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
                                            Ainsworth, Elizabeth

                                                         - *Lisa*item
                                            Rosenthal, Daviditem
                                            Nelson, Randall
  Submitted to: Keystone Symposia
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 1/17/2013
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: While the future crop growing environment is likely to be warmer and with more variable water available, the stimulation of C3 photosynthesis by elevated CO2 concentration provides a potential benefit of global climate change.  However, experimental field studies suggest that C3 crops fall short of the theoretical maximum stimulation in yield when grown at elevated CO2. This may be because crops are not adapted to current atmospheric CO2 concentrations, much less future elevated CO2 concentrations, and lack the sink capacity to maximize the potential gain in carbon from greater photosynthetic rates. However, only a tiny fraction of available germplasm has been screened for CO2 response. At the SoyFACE experiment in central Illinois, over 20 genotypes of soybean (Glycine max Merr.) have been screened for CO2 responsiveness. On average, seed yield is stimulated by ~15%; however, genotypes with a range of responses from no stimulation in yield to 25% stimulation in yield have been identified. We investigated the photosynthetic basis for variation in CO2 response in two soybean lines in an effort to determine mechanisms for maximizing yield responses to elevated CO2. Changes in photosynthetic acclimation as well as changes in partitioning of carbon to seed biomass underpin variation in soybean yield responses to elevated CO2. These results will be discussed in combination with efforts to transgenically modify soybean to maximizing its production in a high CO2 world.


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