Effect of storage condition to export on the quality and stability of Camellia japonica and Ilex crenata
2019
Noda, R. (Fukuoka Agricultural and forestry Research Center, Chikushino, Fukuoka (Japan)) | Tsukazaki, M. | Ibi, A.
Fukuoka Prefecture is the second largest garden seedling producer in the country. Its major products include Camellia japonica L. and Ilex crenata Thunb. We investigated the optimal conditions for exporting C. japonica and I. crenata to the European Union. To simulate the conditions inside export containers, C. japonica and I. crenata were stored at 5 ℃ under dark conditions. Respiration speed and ethylene production indicated a lack of stress, even when the seedlings were exposed to vibration or their leaves were removed; ethylene was not generated. Exposure to ethylene at 1-10 ppm for 1 week slightly affected C. japonica and I. crenata, but 6 weeks of ethylene exposure caused leaf abscission and browning. Furthermore, resistance to freezing was not acquired by September, which clearly increased the likelihood that whole seedlings might die from freezing disturbance in severely cold export destinations. To help maintain quality for up to 6 weeks, long-term exposure of C. japonica and I. crenata to ethylene-producing products should be avoided; and pots of seedlings shipped during September, November, and January should be covered in polyethylene bags.
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