The results of the evaluation of the quantitative characteristics of respiration in the leaves of Galanthus nivalis exposed to low temperatures and changing humidity are presented. Leaves at the stages of the growing season and during flowering were used. The intensity of oxygen uptake was determined by the polarographic method using the Clark electrode. It was established that the intensity of the total respiration (Vt) directly correlates with changes in humidity (correlation coefficient of 0.80) that might indicate a need of G. nivalis plants in the high level of relative humidity. The lower air temperatures caused the increase in the fraction of cyanide-resistant respiration in the total respiration. The revealed patterns are likely associated with the plant need in involving additional energy costs for activating their metabolic processes during adaptation to low temperatures.

Keywords: air humidity, Galanthus nivalis, hypothermia, respiration, potassium cyanide

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