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Bruno Casamali, Jeffrey G. Williamson, Alisson P. Kovaleski, Steven A. Sargent, and Rebecca L. Darnell

, 1996 ). Blueberries are very perishable ( Vicente et al., 2007 ), thus, adequate and efficient harvesting methods ( Sargent et al., 2013 ), handling and packing ( Jackson et al., 1999 ), and postharvest storage strategies ( Schotsmans et al., 2007 ) are

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Xin Zhao, Edward E. Carey, Janice E. Young, Weiqun Wang, and Takeo Iwamoto

high tunnels, unheated polyethylene-covered greenhouse structures that are used in season-extending production for many horticultural crops ( Wells, 1996 ), may affect phenolic content of lettuce has not been reported. Postharvest storage also

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Brianna L. Ewing, Gregory M. Peck, Sihui Ma, Andrew P. Neilson, and Amanda C. Stewart

appears that both the apple genotype and the preharvest conditions that change each year (e.g., crop load, heat units, water or heat stress, nutrient status) are potentially interacting factors influencing the effects of postharvest storage on polyphenol

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İbrahim Kahramanoğlu and Serhat Usanmaz

described a number of successful biomaterials in postharvest storage studies, including chitosan ( Adiletta et al., 2018 ; Gutiérrez-Martínez et al., 2018 ; Sharif et al., 2015 ), EOs ( Kahramanoğlu 2019 ; Pavela and Benelli 2016 ; Prakash et al., 2015

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Douglas D. Archbold, Rumphan Koslanund, and Kirk W. Pomper

To facilitate the growth of a commercial pawpaw (Asimina triloba) industry, several problems with harvest and postharvest handling of fruit need to be resolved. Pawpaw fruit ripening is characterized by an increase in soluble solids content, fl esh softening, increased volatile production, and a loss of green color intensity. Within 3 days after harvest, ethylene and respiratory climacteric peaks are clearly evident. Softening of fruit is due to the action of at least four enzymes, with the softening proceeding from the surface to the interior tissue. Fruit on a single tree can ripen over a 2-week period, creating labor problems. When immature fruit is harvested it does not ripen, even if treated with ethephon at 1000 mg·L-1 (ppm), but the use of commercially available growth regulators both pre- and postharvest warrants further study. Fruit soften very rapidly at room temperature after harvest and have a 2-to 4-day shelf life. However, we have stored pawpaw fruit for 1 month at 4 °C (39.2 °F) with little change in fruit firmness and fruit apparently continue normal ripening upon removal to ambient temperature. The optimum temperature and duration for holding fruit will need to be determined. Further extension in pawpaw storage life may be feasible with controlled or modified atmosphere storage. Although there are a number of practical problems with pawpaw harvest and postharvest storage that need to be addressed, we hope to develop recommendations for harvest and handling of fruit in the near future.

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Huating Dou and Peter D. Petracek

`Fallglo' is an early season variety of tangerine that has become known among citrus packers for its susceptibility to postharvest peel disorders. Among these disorders is postharvest pitting, a disorder characterized by the collapse of the peel during the storage of waxed fruit at room temperature. In this study, the effects of wax application on selected postharvest storage characteristics were evaluated.

Fruit were either not waxed or waxed with carnauba-, polyethylene-, or shellac-based waxes obtained from four suppliers of commercial citrus coatings and were stored at 21°C. In general, waxing reduced weight loss and improved shine. Waxing with shellac-based waxes significantly decreased internal O2 levels (5% vs. 19% for non-waxed fruit) and increased internal CO2 (6% vs. 2% for non-waxed fruit) and ethanol levels. Waxing with shellac-based waxes also significantly reduced post-packing degreening and stimulated pitting. Waxing with more gas-permeable coatings (carnaubaand polyethylene-based waxes) resulted in less internal gas modification than that of the shellac-based treatments, and low incidences of pitting. Controlled atmosphere studies showed that low (4%) O2, rather than high (8%) CO2, inhibited post-packing degreening and stimulated pitting.

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Gene E. Lester

Plasma membrane (PM) from hypodermal-mesocarp tissues of muskmelon fruits (Cucumis melo L. var. reticulatus Naud.) were compared to the electrolyte leakage changes of the same tissue during maturation and storage at 4 or 24C. During fruit maturity and storage, leakage of the hypodermal-mesocarp tissue increased, which is coincident with increased total sterol: total phospholipid ratios and increased phospholipid fatty acid saturation index of the PM. ATPase activity, a marker for the PM, indicated that the PM increased in buoyant density from 1.13 to 1.14 during maturity and ATPase activity peaked with fruit maturation. ATPase activity decreased with 10 days postharvest storage and was less at 24C vs. 4C, which was coincident with increased hypodermal-mesocarp electrolyte leakage. Biochemical changes within the sterol and phospholipid matrix of the PM are suggested to contain the processes capable of altering fruit membrane permeability and subsequent muskmelon fruit storage life.

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Ambani R. Mudau, Puffy Soundy, Hintsa T. Araya, and Fhatuwani N. Mudau

, U.E. Knuthsen, P. Olsson, M.E. 2005 Flavonoids in baby spinach (Spinacia oleracea L.): Changes during plant growth and storage J. Agr. Food Chem. 53 9459 9464 Bergquist, S.A.M. Gertsson, U.E. Olsson, M.E. 2006 Influence growth stage and postharvest

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Derek W. Barchenger, John R. Clark, Renee T. Threlfall, Luke R. Howard, and Cindi R. Brownmiller

postharvest storage ( James et al., 1999 ; Morris, 1980 ; Perkins-Veazie et al., 2012 ). Both public and private muscadine breeding programs are addressing these limiting factors through the development and evaluation of muscadine genotypes (selections and

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Engin Ertan, Esra Erdal, Gülsüm Alkan, and Burak E. Algül

buried with their burs in a pit under trees in the orchard and are covered with plants such as fern. This is the most commonly used method, especially in the Aegean Region in the western part of Turkey. Using this method for postharvest storage, the