Occurrence of Sweetpotato (Ipomoea batatas) Wilt and Surface Rot Disease and Determining Resistance of Selected Varieties to the Pathogen in Korea

Paul, Narayan Chandra; Won, Park; Seung-yong, Lee，; Chung, Mi Nam; Lee, Hyeong-Un; Yang, Jung‐Wook

doi:10.3390/plants9040497

Cited by 8 publications

(5 citation statements)

References 33 publications

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“…seems to be one of the major isolates from rotted potato tubers, suggesting that they are majorly responsible for their spoilage. Therefore, the presence of F. oxysporum, and Penicillium species, agrees with earlier reports that these fungi are majorly associated with the spoilage of potato tubers (Lui et al, 2021;Paul et al, 2021;Paul et al, 2020;Gyasi et al, 2022;Lai et al, 2022). Several species of Curvularia have recently been reported from clinical samples (Madrid et al, 2014;Marin-Feli et al, 2020), but some are well-known for the global spoilage of cereals and tuber crops.…”

Section: Discussionsupporting

confidence: 88%

“…This suggests the crude extract's complete suppression of the fungal growth at a relatively lower concentration. Fusarium one of the major pathogens of post-harvest spoilage of potatoes and other crops in different regions of Africa and Asian countries (Nsofor et al, 2020;Tiwari et al, 2020;Lui et al, 2021;Paul et al, 2021;Paul et al, 2020;Gyasi et al, 2022;Lai et al, 2022;Ikechi-Nwogu and Nworuka, 2023). This could have important implications for the potential use of aqueous, acetone and ethanol extracts as natural alternatives to synthetic fungicides in pre-and The findings from this study revealed extract concentration-dependent mycelial growth inhibition patterns.…”

Section: Discussionmentioning

confidence: 99%

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Antifungal Activity of Citrus Limon Leaf Extracts against Fungal Pathogens Isolated from Decaying Potato Tubers in Supermarkets of the Eastern Cape Province, South Africa

Ehiobu

2023

Plant Prot.

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Globally, fungal pathogens pose severe threats to stored cereal and tuber crops, resulting in substantial losses in economic crops. This study investigated the inhibitory activities of aqueous, ethanol, and acetone leaf extracts of Citrus limon L. Osbeck against the mycelial growth of Curvularia mebaldsii, Fusarium oxysporum, and Penicillium species isolated from spoilt potato tubers retailed within supermarkets in Eastern Cape Province, South Africa. Various concentrations (100 g/L, 50 g/L, and 25 g/L) of the C. limon leaf extracts (aqueous, acetone and ethanol) were prepared and (5 mL) amended with potato dextrose agar (oxoid, UK) previously inoculated with the 7-day old culture of each fungal isolates before incubation at 28 oC. The percentage growth inhibition was determined to evaluate the antifungal efficacy of each extract. Aqueous, ethanol and acetone extracts at 50g/L and 100 g/L displayed 100 % inhibition against all three pathogens except Penicillium sp. with 91.0 - 90.97 % inhibition. The ethanol and acetone extracts had the most inhibitory effects against F. oxysporum C. mebaldsii. In contrast, the aqueous extracts displayed the least effects, though not significantly different (p0.05) across the concentrations. The notable antifungal effects against F. oxysporum, a prominent pathogen of post-harvest spoilage of potatoes, suggest the potential use of C. limon extracts to enhance the shelf-life of potatoes in supermarkets, specifically, and for post-harvest storage in general.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Antifungal Activity of Citrus Limon Leaf Extracts against Fungal Pathogens Isolated from Decaying Potato Tubers in Supermarkets of the Eastern Cape Province, South Africa

Ehiobu

2023

Plant Prot.

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“…How the precise identification of Fusarium is problematic, is necessary to do the identification with a multigene phylogeny for which the molecular markers ITS rDNA and EF-1α can be used because these gene sequences can solve the problem of the morphological identification; in this phylogenetic characterization, isolates produced single clades; however, there were subclades, which means there may have been race differentiation 27 , 28 . Using these molecular markers in our research found four species corresponding to F. oxysporm, F. graminearun, F. culmorum , and F. equiseti .…”

Section: Discussionmentioning

confidence: 99%

Fusarium spp. associated with Chenopodium quinoa crops in Colombia

Fonseca-Guerra

Pompeyo

Rozo

et al. 2022

Sci Rep

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Quinoa is a plant commonly-resistance to adverse biotic and abiotic factors. However, this crop can be affected by phytopathogenic fungi. There is a lack of knowledge about the fungi associated with quinoa plants in Colombia. Through morphological and molecular identification in this study were identified four Fusarium species associated with quinoa crops: Fusarium oxysporum, Fusarium graminearum, Fusarium equiseti, and Fusarium culmorum. For this, we collected samples of panicles, leaf tissue, root tissue, and soil for isolation of different isolates of Fusarium. We performed a pathogenicity test of the fungi strains, under greenhouse conditions to evaluate the pathogenicity in seedlings of the Piartal cultivar with two inoculation methods. First inoculating the stem through a nodal wound or second inoculating the abaxial face with a brush. The results indicate the presence of four species with both molecular markers, phylogenetically distributed in these groups. The four species turned out to be pathogenic but with different degrees of virulence with significant differences between F. graminearum and F. oxysporum depending on the inoculation method. This is the first report on the presence of Fusarium species isolated from Quinoa in Colombia.

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“…The soil consisted of 380 ml cornmeal, 1900 ml sand, and 110 ml sterile distilled water (SDW), and was sterilized twice at 121°C for 45 min. After cooling the sterile soil, a suspension of 2 ml of F. solani (NCBI accession number MZ930186) or F. oxysporum isolate SPL18019 ( Paul et al, 2020 ) with 10 6 conidia/ml was added (for the soil culture efficiency test, concentrations of 10 4, 10 5, 10 6 conidia/ml). The mixed soil was then cultured for 6 days (26°C, dark conditions), after which the Fusarium -cultured soil was further mixed with 4,560 ml and 2,280 ml sterile sand and soil, respectively, at 121°C for 45 min (twice), in a 3:1 ratio (v/v).…”

Section: Methodsmentioning

confidence: 99%

Incidence Rates of Root Rot in Sweetpotato Caused by Cultivation Soil and Soil Microorganisms During Storage Periods

Kim

Chung

et al. 2022

Front. Plant Sci.

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Sweetpotatoes require a storage period for year-round use and improved sweetness by starch degradation. However, long-term storage can cause root rot, and a large amount of sweetpotatoes can be discarded. Root rot is typically caused by pathogenic soil-borne Fusarium spp., and the development of root rot induced by the characteristics of cultivating soil in stored sweetpotato has not yet been identified. In this study, the effect of Fusarium spp. and microbial community in the cultivated soil on the root rot of sweetpotatoes was to be elucidated. Wounded sweetpotato were treated in soil cultures inoculated with F. solani or F. oxysporum for 2 days, and showed symptoms of root rot after 2 months of storage. The three study fields (Naju, Yeongam A, and B) were subjected to the same curing and storage treatments after harvest, and the incidence of root rot was 1.7- to 1.8-fold different after 3 months of storage. Across the three fields, concentrations of Fusarium spp. and of microbial communities differed according to the cultivation soil and period. In particular, Naju, which had the lowest incidence of root rot, had the lowest concentration of Fusarium spp. before harvest, and the smallest change in diversity of the microbial community during the cultivation period. However, tuberous roots harvested from the fields showed no significant differences in antioxidant activity or lesion size with the treatment of 106 conidia/ml F. solani. By solidifying the importance of cultivating soil and related microorganisms in the advancement of root rot of sweetpotato, our results may aid in preventing the decrease in the yield of cultivated sweetpotatoes through root rot control.

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Occurrence of Sweetpotato (Ipomoea batatas) Wilt and Surface Rot Disease and Determining Resistance of Selected Varieties to the Pathogen in Korea

Cited by 8 publications

References 33 publications

Antifungal Activity of Citrus Limon Leaf Extracts against Fungal Pathogens Isolated from Decaying Potato Tubers in Supermarkets of the Eastern Cape Province, South Africa

Antifungal Activity of Citrus Limon Leaf Extracts against Fungal Pathogens Isolated from Decaying Potato Tubers in Supermarkets of the Eastern Cape Province, South Africa

Fusarium spp. associated with Chenopodium quinoa crops in Colombia

Incidence Rates of Root Rot in Sweetpotato Caused by Cultivation Soil and Soil Microorganisms During Storage Periods

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