Studies on water soaked symptom of melon fruits.

甜瓜(Cucumis Melo L.)结果表明：1.甜瓜果实快速生长期间的临时遮荫会导致果实出现浸水症状。2.症状的严重程度因品种而异，‘安得苏’出现严重，而‘Ruster’没有。3.遮荫显著抑制果实中蔗糖的积累，而己糖的积累不受抑制。4.遮荫条件下，乙醛和乙醇浓度增加。5.遮荫条件下乙烯合成也加快，果实硬度降低。6.落叶和超载均未诱导果实出现浸水症状。7.叶片喷施ABA促进果实软化和乙烯的产生。

The water soaked symptom of melon (Cucumis melo L.) fruits was studied.1.Temporary shading during the rapid growth of melon fruit induced the occurrence of water soaked symptom.2.The grade of symptom was different from varieties, i.e.it appeared heavily in 'Andesu' but not in 'Ruster'.3.Sucrose accumulation in the fruit was greatly inhibited by shading, while hexose accumulation was not inhibited.4.Acetaldehyde and ethanol concentrations increased under shading condition.5.Ethylene production was also accelerated under shading condition with concomitant decrease in fruit hardiness.6.Both defoliation and over loading did not induce the water soaked symptom.7.ABA sprayd on leaves accelerated the softening of fruit and ethylene production.