Lack of host specificity of <i>Colletotrichum</i> spp. isolates associated with anthracnose symptoms on mango in Brazil

Souza, Andressa de; Carboni, Roberta Cristina Delphino; Wickert, Ester; Lemos, Eliana Gertrudes de Macedo; Goes, António de

doi:10.1111/ppa.12021

Cited by 23 publications

(9 citation statements)

References 28 publications

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“…Similar results were obtained by Souza et al (2013) who could not relate the place of origin to genetic diversity in the characterization of C. gloeosporioides of mango, as well as Denoyes- Rothan et al (2013), who showed similar results for C. gloeosporioides and C. acutatum of strawberry.…”

Section: Issr Analysissupporting

confidence: 82%

GENETIC DIVERSITY OF ISOLATES OF Colletotrichum spp. IN BANANA

et al. 2019

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Colletotrichum spp. is a pathogenic fungus of great importance in banana cultivation since it affects the fruit both in the field and in the post-harvest period, depreciating its commercial value. Although this disease is widely distributed in regions of banana cultivation, the different levels of aggression suggest the existence of genetic variability among Colletotrichum spp. isolates. The objective of the present study was therefore to verify the genetic diversity of Colletotrichum spp. in banana fruits presenting anthracnose symptoms using both molecular marker ISSR and morphological characterization. We obtained 30 isolates of the fungus from banana fruits from different states of Brazil and performed molecular characterization with five primers using the ISSR-PCR technique. The results were used to construct a dendrogram, relating the isolates according to their genetic proximity. The morphocultural characterization was performed by analyzing colony coloration and growth rate. These methods allowed us to reveal genetic and morphocultural variability among isolates.

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Section: Issr Analysissupporting

confidence: 82%

GENETIC DIVERSITY OF ISOLATES OF Colletotrichum spp. IN BANANA

et al. 2019

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“…For example, Souza et al . () reported that C. gloeosporioides and C. acutatum isolated from either mango or citrus could cause anthracnose symptoms on leaves of mango cultivars Palmen and Tommy Atkins and blossom blight symptoms in citrus flowers. These results indicate a lack of host specificity of Colletotrichum species.…”

Section: Discussionmentioning

confidence: 99%

Most Colletotrichum species associated with tree tomato (Solanum betaceum) and mango (Mangifera indica) crops are not host‐specific

Cabrera

Rojas

et al. 2018

Plant Pathology

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An important constraint for crop production in Colombia is the high incidence of anthracnose caused by Colletotrichum species. Although several studies have focused on these fungi, the relationship between the different fungal species within the genus and their hosts and whether they display any host preference or host specificity has yet to be examined. In Colombia, diseases caused by Colletotrichum species are particularly severe in mango (Mangifera indica) and tree tomato (Solanum betaceum) crops. In a previous investigation, the Colletotrichum phylogenetic species attacking these crops were identified. The present study aimed to determine whether isolates collected from tree tomato and mango showed host preference or host specificity by assessing aggressiveness, spore density, latent period, and fitness of each strain on the two hosts. In the departments of Cundinamarca and Tolima, Colombia, isolates were collected from plants that presented typical anthracnose symptoms and were identified as C. acutatum, C. asianum, C. boninense, C. gloeosporioides, C. tamarilloi and C. theobromicola. Inoculation of conidia of each isolate onto both hosts showed isolates had no host preference and only the C. gloeosporioides isolate showed host specificity. However, in general, isolates produced a higher spore density when inoculated on the alternate host, which may indicate a difference in the degree of adaptation to each host. Statistical analyses of the assessed parameter values revealed that isolates use different infection strategies when infecting each host. In light of these results, the implications of using quantitative estimations of fitness when studying fungal pathogens are discussed.

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“…Surprisingly, isolates CCP6, CCC18 and CCG14 were more pathogenic on alternative hosts. Similarly, it has been found that C. acutatum and C. gloeosporioides isolates caused anthracnose symptoms on different plants, both by artificial cross‐infection and under field conditions in Brazil and Australia (Whitelaw‐Weckert et al ., ; Souza et al ., ), indicating a lack of host specificity. This phenomenon may favour the migration of the pathogen from one host to another, even more if these hosts are planted in surrounding areas, as occurs in Mexico.…”

Section: Discussionmentioning

confidence: 99%

Characterization of Colletotrichum truncatum from papaya, pepper and physic nut based on phylogeny, morphology and pathogenicity

et al. 2017

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Colletotrichum truncatum (syn. C. capsici) has been identified as the causal agent of anthracnose on various hosts, predominantly pepper (Capsicum spp.) plants. The aim of this study was to determine whether C. truncatum isolates infecting papaya, pepper and physic nut in southeastern Mexico are morphologically, genetically and pathogenically different, in order to improve disease management strategies. A total of 113 C. truncatum isolates collected from five producer states were subjected to phenotypic characterization and divided into six different morphological groups. These morphological traits and the location of the isolates were used to select a subset of 20 isolates for further studies. Differences in the pathogenicity of the isolates were tested with a cross‐inoculation assay using pepper, papaya and physic nut. The pathogenicity tests revealed that all isolates could infect the three hosts and produce typical anthracnose symptoms, indicating a lack of host specificity for this species and therefore its pathogenic potential on other plants. Phylogenetic analysis using internal transcribed spacer (ITS) and glyceraldehyde 3‐phosphate dehydrogenase (GAPDH) sequences of the C. truncatum isolates from this study and reference strains was performed, grouping the isolates into a monophyletic clade. This study reports for the first time the characterization of C. truncatum causing anthracnose disease on three different hosts in Mexico.

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Lack of host specificity of Colletotrichum spp. isolates associated with anthracnose symptoms on mango in Brazil

Cited by 23 publications

References 28 publications

GENETIC DIVERSITY OF ISOLATES OF Colletotrichum spp. IN BANANA

GENETIC DIVERSITY OF ISOLATES OF Colletotrichum spp. IN BANANA

Most Colletotrichum species associated with tree tomato (Solanum betaceum) and mango (Mangifera indica) crops are not host‐specific

Characterization of Colletotrichum truncatum from papaya, pepper and physic nut based on phylogeny, morphology and pathogenicity

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