Effect of Abscisic Acid on Sorbitol Uptake in Growing Apple Fruits

摘要: Levels of abscisic acid (ABA) in the fruit flesh developing apples (cv. Golden Delicious) were measured by electron capture gas chromatography. ABA content tissue, calculated on a fresh weight basis, decreased at constant rate from 200 ng g_1 young to 10 fig g-1 older and then increased when ripening process commenced. On whole level during initial phase growth, remained linear growth again fruits started ripen. During development correlated with sorbitol uptake, after discs tissue incubated [14C]sorbitol. Sorbitol uptake was high declined development. present incubation medium stimulated into concentrations higher than 1CL8 M, whereas indolyl-3-acetic had no effect uptake. When comparing different zones fruit, it found that outer layers inner zones.