Vol. 73 No: 3

Title:
Ethylene-Induced Rise of Abscisic Acid Levels and ACC Oxidase Activity in Immature Melons

Authors:
P. GUILLÉN, A. DOMÈNECH, C. LARRIGAUDIÈRE and M. VENDRELL

pp: 313-316

Abstract:
Immature cantaloupe charentais melons (Cucumis melo L. cv. Alpha) were harvested ten days before their optimum picking date, treated for 2 d with 100 ppm ethylene and kept at 21°C 85% r.h. for 10 d for further ripening. The treated immature fruits were compared with untreated immature or mature melons. CO₂, ethylene, ACC oxidase activity and abscisic acid levels were measured. Ethylene treatment induced ACC oxidase activity in immature fruits, whereas ACC and MACC levels remained low, which may indicate a lack of ACC synthase activity. Ethylene treatment also induced an increase in ABA levels in both skin and pulp. Relationships between ethylene and ABA content is discussed.

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