diverse populations of individual species rapidly increases thanks to the advent of next-generation sequencing technologies. Their genomic blueprints revealed candidate genes involved in various functions and processes crucial for crop health and helped in understanding how the sequenced organisms have evolved at the genome level. Functional genomics quickly translates these blueprints into a detailed mechanistic understanding of how such functions and processes work and are regulated; this understanding guides and empowers efforts to protect crops from diverse biotic and abiotic threats. Metagenome analyses help identify candidate microbes crucial for crop health and uncover how microbial communities associated with crop production respond to environmental conditions and cultural practices, presenting opportunities to enhance crop health by judiciously configuring microbial communities. Efficient conversion of disparate types of massive genomics data into actionable knowledge requires a robust informatics infrastructure supporting data preservation, analysis, and sharing. This review starts with an overview of how genomics came about and has quickly transformed life science. We illuminate how genomics and informatics can be applied to investigate various crop health-related problems using selected studies. We end the review by noting why community empowerment via crowdsourcing is crucial to harnessing genomics to protect global food and nutrition security without continuously expanding the environmental footprint of crop production.
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Affiliation(s)
- Seogchan Kang
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Ki-Tae Kim
- Department of Agricultural Life Science, Sunchon National University, Suncheon 57922, Korea
| | - Jaeyoung Choi
- Korea Institute of Science and Technology Gangneung Institute of Natural Products, Gangneung 25451, Korea
| | - Hyun Kim
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Korea
| | - Kyeongchae Cheong
- Plant Immunity Research Center, Seoul National University, Seoul 08826, Korea
| | - Ananda Bandara
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, PA 16802, U.S.A
| | - Yong-Hwan Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Korea
- Plant Immunity Research Center, Seoul National University, Seoul 08826, Korea
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Zhu H, Gong L, Luo Y, Tang J, Ding Z, Li X. Effects of Litter and Root Manipulations on Soil Bacterial and Fungal Community Structure and Function in a Schrenk's Spruce ( Picea schrenkiana) Forest. FRONTIERS IN PLANT SCIENCE 2022; 13:849483. [PMID: 35498706 PMCID: PMC9047989 DOI: 10.3389/fpls.2022.849483] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 03/24/2022] [Indexed: 06/14/2023]
Abstract
Soil microorganisms are the key driver of the geochemical cycle in forest ecosystem. Changes in litter and roots can affect soil microbial activities and nutrient cycling; however, the impact of this change on soil microbial community composition and function remain unclear. Here, we explored the effects of litter and root manipulations [control (CK), doubled litter input (DL), litter removal (NL), root exclusion (NR), and a combination of litter removal and root exclusion (NI)] on soil bacterial and fungal communities and functional groups during a 2-year field experiment, using illumina HiSeq sequencing coupled with the function prediction platform of PICRUSt and FUNGuild. Our results showed that litter and root removal decreased the diversity of soil bacteria and fungi (AEC, Shannon, and Chao1). The bacterial communities under different treatments were dominated by the phyla Proteobacteria, Acidobacteria, and Actinomycetes, and NL and NR reduced the relative abundance of the first two phyla. For the fungal communities, Basidiomycetes, Ascomycota, and Mortierellomycota were the dominant phyla. DL increased the relative abundance of Basidiomycetes, while NL and NR decreased the relative abundance of Ascomycota. We also found that litter and root manipulations altered the functional groups related to the metabolism of cofactors and vitamins, lipid metabolism, biosynthesis of other secondary metabolites, environmental adaptation, cell growth, and death. The functional groups including ectomycorrhizal, ectomycorrhizal-orchid mycorrhizal root-associated biotrophs and soil saprotrophs in the fungal community were also different among the different treatments. Soil organic carbon (SOC), pH, and soil water content are important factors driving changes in bacterial and fungal communities, respectively. Our results demonstrate that the changes in plant detritus altered the soil microbial community structure and function by affecting soil physicochemical factors, which provides important data for understanding the material cycle of forest ecosystems under global change.
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Affiliation(s)
- Haiqiang Zhu
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi, China
- Ecological Postdoctoral Research Station, Xinjiang University, Urumqi, China
| | - Lu Gong
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi, China
| | - Yan Luo
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi, China
| | - Junhu Tang
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi, China
| | - Zhaolong Ding
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi, China
| | - Xiaochen Li
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi, China
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Bacterial Communities in the Rhizosphere at Different Growth Stages of Maize Cultivated in Soil Under Conventional and Conservation Agricultural Practices. Microbiol Spectr 2022; 10:e0183421. [PMID: 35254138 PMCID: PMC9049951 DOI: 10.1128/spectrum.01834-21] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Farmers in Mexico till soil intensively, remove crop residues for fodder and grow maize often in monoculture. Conservation agriculture (CA), including minimal tillage, crop residue retention and crop diversification, is proposed as a more sustainable alternative. In this study, we determined the effect of agricultural practices and the developing maize rhizosphere on soil bacterial communities. Bulk and maize (Zea mays L.) rhizosphere soil under conventional practices (CP) and CA were sampled during the vegetative, flowering and grain filling stage, and 16S rRNA metabarcoding was used to assess bacterial diversity and community structure. The functional diversity was inferred from the bacterial taxa using PICRUSt. Conservation agriculture positively affected taxonomic and functional diversity compared to CP. The agricultural practice was the most important factor in defining the structure of bacterial communities, even more so than rhizosphere and plant growth stage. The rhizosphere enriched fast growing copiotrophic bacteria, such as Rhizobiales, Sphingomonadales, Xanthomonadales, and Burkholderiales, while in the bulk soil of CP other copiotrophs were enriched, e.g., Halomonas and Bacillus. The bacterial community in the maize bulk soil resembled each other more than in the rhizosphere of CA and CP. The bacterial community structure, and taxonomic and functional diversity in the maize rhizosphere changed with maize development and the differences between the bulk soil and the rhizosphere were more accentuated when the plant aged. Although agricultural practices did not alter the effect of the rhizosphere on the soil bacterial communities in the flowering and grain filling stage, they did in the vegetative stage. IMPORTANCE We studied the effect of sustainable conservation agricultural practices versus intensive conventional ones on the soil microbial diversity, potential functionality, and community assembly in rhizosphere of maize cultivated in a semiarid environment. We found that conservation agriculture practices increased the diversity of soil microbial species and functions and strongly affected how they were structured compared to conventional practices. Microbes affected by the roots of maize, the rhizobiome, were different and more diverse than in the surrounding soil and their diversity increased when the plant grew. The agricultural practices affected the maize rhizobiome only in the early stages of growth, but this might have an important impact on the development of maize plant.
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Orrù L, Canfora L, Trinchera A, Migliore M, Pennelli B, Marcucci A, Farina R, Pinzari F. How Tillage and Crop Rotation Change the Distribution Pattern of Fungi. Front Microbiol 2021; 12:634325. [PMID: 34220731 PMCID: PMC8247931 DOI: 10.3389/fmicb.2021.634325] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 05/13/2021] [Indexed: 12/13/2022] Open
Abstract
Massive sequencing of fungal communities showed that climatic factors, followed by edaphic and spatial variables, are feasible predictors of fungal richness and community composition. This study, based on a long-term field experiment with tillage and no-tillage management since 1995 and with a crop rotation introduced in 2009, confirmed that tillage practices shape soil properties and impact soil fungal communities. Results highlighted higher biodiversity of saprotrophic fungi in soil sites with low disturbance and an inverse correlation between the biodiversity of ectomycorrhizal and saprotrophic fungi. We speculated how their mutual exclusion could be due to a substrate-mediated niche partitioning or by space segregation. Moreover, where the soil was ploughed, the species were evenly distributed. There was higher spatial variability in the absence of ploughing, with fungal taxa distributed according to a small-scale pattern, corresponding to micro-niches that probably remained undisturbed and heterogeneously distributed. Many differentially represented OTUs in all the conditions investigated were unidentified species or OTUs matching at high taxa level (i.e., phylum, class, order). Among the fungi with key roles in all the investigated conditions, there were several yeast species known to have pronounced endemism in soil and are also largely unidentified. In addition to yeasts, other fungal species emerged as either indicator of a kind of management or as strongly associated with a specific condition. Plant residues played a substantial role in defining the assortment of species.
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Affiliation(s)
- Luigi Orrù
- Council for Agricultural Research and Economics, Research Centre for Genomics and Bioinformatics, Fiorenzuola d'Arda, Italy
| | - Loredana Canfora
- Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Rome, Italy
| | - Alessandra Trinchera
- Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Rome, Italy
| | - Melania Migliore
- Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Rome, Italy
| | - Bruno Pennelli
- Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Rome, Italy
| | - Andrea Marcucci
- Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Rome, Italy
| | - Roberta Farina
- Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Rome, Italy
| | - Flavia Pinzari
- National Research Council of Italy, Institute for Biological Systems, Rome, Italy
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20
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Bziuk N, Maccario L, Douchkov D, Lueck S, Babin D, Sørensen SJ, Schikora A, Smalla K. Tillage shapes the soil and rhizosphere microbiome of barley-but not its susceptibility towards Blumeria graminis f. sp. hordei. FEMS Microbiol Ecol 2021; 97:6129324. [PMID: 33544837 DOI: 10.1093/femsec/fiab018] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 02/03/2021] [Indexed: 12/11/2022] Open
Abstract
Long-term agricultural practices are assumed to shape the rhizosphere microbiome of crops with implications for plant health. In a long-term field experiment, we investigated the effect of different tillage and fertilization practices on soil and barley rhizosphere microbial communities by means of amplicon sequencing of 16S rRNA gene fragments from total community DNA. Differences in the microbial community composition depending on the tillage practice, but not the fertilization intensity were revealed. To examine whether these soil and rhizosphere microbiome differences influence the plant defense response, barley (cultivar Golden Promise) was grown in field or standard potting soil under greenhouse conditions and challenged with Blumeria graminis f. sp. hordei (Bgh). Amplicon sequence analysis showed that preceding tillage practice, but also aboveground Bgh challenge significantly influenced the microbial community composition. Expression of plant defense-related genes PR1b and PR17b was higher in challenged compared to unchallenged plants. The Bgh infection rates were strikingly lower for barley grown in field soil compared to potting soil. Although previous agricultural management shaped the rhizosphere microbiome, no differences in plant health were observed. We propose therefore that the management-independent higher microbial diversity of field soils compared to potting soils contributed to the low infection rates of barley.
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Affiliation(s)
- Nina Bziuk
- Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Messeweg 11-12, 38104 Braunschweig, Germany
| | - Lorrie Maccario
- Copenhagen University, Department of Biology, Section of Microbiology, Universitetsparken 15, 2100 Copenhagen, Denmark
| | - Dimitar Douchkov
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Department of Breeding Research, Corrensstraße 3, 06466 Seeland, Germany
| | - Stefanie Lueck
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Department of Breeding Research, Corrensstraße 3, 06466 Seeland, Germany
| | - Doreen Babin
- Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Messeweg 11-12, 38104 Braunschweig, Germany
| | - Søren J Sørensen
- Copenhagen University, Department of Biology, Section of Microbiology, Universitetsparken 15, 2100 Copenhagen, Denmark
| | - Adam Schikora
- Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Messeweg 11-12, 38104 Braunschweig, Germany
| | - Kornelia Smalla
- Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Messeweg 11-12, 38104 Braunschweig, Germany
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21
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Delitte M, Caulier S, Bragard C, Desoignies N. Plant Microbiota Beyond Farming Practices: A Review. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.624203] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Plants have always grown and evolved surrounded by numerous microorganisms that inhabit their environment, later termed microbiota. To enhance food production, humankind has relied on various farming practices such as irrigation, tilling, fertilization, and pest and disease management. Over the past few years, studies have highlighted the impacts of such practices, not only in terms of plant health or yields but also on the microbial communities associated with plants, which have been investigated through microbiome studies. Because some microorganisms exert beneficial traits that improve plant growth and health, understanding how to modulate microbial communities will help in developing smart farming and favor plant growth-promoting (PGP) microorganisms. With tremendous cost cuts in NGS technologies, metagenomic approaches are now affordable and have been widely used to investigate crop-associated microbiomes. Being able to engineer microbial communities in ways that benefit crop health and growth will help decrease the number of chemical inputs required. Against this background, this review explores the impacts of agricultural practices on soil- and plant-associated microbiomes, focusing on plant growth-promoting microorganisms from a metagenomic perspective.
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22
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Ouverson T, Eberly J, Seipel T, Menalled FD, Ishaq SL. Temporal Soil Bacterial Community Responses to Cropping Systems and Crop Identity in Dryland Agroecosystems of the Northern Great Plains. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.624242] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Industrialized agriculture results in simplified landscapes where many of the regulatory ecosystem functions driven by soil biological and physicochemical characteristics have been hampered or replaced with intensive, synthetic inputs. To restore long-term agricultural sustainability and soil health, soil should function as both a resource and a complex ecosystem. In this study, we examined how cropping systems impact soil bacterial community diversity and composition, important indicators of soil ecosystem health. Soils from a representative cropping system in the semi-arid Northern Great Plains were collected in June and August of 2017 from the final phase of a 5-year crop rotation managed either with chemical inputs and no-tillage, as a USDA-certified organic tillage system, or as a USDA-certified organic sheep grazing system with reduced tillage intensity. DNA was extracted and sequenced for bacteria community analysis via 16S rRNA gene sequencing. Bacterial richness and diversity decreased in all farming systems from June to August and was lowest in the chemical no-tillage system, while evenness increased over the sampling period. Crop species identity did not affect bacterial richness, diversity, or evenness. Conventional no-till, organic tilled, and organic grazed management systems resulted in dissimilar microbial communities. Overall, cropping systems and seasonal changes had a greater effect on microbial community structure and diversity than crop identity. Future research should assess how the rhizobiome responds to the specific phases of a crop rotation, as differences in bulk soil microbial communities by crop identity were not detectable.
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23
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Kim N, Zabaloy MC, Riggins CW, Rodríguez-Zas S, Villamil MB. Microbial Shifts Following Five Years of Cover Cropping and Tillage Practices in Fertile Agroecosystems. Microorganisms 2020; 8:E1773. [PMID: 33187276 PMCID: PMC7696634 DOI: 10.3390/microorganisms8111773] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/05/2020] [Accepted: 11/06/2020] [Indexed: 01/02/2023] Open
Abstract
Metagenomics in agricultural research allows for searching for bioindicators of soil health to characterize changes caused by management practices. Cover cropping (CC) improves soil health by mitigating nutrient losses, yet the benefits depend on the tillage system used. Field studies searching for indicator taxa within these systems are scarce and narrow in their scope. Our goal was to identify bioindicators of soil health from microbes that were responsive to CC (three levels) and tillage (chisel tillage, no-till) treatments after five years under field conditions. We used rRNA gene-based analysis via Illumina HiSeq2500 technology with QIIME 2.0 processing to characterize the microbial communities. Our results indicated that CC and tillage differentially changed the relative abundances (RAs) of the copiotrophic and oligotrophic guilds. Corn-soybean rotations with legume-grass CC increased the RA of copiotrophic decomposers more than rotations with grass CC, whereas rotations with only bare fallows favored stress-tolerant oligotrophs, including nitrifiers and denitrifiers. Unlike bacteria, fewer indicator fungi and archaea were detected; fungi were poorly identified, and their responses were inconsistent, while the archaea RA increased under bare fallow treatments. This is primary information that allows for understanding the potential for managing the soil community compositions using cover crops to reduce nutrient losses to the environment.
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Affiliation(s)
- Nakian Kim
- Department of Crop Sciences, University of Illinois, Turner Hall, 1102 S. Goodwin Ave., Urbana, IL 61801, USA; (N.K.); (C.W.R.)
| | - María C. Zabaloy
- Centro de Recursos Naturales Renovables de la Zona Semiárida (CERZOS), Universidad Nacional del Sur (UNS)-CONICET, Ave. de los Constituyentes s/n, Bahía Blanca 8000, Argentina;
| | - Chance W. Riggins
- Department of Crop Sciences, University of Illinois, Turner Hall, 1102 S. Goodwin Ave., Urbana, IL 61801, USA; (N.K.); (C.W.R.)
| | - Sandra Rodríguez-Zas
- Department of Animal Sciences, University of Illinois, 30 ASL, 127 W. Gregory Dr., Urbana, IL 61801, USA;
| | - María B. Villamil
- Department of Crop Sciences, University of Illinois, Turner Hall, 1102 S. Goodwin Ave., Urbana, IL 61801, USA; (N.K.); (C.W.R.)
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