Siberian Federal University

Issue

Journal of Siberian Federal University. Biology. 2009 2 (1)

Authors

Zotikova, Albina P.; Bender, Olga.G.

Contact information

Zotikova, Albina P.: Institute for Monitoring of Climatic and Ecological Systems, Siberian Branch of Russian Academy of Science 10/3 Academichesky, Tomsk, 634055 Russia; ; Bender, Olga.G.: Institute for Monitoring of Climatic and Ecological Systems, Siberian Branch of Russian Academy of Science 10/3 Academichesky, Tomsk, 634055 Russia

Keywords

Pinus sibirica; Pinus sibirica; altitude; needle morphology; pigment contents; chloroplast functional activity

Abstract

Needle morphology, photosynthetic pigment contents and chloroplast functional activity were measured in the four Siberian Stone pine stands: the subalpine (1570 and 1700 m asl) and the timberline (1900 and 2000 m asl). At the high altitudes the length, assimilation surfaces and mass needles were decreased. At the timberline the needles had necrotic and chlorotic areas. Chlorophyll (a+b) and carotenoid contents, chloroplast functional activity at the level of photosystem II: the Hill reaction rate and noncyclic photophosphorylation were decreased with increasing elevation. Probably, reduced pigment contents and low activity of photosynthetic process were induced by low temperature and photooxidation. Due to morphological and physiological adaptation Siberian Stone pine trees supported growth and reproduction ability.

Pages

80-89

Paper at repository of SibFU

https://elib.sfu-kras.ru/handle/2311/1222

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).