Adaptive Responses of Morphological Forms of the Pine (Pinus sylvestris L.) under Stressful Conditions of the Northern Taiga (in the Northern Dvina Basin)

Abstract

The variability of physiological and biochemical indicators and radial growth of different forms of Pinus sylvestris L. f. (var.) sulfuranthera Kozubow and f. (var.) erythranthera Sanio under flooding conditions has been studied. It is shown that the dynamics of photosynthetic pigments (chlorophylls and carotenoids), proline, proteins, ascorbic acid, peroxidase activity, and the light-harvesting complex in the pine needles depend on meteorologic factors and the phenophase. Forms with different colors of anthers differ in seasonal dynamics of the content of stressful metabolites and age variability of the radial growth of wood. Our results indicate that different forms of Pinus sylvestris L. have nuances in adaptation to stress conditions.