Studies on water soaked symptom of melon fruits.

1996 Fiscal Year Final Research Report Summary

• Project/Area Number: 07556075
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 試験
• Research Field: 園芸・造園学
• Research Institution: Yamagata University
• Principal Investigator: NISHIZAWA Takashi Faculty of Agriculture, Yamagata University, Associate Professor, 農学部, 助教授 (10208176)
• Co-Investigator(Kenkyū-buntansha): MOTOMURA Yoshie Faculty of Agriculture, Hirosaki University, Professor, 農学部, 教授 (50005609) ; MURAYAMA Hideki Faculty of Agriculture, Yamagata University, Associate Professor, 農学部, 助教授 (40230015) ; TAIRA Satoshi Faculty of Agriculture, Yamagata University, Associate Professor, 農学部, 助教授 (20167480)
• Project Period (FY): 1995 – 1996
• Keywords: acetaldehyde / water soaked symptom / ethanol / ethylene / carbohydrate / physiological disorder / melon / source-sink

Research Abstract

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.