摘要: Experiments with youngHordeum sativum andHelianthus annus plants showed that in the excretion of mannitol guttation liquid observed byGroenewegen andMills (1960) after uptake by root system plants, osmotic concentration nutrient medium and temperature are significant. The beginning during is accelerated considerably increase rising temperature. also important for duration transfer into a without mannitol. In presence water growth inhibited tissues organs above ground dehydrated. inhibitory effect on immediate.