(CPOK)-Phytophthora infestans

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Ecology and Pathogenesis

Temperature is a determinant of how rapidly Late Blight Disease can spread. P. infestans are found in moist and cool weather environments, and warmer temperatures give rise to higher lesion growth rates. The pathogen’s sporangia and sporangiophores can be seen on the lower foliage surface of potato and tomato leaves and stems. The symptoms of the pathogen include dark blotches on leaf tips and stems, dark patches on tubers, and dark maroon patches inside the plant’s skin. The persistence of the pathogen is attributed to environmental factors such as moisture, soil, and pH. To control the growth of P. infestans there exists biocontrol efforts such as Lysobacter strains. These strains produce extracellular enzymes that have been known to be used as biological agents for plant diseases (4). However, the effectiveness of Lysobacter can be altered with temperature, as the temperature can contribute to the physiological characteristics of the Lysobacter strains and the microbial communities that reside within the blight disease infected plants. P. infestans is a concerning problem in agriculture as it the most destructive disease of potato, contributing to an annual worldwide crop loss of $6.7 billion USD.

References

1. Haas, B., Kamoun, S., Zody, M. et al. Genome sequence and analysis of the Irish potato famine pathogen Phytophthora infestans. Nature 461, 393–398 (2009) doi:10.1038/nature08358

2. Leesutthiphonchai, Wiphawee (2018). How Does Phytophthora infestans Evade Control Efforts? Modern Insight Into the Late Blight Disease. APS Publications.

3. Puopolo, G., Palmieri, M.C., Giovannini, O. et al. BioControl (2015) 60: 681. https://doi.org/10.1007/s10526-015-9672-5 4 Schoina C., Govers F. (2015) The Oomycete Phytophthora infestans, the Irish Potato Famine Pathogen. In: Lugtenberg B. (eds) Principles of Plant-Microbe Interactions. Springer, Cham

4. Schoina C., Govers F. (2015) The Oomycete Phytophthora infestans, the Irish Potato Famine Pathogen. In: Lugtenberg B. (eds) Principles of Plant-Microbe Interactions. Springer, Cham

Author

Page authored by Chansorena Pok, student of Dr. Marc Orbach, University of Arizona .