Studies on water soaked symptom of melon fruits.

对甜瓜果实水浸症状进行了研究。甜瓜果实快速生长期间的临时遮荫导致了水浸症状的发生。2 .不同品种的症状程度不同，即“安地苏”出现较重，“锈病”较少。遮荫对果实中蔗糖的积累有明显的抑制作用，而对己糖的积累没有抑制作用。遮荫条件下乙醛和乙醇浓度升高。遮荫条件下乙烯的产生也加快，果实硬度随之降低。落叶和超载均未引起水浸症状。叶面喷施ABA加速了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.