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
 Plant Stress and Germplasm Development Research: Lubbock, TX
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Projects
                        NP 301Search small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Plains Area Lubbock, Texas Cropping Systems Research Laboratory Plant Stress and Germplasm Development 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
                                            Burke, Johnitem
                                            Chen, Junpingitem
                                            Burow, Gloriaitem
                                            ROSENOW, DARRELL - Texas Agrilifeitem
                                            MECHREF, YEHIA - Texas Tech Universityitem
                                            Payton, Paxtonitem
                                            Xin, Zhanguo
  Submitted to: Crop Science
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 4/18/2012
                                    Publication  Date: 3/8/2013
                                    Citation: Burke, J.J., Chen, J., Burow, G.B., Rosenow, D., Mechref, Y., Payton, P.R., Xin, Z. 2013. Leaf dhurrin content is a quantitative measure of the level of pre- and post-flowering drought tolerance in sorghum. Crop Science. 53(3):1056-1065.Interpretive Summary: Post-flowering drought tolerance (stay-green) is a key trait for increasing the production of sorghum.  Unfortunately, assessment of the stay-green phenotype is dependent on the occurrence of drought stress conditions at specific developmental stages in order to achieve meaningful evaluation. Thus, field-based evaluations, most of which are visual, of stay-green drought tolerance are notoriously difficult to perform and require growing lines in multiple locations across several years to achieve efficient selection for the trait.  We have identified a compound (dhurrin) whose accumulation in sorghum leaves correlates to the level of post-flowering drought tolerance and is highly correlated with the stay-green phenotype. Additionally, relationship between leaf dhurrin content and stay-green drought tolerance is stable across irrigation regimes and may be used as a screening tool during pre-flowering sorghum growth, eliminating the need for field-based screening and difficult visual ratings when environmental conditions are variable.
                                Technical Abstract: Post-flowering drought tolerance is a key trait for increasing the production of sorghum [Sorghum bicolor (L.) Moench] in Mediterranean and semiarid tropical climates.  The nonsenescent trait, stay-green, is the most significant criterion for assessing post flowering drought tolerance in sorghum.  However, assessment of the stay-green phenotype is dependent on the occurrence of drought stress conditions at specific developmental stages in order to achieve meaningful evaluation. Thus, field-based evaluations, most of which are visual, of stay-green drought tolerance are notoriously difficult to perform and require growing lines in multiple locations across several years to achieve efficient selection for the trait.  Here we report and demonstrate that leaf dhurrin [(S)-p-hydroxymandelonitrile-ß-D-glucopyranoside] content from irrigated or dryland sorghum is significantly correlated with the level of post-flowering drought tolerance of sorghum lines previously reported as stay-green.  The correlation between leaf dhurrin content and post-flowering drought tolerance provides the first quantitative measure of post-flowering stress tolerance from irrigated or dryland pre-flowering sorghum.


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