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 Citrus and Other Subtropical Products Research: Fort Pierce, FL
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ARS Home Southeast Area Fort Pierce, Florida U.S. Horticultural Research Laboratory Citrus and Other Subtropical Products Research Research Publications at this Location





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Title:   Author  item
                                            WANG, LIBIN - Nanjing Agricultural Universityitem
                                            Baldwin, Elizabeth

                                                         - *Liz*item
                                            Zhao, Weiitem
                                            Plotto, Anneitem
                                            SUN, XIUXIU - Wayne State Universityitem
                                            WANG, ZHE - Jilin Universityitem
                                            BRECHT, JEFFREY - University Of Floridaitem
                                            Bai, Jinhe
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 4/1/2014
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: Chilling exposure of tomatoes to 5°C for longer than 6-8 days can cause surface pitting, irregular (blotchy) color development and other symptoms of chilling injury (CI). The objectives for this study were to investigate whether a 4-day exposure of tomato fruit to chilling at the mature green stage of development would impact flavor quality after ripening, and if a pre-chilling heat treatment could alleviate the internal CI. Mature green ‘FL 47’ tomatoes were gassed with ethylene and then divided into the following four treatments: 1) pre-treated with 52°C hot water for 5 min and then exposed to 5°C for 4 days before being transferred to 20°C, or 2) placed directly at 20°C after heat treatment, without chilling, and 3) exposed to 5°C for 4 days without prior heat treatment then transferred to 20°C, or 4) non treated control. All samples were held at 20°C until ripened. Fruit were analyzed at the red-ripe stage for volatile components and submitted to a sensory panel for aroma evaluation. Results showed that chilling treatment generally suppressed production of aldehyde, alcohol, ketone, ester, sulfur, and terpene volatile compounds, including the following abundant and/or important volatiles:  2-methylbutanal, hexanal, benzaldehyde, 6-methyl-5-hepten-2-one, ß-ionone, hexanol, and 2-isobutylthiazole. Heat treatment alone did not affect most volatile levels after ripening. Heat treatment prior to chilling exposure alleviated the reduction of the volatile compounds caused by chilling exposure, which agreed with the sensory panel results in that panelists preferred “heating + chilling” treated fruit over fruit that were chilled only.


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