α-Amylase in germinating, decorticated barley-II. Effects of physically damaging the grain

摘要: Abstract α-Amylase was measured in barley grains, incubated with or without gibberellic acid, after the grains had been burnt punctured different ways. Conditions were found such that α-amylase production, and by inference production of endogenous gibberellins, inhibited independently effect treatments on coleoptile growth. Damage to a small area aleurone results an unexpectedly large reduction synthesis, suggesting some extent functions as one unit rather than collection independent cells. α-Amylase, induced exogenous GA 3 where embryo burnt, destroyed more slowly growth normal, favouring hypothesis withdrawal substances growing from endosperm favours breakdown α-amylase. The pH homogenates also favoured this view. method which sterilized before burning embryos influenced rate formation relative whole each presence .