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Title: Dual RNA-seq of the plant pathogen phytophthora ramorum and its tanoak host

Author: Hayden, Katherine J.; Garbelotto, Matteo; Knaus, Brian J.; Cronn, Richard C.; Rai, Hardeep; Wright, Jessica W.;

Date: 2014

Source: Tree Genetics & Genomes

Publication Series: Scientific Journal (JRNL)

Description: Emergent diseases are an ever-increasing threat to forests and forest ecosystems and necessitate the development of research tools for species that often may have few preexisting resources. We sequenced the mRNA expressed by the sudden oak death pathogen Phytophthora ramorum and its most susceptible forest host, tanoak, within the same tissue at two time points after inoculation, and in uninfected tanoak controls. Using the P. ramorum genome to differentiate host and pathogen transcripts, we detected more than 850 P. ramorum transcripts at 5 days post-inoculation and a concurrent upregulation of host genes usually associated with pathogenicity. At 1 day, in contrast, we did not detect pathogen expression or significant enrichment of functional categories of host transcripts relative to controls, highlighting the importance of sequencing depth for in planta studies of host– pathogen interactions. This study highlights processes in molecular host–pathogen interactions in forest trees and provides a first reference transcriptome for tanoak, allowing the preliminary identification of disease-related genes in this study and facilitating future work for this and other members of the family Fagaceae.

Keywords: Hemibiotroph, Host–pathogen interactions, Oomycete, Pathogenesis, Sudden oak death

Publication Notes:

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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Hayden, Katherine J.; Garbelotto, Matteo; Knaus, Brian J.; Cronn, Richard C.; Rai, Hardeep; Wright, Jessica W. 2014. Dual RNA-seq of the plant pathogen phytophthora ramorum and its tanoak host. Tree Genetics & Genomes. 10: 489-502.

 


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