Colletotrichum Species Pathogenicity and Phylogenetic Analysis

Colletotrichum species represent a globally significant group of fungal pathogens responsible for anthracnose diseases on a wide range of crops and ornamentals. These pathogens induce necrotic lesions on leaves, fruits and stems, often following a latent phase that complicates early detection. Accurate delimitation of species within this genus is essential because closely related taxa can exhibit distinct host ranges, virulence profiles and sensitivities to control measures. Traditional morphological criteria have proved insufficient to resolve cryptic diversity, prompting the adoption of multilocus sequence analysis and coalescent-based approaches. Phylogenetic frameworks now integrate data from regions such as the internal transcribed spacer, β-tubulin, actin, glyceraldehyde-3-phosphate dehydrogenase and calmodulin loci, yielding robust species boundaries and revealing species complexes. Such insights underpin tailored management strategies, from fungicide selection to the development of resistant cultivars, and inform quarantine and biosecurity policies. Recent advances in genomic sequencing and population genetics are further elucidating patterns of recombination, clonal dispersal and host adaptation, thereby offering new avenues to mitigate economic losses and safeguard food security.

Research from Nature Portfolio

Recent experimental work has elucidated the complex interactions between Colletotrichum gloeosporioides and Fusarium acutatum in onion, demonstrating that co-infection can synergistically enhance symptom severity when combined with gibberellic acid. Pathogenicity assays confirmed that each fungus induces distinct symptomatology—twisting by C. gloeosporioides and neck elongation by F. acutatum—while dual inoculation with hormone application yielded a more aggressive disease complex. This study highlights the importance of examining pathogen interactions and their modulation by plant growth regulators in disease outbreaks.

Foundational phylogenetic research on tea-associated Colletotrichum in China employed a multi-locus approach to resolve eleven species, including several novel taxa, from diseased Camellia sinensis leaves. By combining morphological observations with concatenated loci such as ApMat and glutamine synthetase sequences, researchers clarified species boundaries within the C. gloeosporioides complex and identified dominant invasive species. Pathogenicity tests revealed differential aggressiveness among taxa, reinforcing the link between phylogenetic placement and disease potential.

Colletotrichum Species Pathogenicity and Phylogenetic Analysis publication trend

The graph below shows the total number of articles in colletotrichum species pathogenicity and phylogenetic analysis across all publications each year (not limited to Nature Index journals).

Technical terms

Anthracnose: A disease syndrome characterised by sunken, necrotic lesions on plant tissues caused by various fungal pathogens.

Phylogenetic analysis: A method of inferring evolutionary relationships among organisms based on genetic sequence data.

Multilocus sequence analysis: An approach that uses DNA sequences from several gene regions to improve resolution of species boundaries and relationships.

Internal transcribed spacer (ITS): A ribosomal DNA region widely employed as a genetic barcode for fungal identification.

Species complex: A group of closely related organisms that are genetically distinct yet morphologically similar, requiring molecular tools for differentiation.

Koch’s postulates: A set of criteria used to establish a causal relationship between a microorganism and a disease.

References

1. Diversity of Colletotrichum species associated with anthracnose on Euonymus japonicus and their sensitivity to fungicides. Frontiers in Plant Science (2024).
2. Mango anthracnose disease: the current situation and direction for future research. Frontiers in Microbiology (2023).
3. Colletotrichum truncatum Causing Anthracnose of Tomato (Solanum lycopersicum L.) in Malaysia. Microorganisms (2023).
4. Insights into the cumulative effect of Colletotrichum gloeosporioides and Fusarium acutatum causing anthracnose-twister disease complex of onion. Scientific Reports (2024).
5. Diverse Colletotrichum species cause anthracnose of tea plants (Camellia sinensis (L.) O. Kuntze) in China. Scientific Reports (2016).
6. Species boundaries in plant pathogenic fungi: a Colletotrichum case study. BMC Ecology and Evolution (2016).