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
 Global Change and Photosynthesis Research: Urbana, IL
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Midwest Area Urbana, Illinois Global Change and Photosynthesis 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
                                            GILLESPIE, KELLY - UNIVERSITY OF ILLINOISitem
                                            CHAE, JUNE - UNIVERSITY OF ILLINOISitem
                                            LEAKEY, ANDREW D - UNIVERSITY OF ILLINOISitem
                                            Ainsworth, Elizabeth

                                                         - *Lisa*
  Submitted to: American Society of Plant Biologists
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 4/1/2006
                                    Publication  Date: 8/5/2006
                                    Citation: Gillespie, K.M., Chae, J.M., Leakey, A.B., Ainsworth, E.A. 2006. How will future elevated levels of CO2 and O3 affect antioxidant metabolism in soybean? [abstract]. American Society of Plant Biologists. Paper No. P02014.Interpretive Summary:
                                Technical Abstract: Immense research efforts have been devoted to characterizing the effects of global change on plants, particularly elevated concentrations of CO2 and O3.  While the physiological responses of plants to elevated [CO2] and [O3] have been well characterized, the molecular and biochemical mechanisms by which physiology is affected are still mostly unknown.  A key process that remains to be understood is the oxidative stress response.  Once ozone enters the leaf through the stomata, it is immediately converted into various reactive oxygen species (ROS).  This leads to oxidation and loss of protein function in internal tissue.  A coordinated set of enzymes and metabolites, called the antioxidant system, quenches these harmful ROS.  While the antioxidant system is up regulated in plants grown under elevated [O3], these plants still incur oxidative damage.  Research regarding responses of the antioxidant system to elevated [CO2] is ambiguous.  In some studies, antioxidants are down regulated, and in other studies they are up regulated.  How the combination of elevated [CO2] and [O3] affect antioxidant metabolism is unknown.  The aim of our research is to investigate how antioxidant capacity of soybean (Glycine max Merr.) is affected by season-long treatment with elevated [CO2] (550 ppm) and [O3] (1.2 x ambient).   We have taken samples at 6 developmental stages throughout the 2005 growing season at the Soybean Free Air gas Concentration Enrichment (SoyFACE) facility, and have analyzed them for total antioxidant capacity.  These experiments describe how the antioxidant capacity of soybean leaves may differ in atmospheric conditions predicted for 2050. Future work will link changes in the activity of anti-oxidant enzymes and expression of transcripts to changes in total antioxidant capacity.


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