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
                                            Sarath, Gautamitem
                                            Akin, Dannyitem
                                            Vogel, Kennethitem
                                            Mitchell, Robert

                                                         - *Rob*
  Submitted to: Applied Biochemistry and Biotechnology
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 1/29/2008
                                    Publication  Date: 7/1/2008
                                    Citation: Sarath, G., Akin, D.E., Vogel, K.P., Mitchell, R. 2008. Cell wall composition and accessibility to hydrolytic enzymes is differentially altered in divergently bred switchgrass (Panicum virgatum L.) genotypes. Applied Biochemistry and Biotechnology. 2008 Jul; 150: 1-14.Interpretive Summary: Switchgrass biomass is primarily composed of cell wall constituents.  The relative abundance of components such as cellulose lignin and phenolic acids can significantly influence biomass quality.  In this paper baseline information on cell wall chemistry has been elucidated for a range of switchgrass plants.  Our data highlight the different biomass-related quality parameters that can be exploited through breeding.
                                Technical Abstract: Switchgrass plants from two populations, C+3 developed by three breeding generations for high digestibility and C-1 developed by one generation of breeding for low digestibility, were used in this study  Above ground biomass from 12 selected genotypes, 3 each with high or low digestibility within each population were analyzed for their cell wall aromatics and polysaccharides.  The ratio of p-coumaric acid:ferulic acid  was greater (P< 0.05) for the high-lignin C-1 population over the low-lignin C+3 population, although the amounts of these two phenolics did not differ between populations.  Combined values of guaiacyl + syringyl-lignin were consistently higher in genotypes from the C-1 population as compared to the genotypes from the C+3 population. Overall, p-coumaric acid was released by enzymes in greater amounts than ferulic acid in all these genotypes. Genotypes in the C-1 population exhibited lower dry weight loss as compared to the genotypes in the C+3 population after enzymatic digestion, suggesting changes in cell wall architecture.  Overall our data highlight the phenotypic plasticity coded by the switchgrass genome and suggest that combining DMD with other more specific cell-wall traits could result in genotypes with greater utility as bioenergy feedstocks.


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