Fruit Produce Facts English
Recommendations for Maintaining Postharvest Quality
Adel A. Kader
Department of Plant Sciences, University of California, Davis
Maturity & Quality
Fully mature fruits are dark-green and their segments are more rounded and smoother than less mature fruits. Latex stains may be present on the skin of mature fruits. Yellowing of the skin indicates over-maturity (partial ripeness). In some cases, fruits are picked when fully ripe and sweet for consumption as a dessert.
Maturity & Quality Photos
Temperature & Controlled Atmosphere
13 ± 1°C (56 ± 2°F); storage potential = 2-4 weeks, depending on cultivar and maturity stage.
Optimum Relative Humidity
Rates of Respiration
The range of respiration rates at 20°C (68°F) is 38 (preclimacteric) to 178 (climacteric peak) ml CO2/kg·hr.
To calculate heat production multiply ml CO2/kg·hr by 440 to get Btu/ton/day or by 122 to get kcal/metric ton/day.
Rates of Ethylene Production
The range of ethylene production at 20°C (68°F) is 0.1 (preclimacteric) to 1.6 (climacteric peak) µl/kg·hr.
Responses to Ethylene
Exposure to 50ppm or higher concentrations of C2H4 for 24 hours at 20°C (68°F) accelerates ripening of breadfruits (as indicated by color changes from green to yellow and softening) and shortens their postharvest-life.
Responses to Controlled Atmospheres (CA)
A CA of 5% O2 + 5% CO2 or use of modified atmosphere packaging (5-8% O2 + 8-10% CO2) may be useful in delaying ripening (softening) and extending postharvest-life of mature-green breadfruits kept within the optimum ranges of temperature and relative humidity.
Physiological and Physical Disorders
Chilling Injury. Fruits kept at temperatures below 12°C (54°F) before transfer Disorders to higher temperatures exhibits the following symptoms of chilling injury: brown discoloration of the skin, pulp browning and off-flavor development, and increased susceptibility to decay.
Pathological disorders usually follow mechanical damage and/or chilling injury of breadfruits. Decay may be caused by Phytophthora palmivora or Rhizopus artocarpi or Botryobasidium salmonicola.
Use of Materials
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Except for these specified uses, no part of the textual materials available on the UC Postharvest Technology Center Web site may be copied, downloaded, stored in a retrieval system, further transmitted or otherwise reproduced, stored, disseminated, transferred or used, in any form or by any means, except as permitted herein or with the University of California's prior written agreement. Request permission from UC Postharvest Technology Center. Distribution for commercial purposes is prohibited.
The information in this fact sheet represents our best understanding of the current state of knowledge at the time of the latest update, and does not represent an exhaustive review of all research results. Links to any of these UC Postharvest Technology Center pages are permitted, but no endorsement of the linking site or products mentioned in the linking page is intended or implied by such a link.
How to Cite
Author(s) names. Initial publication or update date (located at the top). Title. Link to the specific Produce Fact Sheet webpage (Accessed date)
Example: Cantwell, M. and T. Suslow. 2002. Lettuce, Crisphead: Recommendations for Maintaining Postharvest Quality.
http://ucanr.edu/sites/Postharvest_Technology_Center_/Commodity_Resources/Fact_Sheets/Datastores/Vegetables_English/?uid=19&ds=799 (Accessed January 18, 2014).