U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Crop Production and Pest Control Research: West Lafayette, IN
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Midwest Area West Lafayette, Indiana Crop Production and Pest Control Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications
- Small Grains Viral Disease Laboratory
- Corn and Sorghum Fungal Disease Laboratory
- Host Plant Resistance to Insects Laboratory
- Wheat/Hessian fly Interactions Laboratory
- Small Grains Fungal Disease Laboratory
- Soybean Quality Improvement Laboratory
- Uniform Soybean Tests, Northern Region

Title:   Author  item
                                            Goodwin, Stephen

                                                         - *Steve*item
                                            Breeden, Jillitem
                                            STEVENS, JOHN - PURDUE UNIVERSITYitem
                                            DOERGE, R - PURDUE UNIVERSITY
  Submitted to: Plant and Animal Genome Conference
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 12/1/2004
                                    Publication  Date: 1/15/2005
                                    Citation: Goodwin, S.B., Breeden, J.D., Stevens, J., Doerge, R.W. 2005. Non-host resistance of barley to the septoria tritici blotch pathogen of wheat involves an active defense response. Plant and Animal Genome Conference XIII, January 15-19, 2005, San Diego, CA. p. 688.  Available: http://www.intl-pag.org/13/abstracts/PAG13_P688.htmlInterpretive Summary:
                                Technical Abstract: Barley possesses specific resistance (R) genes against the speckled leaf blotch pathogen Septoria passerinii and is a non host for the Septoria tritici blotch pathogen of wheat, Mycosphaerella graminicola.  The specific mechanisms of resistance to these hemibiotrophic pathogens, and whether they involve active host responses, are not known.  The Affymetrix Barley GeneChip Array was used to test the hypothesis that non-host resistance of barley to M. graminicola is an active response.  Barley plants inoculated with i) a compatible isolate of S. passerinii (susceptible response) ii) an incompatible isolate of S. passerinii (R-gene response), and iii) an isolate of M. graminicola (non-host response), were collected at 0, 5, 12 and 24 hours after inoculation with two biological replications and water-inoculated controls at each time point.  Numerous genes were significantly up or down regulated during each treatment.  From 99 to 1,789 genes had significantly increased expression during the non-host resistance response relative to the water-inoculated controls among the four sampling times.  Many of these genes are the same as those induced during R-gene resistance responses of barley to biotrophic pathogens and in other host species, including pathogenesis-related proteins,transporters, jasmonate-induced proteins, and transcription factors.  Recognition and signal-transduction genes included NBS-LRR-type and other leucine-rich-repeat receptor proteins and numerous kinases.  Genes with significantly down-regulated expression also were identified, mostly involving photosynthesis and DNA replication.  These data and analyses demonstrate that non-host resistance in barley to M. graminicola is an active response similar to those induced during R-gene interactions with biotrophic pathogens.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov