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標題: The Physical Damage and Chilling Injury Symptom of Waxapple
作者: 洪登村
D. S. Horng
T. S. Lin
P. L. Tsai
T. T. Fang
關鍵字: Physical Damage;損傷;Chilling Injury;Waxapple;寒害;蓮霧
Project: Horticulture NCHU, Volume 14, Page(s) 45-60.
興大園藝, Volume 14, Page(s) 45-60.
4.蓮霧果皮之組織係屬於單層皮層(uniseriate epidermis)構造,表皮外面覆以蠟質層,當果實遭受寒害時,蠟質層在構造上尚能保持完整並損。

1.Waxapple fruits are very susceptibel to physical damage, but the damage does not affect the respiration rate of the fruit, and the wound ethylene produced is very low.
2.Waxapple fruits were susceptible to chilling injury when fruits were subjected to temperature below about 12.6℃. The symptom of pitting was sevre when fruits were exposed to temperature at 10 ℃ for 2 days but only mild when they were exposed to 5℃ for the same period.
3.Many small shrunken pitting were first appeared on the surface of the chilling fruits. Also, color fading was initially concentrated on these pitting spots. Afterwards, pitting area expanded and color fading occurred on all fruit surface.
4.During the development of chilling injury, the respiration rate of waxapple fruit with high brix rose up more quickly and then declined more slowly than those fruits with low brix. However, there was no significant relation between severity of pitting and content of total soluble solids in the fruits.
5.The epidermis of waxapple fruit was of uniseriate structure and was covered with a thock and unblemished wax layer. The gross structure of the wax layer was not damaged and remained in rather good condition in chilling injured fruits.
6.When the fruits became injured after the chilling treatment, the parenchyma cells underneath the epidermis collapsed. The region of collapsed cells became shrunken and resulted in pitting spots. The cells near the epidermis deformed and collapsed seriously but those in the deeper part of the fruit distorted only slightly and showed no sign of collapse.
7. Once chilling injury occurred, many small pores with 20-25 μm in diameter were observed from the expansion of stomata. As a result, the wax layer near the pores splitted into many small segments which from concentric corcles with the pores as the center. The closer to the center, the more serious the crack was.
ISSN: 0255-5921
Appears in Collections:第14期

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