1983 Volume 52 Issue 3 Pages 238-242
The purpose of this study was to clarify the effects of ethylene on peel puffing of satsuma mandarin (Citrus unshiu Marc.) cv. Sugiyama fruits.
1. Ethylene evolution from fruit was greatly increased by spraying fruit on the tree with 100ppm ethephon on Oct. 28. The occurrence of peel puffing was enhanced and specific gravity was significantly lower in the ethephon-treated fruit than non treated fruit.
2. Fruit on the tree were treated with 10-4M of aminoethoxy analog of rhizobitoxine (AAR) by 10sec. dipping on Nov. 26 and Dec. 1 and 4. By this AAR treatment, ethylene production of fruit was suppressed, the occurrence of peel puffing was depressed and the decrease of specific gravity was delayed.
3. When fruits harvested on Dec. 1 were stored at 20°C in 12l containers with ethylene absorbent (KMnO4) until Dec. 22, ethylene concentration in the containers was lowered and the occurrence of peel puffing was depressed as compared with when stored with ethylene absorbent.
4. AAR and KMnO4, which depressed the occurrence of peel puffing, decreased the ratio of peel weight to fruit weight, and the content of water soluble pectin while increased the content of 0.4% sodium hexametaphosphate and 0.05N hydrochloric acid soluble pectins as compared with their respective controls. The reverse was true for ethephon, which enhanced peel puffing.