Effects of Kinetin and Other Plant Growth Regulators on Starch Degradation

摘要: IT has been known since the work of Hayashi1 that gibberellins stimulate activity amylase in germinating barley and wheat grains. This extended by Paleg2–4, who reported an increase both α- β-amylases endosperm following treatment with gibberellic acid (GA3). So far as we are aware this communication is first to suggest kinetin may also play a part starch degradation. effect was suspected when young excised coleoptiles treated solutions kinetin5 were stained iodine. Starch found be present control whereas those two growth regulators no detectable. Estimations reducing sugars extracts these coleoptiles, after treatment, demonstrated response promoted accompanied breakdown (Table 1). When grown D-glucose solution alone remained yet maximal great kinetin. These results thus indicated responses induced GA3 could explained, at least part, simply terms liberation D-glucose. Indolyl-3-acetic produced measurable on or