Host-Pathogen Interactions Between Phytophthora infestans and the Solanaceous Hosts Calibrachoa × hybridus, Petunia × hybrida, and Nicotiana benthamiana

Plant Disease
M C BecktellW E Fry

Abstract

Late blight, caused by the pathogen Phytophthora infestans, is a devastating disease of potato and tomato, but can also damage other solanaceous hosts. To gain a better understanding of the interaction between P. infestans and these other hosts, the susceptibility of species in three solanaceous genera was investigated. Of the 10 Calibrachoa × hybridus cultivars tested, four were susceptible and six were resistant to the pathogen; susceptible cultivars supported only very limited growth of P. infestans. The majority of the Petunia × hybrida (petunia) cultivars were susceptible, although less so than susceptible potatoes or tomatoes. Two petunia cultivars displayed differential resistance, suggesting the presence of R genes against P. infestans. The hypersensitive response was present in susceptible, partially resistant, and resistant petunia-P. infestans interactions, but was predominant in the resistant interaction. Young petunias (3 weeks) were more susceptible than older petunias (7 weeks). Nicotiana benthamiana was susceptible to all four P. infestans isolates tested in the lab and became infected during a field epidemic. Several of these isolates were tested for the presence of the inf1 gene, and were found to have and exp...Continue Reading

References

Jan 1, 1997·Molecular Plant-microbe Interactions : MPMI·S KamounF Govers
May 14, 1999·Trends in Plant Science·S KamounV G Vleeshouwers
May 1, 1994·Applied and Environmental Microbiology·S KamounB M Tyler
Jul 1, 1998·Plant Disease·Gregory A ForbesWilliam E Fry

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Citations

Nov 1, 2006·Molecular Plant Pathology·Vivianne G A A VleeshouwersSophien Kamoun
Aug 19, 2008·Molecular Plant Pathology·William Fry
Apr 8, 2009·Molecular Plant-microbe Interactions : MPMI·Mathieu A PelEdwin A G Van der Vossen
Aug 31, 2017·Phytopathology·József FodorMiklós Pogány
Aug 1, 2007·Plant Disease·Christine D SmartWilliam E Fry

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