Alguns fungos do Brasil: XII - Fungi imperfecti - Melanconiales (com 11 estampas e 2 figuras no texto)

Viégas, A. P.

doi:10.1590/s0006-87051946000100001

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…Notes : Eucalyptus is not a well-known disease reservoir for Colletotrichum species. Colletotrichum eucalypti was described from Brazil by Bitancourt ( 1927 ) and noted again by Viégas ( 1946 ) from the Campinas region, causing anthracnose of Eucalyptus leaves. Viégas described the species as having conidia that are elongate-fusiform to oblong and 10–20 × 3–5 μm in size; the description is reminiscent of the C. acutatum species complex, but cultures are not available, we have not seen type material, and the species was described from a different continent.…”

Section: Resultsmentioning

confidence: 94%

The Colletotrichum acutatum species complex

Damm¹,

Cannon²,

Woudenberg³

et al. 2012

Studies in Mycology

744

650

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Colletotrichum acutatum is known as an important anthracnose pathogen of a wide range of host plants worldwide. Numerous studies have reported subgroups within the C. acutatum species complex. Multilocus molecular phylogenetic analysis (ITS, ACT, TUB2, CHS-1, GAPDH, HIS3) of 331 strains previously identified as C. acutatum and other related taxa, including strains from numerous hosts with wide geographic distributions, confirmed the molecular groups previously recognised and identified a series of novel taxa. Thirty-one species are accepted, of which 21 have not previously been recognised. Colletotrichum orchidophilum clusters basal to the C. acutatum species complex. There is a high phenotypic diversity within this complex, and some of the species appear to have preferences to specific hosts or geographical regions. Others appear to be plurivorous and are present in multiple regions. In this study, only C. salicis and C. rhombiforme formed sexual morphs in culture, although sexual morphs have been described from other taxa (especially as laboratory crosses), and there is evidence of hybridisation between different species. One species with similar morphology to C. acutatum but not belonging to this species complex was also described here as new, namely C. pseudoacutatum.Taxonomic novelties:New combinations - Colletotrichum limetticola (R.E. Clausen) Damm, P.F. Cannon & Crous, C. lupini (Bondar) Damm, P.F. Cannon & Crous, C. salicis (Fuckel) Damm, P.F. Cannon & Crous. New species - C. acerbum Damm, P.F. Cannon & Crous, C. australe Damm, P.F. Cannon & Crous, C. brisbanense Damm, P.F. Cannon & Crous, C. cosmi Damm, P.F. Cannon & Crous, C. costaricense Damm, P.F. Cannon & Crous, C. cuscutae Damm, P.F. Cannon & Crous, C. guajavae Damm, P.F. Cannon & Crous, C. indonesiense Damm, P.F. Cannon & Crous, C. johnstonii Damm, P.F. Cannon & Crous, C. kinghornii Damm, P.F. Cannon & Crous, C. laticiphilum Damm, P.F. Cannon & Crous, C. melonis Damm, P.F. Cannon & Crous, C. orchidophilum Damm, P.F. Cannon & Crous, C. paxtonii Damm, P.F. Cannon & Crous, C. pseudoacutatum Damm, P.F. Cannon & Crous C. pyricola Damm, P.F. Cannon & Crous, C. rhombiforme Damm, P.F. Cannon & Crous, C. scovillei Damm, P.F. Cannon & Crous, C. sloanei Damm, P.F. Cannon & Crous, C. tamarilloi Damm, P.F. Cannon & Crous, C. walleri Damm, P.F. Cannon & Crous. Typifications: Epitypifications - C. acutatum J.H. Simmonds, C. limetticola (R.E. Clausen) Damm, P.F. Cannon & Crous, C. nymphaeae (Pass.) Aa, C. phormii (Henn.) D.F. Farr & Rossman, C. salicis (Fuckel) Damm, P.F. Cannon & Crous. Lectotypifications - C. nymphaeae (Pass.) Aa, C. orchidearum Allesch.

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Section: Resultsmentioning

confidence: 94%

The Colletotrichum acutatum species complex

Damm¹,

Cannon²,

Woudenberg³

et al. 2012

Studies in Mycology

744

650

View full text Add to dashboard Cite

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“…cephalosporioides is a valid name (Viegas, 1946) that was applied to the etiological agent of cotton ramulosis by Costa and Fraga Jr. (1939), who considered the pathogen to be a more aggressive variety of C. gossypii. However, the status of the name C. gossypii is uncertain since no type material remains, and no DNA sequence of authenticated strains is available for comparative phylogenetic studies.…”

Section: Discussionmentioning

confidence: 99%

“…At this time, it was considered a more aggressive form of C. gossypii, a previously described cotton pathogen in the USA (Atkinson, 1891;Southworth,1890). In 1946, Viegas validated the name of this variety, providing a Latin description and denoting a type (Viegas, 1946). Ever since, this name has been widely applied to the pathogen causing ramulosis of cotton in Brazil (Kirkpatrick & Rothrock, 2001;Monteiro et al, 2009;Silva-Mann et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

The etiological agent of cotton ramulosis represents a single phylogenetic lineage within the Colletotrichum gloeosporioides species complex

Salustiano¹,

Rondon²,

Abreu³

et al. 2014

Trop. plant pathol.

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Ramulosis of cotton, caused by Colletotrichum gossypii var. cephalosporioides (CGC), is an important disease of cotton in Brazil. The main objective of this work was to test whether CGC is a phylogenetic species inside the Colletotrichum gloeosporioides species complex. A Bayesian inference phylogenetic analysis of a combined ITS and TUB2 dataset was conducted with 21 strains identified as CGC and five strains of Colletotrichum gossypii (CG), associated with cotton anthracnose, obtained from diseased plants from different regions of Brazil. All CGC strains formed a highly supported lineage inside the clade of Colletotrichum theobromicola, a member of the C. gloeosporioides species complex. CG strains formed another lineage in the same clade. These findings were supported by a second analysis conducted with three genes (ITS+TUB2+GAPDH) and a subset of five CGC and three CG strains. During pathogenicity tests, all five CGC strains tested induced typical symptoms of ramulosis on inoculated plants, including foliar necrosis, death of apical meristems and over sprouting. Plants inoculated with CG strains exhibited foliar necrotic spots two months after inoculation. These results give phylogenetic support for the placement of CGC in the C. gloeosporioides species complex, and the distinction between the ramulosis and anthracnose pathogens of cotton in Brazil.

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“…The species C. gossypii, described by Southworth in 1890 (VIÉGAS, 1946), was subsequently reported by Arx (1957) as belonging to the C. gloeosporioides group, with Glomerella cingulata as the teleomorph. In cotton plants, the cephalosporioides variety, the causal agent of ramulosis, reported by Costa and Fraga (1937) and described by Costa in 1946(VIÉGAS, 1946, was first identified in the State of São Paulo, associated with the witch's broom symptoms, which were not observed in the strains that cause anthracnose.…”

Section: Introductionmentioning

confidence: 97%

“…In cotton plants, the cephalosporioides variety, the causal agent of ramulosis, reported by Costa and Fraga (1937) and described by Costa in 1946(VIÉGAS, 1946, was first identified in the State of São Paulo, associated with the witch's broom symptoms, which were not observed in the strains that cause anthracnose. Sutton (1992) considered Colletotrichum gossypii var.…”

Section: Introductionmentioning

confidence: 99%

Variability of seed-borne Colletotrichum strains in cotton based on ITS1 and ITS2 ribossomal genes analysis

Carvalho¹,

Figueira²,

Machado³

et al. 2015

Biosci. J.

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ABSTRACT:The use of DNA sequences analysis has been an important mean to distinguish and to identify populations of organisms at different levels. By molecular markers several complex organisms have been successful detected in plants for distinct aims. Ribosomal DNA (rDNA) has been used to evaluate genetic variability, microorganism phylogeny and to develop specific primers for detection of plant pathogens in plant tissues. In this study, the objective was to characterize isolates of Colletotrichum gossypii var. cephalosporioides and Colletotrichum gossypii, collected in different regions of Brazil, by analyzing the nucleotide sequence of rDNA regions. ITS1, ITS2, and the intervening 5.8S gene were amplified by PCR and their sequences compared to each other and to those from other species registered in the GenBank. The rDNA of isolates associated with Gossypium spp. showed sequence identities ranging from 96 to 100% in the ITS1 region, 98 to 100% in the 5.8S gene, and 97 to 100% in the ITS2 region. The sequences were submitted to UPGMA analysis, and according to the phylogenetic trees, the C. gossypii var. cephalosporioides and C. gossypii species clustered together along with isolates of Glomerella cingulata from mango and papaya, and thus no distinction could be made between isolates of those organisms.

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Alguns fungos do Brasil: XII - Fungi imperfecti - Melanconiales (com 11 estampas e 2 figuras no texto)

Cited by 5 publications

References 5 publications

The Colletotrichum acutatum species complex

The Colletotrichum acutatum species complex

The etiological agent of cotton ramulosis represents a single phylogenetic lineage within the Colletotrichum gloeosporioides species complex

Variability of seed-borne Colletotrichum strains in cotton based on ITS1 and ITS2 ribossomal genes analysis

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