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
                                            LAWRENCE, DANIEL - University Of Californiaitem
                                            Galarneau, Erinitem
                                            TRAVADON, RENAUD - University Of Californiaitem
                                            Baumgartner, Kendra
  Submitted to: American Phytopathological Society Abstracts
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 5/15/2015
                                    Publication  Date: 11/1/2015
                                    Citation: Lawrence, D., Galarneau, E.R., Travadon, R., Baumgartner, K. 2015. Interactive effects of water stress and Neofusicoccum parvum on Botryosphaeria dieback of grapevines. American Phytopathological Society Abstracts. 576-P.Interpretive Summary:
                                Technical Abstract: The relationship between vascular pathogens and water stress is an important topic in California agriculture, given successive years of drought and restrictions on water use. We examined the interactive effects of water stress and Neofusicoccum parvum on severity of Botryosphaeria dieback of grapevines. Cabernet Sauvignon plants were inoculated with N. parvum after wounding; control plants were wounded and inoculated with PDB. After 2 weeks, water stress was imposed on half of the inoculated and control plants. Water usage was estimated weekly for non-stressed plants to provide 20% of this volume for stressed plants. Leaf water potential was monitored weekly with a pressure chamber to maintain potentials of > -8 bars for non-stressed and < -13 bars for stressed plants. Leaves were collected for RNA extraction 2 weeks before imposing water stress (2 weeks post-inoculation, 2 WPI), and at 8 and 12 WPI. At 12 WPI, lengths of stem lesions were measured and used to determine the effect of the pathogen and/or water stress on the vascular tissue. Inoculated plants under water stress had the greatest lesion lengths, relative to other treatments. To examine the specificity of the host response to the pathogen, water-stressed plants were used to screen 13 grapevine genes that have been shown to be differentially regulated in leaves in response to N. parvum. Some markers were specific to infection, whereas others cross-reacted with water stress in non-inoculated plants.


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