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The fruits of Red delicious apple were harvested 143 days after ‘full bloom” In 1993-1994. The fruits were transported to the laboratory and posthrvest treatment of ca was applied.
The fruit were dipped in CaCI2 at 4 and 8 percent (W/V) for 10 minutes and then stored at OC for 6 months. Ethylene production and quantitative factors were measured during storage period.
The results of this experiment showed that type of root-stock had significant effect on ethylene production and fruit on M9 produced more ethylene than M29.
The CaC12 densities not only decreased ethylene production, but the time that ethylene reach a maximum was delayed. Fruits permeability of CaCI2 on M9 are more than M26 and also the highest amount of CaCI2 was diffused to flesh tissue during 45 days after storage. There was a good correlate between fruit firmness and in creasing of CaCI2 density. After 6 months storage with 2 CaCI2 densities (4,8% W/V) dray matter and maleness of M26 wase more than M9.
Total soluble slides (T.S.S) fruit of M26 was more than M9. but terrible acidity (T.A) and PH were not affected by CaCl2 density and genotypic root-stock.