Cladosporium species causing “Cladosporium rot” on “Bosc” pear fruit in Argentina

Virginia, Temperini Carolina; Néstor, Alonso Javier; Dario, Colodner Adrián; Noemí, Pose Graciela

doi:10.1016/j.ram.2019.11.006

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…Mortierella alpina was reported to help Panax ginseng resist Fusarium oxysporum infection by regulating the fungal community in the root , and Mortierella capitata was reported to promote crop growth directly by altering gene expression levels in the plant roots and indirectly via interacting with indigenous rhizosphere bacteria . Cladosporium (Virginia et al, 2021;Wang T. et al, 2022), Plectosphaerella (Garibaldi et al, 2010;Xu et al, 2014), Zasmidium (Laranjeira et al, 2020), Aspergillus (Ali et al, 2022), and Chalara (Wang et al, 2021) were all plant pathogens, which mainly presented in rhizosphere soil and significantly increased with CC years as shown in this study.…”

Section: Microflora Changes Affected By Continuous Croppingsupporting

confidence: 74%

Continuous cropping of potato changed the metabolic pathway of root exudates to drive rhizosphere microflora

Xing,

Zhang,

Zhang

et al. 2024

Front. Microbiol.

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For potato production, continuous cropping (CC) could lead to autotoxicity buildup and microflora imbalance in the field soil, which may result in failure of crops and reduction in yield. In this study, non-targeted metabolomics (via liquid chromatography with tandem mass spectrometry (LC–MS/MS)) combined with metagenomic profiling (via high-throughput amplicon sequencing) were used to evaluate correlations between metabolomics of potato root exudates and communities of bacteria and fungi around potato plants to illustrate the impacts of CC. Potato plants were grown in soil collected from fields with various CC years (0, 1, 4, and 7 years). Metabolomic analysis showed that the contents and types of potential autotoxins in potato root exudates increased significantly in CC4 and CC7 plants (i.e., grown in soils with 4 and 7 years of CC). The differentially expressed metabolites were mainly produced via alpha-linolenic acid metabolism in plant groups CC0 and CC1 (i.e., no CC or 1 year CC). The metabolomics of the groups CC4 and CC7 became dominated by styrene degradation, biosynthesis of siderophore group non-ribosomal peptides, phenylpropanoid biosynthesis, and biosynthesis of various plant secondary metabolites. Continuous cropping beyond 4 years significantly changed the bacterial and fungal communities in the soil around the potato crops, with significant reduction of beneficial bacteria and accumulation of harmful fungi. Correlations between DEMs and microflora biomarkers were established with strong significances. These results suggested that continuous cropping of potato crops changed their metabolism as reflected in the plant root exudates and drove rhizosphere microflora to directions less favorable to plant growth, and it needs to be well managed to assure potato yield.

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Section: Microflora Changes Affected By Continuous Croppingsupporting

confidence: 74%

Continuous cropping of potato changed the metabolic pathway of root exudates to drive rhizosphere microflora

Xing,

Zhang,

Zhang

et al. 2024

Front. Microbiol.

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“…In this study, ginseng rhizosphere microorganisms were selected for the plate confrontation test to preliminarily study the interaction between M. alpina YW25 and the rhizosphere microorganisms. The results showed that the mycelial growth of M. alpina YW25 was inhibited by some probiotics in the rhizosphere, such as Bacillus , Streptomyces , Brevibacterium , Trichoderma , and Penicillium ( Lee et al, 2021 ; Zhao et al, 2021a , b ), as well as by some potential pathogens, such as Cladosporium and Aspergillus ( Carolina Virginia et al, 2021 ; Tan et al, 2021 ). Antimicrobial substances (lipopeptides, antibiotics, and volatile organic compounds) secreted by Bacillus and metabolites of Streptomyces (e.g.…”

Section: Discussionmentioning

confidence: 99%

Regulating Root Fungal Community Using Mortierella alpina for Fusarium oxysporum Resistance in Panax ginseng

Wang

Suo

et al. 2022

Front. Microbiol.

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Plant-associated microbes play important roles in plant health and disease. Mortierella is often found in the plant rhizosphere, and its possible functions are not well known, especially in medical plants. Mortierella alpina isolated from ginseng soil was used to investigate its effects on plant disease. The promoting properties and interactions with rhizospheric microorganisms were investigated in a medium. Further, a pot experiment was conducted to explore its effects on ginseng root rot disease. Physicochemical properties, high-throughput sequencing, network co-occurrence, distance-based redundancy analysis (db-RDA), and correlation analysis were used to evaluate their effects on the root rot pathogen. The results showed that Mortierella alpina YW25 had a high indoleacetic acid production capacity, and the maximum yield was 141.37 mg/L at 4 days. The growth of M. alpina YW25 was inhibited by some probiotics (Bacillus, Streptomyces, Brevibacterium, Trichoderma, etc.) and potential pathogens (Cladosporium, Aspergillus, etc.), but it did not show sensitivity to the soil-borne pathogen Fusarium oxysporum. Pot experiments showed that M. alpina could significantly alleviate the diseases caused by F. oxysporum, and increased the available nitrogen and phosphorus content in rhizosphere soil. In addition, it enhanced the activities of soil sucrase and acid phosphatase. High-throughput results showed that the inoculation of M. alpina with F. oxysporum changed the microbial community structure of ginseng, stimulated the plant to recruit more plant growth-promoting bacteria, and constructed a more stable microbial network of ginseng root. In this study, we found and proved the potential of M. alpina as a biocontrol agent against F. oxysporum, providing a new idea for controlling soil-borne diseases of ginseng by regulating rhizosphere microorganisms.

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Evaluation of rain-shelter cultivation mode effects on microecological environment of mountain-cultivated ginseng rhizosphere

Yu,

Piao,

Guo

et al. 2024

Preprint

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Rainfall, particularly in continental climates with a monsoonal tendency, impacts the microbial niches during mountain-cultivated ginseng growth. With microbial community shifts, ginseng diseases cultivated and protected under rain-shelter cultivation may ultimately be altered. Such cultivation may influence microflora dynamics via meteorological parameter variations; however, this is unclear yet. The present study found that rain-shelter cultivation affects the distribution of fungal communities within the mountain-cultivated ginseng. This led to an improved community structure in the ginseng rhizosphere, characterized by the proliferation of antagonistic fungi and a reduction in pathogenic fungi. Alternaria, the pathogen of black spot, has exhibited larger differences, reaching more than 2 times during the flowering period and 4 times during the withering period. The correlation analysis of meteorological factors indicates that soil temperature and humidity are the primary meteorological factors that affect mountain-cultivated ginseng. It is evident that rain-shelter cultivation regulated the microecological environment of the mountain-cultivated ginseng rhizosphere and resulted in positive outcomes. The disease investigation supports this point; the number of main diseases under rain-shelter cultivation was lower than those under open-field cultivation. The incidence of ginseng root diseases, such as rust rot and root rot, was reduced by 5–6%. And the incidence of ginseng leaf diseases, including gray mold and black spot, was reduced by 5–10%. This research provides evidence to address the dynamics of microbial ecology under rain-shelter cultivation and its benefits for sustainable mountain-cultivated ginseng management.

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Cladosporium species causing “Cladosporium rot” on “Bosc” pear fruit in Argentina

Cited by 5 publications

References 7 publications

Continuous cropping of potato changed the metabolic pathway of root exudates to drive rhizosphere microflora

Continuous cropping of potato changed the metabolic pathway of root exudates to drive rhizosphere microflora

Regulating Root Fungal Community Using Mortierella alpina for Fusarium oxysporum Resistance in Panax ginseng

Evaluation of rain-shelter cultivation mode effects on microecological environment of mountain-cultivated ginseng rhizosphere

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