Various Cultivars of Citrus Fruits: Effects of Construction on Gas Diffusion Resistance and Internal Gas Concentration of Oxygen and Carbon Dioxide

Various cultivars of citrus fruits have unique constructions, such as thick outer skin. These constructions generate gas diffusion resistance between the atmosphere and the fruit, which can limit the gas exchange of O2 and CO2.This has not been sufficiently investigated. This study on seven cultivar...

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Bibliographic Details
Published in:AgriEngineering 2024-12, Vol.6 (4), p.4267-4279
Main Authors: Morimatsu, Kazuya, Konagaya, Keiji
Format: Article
Language:English
Subjects:
Ambient temperature
Atmosphere
Carbon dioxide
Carbon dioxide concentration
Chromatography
citrus fruit
Citrus fruits
Control systems
Cultivars
Diffusion
Efflux
Ethane
Fruits
gas diffusion resistance
Gas exchange
Gaseous diffusion
internal gas concentration
Respiration
Skin resistance
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Summary:Various cultivars of citrus fruits have unique constructions, such as thick outer skin. These constructions generate gas diffusion resistance between the atmosphere and the fruit, which can limit the gas exchange of O2 and CO2.This has not been sufficiently investigated. This study on seven cultivars of citrus fruit firstly aimed to investigate gas diffusion resistance utilizing the ethane efflux method; secondly, this study aimed to investigate the internal gas concentration of O2 and CO2. As a result, a cultivar of citrus fruit with slimmer outer skin thickness had lower resistance. For the internal gas, a high CO2 concentration in comparison with the atmosphere was observed even in the fruits with the minimum resistance, and no considerable difference was observed among all cultivars, regardless of the gas diffusion resistance value. However, when the fruits were stored at 25 °C for 2 weeks, CO2 gas concentration tended to increase and O2 gas concentration tended to decrease, with an increase in the resistance value. Therefore, when the respiration of citrus fruits is activated at ambient temperature, the self-control system of internal gas concentration can be driven to suppress the respiration which was induced by gas diffusion resistance generated from their construction.
ISSN:2624-7402
2624-7402
DOI:10.3390/agriengineering6040240