, Volume 3, Issue 2, pp 245-251
Date: 07 May 2010

Dependence of the annual-ring structure in the stem and structural roots of Scots pine (Pinus sylvestris L.) on environmental factors in the forest-steppe zone of Prebaikalia

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Abstract

It was established on the basis of the data of perennial surveys that the annual growth of the layer of early tracheids of the stem and structural roots of pine correlated with each other (r = 0.72−0.73). The sizes of annual rings in the organs studied were determined mainly by the width of the layer of early tracheids (r 2 = 83−92%) and were 50% dependent on their radial diameter for the stem and less than 20% dependent for the structural roots. The width of the layer of early and late tracheids in the stem and structural roots was significantly correlated with heat and water availability, and the radial diameter of early and later tracheids was determined mainly by the temperature conditions of the environment. The combined effect of air and soil temperature, air humidity, and precipitation on the annual-ring structure in the stem and structural roots, except on the width of the layer of late tracheids, was 34–58%.

Original Russian Text © V.F. Zabuga, G.A. Zabuga, 2010, published in Sibirskii Ekologicheskii Zhurnal, 2010, Vol. 17, No. 2, pp. 347–355.