Erwinia amylovora psychrotrophic adaptations: evidence of pathogenic potential and survival at temperate and low environmental temperatures

PeerJ
Ricardo D Santander, Elena G Biosca

Abstract

The fire blight pathogen Erwinia amylovora can be considered a psychrotrophic bacterial species since it can grow at temperatures ranging from 4 °C to 37 °C, with an optimum of 28 °C. In many plant pathogens the expression of virulence determinants is restricted to a certain range of temperatures. In the case of E. amylovora, temperatures above 18 °C are required for blossom blight epidemics under field conditions. Moreover, this bacterium is able to infect a variety of host tissues/organs apart from flowers, but it is still unknown how environmental temperatures, especially those below 18 °C, affect the pathogen ability to cause fire blight disease symptoms in such tissues/organs. There is also scarce information on how temperatures below 18 °C affect the E. amylovora starvation-survival responses, which might determine its persistence in the environment and probably contribute to the seasonal development of fire blight disease, as occurs in other pathogens. To characterize the virulence and survival of E. amylovora at temperate and low temperatures, we evaluated the effect of three temperatures (4 °C, 14 °C, 28 °C) on symptom development, and on different parameters linked to starvation and virulence. E. amylovora was pathoge...Continue Reading

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Citations

Oct 28, 2018·Applied and Environmental Microbiology·Roshni R KharadiGeorge W Sundin
Feb 7, 2020·Plant Disease·Anna E Wallis, Kerik D Cox
Jun 12, 2018·Frontiers in Microbiology·Paula M M MartinsAlessandra A De Souza
Oct 11, 2020·FEMS Microbiology Ecology·Ricardo D SantanderElena G Biosca
Nov 15, 2020·Journal of Experimental Botany·Marco ZarattiniMathilde Fagard

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Methods Mentioned

BETA
PCR
environmental stress
Flow cytometry

Software Mentioned

IMAGEJ
BD
ACT

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