Closed Chamber System for Easily Measuring the Respiration Rate of Intact Fruits

  • ONO Shintaro
    Graduate School of Bioresource and Bioenvironment Sciences, Kyushu University
  • YASUTAKE Daisuke
    Faculty of Agriculture, Kyushu University IoP Collaborative Creation Center, Kochi University
  • YOKOYAMA Gaku
    Graduate School of Bioresource and Bioenvironment Sciences, Kyushu University
  • TERUYA Yoshiya
    Graduate School of Bioresource and Bioenvironment Sciences, Kyushu University
  • HIDAKA Kota
    Kyushu Okinawa Agricultural Research Center, National Agriculture and Food Research Organization
  • OKAYASU Takashi
    Faculty of Agriculture, Kyushu University
  • NOMURA Koichi
    IoP Collaborative Creation Center, Kochi University
  • KITANO Masaharu
    IoP Collaborative Creation Center, Kochi University

説明

<p> We designed and constructed a light-shielding, closed fruit chamber system that can easily measure the respiration rate of intact fruits. Intact strawberries (Fragaria×ananassa Duch. cv. Fukuoka S6) were placed in the newly-developed system, and the change in CO2 concentration was measured. It was observed that this method was a valid means of determining the change in the CO2 concentration. Also, the respiration rate of the intact fruits could be evaluated appropriately by fitting a theoretical equation to the change in CO2 density for 180 s after closing the chamber measured by newly-developed system and obtaining the initial slope. This method was applied to intact strawberries at different ripening stages, and the effect of on the respiration rate was investigated. As the ripening stage progressed and the volume of fruits increased, the respiration rate per fruit at each ripening stage also significantly increased. However, there was no significant difference in the respiration rate per unit fruit volume at each ripening stage. These results suggest that newly-developed system is effective in measuring the respiration rate per fruit. This system would contribute to the comprehension of intact fruit respiration and photosynthate translocation to fruits.</p>

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