interactions of avg, mcp and heat treatment on apple fruit ripening PDF
Preview interactions of avg, mcp and heat treatment on apple fruit ripening
UUnniivveerrssiittyy ooff KKeennttuucckkyy UUKKnnoowwlleeddggee University of Kentucky Doctoral Dissertations Graduate School 2006 IINNTTEERRAACCTTIIOONNSS OOFF AAVVGG,, MMCCPP AANNDD HHEEAATT TTRREEAATTMMEENNTT OONN AAPPPPLLEE FFRRUUIITT RRIIPPEENNIINNGG AANNDD QQUUAALLIITTYY AAFFTTEERR HHAARRVVEESSTT AANNDD CCOOLLDD SSTTOORRAAGGEE Valeria Sigal-Escalada University of Kentucky, [email protected] RRiigghhtt cclliicckk ttoo ooppeenn aa ffeeeeddbbaacckk ffoorrmm iinn aa nneeww ttaabb ttoo lleett uuss kknnooww hhooww tthhiiss ddooccuummeenntt bbeenneefifittss yyoouu.. RReeccoommmmeennddeedd CCiittaattiioonn Sigal-Escalada, Valeria, "INTERACTIONS OF AVG, MCP AND HEAT TREATMENT ON APPLE FRUIT RIPENING AND QUALITY AFTER HARVEST AND COLD STORAGE" (2006). University of Kentucky Doctoral Dissertations. 448. https://uknowledge.uky.edu/gradschool_diss/448 This Dissertation is brought to you for free and open access by the Graduate School at UKnowledge. It has been accepted for inclusion in University of Kentucky Doctoral Dissertations by an authorized administrator of UKnowledge. For more information, please contact [email protected]. ABSTRACT OF DISSERTATION Valeria Sigal-Escalada The Graduate School University of Kentucky 2006 INTERACTIONS OF AVG, MCP AND HEAT TREATMENT ON APPLE FRUIT RIPENING AND QUALITY AFTER HARVEST AND COLD STORAGE ABSTRACT OF DISSERTATION A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the College of Agriculture at the University of Kentucky By Valeria Sigal-Escalada Lexington, Kentucky Director: Dr. Douglas D. Archbold, Professor of Horticulture Lexington, Kentucky 2006 Copyright © Valeria Sigal-Escalada 2006 ABSTRACT OF DISSERTATION INTERACTIONS OF AVG, MCP AND HEAT TREATMENT ON APPLE FRUIT RIPENING AND QUALITY AFTER HARVEST AND COLD STORAGE The effects of AVG, an inhibitor of ethylene synthesis, in combination with MCP or heat treatment (HT) on quality traits of several apple cultivars after harvest (AH) or cold storage (ACS), and the involvement of ethylene in the regulation of SDH activity during the last weeks of fruit development were studied. AVG was applied to ‘Royal Gala’, ‘Lodi’, ‘Senshu’, ‘Redchief Delicious’ and ‘Red Fuji’ trees 4 weeks before normal harvest (H1). Control and AVG-treated (AVG) fruit were harvested at H1 and treated with MCP or air-heated. Fruit were ripened at room temperature (RT) AH or ACS. Some AVG fruit were harvested at H1 and 1 to 2 weeks after H1 (H2), or at H2 only. Ethylene production (EP), respiration rate (RR), firmness, starch index (SI), titratable acidity (TA), volatile production (VP) and AAT activity, among others, were measured AH and ACS. Peel and cortex of ‘Gala’ were alcohol-fed and ester production quantified. EP and SDH presence and activity were measured at various harvest dates on control and AVG ‘Lodi’, ‘Red Delicious’ and ‘Fuji’ apples. AVG plus MCP was more effective in reducing HEP, RR, firmness and TA loss than either treatment alone; it did not provide further control on SI and did not repress ‘Gala’ red skin color development more than AVG alone, though it consistently repressed VP. AVG plus HT was generally more effective than single treatments in reducing HEP, RR and firmness loss during storage. It was not different than the single treatments on TA, SI, and VP. The effect of AVG plus HT on fruit quality ACS was cultivar-dependent. AVG plus HT was not enough to maintain the quality of the early- harvest cultivars, and it did not improve fruit quality of late-harvest cultivars. The effects of AVG plus MCP but not of AVG plus HT were evident at H2. Precursor availability was the major factor limiting VP, suggested by the low VP when RR was low, the increase in ester production in alcohol-fed samples, and the lack of correlation between AAT and ester production. SDH activity or expression was not affected by a reduction in ethylene production. KEYWORDS: Malus domestica Borkh, alcohol-acyl tranferase, sorbitol dehydogenase, aminoethoxyvinylglycine, 1-methylcyclopropene Valeria Sigal-Escalada 07/07/2006 INTERACTIONS OF AVG, MCP AND HEAT TREATMENT ON APPLE FRUIT RIPENING AND QUALITY AFTER HARVEST AND COLD STORAGE BY VALERIA SIGAL-ESCALADA Douglas D. Archbold Director of Dissertation Arthur G. Hunt Director of Graduate Studies 07/07/2006 Date RULES FOR THE USE OF DISSERTATIONS Unpublished dissertations submitted for the Doctor’s degree and deposited in the University of Kentucky Library are as a rule open for inspection, but are to be used only with due regard to the rights of the authors. Bibliographical references may be noted, but quotations or summaries of parts may be published only with the permission of the author, and with the usual scholarly acknowledgements. Extensive copying or publication of the dissertation in whole or in part also requires the consent of the Dean of the Graduate School of the University of Kentucky. DISSERTATION Valeria Sigal-Escalada The Graduate School University of Kentucky 2006 INTERACTIONS OF AVG, MCP AND HEAT TREATMENT ON APPLE FRUIT RIPENING AND QUALITY AFTER HARVEST AND COLD STORAGE DISSERTATION A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the College of Agriculture at the University of Kentucky By Valeria Sigal-Escalada Lexington, Kentucky Director: Dr. Douglas D. Archbold, Professor of Horticulture Lexington, Kentucky 2006 Copyright © Valeria Sigal-Escalada 2006 DEDICATION This is dedicated to my grandmother Maria Julia Vitale de Escalada, who will always live in my heart, and to my friend Mariel Betina Orlando who was a constant support from Argentina during all these years. ACKNOWLEDGMENTS I would like to extend my sincerest gratitude to my advisor Dr. Douglas A. Archbold for his kindness, useful guidance and advice throughout my study, and for funding the project. I would like to thank Drs. Bruce Downie, Robert Houtz, Thomas Kemp and John Strang for their valuable suggestions and comments as members of my committee, and Dr. Kenneth Seebold who took time to be my outside examiner. The Department of Horticulture funded my last two years of tuition, and for that I am very grateful. I would like to thank Ms. Marta Nosarzewski for helping me with the biochemical analyses and Western Blots and Mr. Randall Collins who performed all the volatile analyses. I am also grateful with the staff of the Horticulture Department who provided assistance throughout these years, and with the other members of the lab, Ms. Federica Galli, Dr. Kyung Myung, Ms. Roberta Magnani, Mr. Matt Fulkerson and Ms. Pavani Vuppalapati for their company and nice moments in the lab. Finally, I would like to acknowledge my friends in Lexington, who became my family during these years, sharing the nice moments and supporting me through the difficult ones. I would also like to thank my family and friends in Argentina for their support. ii i
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