Development of a model for Colletotrichum diseases with calibration for phylogenetic clades on different host plants

Abstract

Fungi in the genus Colletotrichum cause serious pre- and post-harvest losses to several agricultural crops worldwide. Through a systematic literature review, we retrieved the published information on Colletotrichum anthracnose diseases on different host plants and developed a mechanistic model incorporating the main stages of the pathogen’s life cycle and the effect of weather. The model predicts anthracnose progress during the growing season on the aerial organs of different crops, and was parameterized for seven Colletotrichum clades (acutatum, dematium, destructivum, gloeosporioides, graminicola, and orbiculare) and the singleton species, C. coccodes. The model was evaluated for the anthracnose diseases caused by fungi belonging to five clades on six hosts by using data from 17 epidemics that occurred in Italy, the USA, Canada, and Japan. A comparison of observed versus predicted data showed a concordance correlation coefficient of 0.928 and an average distance between real data and the fitted line of 0.044. After further validation, the model could be used to support decision-making for crop protection.

Determination of anthracnose (Colletotrichum fructicola) resistance mechanism using transcriptome analysis of resistant and susceptible pear (Pyrus pyrifolia)

“…Genes in red color were notably upregulated in ‘Cuiguan’ and ‘Seli’ after infection with C. fructicola. The morphological characteristics of C. fructicola conidia was exhibited as previous report [ 49 ] …”

A maize enzyme from the 2‐oxoglutarate‐dependent oxygenase family with unique kinetic properties, mediates resistance against pathogens and regulates senescence

“…Finally, we analyzed the role of Zm S5H during infection with Colletotrichum graminicola. C. graminicola is a maize pathogenic fungus that is the causal agents of Anthracnose Leaf Blight, which occurs after infection in different plant organs (Salotti et al, 2023; Sukno et al, 2008). This pathogen caused extensive yield losses worldwide; thus, it became a model pathogenic fungus for research in plant pathology (Salotti et al, 2023).…”

“…thus, it became a model pathogenic fungus for research in plant pathology (Salotti et al, 2023). When leaves of s5h Mu mutants and WT siblings were infected with Colletotrichum graminicola, s5h Mu leaves showed less symptoms than WT leaves when they were analyzed 6 and 13 days after infection (Figure 9a and b).…”

Resistance of cayenne pepper varieties (Capsicum frutescens) to anthracnose disease (Colletotrichum gloeosporioides) isolates from swampy areas

“…Anthracnose attacks have been shown to cause yield losses in chili crops ranging from 10-80% during the rainy season and 2-35% during the dry season (Widodo & Hidayat 2018). Aside from causing severe harvest losses, anthracnose epidemics can also diminish product quality (Salotti et al, 2023). Initially, infected fruits develop sunken lesions, followed by the appearance of dark gray to black spots with brown edges.…”

“…Rainwater splashes, residues of diseased plants in the soil, and surface water flow contribute to the disease spread (Oo & Oh, 2016). Epidemiologically, anthracnose follows a polycyclic life cycle where asexual spores (conidia), transported by water splashes, play a crucial role in the initiation and spread of the epidemic (Salotti et al, 2023).…”