Modelling the in vitro pre-infection dynamics of Colletotrichum spp. isolated from yellow passion fruit in function of environmental variables
Velame, K. V. C.; Santos-Filho, H. P.; Lima, A. d. A.; Braganca, C. A. D.; Laranjeira, F. F.
Show abstract
Brazil is the largest world producer of yellow passion fruit, but the mean yield (14.3t.ha-1) is less than half the potential of the crop. Part of this difference can be explained by plant health problems, including anthracnose caused by Colletotrichum spp. In regions with favorable climatic conditions, anthracnose can be a factor of significant yield reduction, but these regions have not yet been zoned. The objective of this study was to model the pre-infection dynamics of the fungus. The influence of temperature and photoperiod was studied on mycelia growth, sporulation and conidia germination. Mathematical models were fitted to the results and the optima for the environmental variables were estimated. The maximum mycelia growth was estimated to occur at 26.5{degrees}C. Between 24.5{degrees}C and 28.5{degrees}C the fungus grew from 95% to 100% of the estimated maximum. Temperatures below 13{degrees}C or above 34{degrees}C were harmful to mycelia growth. Temperatures over 26{degrees}C were the most favorable to sporulation while below 13{degrees}C sporulation was only 5% of the maximum. Optimum germination occurred between 25{degrees}C and 29{degrees}C with the ideal wetness period between 11h and 13h. These results can be used as a basis for zoning the risk of anthracnose occurrence in passion fruit producing regions.\n\nSignificance and Impact of the StudyMany diseases affect the yellow passion fruit crop, limiting its yield; among them anthracnose, caused by Colletotrichum spp. The disease occurs in both field (leaf and stem symptoms) and post-harvest (fruits) conditions. Understanding the role environmental conditions play in the biological cycle of such diseases is essential for developing management strategies. By modelling mycelial growth, spore production and spore germination of Colletotrichum spp. as affected by temperature, photoperiod and wetness period, it was possible to characterize the pathogens pre-infectional dynamics. The results should be used as a first approximation to estimate the risk of anthracnose occurrence in pre- or post-harvest.
Matching journals
The top 4 journals account for 50% of the predicted probability mass.
Similar papers in this journal
- Molecular Identification and Antimicrobial Potential of Endophytic Fungi Against Some Grapevine Pathogens 96%
- Characterization of Metarhizium majus (Hypocreales: Clavicipitaceae) isolated from the Western Cape province, South Africa 96%
- Reference genes for gene expression analysis in the fungal pathogen Neonectria ditissima and their use demonstrating expression up-regulation of candidate virulence genes 95%
Similar papers in this journal
- Degenerated virulence and irregular development of Fusarium oxysporum f. sp. niveum induced by successive subculture 96%
- Peptaibol Production and Characterization from Trichoderma asperellum and their Action as Biofungicide. 96%
- Pathogenic and genetic diversity of Sclerotium rolfsii, the causal agent of Southern blight of common bean in Uganda 96%
Similar papers in this journal
- Electrical information flows across the sporocarps of two ectomycorrhizal fungi in the field 95%
- Population dynamics of fruit flies (Diptera: Tephritidae) in a semirural area under subtropical monsoon climate of Bangladesh 95%
- Fungal succession on the decomposition of three plant species from a Brazilian mangrove 93%
Similar papers in this journal
- Grapevine pruning time affects natural wound colonization by wood-invading fungi 94%
- Resolving host and species boundaries for perithecia-producing nectriaceous fungi across the central Appalachian Mountains 93%
- Besides stem canker severity, oilseed rape host genotype matters for the production of Leptosphaeria maculans fruiting bodies 92%
Similar papers in this journal
- Inoculum and disease dynamics of citrus greasy spot caused by Zasmidium citri-griseum in sweet orange in Panama 97%
- Double trouble or a blessing in disguise? Co-infection of potato with the causal agents of late and early blight 95%
- Pea-Saving Partners: Bacillus and Pseudomonas combat downy mildew in pea crops 94%
"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.