Morphophysiological Characteristics of Needles of Different Climatypes of Scots Pine in Provenance Trials
N. V. PAKHARKOVA1, N. A. KUZ’MINA2, S. R. KUZ’MIN2, A. A. EFREMOV1
1Siberian Federal University, 660041, Krasnoyarsk, Zvobodniy ave., 79
2V. N. Sukachev Institute of Forest RAS, 660036, Krasnoyarsk, Akademgorodok 52/80
Keywords: Scots pine (Pinus sylvestris L.), provenance trial, climatype, winter dormancy, fluorescence
Abstract
Differences in winter dormancy depth of Scots pine in provenance trials were revealed during the analysis of zero level of fluorescence parameters and chlorophylls and abscisic acid content. Obtained results correspond with the data received from the study of morphological features of needles and phenological observations. Trees of southern climatype, which differ in morphological features of needles and speed of phenophase transition, have deeper winter dormancy compared to the northern climatype. Due to climatic changes, trees of northern climatypes are expected to be more vulnerable during the periods of winter-spring thaws which previously were not typical for northern regions.
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