Bud break and spring frost hardiness in Picea abies seedlings in response to photoperiod and temperature treatments

Inger Sundheim Fløistad; Aksel Granhus

doi:10.1139/x10-050

journal article May 01, 2010

Bud break and spring frost hardiness in Picea abies seedlings in response to photoperiod and temperature treatments

Inger Sundheim Fløistad Aksel Granhus

Canadian Journal of Forest Research Vol. 40 No. 5 pp. 968-976 · Canadian Science Publishing

View at Publisher Save 10.1139/x10-050

Abstract

Spring frost may result in detrimental damage in newly planted Picea abies (L.) Karst. seedlings if their growth rhythm is not sufficiently adapted to the climatic conditions on the forest site. The aims of this study were to evaluate how bud break and spring frost hardiness were influenced by short-day (SD) treatments with different timing and different temperature regimes during bud formation. Following winter storage, frost hardiness was tested after 1, 3 and 5 weeks in forcing conditions. The SD treatment advanced bud break compared with the control seedlings. In comparison, the effects of timing and the different temperatures on bud break were small. The SD treatment improved frost hardiness in first-year needles during dehardening. The early SD treatment resulted in improved frost hardiness in first-year needles and greater root collar diameter compared with later SD treatment. To avoid a second bud flush, it is important that a critical night length is attained when the SD treatment terminates. Low temperatures following the SD treatment resulted in increased hardiness of the needles and decreased hardiness of the stems. The contrasting effect of temperature in different plant tissues demonstrates the importance of examining different tissues following freezing tests.

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Details

Published: May 01, 2010
Vol/Issue: 40(5)
Pages: 968-976
License: View

Authors

I

Inger Sundheim Fløistad

Norwegian Institute for Agricultural and Environmental Research, Plant Health and Plant Protection Division, Høgskoleveien 7, NO-1432 Ås, Norway.; Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432 Ås, Norway.

A

Aksel Granhus

Norwegian Institute for Agricultural and Environmental Research, Plant Health and Plant Protection Division, Høgskoleveien 7, NO-1432 Ås, Norway.; Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432 Ås, Norway.

Cite This Article

Inger Sundheim Fløistad, Aksel Granhus (2010). Bud break and spring frost hardiness in Picea abies seedlings in response to photoperiod and temperature treatments. Canadian Journal of Forest Research, 40(5), 968-976. https://doi.org/10.1139/x10-050

Bud break and spring frost hardiness in Picea abies seedlings in response to photoperiod and temperature treatments

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