Е.Н. Икконен, Т.Г. Шибаева, Е.Г. Шерудило, М.И. Сысоева.
Фотосинтез и устьичная проводимость листьев Cucumis sativus L., испытавших длительные или периодические кратковременные низкотемпературные воздействия в разных фазах роста
// Труды КарНЦ РАН. No 5. Сер. Экспериментальная биология. 2014. C. 53-58
E.N. Ikkonen, T.G. Shibaeva, E.G. Sherudilo, M.I. Sysoeva. Effect of short- and long-term low temperature treatments on photosynthetic rate and stomatal conductance in Cucumis sativus L. leaves at different growth phases // Transactions of Karelian Research Centre of Russian Academy of Science. No 5. Experimental biology. 2014. Pp. 53-58
Keywords: Cucumis sativus L., net photosynthesis, stomatal conductance, temperature, leaf growth stages.
A comparative assessment of the temperature dependence of net photosynthesis and stomatal conductance in Cucumus sativus L. leaves exposed to longterm or daily shortterm temperature decreases to 12 °C during the initial lagphase (not yet unfolded leaf) or exponential growth phase (an unfolded actively growing leaf) was made. Constant exposure to 12 °C irrespective of the leaf growth stage resulted in a reduced photosynthetic rate of the leaves. In contrast, a periodic shortterm temperature drop increased the rate of photosynthesis. Leaves subjected to temperature drop treatment during the exponential growth phase increased the photosynthetic rate only at high temperatures, while the same temperature drop treatments during the lag phase caused an increase in the photosynthetic rate at both high and low temperatures, thereby significantly increasing the adaptive potential of the plants.
