RT Journal Article
SR Electronic
T1 Detection of race-specific resistance against <em>Puccinia coronata</em> f. sp. <em>avenae</em> in <em>Brachypodium</em> species
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 281568
DO 10.1101/281568
A1 Vahid Omidvar
A1 Sheshanka Dugyala
A1 Feng Li
A1 Susan Rottschaefer
A1 Marisa E. Miller
A1 Mick Ayliffe
A1 Matthew J. Moscou
A1 Shahryar F. Kianian
A1 Melania Figueroa
YR 2018
UL http://biorxiv.org/content/early/2018/06/14/281568.abstract
AB Oat crown rust caused by Puccinia coronata f. sp. avenae is the most destructive foliar disease of cultivated oat. Characterization of genetic factors controlling resistance responses to Puccinia coronata f. sp. avenae in non-host species could provide new resources for developing disease protection strategies in oat. We examined symptom development and fungal colonization levels of a collection of Brachypodium distachyon and B. hybridum accessions infected with three North American P. coronata f. sp. avenae isolates. Our results demonstrated that colonization phenotypes are dependent on both host and pathogen genotypes, indicating a role for race-specific responses in these interactions. These responses were independent of the accumulation of reactive oxygen species. Expression analysis of several defense-related genes suggested that salicylic acid and ethylene-mediated signaling, but not jasmonic acid are components of resistance reaction to P. coronata f. sp. avenae. Our findings provide the basis to conduct a genetic inheritance study to examine if effector-triggered immunity contributes to non-host resistance to P. coronata f. sp. avenae in Brachypodium species.