(CPOK)-Phytophthora infestans

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Domain: Eukaryota

Phylum: Oomycota

Class: Oomycetes

Order: Peronosporale

Family: Pythiaceae


Genus species: Phytopthora

Alternate name(s) of this species: Phytophthora blight

Description and Significance

Phytophthora infestans (P.infestans) are oomycete plant pathogens that acts as obligate parasites to potato and tomato plants causing Late Blight Disease. They can affect other members of the Solanaceae family such as nightstands, and tomatillos (4). P.infestans are similar to fungi as they grow as mycelium and produce spores that can be aerially dispersed Its popularity is due to being the major culprit for the 1845 Great Irish Famine and 1846 Highland Potato Famine (2). Its importance is seen significantly in biosecurity, as it poses a serious threat to the potato and tomato industry.

Life Cycle, Cell Structure, Metabolism

Interesting features of the life cycle, spores produced, reproductive features; how it gains energy; what important molecules it produces.

Genome Structure

Describe the size and content of the genome. How many chromosomes? Other interesting features? What is known about its sequence?

Ecology and Pathogenesis

Habitat; symbiosis; environmental or industrial relevance; contributions to environment.
If relevant, how does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as host symptoms.


[Sample reference] Takai, K., Sugai, A., Itoh, T., and Horikoshi, K. "Palaeococcus ferrophilus gen. nov., sp. nov., a barophilic, hyperthermophilic archaeon from a deep-sea hydrothermal vent chimney". International Journal of Systematic and Evolutionary Microbiology. 2000. Volume 50. p. 489-500.


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