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
                                            KNIPFER, THORSTEN - University Of Californiaitem
                                            Eustis, Ashleyitem
                                            BRODERSEN, CRAIG - Yale Universityitem
                                            WALKER, ANDREW - University Of Californiaitem
                                            McElrone, Andrew
  Submitted to: Plant Cell and Environment
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 1/15/2015
                                    Publication  Date: 1/31/2015
                                    Publication URL: http://onlinelibrary.wiley.com/doi/10.1111/pce.12497/fullCitation: Knipfer, T., Eustis, A.J., Brodersen, C., Walker, A., Mcelrone, A.J. 2015. Grapevine species from varied native habitats exhibit differences in embolism formation/repair associated with leaf gas exchange and root pressure. Plant Cell and Environment. 38:1503-1513.Interpretive Summary: Drought stress can cause water transport tissue (xylem) in plants to become blocked with air bubbles (embolism). Grapevines are known to repair embolism once they form in the water conducting tubes, but it is not known whether this capability differs among grapevine species.  We used micro-computed tomography (a type of CT scan) to look inside grapevine xylem subjected to drought and recovery after rewatering. We found that the species differed in the amount of embolism formed in their xylem under drought and differed in their ability to repair embolism once it formed. This information can be used to select for improved drought resistance in grapevine rootstocks.
                                Technical Abstract: Drought induces xylem embolism formation, but grapevines can refill blocked conduits to restore transport capacity. It is unknown whether vulnerability to embolism formation and ability to repair differ among grapevine species. We analyzed in vivo embolism formation and repair using x-ray microtomography in three wild grapevine species from varied native habitats (Vitis riparia, V. arizonica, V. champinii), and related responses to measurements of leaf gas exchange and root pressure. Vulnerability to embolism formation was greatest in V. riparia, intermediate in V. arizonica, and lowest in V. champinii. After re-watering, embolism repair was rapid and pronounced in V. riparia and V. arizonica, but limited or negligible in V. champinii even after numerous days. Similarly, root pressure measured after re-watering was positively correlated with drought stress severity for V. riparia and V. arizonica (species exhibiting embolism repair) but not for V. champinii. Drought-induced reductions in transpiration were greatest for V. riparia and least in V. champinii. Recovery of transpiration after re-watering was delayed for all species, but was greatest for V. champinii and most rapid in V. arizonica. These species exhibit varied responses to drought stress that involve maintenance/recovery of xylem transport capacity coordinated with root pressure and gas exchange responses.


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