Susceptibility of Corn to Isolates of Colletotrichum graminicola Pathogenic to Other Grasses

Jamil, F. F.; Nicholson, Ralph L.

doi:10.1094/pd-71-0809

Cited by 30 publications

(15 citation statements)

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“…Wilson sensu stricto Sutton 1980 is reserved for the fungus pathogenic to corn, with each species uniquely characterized by their molecular identities at the ITS1/ 5.8S/ITS2, MAT1-2, and SOD2 loci and their host range. These physiological host range limitations are well documented in the literature (2,6,12,20,36,38,40,41,43,44,72,73) and correspond with the emended phylogenetic species described in this paper. Since C. cereale likely has a much more extensive host range as a pathogen than that which is explicitly described in this manuscript, we emphasize that it is the pattern of fixed differences on the molecular level and the association with grasses of the Pooideae that serve uniquely to distinguish this species, rather than strict pathogenicity criteria.…”

Section: Discussionsupporting

confidence: 83%

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Unraveling Evolutionary Relationships Among the Divergent Lineages of Colletotrichum Causing Anthracnose Disease in Turfgrass and Corn

Crouch¹,

Clarke²,

Hillman³

2006

Phytopathology®

109

104

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Colletotrichum species cause anthracnose diseases on a number of grass hosts and are common inhabitants of many others. They are divided into four species: C. sublineolum is pathogenic to Sorghum spp.; C. caudatum is found on C4 grasses such as indiangrass and big bluestem; C. falcatum causes red rot of sugarcane; and C. graminicola sensu lato is a broadly defined species including isolates that attack maize, wheat, oats, and many forage, turf, and amenity grasses of the subfamily Pooideae. In this paper, a combination of hierarchal- and nonhierarchal-based analyses were employed to examine evolutionary relationships among the grass-infecting Colletotrichum species, with special emphasis on isolates from turf and other grasses in the subfamily Pooideae. Reconstructions performed with data sets from over 100 Colletotrichum isolates at three variable loci using phylogenetic and network-based methodologies unambiguously supported the taxonomic separation of maize-infecting isolates of C. graminicola from the pooid-infecting strains of Colletotrichum. To reflect the evolutionary relationships that exist between these distinct lineages, we propose the resurrection of the species name C. cereale to describe the pooid-infecting isolates. There was also support for further subdivision of C. cereale, but the current data are insufficient to confidently subdivide the species, as there was some evidence of recombination between lineages of this species.

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Section: Discussionsupporting

confidence: 83%

“…C. sublineolum is the validly established taxon describing Colletotrichum associated with sorghum; this distinction has been repeatedly confirmed through morphological examinations (10,12,25,(59)(60)(61), host range and pathogenicity testing (6,12,20,36,40), and molecular analyses (12,19,25,31,45,52,55,56,67,68, this study).…”

Section: Colletotrichum Cerealesupporting

confidence: 53%

Unraveling Evolutionary Relationships Among the Divergent Lineages of Colletotrichum Causing Anthracnose Disease in Turfgrass and Corn

Crouch¹,

Clarke²,

Hillman³

2006

Phytopathology®

109

104

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“…Colletotrichum graminicola and C. sublineolum also infect only Z. mays and S. bicolor, respectively, and they never infect E. utilis. These comparable results were reported previously (Le Beau 1950;Nishihara 1961;Jamil and Nicholoson 1987). Distinct host specifi city was recognized in these plant inoculation tests.…”

Section: Resultssupporting

confidence: 92%

Colletotrichum echinochloae, a new species on Japanese barnyard millet (Echinochloa utilis)

Moriwaki

Tsukiboshi

2009

Mycoscience

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“…Colletotrichum graminicola (Ces.) Wils., and C. sublineola Henn., cause economically important anthracnose leaf blight and stalk rot diseases of maize ( Zea mays L.), and sorghum ( Sorghum bicolor [L.] Moench), respectively [3–6]. These two fungal sibling species are morphologically very similar, but reproductively isolated [5].…”

Section: Introductionmentioning

confidence: 99%

A comparative genomic analysis of putative pathogenicity genes in the host-specific sibling species Colletotrichum graminicola and Colletotrichum sublineola

et al. 2017

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Background Colletotrichum graminicola and C. sublineola cause anthracnose leaf and stalk diseases of maize and sorghum, respectively. In spite of their close evolutionary relationship, the two species are completely host-specific. Host specificity is often attributed to pathogen virulence factors, including specialized secondary metabolites (SSM), and small-secreted protein (SSP) effectors. Genes relevant to these categories were manually annotated in two co-occurring, contemporaneous strains of C. graminicola and C. sublineola. A comparative genomic and phylogenetic analysis was performed to address the evolutionary relationships among these and other divergent gene families in the two strains.ResultsInoculation of maize with C. sublineola, or of sorghum with C. graminicola, resulted in rapid plant cell death at, or just after, the point of penetration. The two fungal genomes were very similar. More than 50% of the assemblies could be directly aligned, and more than 80% of the gene models were syntenous. More than 90% of the predicted proteins had orthologs in both species. Genes lacking orthologs in the other species (non-conserved genes) included many predicted to encode SSM-associated proteins and SSPs. Other common groups of non-conserved proteins included transporters, transcription factors, and CAZymes. Only 32 SSP genes appeared to be specific to C. graminicola, and 21 to C. sublineola. None of the SSM-associated genes were lineage-specific. Two different strains of C. graminicola, and three strains of C. sublineola, differed in no more than 1% percent of gene sequences from one another.ConclusionsEfficient non-host recognition of C. sublineola by maize, and of C. graminicola by sorghum, was observed in epidermal cells as a rapid deployment of visible resistance responses and plant cell death. Numerous non-conserved SSP and SSM-associated predicted proteins that could play a role in this non-host recognition were identified. Additional categories of genes that were also highly divergent suggested an important role for co-evolutionary adaptation to specific host environmental factors, in addition to aspects of initial recognition, in host specificity. This work provides a foundation for future functional studies aimed at clarifying the roles of these proteins, and the possibility of manipulating them to improve management of these two economically important diseases.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-016-3457-9) contains supplementary material, which is available to authorized users.

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Susceptibility of Corn to Isolates of Colletotrichum graminicola Pathogenic to Other Grasses

Cited by 30 publications

References 0 publications

Unraveling Evolutionary Relationships Among the Divergent Lineages of Colletotrichum Causing Anthracnose Disease in Turfgrass and Corn

Unraveling Evolutionary Relationships Among the Divergent Lineages of Colletotrichum Causing Anthracnose Disease in Turfgrass and Corn

Colletotrichum echinochloae, a new species on Japanese barnyard millet (Echinochloa utilis)

A comparative genomic analysis of putative pathogenicity genes in the host-specific sibling species Colletotrichum graminicola and Colletotrichum sublineola

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