Changes in polyamine synthesis during anther development and pollen germination in tobacco (Nicotiana tabacum) [arginine decarboxylase, elongation, ornithine decarboxylase]

antera anthere anthers cicloheximida cycloheximide enzyme inhibitors espermidina espermina germination inhibidores de enzimas inhibiteur d'enzyme liasas lyase lyases nicotiana tabacum polen pollen putrescina putrescine spermidine spermine