Pathogenicity of Fungi Isolated from Atypical Skin Blemishes on Potatoes in South Africa and Zimbabwe

Zimudzi, Josephine; Coutinho, Teresa A.; Waals, J. E. van der

doi:10.1007/s11540-017-9345-0

Cited by 10 publications

(12 citation statements)

References 47 publications

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“…In most disease reports, more than one Fusarium species and/or fungal species of other genera may be present in the affected crops (e.g. Al‐Sadi et al., 2012; Mariscal‐Amaro et al., 2017; Saleh et al., 2017; Trabelsi et al., 2017; Zimudzi et al., 2017; Cao et al., 2018; Akgül and Ahioğlu, 2019; Al‐Nadabi et al., 2020; Le et al., 2020; Namsi et al., 2020; Özer et al., 2020; Azil et al., 2021; Ezrari et al., 2021; Khamas et al., 2021; Mohammed‐Ameen et al., 2021).…”

Section: Pest Categorisationmentioning

confidence: 99%

“…-Allium cepa (Tirado-Ramirez et al, 2021); -Beta vulgaris (Cao et al, 2018); -Cannabis sativa (Punja et al, 2018(Punja et al, , 2019; -Citrullus lanatus (Renter ıa-Mart ınez et al, 2015); -Citrus spp. (Al-Sadi et al, 2014); -Glycine max (Wang et al, 2021); -Nerium oleander (Mirhosseini et al, 2014); -Nicotiana tabacum (Qiu et al, 2021) -Phoenix dactylifera (Al-Sadi et al, 2012;Saleh et al, 2017;Al-Nadabi et al, 2020;Namsi et al, 2020;Nishad and Ahmed, 2020;Rabaaoui et al, 2021); -Prunus dulcis (Seidle, 2016;Stack et al, 2017); -Solanum tuberosum (Zimudzi et al, 2017;Azil et al, 2021); -Sorghum vulgare (Padwick, 1945); -Trifolium subterraneum (Tan et al 2011); -Triticum spp. (Ali et al, 2020;€ Ozer et al, 2020;Mohammed-Ameen et al, 2021;Van Coller et al, 2013); -Vitis vinifera (Akg € ul and Ahio glu, 2019); -Zea mays (Shan et al, 2017;Fallahi et al, 2019).…”

Section: Host Rangementioning

confidence: 99%

“…In Africa, the pathogen is reported from Algeria (Azil et al., 2021), Morocco (Ezrari et al., 2021), Tunisia (Trabelsi et al., 2017; Gargouri et al., 2018; Namsi et al., 2020; Rabaaoui et al., 2021) and South Africa (Van Coller et al., 2013; Mojela, 2017; Zimudzi et al., 2017; Sandoval‐Denis et al., 2018).…”

Section: Pest Categorisationmentioning

confidence: 99%

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Pest categorisation of Fusarium brachygibbosum

Bragard¹,

Serio²,

Gonthier³

et al. 2021

EFS2

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The EFSA Plant Health Panel performed a pest categorisation of Fusarium brachygibbosum Padwick. F. brachygibbosum is a well-characterised fungal plant pathogen with opportunistic behaviour, mostly isolated along with other fungal pathogens in symptomatic hosts. It has been reported from Africa, America, Asia and Oceania where it is has been associated with a wide range of symptoms on approximately 25 cultivated and non-cultivated plant species. The pathogen has been reported in Italy in soil/marine sediments and in quinoa (Chenopodium quinoa) and durum wheat (Triticum turgidum subsp. durum) seeds. The pathogen is not included in the EU Commission Implementing Regulation 2019/2072. This pest categorisation focused on a selected range of host plant species on which F. brachygibbosum fulfilled Koch 0 s postulates and was formally identified by multilocus gene sequencing analysis. Host plants for planting, seed of host plants and soil and other substrates originating in infested third countries are main pathways for the entry of the pathogen into the EU. There are no reports of interceptions of F. brachygibbosum in the EU. Host availability and climate suitability factors occurring in the EU are favourable for the establishment of the pathogen in Member States (MSs). Phytosanitary measures are available to prevent the introduction of the pathogen into the EU. Additional measures are available to mitigate the risk of entry and spread of the pathogen in the EU. Despite the low aggressiveness observed in some reported hosts, it has been shown that, in the areas of its present distribution, the pathogen has a direct impact on certain hosts (e.g. almond, onion, soybean, tobacco) that are also relevant for the EU. The Panel concludes that F. brachygibbosum satisfies all the criteria to be regarded as a potential Union quarantine pest. However, high uncertainty remains regarding the distribution of the pathogen in the EU and some uncertainty exists about its potential impact in the EU. Specific surveys and re-evaluation of Fusarium isolates in culture collections could reduce these uncertainties.

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Section: Pest Categorisationmentioning

confidence: 99%

Section: Host Rangementioning

confidence: 99%

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Pest categorisation of Fusarium brachygibbosum

Bragard¹,

Serio²,

Gonthier³

et al. 2021

EFS2

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“…The fungus Macrophomina phaseolina is a noxious pathogen that infects more than 500 host plant species belonging to about 100 families globally (Schroeder et al 2019). The pathogen has a wide geographical distribution, and is commonly found in Europe, Africa, Asia, South and North America (Zimudzi et al 2017). It causes stem rot, charcoal rot and root rot in major crops including cotton, sorghum, maize, sunflower, soybean, sesame, jute, green gram and common bean with severe yield losses (Khan et al 2017;Degani et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Trichoderma viride Controls Macrophomina phaseolina through its DNA disintegration and Production of Antifungal Compounds

Khan¹

2021

IJAB

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Macrophomina phaseolina is a highly destructive pathogen of more than 500 plant species. It is difficult to eradicate it through chemical means as no patented fungicide is available against this pathogen. Biological control is the possible alternative method for its suitable management. The present study was carried out to evaluate the biocontrol potential of five Trichoderma spp. against M. phaseolina and the possible mechanisms of action. Identifications of all the Trichoderma spp. viz. T. hamatum, T. harzianum, T. koningii, T. longipile and T. viride were confirmed on molecular basis by using two universal primer pairs namely ITS and EF1. Their biocontrol potential was evaluated in dual culture plate method where T. viride showed the highest inhibitory efficacy (63%) against M. phaseolina. T. koningii, T. hamatum and T. longipile showed akin effects by arresting growth of the pathogen by 46–47% followed by T. harzianum (28%). To find out the mechanisms of action, secondary extrolites of the best biocontrol fungus T. viride were tested against the pathogenic genomic DNA where all the concentrations partially degraded DNA bands after 24 h of incubation and a complete DNA band disappearance was noted after 48 h incubation. In addition, T. viride culture filtrates were partitioned with chloroform and ethyl acetate and subjected to GC-MS analysis for identification of potential antifungal constituents. The most abundant identified volatile compounds in the two organic solvent fractions were 9,12-octadecadienoic acid (Z,Z)- (44.54%), n-hexadecanoic acid (24.02%), hexadecanoic acid, 2-hydroxy-1-(hydroxymethyl) ethyl ester (14.25%), 9-tricosene, (Z)- (10.43%) and [1,1'-bicyclopropyl]-2-octanoic acid, 2'-hexyl-, methyl ester (10.43%). To conclude, T. viride was the best biocontrol agent against M. phaseolina and acts against the pathogen by DNA disintegration and production of antifungal secondary metabolites. © 2021 Friends Science Publishers

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“…spinifex Cav. (Loro et al 2012), and in different cultivars of Solanum tuberosum (Zimudzi et al 2017). Although this fungus is not reported as a phytopathogen, it causes contamination issues in in-vitro Stevia cultures.…”

Section: Discussionmentioning

confidence: 99%

Antifungal activity of silver nanoparticles during in-vitro culture of Stevia rebaudiana Bertoni

Sánchez-Segura

et al. 2019

Preprint

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30Contamination by fungi and bacteria during the in-vitro propagation of plants leads to considerable losses of biological 31 material and precludes phytosanitary certification. The anti-microbial effect of silver nanoparticles (AgNPs) may be 32 an alternative for the eradication of in-vitro contaminants. This study evaluated the microbicidal activity of AgNPs on 33 a recurrent fungus during the micropropagation of stevia (Stevia rebaudiana Bertoni). First, the fungus was isolated 34 and identified at a molecular level by the sequencing and analysis of the ITS4/ITS5 rDNA region. The results of the 35 phylogenetic analysis of various fungi species showed that the strain under study (16-166-H) belongs to the genus 36 Sordaria and is 86.74% similar to S. tomento-alba (strain CBS 260.78). Subsequently, the inhibition of the growth of 37 S. tomento-alba was tested under different concentrations of AgNPs (0, 25, 50, 100, and 200 mg L -1 ), observing that 38 50 and 100 mg L -1 achieve ca. 50% growth inhibition (IC 50 ), while 200 mg L -1 produces a drastic inhibition. On the 39 other hand, the shape and size of AgNPs was examined using transmission electron microscopy (TEM), and the 40 transport and accumulation of AgNPs in S. tomento-alba cells were monitored through multiphoton microscopy. The 41 morphological and fluorescence analyses showed that AgNPs display different sizes, with larger nanoparticles retained 42 in fungal cell walls while smaller AgNPs penetrate into fungal cells. Probably, apoplastic and symplastic mechanisms 43 involved in the accumulation and transport of AgNPs affect the metabolic processes of the fungus, thus inhibiting its 44 growth. These results suggest that AgNPs possess antifungal activity and can be used in the eradication of contaminants 45 during the in-vitro culture of plant species.46 47

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Pathogenicity of Fungi Isolated from Atypical Skin Blemishes on Potatoes in South Africa and Zimbabwe

Cited by 10 publications

References 47 publications

Pest categorisation of Fusarium brachygibbosum

Pest categorisation of Fusarium brachygibbosum

Trichoderma viride Controls Macrophomina phaseolina through its DNA disintegration and Production of Antifungal Compounds

Antifungal activity of silver nanoparticles during in-vitro culture of Stevia rebaudiana Bertoni

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