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
 Crops Pathology and Genetics Research: Davis, CA
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Outreach Events
                        UC Davis Picnic Day
                                    Kinders go to College
                                    STEM Girls
                                    Future Scientist Program
                                    Agriculture Future of America
                                    Wallace-Carver Fellowship
                                    Young Scholars Program
                                    Annual Awards Banquet
                    About Us
                        About Us
                                    Our Mission
                                    Principal InvestigatorsSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Pacific West Area Davis, California Crops Pathology and Genetics 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
- Etiology and Biology of Tree Crop Diseases
- Rice Genetics
- Sustainable Floriculture
- Sustainable Viticulture

Title:   Author  item
                                            CHOAT, BRENDAN - Australian National Universityitem
                                            DRAYTON, WILLIAM - University Of Californiaitem
                                            BRODERSEN, CRAIG - University Of Californiaitem
                                            MATTHEWS, MARK - University Of Californiaitem
                                            SHACKEL, KEN - University Of Californiaitem
                                            WADA, HIROSHI - University Of Californiaitem
                                            McElrone, Andrew
  Submitted to: Plant Cell and Environment
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 1/1/2010
                                    Publication  Date: 4/22/2010
                                    Citation: Choat, B., Drayton, W., Brodersen, C., Matthews, M., Shackel, K., Wada, H., Mcelrone, A.J. 2010. MEASUREMENT OF VULNERABILITY TO WATER STRESS-INDUCED CAVITTION IN GRAPEVINE: A COMPARISON OF FOUR TECHNIQUES APPLIED TO A LONG-VESSELED SPECIES. Plant Cell and Environment. doi: 10-1111/j.1365-3040.Interpretive Summary:
                                Technical Abstract: Grapevines are considered among the most vulnerable woody plant species to water stress-induced cavitation with embolism forming at slight tensions. However, we found that native embolism in stems of field grown Vitis vinifera cv. Chardonnay never exceeded 30% despite xylem water potentials ('x) reaching -1.33 MPa.  The discrepancy between these native embolism measurements and those of previous reports, led us to assess four separate methods commonly used to test vulnerability of woody plant stems to water stress-induced cavitation. Centrifuge, dehydration, and air-injection methods, which rely on measurement of percentage loss of hydraulic conductivity (PLC) in detached stems, were compared against non-invasive monitoring of xylem cavitation with Nuclear Magnetic Resonance (NMR) imaging. The results indicated that the centrifuge technique significantly over estimated vulnerability to cavitation compared with dehydration and air-injection techniques. The centrifuge method indicated that stems reached 90% loss of conductivity at stem xylem water potentials ('x) of -1.5 MPa, while the dehydration and air-injection measurements indicated that no significant embolism occurred above (less negative hydrostatic pressures) 'x of -2.0 MPa. Observations with NMR agreed with the dehydration and air injection methods, showing that the majority of vessels were still water filled above 'x of -1.5 MPa. The results of NMR and native embolism measurements indicate that vulnerability curves generated by dehydration and air-injection are more suitable for species with long vessels than the centrifuge technique. Our findings show V. vinifera stems are far-less vulnerable to water stress-induced cavitation than previously reported.


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