Deciphering Microbiome Related to Rusty Roots of Panax ginseng and Evaluation of Antagonists Against Pathogenic Ilyonectria

Liu, Defei; Sun, Huanjun; Ma, Hongwu

doi:10.3389/fmicb.2019.01350

Cited by 41 publications

(38 citation statements)

References 58 publications

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“…Most soil-borne diseases are caused by fungi under the CC systems. For instance, pathogenic fungi caused soil-borne diseases in the continuous peanut [13] and soybean cropping [127] systems by reducing the abundance of anti-pathogenic taxa [119,175]. In another study, the soil fungal diversity was significantly reduced after three years of continuous notoginseng cropping.…”

Section: Soil-borne Fungal Diseasesmentioning

confidence: 97%

Continuous Cropping Alters Multiple Biotic and Abiotic Indicators of Soil Health

et al. 2020

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The continuous cropping (CC) of major agricultural, horticultural, and industrial crops is an established practice worldwide, though it has significant soil health-related concerns. However, a combined review of the effects of CC on soil health indicators, in particular omics ones, remains missing. The CC may negatively impact multiple biotic and abiotic indicators of soil health, fertility, and crop yield. It could potentially alter the soil biotic indicators, which include but are not limited to the composition, abundance, diversity, and functioning of soil micro- and macro-organisms, microbial networks, enzyme activities, and soil food web interactions. Moreover, it could also alter various soil abiotic (physicochemical) properties. For instance, it could increase the accumulation of toxic metabolites, salts, and acids, reduce soil aggregation and alter the composition of soil aggregate-size classes, decrease mineralization, soil organic matter, active carbon, and nutrient contents. All these alterations could accelerate soil degradation. Meanwhile, there is still a great need to develop quantitative ranges in soil health indicators to mechanistically predict the impact of CC on soil health and crop yield gaps. Following ecological principles, we strongly highlight the significance of inter-, mixture-, and rotation-cropping with cover crops to sustain soil health and agricultural production.

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Section: Soil-borne Fungal Diseasesmentioning

confidence: 97%

Continuous Cropping Alters Multiple Biotic and Abiotic Indicators of Soil Health

et al. 2020

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“…Before transplanting, ten soil samples were collected from random locations in each plot and combined to generate one bulk soils (BL). Then, rhizosphere soil samples were collected at one of the three developmental stages of P. notoginseng in each year: (1) vegetative (V, May); (2) owering (F, Jul), (3) root growth (R, Oct), namely 2-year V (2YV), 2-year F (2YF), 2-year R (2YR), 3-year V (3YV), 3-year F (3YF), and 3-year R (3YR). At each sampling time, ten randomly selected healthy plants were removed from each plot, and mixed to generate one rhizosphere sample [26].…”

Section: Developmental Stages Sampling Experimentsmentioning

confidence: 99%

WITHDRAWN: Rhizosphere Microbiome is Associated with Yield and Medical Value of the Perennial Panax Notoginseng

Wei

Zhang

et al. 2020

Preprint

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Background: Rhizosphere microbiome play important roles in promoting plant growth. However, it is not well understood how rhizosphere microbiome were driven by medical plants during growth stages and whether they contribute the accumulation of medical values. Panax notoginseng is a perennial medicinal plant, which belowground biomass and saponin contents are the important indicators of its value. Here, we use high-throughput sequencing method to study the temporal dynamics of perennial P. notoginseng rhizosphere microbiomes and the relationship between the indicators and core rhizosphere microbiomes.Results: The results show that the diversity, composition and network structures of the bacterial and fungal communities are mainly driven by the developmental stages. And succession characteristics of bacterial and fungal diversity show similar parabolic patterns during the developmental stages. Enrichment and depletion of the bacterial and fungal communities are active at the 3-year root growth (3YR) stage. From samples collected at a large-spatial P. notoginseng production area at the 3YR stage, we obtained 639 bacterial and 310 fungal core operational taxonomic units (OTUs). Analysis of the data indicate that the microbiome diversity is related to the belowground biomass and total saponin contents. Some genera, such as Pseudomonas, Massilia, Sphingobium, and Phoma are positively correlated to the belowground biomass, and genera likely Staphylotrichum, Chaetosphaeria, and Podospora are positively correlated with total saponin contents. Additionally, we identified 36 microbial functions involving in plant-microbe and microbe-microbe interactions, nutrition acquisition, and disease resistance. They are related to belowground biomass and saponin contents. Conclusions: In short, this study provides a detailed and systematic survey of rhizosphere microbiome in P. notoginseng and reveals that P. notoginseng rhizosphere microbiomes are largely driven by the developmental stages, while the core microbiomes are related to the belowground biomass and saponins contents of the plant. The finding may enhance our understanding of the interaction between microbes and perennial plants and improve our ability to manage root microbiota for sustainable production of the herb medicine.

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“…e relationship between rhizospheric microorganisms and rusty root symptoms in P. ginseng has been extensively investigated. Several studies have demonstrated that rusty root can be caused by bacteria, fungi, or a combination of both [25,26]. For example, Farh et al reported that the rusty root of P. ginseng was caused by Cylindrocarpon destructans var.…”

Section: Introductionmentioning

confidence: 99%

“…destructans [11], while Lu et al investigating the pathogenicity of Ilyonectria robusta against the root of P. ginseng using repeated inoculation, highlighted that I. robusta could be the causative agent of rusty root of P. ginseng in China [27]. Recent studies have also indicated that the Ilyonectria fungus was the most likely cause of rusty root in P. ginseng, as this pathogen was found to be enriched in the rhizosphere soils of plants exhibiting rusty root symptoms [11,25]. Furthermore, Guan et al isolated Fusarium redolens from diseased roots of P. ginseng and reported this pathogenic fungus as a new causative agent of P. ginseng root rot in China [28].…”

Section: Introductionmentioning

confidence: 99%

Microbial Community Changes in the Rhizosphere Soil of Healthy and Rusty Panax ginseng and Discovery of Pivotal Fungal Genera Associated with Rusty Roots

Wei

Wang

Cao

et al. 2020

BioMed Research International

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Panax ginseng Meyer, a valuable medicinal plant, is severely threatened by rusty root, a condition that greatly affects its yield and quality. Studies investigating the relationship between soil microbial community composition and rusty roots are vital for the production of high-quality ginseng. Here, high-throughput sequencing was employed to systematically characterize changes in the soil microbial community associated with rusty roots. Fungal diversity was lower in the soils of rusty root-affected P. ginseng than in those of healthy plants. Importantly, principal coordinate analysis separated the fungal communities in the rhizosphere soils of rusty root-affected ginseng from those of healthy plants. The dominant bacterial and fungal genera differed significantly between rhizosphere soils of healthy and rusty root-affected P. ginseng, and linear discriminant analysis effect size (LEfSe) further indicated a strong imbalance in the soil microbial community of diseased plants. Significantly enriched bacterial genera (including Rhodomicrobium, Knoellia, Nakamurella, Asticcacaulis, and Actinomadura) were mainly detected in the soil of rusty root-affected P. ginseng, whereas significantly enriched fungal genera (including Xenopolyscytalum, Arthrobotrys, Chalara, Cryptococcus, and Scutellinia) were primarily detected in the soil of healthy plants. Importantly, five fungal genera (Cylindrocarpon, Acrophialophora, Alternaria, Doratomyces, and Fusarium) were significantly enriched in the soil of rusty root-affected plants compared with that of healthy plants, suggesting that an increase in the relative abundance of these pathogenic fungi (Cylindrocarpon, Alternaria, and Fusarium) may be associated with ginseng rusty roots. Additionally, this study is the first to report that an increase in the relative abundances of Acrophialophora and Doratomyces in the rhizosphere of P. ginseng may be associated with the onset of rusty root symptoms in this plant. Our findings provide potentially useful information for developing biological control strategies against rusty root, as well as scope for future screening of fungal pathogens in rusty roots of P. ginseng.

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Deciphering Microbiome Related to Rusty Roots of Panax ginseng and Evaluation of Antagonists Against Pathogenic Ilyonectria

Cited by 41 publications

References 58 publications

Continuous Cropping Alters Multiple Biotic and Abiotic Indicators of Soil Health

Continuous Cropping Alters Multiple Biotic and Abiotic Indicators of Soil Health

WITHDRAWN: Rhizosphere Microbiome is Associated with Yield and Medical Value of the Perennial Panax Notoginseng

Microbial Community Changes in the Rhizosphere Soil of Healthy and Rusty Panax ginseng and Discovery of Pivotal Fungal Genera Associated with Rusty Roots

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