Rxivist logo

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

By Vahid Omidvar, Sheshanka Dugyala, Ashok Litwin-Kumar, Susan Rottschaefer, Marisa E. Miller, Mick Ayliffe, Matthew J. Moscou, Shahryar F. Kianian, Melania Figueroa

Posted 13 Mar 2018
bioRxiv DOI: 10.1101/281568 (published DOI: 10.1094/phyto-03-18-0084-r)

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.

Download data

  • Downloaded 442 times
  • Download rankings, all-time:
    • Site-wide: 33,619 out of 83,702
    • In pathology: 115 out of 470
  • Year to date:
    • Site-wide: 44,304 out of 83,702
  • Since beginning of last month:
    • Site-wide: 50,765 out of 83,702

Altmetric data


Downloads over time

Distribution of downloads per paper, site-wide


PanLingua

Sign up for the Rxivist weekly newsletter! (Click here for more details.)


News