บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effects of dichlorprop and GA3 on ripening of 'Tsugaru' apple fruits.

Lee ChongSuk; Kang SeongMo; Hong SeJin; Lim ByungSeon; Lee YoungCheul;

Journal of the Korean Society for Horticultural Science Year: 2000 Vol: 41 Issue: 2 Pages: 182-186 Ref: 15 ref.

2000

บทคัดย่อ

Effects of dichlorprop and GA3 on ripening of 'Tsugaru' apple fruits.

The study was conducted to determine the effects of 2,4-DP (dichlorprop) and GA3 (gibberellic acid) on ripening of Tsugaru apples, with special emphasis on the changes in quality attributes. Increase in CO2 and ethylene evolution as well as skin redness indicated that the fruits treated with 2,4-DP alone and in combination with calcium acetate ripened 20 and 10 days earlier, respectively, than those treated with GA3 and control fruits. Fruit size was increased by GA3, and decreased by 2,4-DP mixed with calcium. Treatment with 2,4-DP was characterized by the enhanced loss of fruit firmness. Starch content decrease and soluble solids content increase were fastest in fruits treated with 2,4-DP alone. Fructose concentration was about 55% of total soluble sugars at harvest. Chemical sprays did not affect concentrations and proportions of fructose, glucose, sucrose and sorbitol in fruits. However, GA3 tended to reduce the concentrations of sucrose and glucose. Malic acid was over 60% of total organic

acids in fruits. Titratable acidity and malic acid concentration declined much faster in the 2,4-DP treatment. A higher concentration of malic acid was found in fruits treated with GA3.