To elucidate the inhibitory effect of ethephon on the occurrence of water-soaked disorder in Japanese pear ‘Akizuki’ (Pyrus pyrifolia Nakai) fruit, we sprayed fruits with 100 mg·L⁻¹ ethephon solution approximately 120 DAFB in the 2012, 2014, 2015, 2016, and 2017 seasons. Ethephon treatment reduced the incidence and degree of water-soaked disorder at commercial harvest time. There was no significant difference in fruit size or soluble solids content between the ethephon-treated fruits and the control fruits, except for fruit size in the 2012 season. During the nine-day storage period after harvest, water-soaked disorder did not develop in either the ethephon-treated fruits or the control fruits. In addition, flesh firmness and soluble solids content did not differ between the ethephon-treated fruits and the control fruits during the storage period. Ethylene production increased sharply in the ethephon-treated fruits a few days after the ethephon treatment, in contrast to the control fruits. Sucrose content in the ethephon-treated fruits was higher than that in the control fruits on day 10 after treatment. Sorbitol content in the ethephon-treated fruits was lower than that in the control fruits on days 10 and 20 after treatment. Water-soluble, Na₂CO₃-soluble, and total pectin contents were not affected by the ethephon treatment. Hemicellulose, cellulose, and starch contents in the ethephon-treated fruits decreased earlier than those in the control fruits. Sucrose content was lower, but sorbitol and glucose contents were higher, in water-soaked tissue than in sound tissue. These results suggest that ethephon treatment rapidly induces changes in the contents of fruit’s internal components and accelerates fruit maturation, thereby alleviating factors that cause water-soaked disorder in ‘Akizuki’.

为了阐明乙烯利对秋月梨果实水浸病发生的抑制作用，我们于2012年、2014年、2015年分别用100 mg·L ^-1乙烯利溶液约120 DAFB喷洒果实。 、2016 和 2017 赛季。乙烯利处理降低了商业收获时水浸病的发生率和程度。除2012年季节的果实大小外，乙烯利处理的果实与对照果实之间的果实大小或可溶性固形物含量没有显着差异。在收获后九天的储存期内，乙烯利处理的果实或对照果实都没有出现水浸病。此外，在贮藏期间，乙烯利处理的果实与对照果实的果肉硬度和可溶性固形物含量没有差异。与对照水果相比，乙烯利处理后几天的乙烯产量急剧增加。处理后第10天，乙烯利处理的果实中的蔗糖含量高于对照果实。处理后第10天和第20天，乙烯利处理的果实中山梨醇含量低于对照果实。水溶性、Na ₂ CO ₃溶性和总果胶含量不受乙烯利处理的影响。乙烯利处理的果实中的半纤维素、纤维素和淀粉含量比对照果实中下降得更早。水浸组织中的蔗糖含量较低，但山梨醇和葡萄糖含量较高。这些结果表明，乙烯利处理可迅速引起果实内部成分含量的变化，加速果实成熟，从而减轻导致“秋月”水浸病的因素。