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Microorganisms
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Colletotrichum Pathogens in Plants
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Colletotrichum Pathogens in Plants

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Plant Microbe Interactions".

Deadline for manuscript submissions: 15 July 2025 | Viewed by 6131

Special Issue Editor

Dr. Laurent Penet

E-Mail Website
Guest Editor
Department of Plant Health and Environment, French National Institute for Agriculture, Food, and Environment (INRAE), UR ASTRO, F-97170, Petit-Bourg, France
Interests: colletotrichum

Special Issue Information

Dear Colleagues,

Colletotrichum fungi are pathogens commonly found in crops and more generally in wild plants. Today, these fungi are extensively classified in 14 species complexes via spore morphology and sequencing, and great progress was made regarding taxonomy in recent decades. However, there are still obstacles in ascertaining relationships between species and complexes, and in bridging these relationships to their ecologies at large, including infection and disease dynamics. Indeed, while taxonomic knowledge greatly improved recently, many questions regarding the natural history of these complexes remain open, especially in light of taxonomical progress and in relation to diversity dynamics and speciation in the genus. In this Special Issue, we will explore both taxonomic and ecological research fronts on Colletotrichum species complexes. We welcome contributions on large-scale or fine-scale phylogeny within the genus, and also studies on host range, host evolution, diversity, and natural flora, as well as genetic diversity and gene admixtures within and between the complexes. A better understanding of taxonomy-relevant information, in combination of Colletotrichum interactions with plants and other species in natural communities of plant microbiomes, especially for crops, will indeed facilitate progress toward more resilient agriculture and sustainable disease management, both in fields and agricultural landscapes.

Dr. Laurent Penet
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Microorganisms is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • colletotrichum
  • host evolution
  • diversity
  • genetic diversity

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Published Papers (3 papers)

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Research

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18 pages, 10096 KiB  
Article
Volatile Organic Compounds Produced by Trichoderma asperellum with Antifungal Properties against Colletotrichum acutatum
by Mauricio Nahuam Chávez-Avilés, Margarita García-Álvarez, José Luis Ávila-Oviedo, Irving Hernández-Hernández, Paula Itzel Bautista-Ortega and Lourdes Iveth Macías-Rodríguez
Microorganisms 2024, 12(10), 2007; https://doi.org/10.3390/microorganisms12102007 - 3 Oct 2024
Cited by 3 | Viewed by 1402
Abstract
Managing plant diseases caused by phytopathogenic fungi, such as anthracnose caused by Colletotrichum species, is challenging. Different methods have been used to identify compounds with antibiotic properties. Trichoderma strains are a source of novel molecules with antifungal properties, including volatile organic compounds (VOCs), [...] Read more.
Managing plant diseases caused by phytopathogenic fungi, such as anthracnose caused by Colletotrichum species, is challenging. Different methods have been used to identify compounds with antibiotic properties. Trichoderma strains are a source of novel molecules with antifungal properties, including volatile organic compounds (VOCs), whose production is influenced by the nutrient content of the medium. In this study, we assessed the VOCs produced in dual confrontation systems performed in two culture media by Trichoderma strains (T. atroviride IMI206040, T. asperellum T1 and T3, and Trichoderma sp. T2) on Colletotrichum acutatum. We analysed the VOC profiles using gas chromatography coupled with mass spectrometry. The Luria Bertani (LB) medium stimulated the production of VOCs with antifungal properties in most systems. We identified 2-pentyl furan, dimethyl disulfide, and α-phellandrene and determined their antifungal activity in vitro. The equimolar mixture of those VOCs (250 µM ea.) resulted in 14% C. acutatum diametral growth inhibition. The infective ability and disease severity caused by the mycelia exposed to the VOCs mixture were notably diminished in strawberry leaves. Application of these VOCs as biofumigants may contribute to the management of anthracnose. LB represents a feasible strategy for identifying novel VOCs produced by Trichoderma strains with antifungal properties. Full article
(This article belongs to the Special Issue Colletotrichum Pathogens in Plants)
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13 pages, 294 KiB  
Article
New Species-Specific Real-Time PCR Assays for Colletotrichum Species Causing Bitter Rot of Apple
by Diana J. McHenry and Srđan G. Aćimović
Microorganisms 2024, 12(5), 878; https://doi.org/10.3390/microorganisms12050878 - 27 Apr 2024
Cited by 4 | Viewed by 2154
Abstract
Bitter rot of apple is an economically important worldwide disease caused by different Colletotrichum species, depending on many factors such as climate, geography, other hosts, and crop management practices. Culture, morphology, and single-locus sequencing-based methods for identifying the Colletotrichum species are severely limited [...] Read more.
Bitter rot of apple is an economically important worldwide disease caused by different Colletotrichum species, depending on many factors such as climate, geography, other hosts, and crop management practices. Culture, morphology, and single-locus sequencing-based methods for identifying the Colletotrichum species are severely limited in effectiveness, while the multilocus sequence typing methods available for delineating species are costly, time-intensive, and require high expertise. We developed species-specific hydrolysis probe real-time PCR assays for the following nine Colletotrichum species causing bitter rot in the Mid-Atlantic U.S.A.: C. fructicola, C. chrysophilum, C. noveboracense, C. gloeosporioides s.s., C. henanense, C. siamense and C. theobromicola from the C. gloeosporioides species complex, and C. fioriniae and C. nymphaeae from the C. acutatum species complex. After searching 14 gene regions, we designed primers and probes in 5 of them for the nine target species. Four primer–probe set pairs were able to be duplexed. Sensitivity tests showed as little as 0.5 pg DNA were detectable. These real-time PCR assays will provide rapid and reliable identification of these key Colletotrichum species and will be critically important for studies aiming to elucidate their biology, epidemiology, and management on apples as the number one produced and consumed tree fruit in the U.S.A. Full article
(This article belongs to the Special Issue Colletotrichum Pathogens in Plants)

Review

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19 pages, 811 KiB  
Review
Uncovering the Host Range–Lifestyle Relationship in the Endophytic and Anthracnose Pathogenic Genus Colletotrichum
by Jacy Newfeld, Ren Ujimatsu and Kei Hiruma
Microorganisms 2025, 13(2), 428; https://doi.org/10.3390/microorganisms13020428 - 16 Feb 2025
Viewed by 610
Abstract
Colletotrichum includes agriculturally and scientifically important pathogens that infect numerous plants. They can also adopt an endophytic lifestyle, refraining from causing disease and/or even promoting plant growth when inoculated on a non-susceptible host. In this manner, the host range of a Colletotrichum fungus [...] Read more.
Colletotrichum includes agriculturally and scientifically important pathogens that infect numerous plants. They can also adopt an endophytic lifestyle, refraining from causing disease and/or even promoting plant growth when inoculated on a non-susceptible host. In this manner, the host range of a Colletotrichum fungus can shift, depending on whether it exhibits endophytic or pathogenic lifestyles. Some fungi, such as Colletotrichum tofieldiae, can even shift between pathogenicity and endophytism within the same host depending on the environmental conditions. Here, we aim to disentangle the relationship between lifestyle and host range in Colletotrichum. Specifically, we aim to demonstrate that lifestyle is dependent on the host colonized in many Colletotrichum fungi. We discuss the ways in which pathogenic Colletotrichum species may act endophytically on alternative hosts, how comparative genomics has uncovered candidate molecules (namely effectors, CAZymes, and secondary metabolites) underlying fungal lifestyle, and the merits of using endophytic fungi alongside pathogenic fungi in research, which facilitates the use of reverse genetics to uncover molecular determinants of lifestyle. In particular, we reference the Arabidopsis thaliana–Colletotrichum tofieldiae study system as a model for elucidating the dual roles of plant–fungus interactions, both endophytic and pathogenic, through integrative omics approaches and reverse genetics. This is because C. tofieldiae contains closely related pathogens and endophytes, making it an ideal model for identifying candidate determinants of lifestyle. This approach could identify key molecular targets for effective pathogen management in agriculture. Lastly, we propose a model in which pathogenic lifestyle occupies a different host range than the endophytic lifestyle. This will enhance our understanding of pathogenicity and endophytism in a globally significant fungal genus and lay the groundwork for future research examining molecular determinants of lifestyle in plant-associated fungi. Full article
(This article belongs to the Special Issue Colletotrichum Pathogens in Plants)
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