Soil suppressiveness and its relations with the microbial community in a Brazilian subtropical agroecosystem under different management systems

Campos, Samanta Bolzan de; Lisboa, Bruno Brito; Camargo, Flávio Anastácio de Oliveira; Bayer, Cimélio; Sczyrba, Alexander; Dirksen, Paul; Albersmeier, Andreas; Kalinowski, Jörn; Beneduzi, Anelise; Costa, Pedro Beschoren da; Passaglia, Luciane Maria Pereira; Vargas, Luciano Kayser; Wendisch, Volker F.

doi:10.1016/j.soilbio.2016.02.010

Cited by 47 publications

(29 citation statements)

References 30 publications

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“…The development of suppressive soils can be induced by long-term monoculture or organic amendments [8]. Unique bacterial communities have been detected in suppressive soils [12,58]. Detailed analysis showed that specific bacterial strains played roles in the suppression of soil-borne diseases [59,60].…”

Section: Discussionmentioning

confidence: 99%

“…It has been reported that the reduction in soil microbial diversity was responsible for the burst of soilborne plant diseases [11]. There has been an increased interest in the microbial communities of diseasesuppressive soils, and these suppressive effects have been attributed to the enrichment of specific groups of soil microbes [12][13][14][15]. The fact that a community composed of non-antagonistic bacteria from multiple parallel mineralization systems could also suppress Fusarium wilt disease indicates the importance of the microbial community structure to the biocontrol capacity of BCAs [16].…”

Section: Introductionmentioning

confidence: 99%

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A predatory myxobacterium controls cucumber Fusarium wilt by regulating the soil microbial community

Luo

et al. 2020

Microbiome

104

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Background: Myxobacteria are micropredators in the soil ecosystem with the capacity to move and feed cooperatively. Some myxobacterial strains have been used to control soil-borne fungal phytopathogens. However, interactions among myxobacteria, plant pathogens, and the soil microbiome are largely unexplored. In this study, we aimed to investigate the behaviors of the myxobacterium Corallococcus sp. strain EGB in the soil and its effect on the soil microbiome after inoculation for controlling cucumber Fusarium wilt caused by Fusarium oxysporum f. sp. cucumerinum (FOC). Results: A greenhouse and a 2-year field experiment demonstrated that the solid-state fermented strain EGB significantly reduced the cucumber Fusarium wilt by 79.6% (greenhouse), 66.0% (2015, field), and 53.9% (2016, field). Strain EGB adapted to the soil environment well and decreased the abundance of soil-borne FOC efficiently. Spatiotemporal analysis of the soil microbial community showed that strain EGB migrated towards the roots and root exudates of the cucumber plants via chemotaxis. Cooccurrence network analysis of the soil microbiome indicated a decreased modularity and community number but an increased connection number per node after the application of strain EGB. Several predatory bacteria, such as Lysobacter, Microvirga, and Cupriavidus, appearing as hubs or indicators, showed intensive connections with other bacteria. Conclusion: The predatory myxobacterium Corallococcus sp. strain EGB controlled cucumber Fusarium wilt by migrating to the plant root and regulating the soil microbial community. This strain has the potential to be developed as a novel biological control agent of soil-borne Fusarium wilt.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A predatory myxobacterium controls cucumber Fusarium wilt by regulating the soil microbial community

Luo

et al. 2020

Microbiome

104

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“…The most dominant bacteria were found in spring and winter. Xanthomonadales and Burkholderiales were phytopathogens (Campos et al, 2016) predominant in RLH1. This means the activity of the hens during the spring may not improve the soil nutrition but increase the risk of plant disease.…”

Section: Seasonal Variation Of Microbial Communitiesmentioning

confidence: 98%

Impact of agro-farming activities on microbial diversity of acidic red soils in a Camellia Oleifera Forest

Yuan

2019

Rev. Bras. Ciênc. Solo

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The production of Camellia oleifera (oil tea), typically planted in acidic red soils in southern China, is limited by low soil fertility. Agro-farming is one way to promote soil fertility by increasing organic matter and microbial communities. To understand the impact of agro-farming activity on soil fertility, three types of agro-farming, namely, raising laying hens under forest (RLH), cultivating Lolium perenne grass under forest (LPG), and maintenance of native grass (MNG), were employed in an oil tea farm with acidic red soil in Changsha, China. Soil samples were collected from the farm to estimate microbial communities, pH, and total organic carbon (TOC) in different seasons. The results indicated that TOC and temperature were the dominant factors influencing the variations of bacterial communities, while temperature and pH affected the fungal communities in the soil. The most abundant bacterial phyla were Acidobacteria, Proteobacteria, Actinobacteria, and Chloroflexi, while the most abundant fungal phyla were Ascomycota, Basidiomycota, and Zygomycota. Regardless of treatment, the bacterial richness and diversity were both low in spring, and the fungal richness and diversity in summer and autumn were higher than in spring and winter. The TOC content and pH in LPG were significantly higher than in other treatments. Microbial communities in LPG and MNG were more stable than in RLH. In summary, cultivating grass under forest treatment was the best way to improve the microenvironment with the highest TOC content and fewer pathogenic microorganisms.

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“…Agricultural management regime plays a complex role in developing disease suppression as the outcome may vary and the results are indirect. Effects of long-term use of agricultural management practices such as minimum tillage (Campos et al 2016 ; Pankhurst et al 2002 ; van Agtmaal et al 2018 ), crop rotation (Manici et al 2005 ), crop residue retention (Medvecky et al, 2007 ), and organic farming (Bonanomi et al 2018a ) have been assessed on disease suppressiveness. The conventional intensive farming is often associated with increased destruction of soil structure and deterioration of soil health, which lead to decrease in soil biodiversity including the natural enemies and antagonistic microbial community (Crowder and Jabbour 2014 ).…”

Section: Agricultural Management Regime and Disease Suppressionmentioning

confidence: 99%

Disease-Suppressive Soils—Beyond Food Production: a Critical Review

Somasundaram

Naorem

Lal

et al. 2021

J Soil Sci Plant Nutr

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In the pursuit of higher food production and economic growth and increasing population, we have often jeopardized natural resources such as soil, water, vegetation, and biodiversity at an alarming rate. In this process, wider adoption of intensive farming practices, namely changes in land use, imbalanced fertilizer application, minimum addition of organic residue/manure, and non-adoption of site-specific conservation measures, has led to declining in soil health and land degradation in an irreversible manner. In addition, increasing use of pesticides, coupled with soil and water pollution, has led the researchers to search for an environmental-friendly and cost-effective alternatives to controlling soil-borne diseases that are difficult to control, and which significantly limit agricultural productivity. Since the 1960s, disease-suppressive soils (DSS) have been identified and studied around the world. Soil disease suppression is the reduction in the incidence of soil-borne diseases even in the presence of a host plant and inoculum in the soil. The disease-suppressive capacity is mainly attributed to diverse microbial communities present in the soil that could act against soil-borne pathogens in multifaceted ways. The beneficial microorganisms employ some specific functions such as antibiosis, parasitism, competition for resources, and predation. However, there has been increasing evidence on the role of soil abiotic factors that largely influence the disease suppression. The intricate interactions of the soil, plant, and environmental components in a disease triangle make this process complex yet crucial to study to reduce disease incidence. Increasing resistance of the pathogen to presently available chemicals has led to the shift from culturable microbes to unexplored and unculturable microbes. Agricultural management practices such as tillage, fertilization, manures, irrigation, and amendment applications significantly alter the soil physicochemical environment and influence the growth and behaviour of antagonistic microbes. Plant factors such as age, type of crop, and root behaviour of the plant could stimulate or limit the diversity and structure of soil microorganisms in the rhizosphere. Further, identification and in-depth of disease-suppressive soils could lead to the discovery of more beneficial microorganisms with novel anti-microbial and plant promoting traits. To date, several microbial species have been isolated and proposed as key contributors in disease suppression, but the complexities as well as the mechanisms of the microbial and abiotic interactions remain elusive for most of the disease-suppressive soils. Thus, this review critically explores disease-suppressive attributes in soils, mechanisms involved, and biotic and abiotic factors affecting DSS and also briefly reviewing soil microbiome for anti-microbial drugs, in fact, a consequence of DSS phenomenon.

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Soil suppressiveness and its relations with the microbial community in a Brazilian subtropical agroecosystem under different management systems

Cited by 47 publications

References 30 publications

A predatory myxobacterium controls cucumber Fusarium wilt by regulating the soil microbial community

A predatory myxobacterium controls cucumber Fusarium wilt by regulating the soil microbial community

Impact of agro-farming activities on microbial diversity of acidic red soils in a Camellia Oleifera Forest

Disease-Suppressive Soils—Beyond Food Production: a Critical Review

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