Climate Control of Bud Burst in Young Seedlings of Nine Provenances of Norway Spruce

Climatic control of bud burst in young seedlings of nine provenances of Norway spruce was assessed. Bud burst of terminal and lateral buds was monitored twice a week. An analysis of variance was performed with fixed effects models. Relationships between provenance origin and time to 50% bud burst we...

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Published in:Tree physiology 2008-02, Vol.28 (2), p.311-311
Main Authors: Sogaard, Gunnhild, Johnsen, Oystein, Nilsen, Jarle, Junttila, Olavi
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Johnsen, Oystein
Nilsen, Jarle
Junttila, Olavi
description Climatic control of bud burst in young seedlings of nine provenances of Norway spruce was assessed. Bud burst of terminal and lateral buds was monitored twice a week. An analysis of variance was performed with fixed effects models. Relationships between provenance origin and time to 50% bud burst were evaluated by linear regression analysis. Results showed that Norway spruce expressed a versatile and sometimes-complex response to environmental signals related to dormancy, and the timing of bud burst was affected more by environmental treatments than by provenance. No treatment prevented bud burst or onset of growth, indicating that young Norway spruce seedlings did not undergo true bud dormancy. High temperature during bud development significantly delayed bud burst.
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title Climate Control of Bud Burst in Young Seedlings of Nine Provenances of Norway Spruce
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