Detection of race-specific resistance against Puccinia coronata f. sp. avenae in Brachypodium species

Vahid Omidvar, Sheshanka Dugyala, Feng Li, Susan M. Rottschaefer, Marisa E. Miller, Mick Ayliffe, Matthew J. Moscou, Shahryar F. Kianian, Melania Figueroa

Research output: Contribution to journalArticle

Abstract

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 nonhost 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 whether effector-triggered immunity contributes to nonhost resistance to P. coronata f. sp. avenae in Brachypodium spp.

Original languageEnglish (US)
Pages (from-to)1443-1454
Number of pages12
JournalPhytopathology
Volume108
Issue number12
DOIs
StatePublished - Dec 2018

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Puccinia coronata
Brachypodium
vertical resistance
oats
crown rust
Brachypodium distachyon
foliar diseases
jasmonic acid
salicylic acid
signs and symptoms (plants)
ethylene
reactive oxygen species
inheritance (genetics)
immunity
phenotype
pathogens
genotype
genes

Cite this

Omidvar, V., Dugyala, S., Li, F., Rottschaefer, S. M., Miller, M. E., Ayliffe, M., ... Figueroa, M. (2018). Detection of race-specific resistance against Puccinia coronata f. sp. avenae in Brachypodium species. Phytopathology, 108(12), 1443-1454. https://doi.org/10.1094/PHYTO-03-18-0084-R

Detection of race-specific resistance against Puccinia coronata f. sp. avenae in Brachypodium species. / Omidvar, Vahid; Dugyala, Sheshanka; Li, Feng; Rottschaefer, Susan M.; Miller, Marisa E.; Ayliffe, Mick; Moscou, Matthew J.; Kianian, Shahryar F.; Figueroa, Melania.

In: Phytopathology, Vol. 108, No. 12, 12.2018, p. 1443-1454.

Research output: Contribution to journalArticle

Omidvar, V, Dugyala, S, Li, F, Rottschaefer, SM, Miller, ME, Ayliffe, M, Moscou, MJ, Kianian, SF & Figueroa, M 2018, 'Detection of race-specific resistance against Puccinia coronata f. sp. avenae in Brachypodium species', Phytopathology, vol. 108, no. 12, pp. 1443-1454. https://doi.org/10.1094/PHYTO-03-18-0084-R
Omidvar V, Dugyala S, Li F, Rottschaefer SM, Miller ME, Ayliffe M et al. Detection of race-specific resistance against Puccinia coronata f. sp. avenae in Brachypodium species. Phytopathology. 2018 Dec;108(12):1443-1454. https://doi.org/10.1094/PHYTO-03-18-0084-R
Omidvar, Vahid ; Dugyala, Sheshanka ; Li, Feng ; Rottschaefer, Susan M. ; Miller, Marisa E. ; Ayliffe, Mick ; Moscou, Matthew J. ; Kianian, Shahryar F. ; Figueroa, Melania. / Detection of race-specific resistance against Puccinia coronata f. sp. avenae in Brachypodium species. In: Phytopathology. 2018 ; Vol. 108, No. 12. pp. 1443-1454.
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