Publication Date
1997
Description
Impact of climate change on plant diseases is poorly understood due to the paucity of studies in this area. A process-based approach to quantify the impact on pathogen/disease cycle is potentially the most useful in defining impact of factors like elevated CO2 on plant diseases. This study establishes the influence of twice-ambient CO2 on components of the anthracnose disease cycle caused by Colletotrichum gloeosporioides in the tropical pasture legume Stylosanthes scabra. Compared to ambient CO2, at 700 ppm, time between inoculation and symptom appearance (incubation period) and percentage leaf area diseased were significantly reduced in the two cultivars Fitzroy and Seca; time to appearance of sporulating lesions (latent period) remained unaffected; while spore production per unit diseased tissue increased significantly. Further research is needed to determine if increased spore production and a more favourable microclimate under elevated CO2 may lead to rapid development of more damaging pathotypes.
Citation
Chakraborty, Sukumar, "How Will Plant Diseases Impact on Pasture Production Under Climate Change: A Case Study of Stylosanthes Anthracnose" (2024). IGC Proceedings (1997-2023). 3.
https://uknowledge.uky.edu/igc/1997/session9/3
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
How Will Plant Diseases Impact on Pasture Production Under Climate Change: A Case Study of Stylosanthes Anthracnose
Impact of climate change on plant diseases is poorly understood due to the paucity of studies in this area. A process-based approach to quantify the impact on pathogen/disease cycle is potentially the most useful in defining impact of factors like elevated CO2 on plant diseases. This study establishes the influence of twice-ambient CO2 on components of the anthracnose disease cycle caused by Colletotrichum gloeosporioides in the tropical pasture legume Stylosanthes scabra. Compared to ambient CO2, at 700 ppm, time between inoculation and symptom appearance (incubation period) and percentage leaf area diseased were significantly reduced in the two cultivars Fitzroy and Seca; time to appearance of sporulating lesions (latent period) remained unaffected; while spore production per unit diseased tissue increased significantly. Further research is needed to determine if increased spore production and a more favourable microclimate under elevated CO2 may lead to rapid development of more damaging pathotypes.
