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
 Commodity Protection and Quality Research: Parlier, CA
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Research Units
                        San Joaquin Valley Agricultural Sciences Center
                                    Crop Diseases, Pests and Genetics Research
                                    Water Management Research
                                    National Arid Land Plant Genetic RepositorySearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Pacific West Area Parlier, California San Joaquin Valley Agricultural Sciences Center Commodity Protection and Quality 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
                                            Obenland, David

                                                         - *Dave*item
                                            Neipp, Paul
  Submitted to: HortScience
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 4/16/2005
                                    Publication  Date: 10/1/2005
                                    Citation: Obenland, D.M., Neipp, P.W. 2005. Chlorophyll fluorescence imaging allows early detection and localization of lemon rind injury following hot water treatment. Hortscience 40(6):1821-1823.Interpretive Summary: Citrus often suffer rind injury as a result of non-chemical alternative treatments to methyl bromide fumigation but study of the basis of the injury is hampered by an inability to determine areas of the rind that are damaged early in the development of the injury.  Measurement of chlorophyll fluorescence immediately following hot water treatment of lemons was found to provide a rapid and effective means of determining where treatment-induced injury will occur following storage.  This method may be useful in determining the biochemical basis of rind injury and facilitate the development of alternative treatments to methyl bromide.
                                Technical Abstract: Green lemons (Citrus limon (L.) Burm.) were imaged for chlorophyll fluorescence (CF) 30 min after immersion of the fruit into 55 °C water for 5 min to determine if CF could be used to identify areas of hot water-induced rind injury prior to the appearance of visible symptoms.  Fluorescence was variable in intensity over the surface of the rind with defined areas of enhanced fluorescence being present that corresponded in shape and location with visible injury that later developed during 24 h of storage.  Images showing minimum fluorescence (F0) and maximal fluorescence (Fm) provided the best image contrast between injured and non-injured areas of the rind.  Total F0 present in the image was closely correlated (r = 0.87) with the area of rind injury present following storage.  Holding the fruit under conditions of low humidity for 24 h prior to hot water treatment prevented both the formation of areas of enhanced fluorescence and the corresponding rind injury.  Imaging of CF has potential as a means to identify areas of incipient rind injury in citrus in order to facilitate study of the causal mechanisms of postharvest rind disorders.


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