Transactions of KarRC RAS :: Scientific publications
Transactions of KarRC RAS :: Scientific publications

Transactions of KarRC RAS :: Scientific publications
Karelian Research Centre of RAS
ISSN (print): 1997-3217
ISSN (online): 2312-4504
Transactions of KarRC RAS :: Scientific publications
Background Editorial committee Editorial Office Statute For authors For reviewer Russian version
Transactions of KarRC RAS :: Scientific publications

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SCIENTIFIC PUBLICATIONS
Болондинский В.К , Виликайнен Л.М.
Исследование световой зависимости фотосинтеза у карельской березы и березы повислой в условиях разной обеспеченности элементами минерального питания
// Труды КарНЦ РАН. No 5. Сер. Экспериментальная биология. 2014. C. 207-213
Bolondinskii V.K., Vilikainen L.M. Research of photosynthesis light dependence in Karelian birch and common (silver) birch in different mineral nutrient availability settings // Transactions of Karelian Research Centre of Russian Academy of Science. No 5. Experimental biology. 2014. Pp. 207-213
Keywords: Betula L., Karelian birch, СО2 gas exchange, respiration, light response curve for net photosynthesis.
A comparative estimation of CO2 gas exchange in leaves of common (silver) birch (Betula pendula var. pendula) and Karelian birch (Betula pendula var. сarelica) was carried out at different levels of mineral nutrition. After an additional fertilizing, saplings growing in pots under high insolation showed the 1.4-fold increase in average rates of CO2 gas exchange. Dark respiration in common birch increased 2.3-fold and became almost twice that of Karelian birch. Except for this parameter, no significant differences between the two forms of birch were revealed. Fertilized saplings adapted to low levels of solar radiation showed significant differences in the parameters of light response curves: the light compensation point and the saturation constant. Lower values of these parameters in Karelian birch indicate its effective utilization of low values of solar radiation, allowing it to survive under the conditions of strong shadow.
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