A new boll rot disease of cotton gossypium hirsutum l. Pdf on sep 10, 2012, jose ricardo liberato and others published. We do not use these to store personal information about you. Corynespora cassiicola requires high humidity for infection and is additionally favored in locations with substantial periods of high moisture 1644 hours. Among them, 12, 34, 56, and 78 were pairs of epimers. This fungus is present in some hevea rubber plantations and nurseries in. The planar structures were determined by extensive nmr spectroscopic data. A boll rot of cotton caused by corynespora cassiicola in. Jsv provided expertise for the manual tuning of clustering parameters. Continuing to use this website means you agree to our use of cookies. Metconazole exhibited excellent preventive and curative activities in vivo metconazole reduced disease severity of corynespora. Diversity of the cassiicolin gene in corynespora cassiicola. The fungus corynespora cassiicola is an important pathogen that causes necrotic lesions in several plant species. Occurrence of corynespora cassiicola isolates resistant to.
Morphological and molecular characterization of isolates. In the rubber tree, this fungus causes the corynespora leaf fall clf disease, which increasingly affects natural rubber production in asia and africa. Leaf spot of pawpaw is hereby reported for the first time in nigeria. Detection of corynespora cassiicola in hevea rubber tree from. A new leaf and berry spot disease, and leaf fall caused by corynespora cassiicola is reported on coffea canephora in brazil. Corynespora cassiicola is an ascomycetes fungus with a broad host range and diverse life styles. A total of 651 isolates of cucumber corynespora leaf spot fungus corynespora cassiicola collected from cucumber in japan, either with 438 isolates or without 2 isolates a prior histo ry of boscalid use, were tested for their sensitivity to boscalid by using a mycelial growth inhibition method on. Several lineages of this pathogen have been recognized, but the classification of isolates into clades is timeconsuming and still sometimes leads to unclear results.
Corynespora cassiicola is an important pathogen because its responsible for a considerable loss of crop production and yield. Subcutaneous infection caused by corynespora cassiicola, a. Brazil is the worlds second major producer of coffea canephora solitary or coalesce and form extensive irregular lesions. Mostly known as a necrotrophic plant pathogen, it has also been associated with rare cases of human infection. Cca corynespora blight and target spot corynespora cassiicola gc powdery mildew golovinomyces cichoracearum ccu scab and gummosis cladosporium cucumerinum kgmmv kyuri green mottle mosaic virus cgmmv cucumber green mottle mosaic virus pcu downy mildew pseudoperonospora cubensis. Frontiers compounds released by the biocontrol yeast. Strobilurins and related compounds are prone to the development of resistance and should be rotated with other chemistries. Phaeohyphomycosis caused by a plant pathogen, corynespora. Pdf corynespora brown spot of papaya corynespora cassiicola. The molecular detection of corynespora cassiicola on. Only a single, historical clinical case of human infection caused by c. Genomic insight into pathogenicity of dematiaceous fungus. Evaluation of fungicides against target leaf spot caused by corynespora cassiicola. Corynespora cassiicola corycaoverview eppo global database.
Transcriptome and mirna analyses of the response to. Cotton isolates had little diversity at the genome level and very. Corynespora cassiicola was pathogenic on the roots and hypocotyls of soybean seedlings grown in infested soil at ottawa. Aug 31, 2018 corynespora cassiicola infection is common in plants, but the human corynespora cassiicola infection in our report is rare according to the literature. It is a reemerge pathogen on cotton in southeastern us.
Similarly, the phylogenetic analysis of 30 isolates of c. An indirect phenotyping method was developed in order to estimate the susceptibility of rubber tree clonal varieties to corynespora leaf fall clf disease caused by the ascomycete corynespora cassiicola. This fungus is present in some hevea rubber plantations and nurseries in hainan and yunnan provinces of south china. We are setup to allow easy downloads of individual projects and dont provide means to download whole collections of data.
The yellowish area surrounding the lesion can be seen only against the light. A new record of leaf spot disease on aquilaria malaccensis lamk in india. A case of phaeohyphomycosis caused by corynespora cassiicola. The organism was isolated and identified as corynespora cassiicola according to its morphological characteristics and gene. Whole genome sequences of four cotton and one soybean isolate from tennessee were used to develop single nucleotide polymorphism markers for cotton isolates. Unlimited viewing of the articlechapter pdf and any associated supplements and figures. Twelve new chromone derivatives, corynechromones al 112, were isolated from the spongederived fungus corynespora cassiicola xs200900i7. Later, the lesions become brown, necrotic, slightly sunken, with brownreddish margins. Cotton, cowpea, cucumber, eggplant, sesame, soybean, tobacco. Few studies referred to the formation of chlamydospores by c. Sobers the first report of corynespora cassiicola berk. Phylloplane fungi % biological control % corynespora % rubber % antagonism. Frontiers genomewide analysis of corynespora cassiicola. Corynespora cassiicola from cotton and soybean in the southeastern united.
The isolation ofum591 from a patients contact lens indicates the pathogenic. Detection of corynespora cassiicola in hevea rubber tree. Chromone derivatives from a spongederived strain of the. Two single nucleotide polymorphisms snps were detected in the internal transcribed spacer region of the nuclear ribosomal dna rdnaits of 21 corynespora cassiicola isolates obtained from a number of hevea clones grown in rubber plantations in.
No known resistance to target spot is currently available in commercial cultivars. Arvind kumar kurre, meghchand dewangan and dantre, r. Unlimited viewing of the articlechapter pdf and any associated supplements and. Evaluation of fungicides against target leaf spot caused. Clonality and geographic structure of hostspecialized. A total of 651 isolates of cucumber corynespora leaf spot fungus corynespora cassiicola collected from cucumber in japan, either with 438 isolates or without 2 isolates a prior history of boscalid use, were tested for their sensitivity to boscalid by using a mycelial growth inhibition method on yba agar medium. Corynespora cassiicola is a common plant pathogen that causes leaf spot disease in a broad range of crop, and it heavily affect rubber trees in malaysia hsueh, 2011. Here we confirm the occurrence of this species as an agent of subcutaneous phaeohyphomycosis. Pdf chlamydospore formation by corynespora cassiicola. Pdf intraspecific variability of corynespora cassiicola. These climatic conditions would limit the ability of the pathogen to. The organism was isolated and identified as corynespora cassiicola according to its morphological characteristics and. Corynespora cassiicola from soybean to carbendazim and prothioconazole. Sensitivity of corynespora cassiicola from soybean to carbendazim and prothioconazole sheila a.
Gao wei 1,2, li baoju 2, wang wanli 1, hao yongjuan 1, shi yanxia 2. Cca corynespora blight and target spot corynespora cassiicola gc powdery mildew golovinomyces cichoracearum ccu scab and gummosis cladosporium cucumerinum kgmmv kyuri green mottle mosaic virus cgmmv cucumber green mottle mosaic virus pcu downy mildew pseudoperonospora cubensis cmv cucumber mosaic virus prsv papaya ringspot virus. Detection of corynespora cassiicola in soil with realtime. Red, lesions enlarged, coalesced, and finally covered the entire leaves of cucumber. A new foliar disease, corynespora leaf spot, has been detected in arkansas cotton travis faske extension plant pathologist corynespora leaf spot has been detected in several commercial cotton fields on a few varieties fm 1944, st 5458, and phy 499 in. Eco ri, msp i and rsa i endonucleases identified all isolates as corynespora cassiicola. Our raw reads are also published to sra at ncbi for bulk download needs. Diagnostic features of corynespora cassiicola and its. Genome sequences and snp analyses of corynespora cassiicola.
Corynespora cassiicola infection is common in plants, but the human corynespora cassiicola infection in our report is rare according to the literature. Suppression by red light irradiation of corynespora leaf. Initial characterization of corynespora cassiicola affecting florida tomatoes pdf. Although variation in aggressiveness to cotton and tomato were observed, no genetic diversity. Corynespora brown spot of papaya corynespora cassiicola.
In other words, the leaf wetness is likely a major environmental factor driving the disease for this fungal pathogen. The causal organism was isolated in pure culture and identified ascorynespora cassiicola berk. Ripe fruits and abaxial surfaces of the leaves were significantly more susceptible to infection than unripe fruits and adaxial surfaces of leaves. Growth sensitivity of corynespora cassiicola to thiophanate. Mar 28, 2017 corynespora cassiicola was consistently isolated from the leaf spots on inoculated lettuce plants following the same method that was used for the initial isolations. B hyphae with septa black arrow in the edematous papillary dermis periodic. Documents about corynespora cassiicola coryca this website uses cookies our website uses cookies to ensure that we give you the best possible online experience. Detection of corynespora cassiicola in soil with realtime quantitative pcr. In the last few decades it has become one of the most destructive foliar and fruit diseases of tomato in the state mackenzie et al. Diagnostic features of corynespora cassiicola and its associated diseases identifying c. Corynespora cassiicola is causing numerous emerging diseases, including target spot of cotton a disease is emerging if increase in host range, geographic range, or incidence is. The present study combines the examination of toxins produced by c.
Diversity of the cassiicolin gene in corynespora cassiicola and relation with the pathogenicity in hevea brasiliensis. Corynespora cassiicola attackes diverse agriculturally important plants, including soybean and cotton, in the us. Infection process of corynespora cassiicola tagged with gfp on hevea brasiliensis article pdf available in australasian plant pathology 435. Pdf the fungus corynespora cassiicola is an important pathogen that causes necrotic lesions in several plant species. Pdf symptomatology, hosts, and pathogenicity of corynespora. Saprophytism and parasitism habits of plants are common survival strategies for this pathogen. For your convenience and fast downloads you can use globus and api. A necrotic subcutaneous lesions over the dorsal aspects of both hands with purulent discharge in a patient with chronic subcutaneous infection caused by corynespora cassiicola. Corynespora cassiicola berk and curt wei, incitant of leaf spot of brinjal, survives at the room temperatures 2830 c. The symptom is characterized by a papery center surrounded by a yellow halo. Growth and sporulation of the fungus on several media.
Pdf first report of corynespora cassiicola causing leaf and. Corynespora cassiicola is causing numerous emerging diseases, including target spot of cotton a disease is emerging if increase in host range, geographic range, or incidence is observed, or new strains evolve. The risk corynespora cassiicola would pose to california is evaluated below. Evaluation phylloplane fungi as biocontrol agent of corynespora lea. Initial characterization of corynespora cassiicola affecting florida tomatoes. The isolate, which on cotton is pathogenic only to bolls, is considered to be different from a strain ofc. Differentiation of corynespora cassiicola and cercospora sp. Previous studies revealed that populations from the three hosts are genetically distinct and host specialized. In rest of the cultivars, the occurrence of this fungus was very poor to nil. Transformation of corynespora cassiicola by agrobacterium. On the lower surface, small, light brownish, somewhat soakedwater lesions appear first. Pdf purification and characterization of cassiicolin.
Download fulltext pdf download fulltext pdf physiological characterization of corynespora cassiicola isolates article pdf available in tropical plant pathology 384. Pdf effects of corynespora cassiicola on lantana camara. Decalactone derivatives from corynespora cassiicola, an. The isolation of um 591 from a patients contact lens indicates the pathogenic potential of this dematiaceous fungus in human. Sensitivity of corynespora cassiicola from soybean to.
However, no polymorphisms were found at the its sequences. Sensitivity of corynespora cassiicola from soybean to carbendazim and prothioconazole article pdf available in tropical plant pathology 385. Frequency distribution of ec 50 values gml for thiophanatemethyl from 40 greenhousecollected isolates of corynespora cassiicola from african violet in 2007 displayed with a maximum xaxis value of 1. Pdf sensitivity of corynespora cassiicola from soybean to. He found that the fungus was pathogenic to leaves of hydrangea, hydrangea macrophylla ser.
Corynespora cassiicola is a common pathogen of grasses and other herbaceous plants in the tropics 3,4. Corynespora cassiicola is a species of fungus well known as a plant pathogen. Chemical investigation of the ethyl acetate extract of corynespora cassiicola, isolated from leaf tissues of the chinese mangrove medicinal plant laguncularia racemosa, yielded four new secondary metabolites, including three decalactones, xestodecalactones df as well as corynesidone c 4, in addition to four known compounds. Hofs inhibit corynespora cassiicola growth in vitro and protect glycine max plants against this pathogen. Corynespora cassiicola appeared to be a minor pathogen for okra. Purification and characterization of cassiicolin, the toxin produced by corynespora cassiicola, causal agent of the leaf fall disease of rubber tree. Structural analysis of cassiicolin, a hostselective. Suppression by red light irradiation of corynespora leaf spot. We report a case of subcutaneous phaeohyphomycosis caused by a plant pathogen in a patient with acute heart failure.
An updated phylogenetic classification of corynespora. Borah r k, ahmed f s, sarmah g s, bhabesh gogoi, 2012. Two primer pairs showed specificity to corynespora cassiicola and one primer pair showed specificity to. Pathogenicity of corynespora cassiicola on different hosts. Growth inhibition was evaluated measuring the diameter of the. Pathogenicity of corynespora cassiicola on soybean canadian. Pdf infection process of corynespora cassiicola tagged. Target spot of tomato, caused by corynespora cassiicola, was first reported in florida in 1972. Genetic variation of 42 isolates of corynespora cassiicola, a destructive fungal pathogen of many economically important crop plants including rubber, was. Two primer pairs showed specificity to corynespora cassiicola and one primer pair showed specificity to cercospora sp. Several lineages of this pathogen have been recognized, but the classification of isolates into clades is timeconsuming and still sometimes leads to.
Corynespora cassiicola is the causal organism of the most devastating leaf disease of rubber in sri lanka. A new foliar disease, corynespora leaf spot, has been. Corynespora cassiicola corycadocuments eppo global database. The effect of red light irradiation on development of corynespora leaf spot of cucumber plants cucumis sativus l. Frequency distribution of ec 50 values for tetramycin against 91 corynespora cassiicola isolates obtained from different cities in shandong, as based on a mycelial growth, b spore germination, and c germ tube elongation at several concentrations.
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