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Agronomy
Special Issues
Soil Microbe and Nematode Communities in Agricultural Systems
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Soil Microbe and Nematode Communities in Agricultural Systems

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Innovative Cropping Systems".

Deadline for manuscript submissions: 20 June 2024 | Viewed by 1680

Special Issue Editors

Dr. Fengjuan Pan

E-Mail Website
Guest Editor
Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin, China
Interests: soil nematode community structure; soil microfood web of nematodes and microorganisms in terrestrial ecosystems
Special Issues, Collections and Topics in MDPI journals
Dr. Yanfeng Hu

E-Mail Website
Guest Editor
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, China
Interests: plant engineering; management of plant-parasitic nematodes; nematode–plant interactions
Special Issues, Collections and Topics in MDPI journals
Dr. Shuxia Jia

E-Mail Website
Guest Editor
1. Department of Environmental Studies, University of California, Santa Cruz, CA 95064, USA
2. College of Forestry, Beihua University, Binjiangdong Road 3999, Jilin 132013, China
Interests: root traits; soil microbial community; soil carbon cycling

Special Issue Information

Dear Colleagues,

Soil microbes and nematodes are important components of soil ecosystems. They are widely used to indicate the disturbance of soil caused by anthropogenic or external environmental changes. Some of them are beneficial to agricultural production, but some cause crop diseases. Currently, a lot of pesticides, fertilizers, and mechanizations are used in agriculture to increase crop yields to meet the needs of a growing population, a demand which can in turn affect underground biodiversity. Hence, it is necessary to comprehensively evaluate the effects of agriculture management and land use on soil nematodes and microbial community structure and function.

We kindly invite authors to submit original research articles related to the community, function, identification, food web, and interactions of soil microbes and nematodes in agricultural ecosystems. Macroscopically, the agricultural ecosystems include farmland ecosystems, grassland ecosystems, and forest ecosystems.

Dr. Fengjuan Pan
Dr. Yanfeng Hu
Dr. Shuxia Jia
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • soil microorganisms
  • soil nematodes
  • community structure
  • soil biodiversity
  • soil functions
  • soil health
  • soil ecosystems

Published Papers (2 papers)

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Research

13 pages, 4413 KiB  
Article
Rhizosphere-Associated Microbiota Strengthen the Pathogenicity of Meloidogyne incognita on Arabidopsis thaliana
by Xing-Kui Zhou, Li Ma, Zi-Xiang Yang, Ling-Feng Bao and Ming-He Mo
Agronomy 2024, 14(4), 664; https://doi.org/10.3390/agronomy14040664 - 25 Mar 2024
Cited by 1 | Viewed by 638
Abstract
Microorganisms associated with nematodes or enriched in galls have been reported previously to aid plant-parasitic nematodes (PPNs) in infecting and establishing parasitism in the host plants. However, the rhizosphere-associated microbiota, which strengthens the pathogenicity of PPNs, remains largely unknown. This study illustrated rhizosphere [...] Read more.
Microorganisms associated with nematodes or enriched in galls have been reported previously to aid plant-parasitic nematodes (PPNs) in infecting and establishing parasitism in the host plants. However, the rhizosphere-associated microbiota, which strengthens the pathogenicity of PPNs, remains largely unknown. This study illustrated rhizosphere bacteria enhancing Meloidogyne incognita infection on Arabidopsis thaliana by comparing the gall numbers of the treatments between natural soil and the sterile soil or soils drenched with antibiotics. By culture-dependent and pot testing methods, sixteen bacterial combinations from rhizosphere soils of A. thaliana were demonstrated to enhance M. incognita pathogenicity, including the most effective Nocardioides. Single-strain inoculation from the Nocardioides combination significantly resulted in M. incognita forming more galls on roots than the control, in which N. nematodiphilus R-N-C8 was the most effective strain. Strain R-N-C8 could substantially facilitate the M. incognita second-stage juveniles (J2s) moving towards the roots of A. thaliana and infecting the roots by releasing chemoattractant to attract J2s. The chemoattractant from strain R-N-C8 was determined to be L-lysine. This study furnishes vital insights for understanding the infection of root-knot nematodes associated with rhizosphere microbes. Full article
(This article belongs to the Special Issue Soil Microbe and Nematode Communities in Agricultural Systems)
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18 pages, 2424 KiB  
Article
Effect of Application Rates of N and P Fertilizers on Soil Nematode Community Structure in Mollisols
by Xuerong Ni, Xiangming Zhu, Qingxiu Feng, Dan Zhao, Weiwei Huang and Fengjuan Pan
Agronomy 2024, 14(3), 507; https://doi.org/10.3390/agronomy14030507 - 29 Feb 2024
Viewed by 649
Abstract
Long-term application of chemical fertilizer poses an environmental threat to belowground ecosystems. However, the impact of nitrogen (N) or phosphorus (P) fertilizers on soil biodiversity and the conditions of soil food web remains largely unknown. Soil nematodes are the most abundant multicellular soil [...] Read more.
Long-term application of chemical fertilizer poses an environmental threat to belowground ecosystems. However, the impact of nitrogen (N) or phosphorus (P) fertilizers on soil biodiversity and the conditions of soil food web remains largely unknown. Soil nematodes are the most abundant multicellular soil animals and serve as excellent bioindicators of soil. Here, we investigated soil nematode communities and food web structure in a long-term experiment with different application rates of N and P fertilizers in northeast China. The application of N and P fertilizers increased the abundance of bacterivores but suppressed the abundance of omnivores and predators. The abundance of bacterivores exhibited an increasing trend, while that of omnivores and predators showed a decreasing trend with increasing rates of N and P fertilizers. Plant parasites displayed a decreasing trend in response to N fertilizer, but not to P fertilizer. N and P fertilizers also altered nematode functional guild composition, with N fertilizer increasing the abundance of Ba1, and P fertilizer increasing the abundance of Fu2 and Ba3. Nonmetric multidimensional scaling (NMDS) analysis revealed apparent successions of nematode communities from no fertilizer soils to high rates of N or P fertilizer soils at both the genus and functional guild levels. Furthermore, N and P fertilizers resulted in different nematode communities. In terms of nematode food web indices, N fertilizer increased the enrichment index (EI) but reduced the channel index (CI) and structure index (SI), whereas P fertilizer only reduced the SI value. High rates of N and P fertilizers increased the respired carbon of bacterivores but reduced the respired carbon of predators. Mantel tests revealed significant correlations between soil properties and the community composition of both fungivores and omnivores. Among all soil properties, available phosphorus (AP) had the greatest influence on the community structure of soil nematodes. Our findings indicate that N fertilizer has a powerful effect on nematode food web structure, while P fertilizer exerts a stronger effect on soil nematode community composition. Full article
(This article belongs to the Special Issue Soil Microbe and Nematode Communities in Agricultural Systems)
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