J. For. Sci., 2004, 50(5):237-242 | DOI: 10.17221/4620-JFS

Changes in cold hardiness of silver fir and larch bare-rooted seedlings during autumn and spring

M. Sarvaš
Forest Research Institute Zvolen, Zvolen, Slovak Republic

The objective of this study was to obtain information about changes in cold hardiness of larch and silver fir seedlings during autumn and spring by help of measurements of electrolyte leakage from shoots (SEL) and root system (REL). The values of electrolyte leakage from the untreated (control) root system of silver fir decreased during autumn (from 28% on September 25 to 24% on November 27). Minimum values were reached on March 26. A decrease in electrolyte leakage was found for silver fir shoots (SEL) (the maximum was detected on October 2 - 12% and minimum on November 27 - 7%). Contrary to REL, SEL increased in March. The rate of electrolyte leakage from treated (after artificial frost) roots and shoots decreased during autumn (REL and SEL minimum on November 27). The change in the rate of electrolyte leakage from untreated larch roots was similar to that from silver fir roots during autumn. The values continually decreased from 26% (on September 25) to 12% (on November 27). The course of electrolyte leakage from the treated root system was similar for both species. The differences between electrolyte leakage from larch shoots (treated und untreated ones) were statistically significant, but without any clear tendency during autumn.

Keywords: cold hardiness; electrolyte leakage; larch and silver fir bare-rooted seedlings

Published: May 31, 2004  Show citation

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Sarvaš M. Changes in cold hardiness of silver fir and larch bare-rooted seedlings during autumn and spring. J. For. Sci. 2004;50(5):237-242. doi: 10.17221/4620-JFS.
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