First Report of Root Rot Caused by <i>Plectosphaerella cucumerina</i> on Cabbage in China

Li, Pan-Liang; Chai, Ali; Shi, Yanxia; Xie, Xuewen; Li, Baoju

doi:10.5941/myco.2017.45.2.110

Cited by 18 publications

(7 citation statements)

References 12 publications

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“…On the other hand, phytopathogenic fungi identified in this study include Curvularia lunata (Liu et al 2010 ), Phaeosphaeriopsis sp. (Golzar and Wang 2012 ; Thambugala et al 2014 ), Talaromyces minioluteus (Stošić et al 2019 ), P. noxium (Ann et al 2002 ; Sahashi et al 2014 ; Chung et al 2015 ), and Plectosphaerella cucumerina (Carlucci et al 2012 ; Li et al 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Fungal communities in bat guano, speleothem surfaces, and cavern water in Madai cave, Northern Borneo (Malaysia)

et al. 2021

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The island of Borneo is a global biodiversity hotspot. However, its limestone caves are one of its least-studied ecosystems. We report for the first time the fungal species richness, diversity and abundance from Madai cave, situated in north-eastern Borneo. Environmental samples from inside the cave environment were collected (guano, speleothem, and cavern water) via opportunistic sampling. The dilution method was performed for isolation of fungi. Morphological characterisation and molecular analysis of the ITS region were utilised for the identification of isolates. Fifty-five pure cultures of fungi were attained, comprising 32 species from 15 genera, eight orders, and two divisions, Ascomycota and Basidiomycota. Ascomycetes dominated the fungal composition, accounting for 53 (96%) out of 55 total isolates. Penicillium spp. accounted for more than 47.1% of fungal abundance in all sample types. However, Aspergillus spp. had the highest occurrence rate, being isolated from all environmental samples except one. Purpureocillium lilacinum was isolated most frequently, appearing in five separate samples across all three substrates. Annulohypoxylon nitens, Ganoderma australe, Pyrrhoderma noxium, and Xylaria feejeensis were discovered and reported for the first time from the cave environment. This study provides additional data for further research on the mycoflora of Sabah's various ecosystems, especially limestone caves.

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Section: Discussionmentioning

confidence: 99%

Fungal communities in bat guano, speleothem surfaces, and cavern water in Madai cave, Northern Borneo (Malaysia)

et al. 2021

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“…Like Fusarium spp., P. cucumerina also soil inhabiting plant pathogen and has been reported on many crops, including alfalfa, cabbage, potato, tomato, and sun ower (Abad et al, 2000;Li et al, 2017). Though having a wide host range, it was reported only on the wild arrowhead in South Korea (Li et al, 2017). To the best of our knowledge, this is the rst report of root and crown rot of strawberry caused by P. cucumerina in South Korea.…”

Section: Discussionmentioning

confidence: 91%

“…To the best of our knowledge, F. solani has not been reported as the causative agent of crown and root rot of strawberry in South Korea. Like Fusarium spp., P. cucumerina also soil inhabiting plant pathogen and has been reported on many crops, including alfalfa, cabbage, potato, tomato, and sun ower (Abad et al, 2000;Li et al, 2017). Though having a wide host range, it was reported only on the wild arrowhead in South Korea (Li et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Morphological and Molecular Characteristics of Fungal Species Associated with Crown Rot of Strawberry in South Korea

Hassan

Chang

2021

Preprint

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Crown and root rot is the most important and destructive strawberry diseases in Korea as it causessubstantial economic loss. In August 2020, a severe outbreak of crown and root rot on strawberries (Fragaria×ananassa Duch.) was observed in the greenhouse at Sangju, South Korea. Infected plantlets displayed browning rot within the crown and root, stunted growth, and poor rooting. Thirty fungal isolates were procured from the affected plantlet. Isolates were identified based on morphological characteristics and pathogenicity test as well as sequence data obtained from internal transcribed spacer, large subunit ribosomal ribonucleic acid, translation elongation factor,and RNA polymerase Ⅱ-second largest subunit. Results showed that thecrown and root rot of strawberry in Korea was caused by three distinct fungal species:Fusarium oxysporum species complex, F. solani species complex, andPlectosphaerella cucumerina. To the best of our knowledge,F. solani species complex andP. cucumerinaare reported for the first time as the causal agents of the crown and root rot of strawberryin South Korea.Pathogenicity tests confirmed that these isolates are pathogenic to strawberry.Understanding the composition and biology of the pathogen population will be helpful toprovide effectivecontrol strategies for the disease.

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“…Plectosphaerella cucumerina AR1 is a filamentous Ascomycete fungus, mostly encountered in the terrestrial environment as a pathogen of various plant species and vegetables [e.g., lettuce (Usami and Katagiri, 2017), cabbage (Li et al, 2017), broomrape (Xu et al, 2016), sunflower (Zhang et al, 2015), bottle gourd (Yan et al, 2016), tomato, melon (Carlucci et al, 2012), potato (Gao et al, 2016)] and to a lesser extent in marine ecosystems where it has been described as host of ascidian invertebrates (López-Legentil et al, 2015), sponges (Wang et al, 2008) and shells (Velmurugan et al, 2011). To our knowledge, this is the first time that P. cucumerina (Figure 1) has been isolated from submerged plant litter in a freshwater ecosystem.…”

Section: Discussionmentioning

confidence: 99%

Nicosulfuron Degradation by an Ascomycete Fungus Isolated From Submerged Alnus Leaf Litter

et al. 2018

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Nicosulfuron is a selective herbicide belonging to the sulfonylurea family, commonly applied on maize crops. Its worldwide use results in widespread presence as a contaminant in surface streams and ground-waters. In this study, we isolated, for the first time, the Plectosphaerella cucumerina AR1 nicosulfuron-degrading fungal strain, a new record from Alnus leaf litter submerged in freshwater. The degradation of nicosulfuron by P. cucumerina AR1 was achieved by a co-metabolism process and followed a first-order model dissipation. Biodegradation kinetics analysis indicated that, in planktonic lifestyle, nicosulfuron degradation by this strain was glucose concentration dependent, with a maximum specific degradation rate of 1 g/L in glucose. When grown on natural substrata (leaf or wood) as the sole carbon sources, the Plectosphaerella cucumerina AR1 developed as a well-established biofilm in 10 days. After addition of nicosulfuron in the medium, the biofilms became thicker, with rising mycelium, after 10 days for leaves and 21 days for wood. Similar biofilm development was observed in the absence of herbicide. These fungal biofilms still conserve the nicosulfuron degradation capacity, using the same pathway as that observed with planktonic lifestyle as evidenced by LC-MS analyses. This pathway involved first the hydrolysis of the nicosulfuron sulfonylurea bridge, leading to the production of two major metabolites: 2-amino-4,6-dimethoxypyrimidine (ADMP) and 2-(aminosulfonyl)-N,N-dimethyl-3-pyridinecarboxamide (ASDM). One minor metabolite, identified as 2-(1-(4,6-dimethoxy-pyrimidin-2-yl)-ureido)-N,N-dimethyl-nicotinamide (N3), derived from the cleavage of the C-S bond of the sulfonylurea bridge and contraction by elimination of sulfur dioxide. A last metabolite (N4), detected in trace amount, was assigned to 2-(4,6-dimethoxy-pyrimidin-2-yl)-N,N-dimethyl-nicotinamide (N4), resulting from the hydrolysis of the N3 urea function. Although fungal growth was unaffected by nicosulfuron, its laccase activity was significantly impaired regardless of lifestyle. Leaf and wood surfaces being good substrata for biofilm development in rivers, P. cucumerina AR1 strain could thus have potential as an efficient candidate for the development of methods aiming to reduce contamination by nicosulfuron in aquatic environments.

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First Report of Root Rot Caused by Plectosphaerella cucumerina on Cabbage in China

Cited by 18 publications

References 12 publications

Fungal communities in bat guano, speleothem surfaces, and cavern water in Madai cave, Northern Borneo (Malaysia)

Fungal communities in bat guano, speleothem surfaces, and cavern water in Madai cave, Northern Borneo (Malaysia)

Morphological and Molecular Characteristics of Fungal Species Associated with Crown Rot of Strawberry in South Korea

Nicosulfuron Degradation by an Ascomycete Fungus Isolated From Submerged Alnus Leaf Litter

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