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
 Wheat, Sorghum and Forage Research: Lincoln, NE
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Plains Area Lincoln, Nebraska Wheat, Sorghum and Forage 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
                                            Sattler, Scottitem
                                            DELLAPENNA, DEAN - MICHIGAN STATE UNIVERSITY
  Submitted to: American Society of Plant Biologists Annual Meeting
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 4/6/2007
                                    Publication  Date: 7/7/2007
                                    Citation: Sattler, S.E., Dellapenna, D. 2007. Tocopherols modulate defense signaling by blocking the formation of nonenzymatic lipid peroxidation products during germination. American Society of Plant Biologists Annual Meeting. Abstract 1419Interpretive Summary:
                                Technical Abstract: Tocopherols (Vitamin E) are lipophilic antioxidants that are synthesized by all plants and are particularly abundant in seeds.  Two tocopherol deficient mutants, vitamin e (vte) 1 and 2, were used to examine the functions of tocopherols in germinating seedlings.  Only vte2 seedlings generated massively elevated levels of nonenzymatic lipid peroxidation products.  Global expression profiling using the Affymetrix ATH1 GeneChip showed that several defense-related genes were induced in vte2 relative to wild-type, while there was surprisingly little impact on gene expression in vte1 relative to wild-type in germinating seedlings.  The phytoalexin camalexin accumulated to significant levels in vte2 seedlings in the absence of any pathogens.  To characterize the function of tocopherols and nonenzymatic lipid peroxidation in defense signaling, a series of double mutants were constructed between vte2 and mutants affecting defense signaling or the generation of nonenzymatic lipid peroxidation products (NahG, SA; coi1, JA; ein2, ethylene; fad, fatty acid desaturation; and pad4).  Both biochemical and transcriptional analysis of vte2 and these double mutants demonstrate that nonenzymatic lipid peroxidation products play a significant role in triggering plant defense responses and that tocopherols mitigate these responses.  Together these results establish the critical role tocopherols play in controlling nonenzymatic lipid peroxidation during germination and early seedling development.


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