Monitoring mature tomato (red stage) quality during storage using ultraviolet-induced visible fluorescence image
Keiji Konagaya, Dimas Firmanda Al Riza, Sen Nie, Minori Yoneda, Takuya Hirata, Noriko Takahashi, Makoto Kuramoto, Yuichi Ogawa, Tetsuhito Suzuki and Naoshi Kondo
Postharvest Biology and Technology, Volume 160, February 2020, 111031
2020
บทคัดย่อ
The potential of UV-induced fluorescence imaging was investigated as a non-destructive tool to monitor postharvest quality degradation of tomatoes harvested at the red stage and stored at 25โ€ฏ°C. The fluorescence images (excitation at 365โ€ฏnm) were found to be a better indicator of tomato quality degradation than color images after color saturation. Tomatoes were stored at 25โ€ฏ°C for 9 d. The changes in color and fluorescence of tomato were evaluated by two types of images: Color and fluorescence images. A conventional colorimeter was also used for as a reference. Changes in the RGB ratio for these two types of images were opposite. In the color images, the G ratio decreased rapidly for the initial 3 or 5 d and then stabilized afterwards. On the other hand, in the fluorescence images, the G ratio increased continuously up to 9 d. Given that temperature conditions during transportation and storage of tomatoes is not always ideal, the results from this research provide the foundation for developing a postharvest monitoring system of mature tomato quality degradation.