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
 Corn Insects and Crop Genetics Research: Ames, IA
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Database Projects
                        MaizeGDB
                                    SoyBase
                                    PeanutBase
                                    Legume Information System
                                    Maize Newsletter
                                    Maize Mutant Phenotypes
                                    Maize Genetics Conference
                                    Shiny Soybase CNV
                                    Shiny Soybase SNP
                                    Common Bean and Alfalfa - PvGEA
                                    Common Bean and Alfalfa - AGEDSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Midwest Area Ames, Iowa Corn Insects and Crop Genetics 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

Title:   Author  item
                                            MOSCOU, M - IOWA STATE UNIVERSITYitem
                                            CALDO, R - IOWA STATE UNIVERSITYitem
                                            Lauter, Nicholasitem
                                            Wise, Roger
  Submitted to: Book Chapter
                                    Publication Type: Book / Chapter
                                    Publication Acceptance Date: 3/20/2008
                                    Publication  Date: 7/1/2008
                                    Citation: Moscou, M.J., Caldo, R.A., Lauter, N.C., Wise, R.P. 2008. Construction of Coexpression Networks to Explore Barley-Powdery Mildew Interactions. In:  Lorito, M., Woo, S.L., Scala, F., editors. Biology of Plant Microbe Interactions:  The Impact of "omics." Volume 6. St. Paul, MN: APS Press. p. 113-117.Interpretive Summary:
                                Technical Abstract: The interactions between an obligate biotrophic fungus and its plant host could be characterized as a counter-balancing act; as the fungus attempts to maximize nutrient siphoning and colonization, the host aims to restrict nutrient loss while minimizing the cost of defense. To establish biotrophy, the fungus must penetrate cell walls and construct haustorial feeding structures. To survive and reproduce, the pathogen must keep the tissue it has invaded alive and photosynthetically productive. Plants initially activate basal defenses to limit penetration and haustorial development, but typically resort to defenses that aim to starve the invaders. These range from local programmed cell death to rapid senescence of entire leaves. As such, it appears that plants are able to deploy defenses incrementally, allowing them to mount a sufficient but not unnecessary response. By contrast, pathogens may attempt to maximize biotrophy by capitalizing on the host’s resource expenditures for defense.

Recent studies in nonhost resistance, as well as host susceptibility, indicate that genes other than those governed by Resistance-Avirulence interactions also play key roles. Accordingly, we were also interested in identifying pathways where the pathogen co-opts networks, proteins, or metabolites that are synthesized by the host. In order to identify genes in such pathways, we constructed a coexpression network using time-course data collected from nine barley genotypes. Three criteria were used: (1) differential expression upon contact with the pathogen, (2) conserved expression with other genes (clusters) within a genotype, and (3) gene clusters that are conserved in their coexpression across all genotypes, regardless of wild-type or mutant status. Here we report our characterization of several sub-networks containing genes involved in sugar transport, photosynthesis, signaling, protein secretion, signal peptide processing, and abiotic stress signaling.


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