|
KMID : 0613819970070020142
|
|
Journal of Life Science
1997 Volume.7 No. 2 p.142 ~ p.148
|
|
|
Seasonal Changes of Chemical Compositions in Leaves, Shoot and Berries of ‘Delaware’Seedless Grapes induced by Gibberellic Acid
|
|
|
|
|
Abstract
|
|
|
|
This study was carried out to clarify seasonal changes of chemical compositions and their interrelation in leaves, shoots and berries treated with gibberellin(GA$_{3}$)for seedless grapes in ‘Delaware’grapevines. the clusters were dipped twice with 100ppm GA$_{3}$: 10 days befor and after the full bloom. The reaults obtained as follows; 1. Cumulative growth curve of berry fresh weight showed a double sigmoid curve and the characteristics of three distinctive growth stages(Ⅰ, Ⅱ, Ⅲ)were weekened with GA$_{3}$ treatment. 2. while the contents of ash, total carbon, total nitrogen and total carbohydratd had little reation with edvelopment and ripeness of berries, those of total sugar and starch jad close relation, viz., they decreased with enlargement and maturity fo berries, but increased rapidly after harvest in leaves and shoots. Especially, total sugars in leaves and shoots decreased coincidently with starch-increasing in shoots at November. 3. The contents of total soluble solid and reducing sugar in berries increased rapidly at growth stage Ⅲ, but those of total titratable acidity and organic acid decreased coincidently with sugar-increasing. 4. The berry-hardness increased until growth stage Ⅰ, and then stagnated until gtowth stage Ⅱ, and then increased rapidly at growth stage Ⅲ. pH of berry-juice decreased until growth stageⅡ, afterwards increased at growth stage Ⅲ. 5. By correlation and path coefficient analysis between qualitative characters and the ratio of total soluble solid to titratable acidity($^{0}$Brix/Acidity), total correlation coefficients were all highly significant. Of these characters, pH and viscosity of berry-juice were positive, but brightness and hardness of berry, negative. The direct effect of pH on $^{0}$Brix/Acidity ratio, p4y=0.9090, was large positively and those of berry-hardness and juice-viscosity, ply=0,5938, median and, p2y=0,3550, small, respectively. Direct effect of brightness was negatively small.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|