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Radiation and soil temperature interactions on the growth and physiology of eastern white pine (Pinus strobus L.) seedlings

Boucher Jean-François, Bernier Pierre Y. et Munson Alison D.. (2001). Radiation and soil temperature interactions on the growth and physiology of eastern white pine (Pinus strobus L.) seedlings. Plant and Soil, 236, (2), p. 165-174.

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URL officielle: http://dx.doi.org/doi:10.1023/A:1012763728049

Résumé

A greenhouse experiment was set up during one growing season to test the hypothesis that soil temperature controls a significant part of the light response of eastern white pine (Pinus strobus L.) seedlings that is observed in the field. The experimental design was a three by three factorial split-plot design, with three levels of light availability: 10%, 40% and 80% of full light; and three levels of soil temperature: 16 °C, 21 °C, and 26 °C in the soil at midday. The results show significant interactions between light and soil temperature factors on several variables (gas exchange, root growth, leaf-mass ratio and leaf–mass per unit area), but not on shoot dry mass. These interactions indicate that, in the field, a significant proportion of the light response of young eastern white pine could result from changes in soil temperature, especially under conditions of limiting water availability. Our results suggest that soil temperature must be taken explicitly into account as a driving variable when relating the growth of young eastern white pine to photosynthetic radiation.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:236
Numéro:2
Pages:p. 165-174
Version évaluée par les pairs:Oui
Date:2001
Sujets:Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Mots-clés:biomass allocation, gas exchange, PPFD, Pinus strobus, white pine, root growth, soil temperature, photosynthetic-photon flux density
Déposé le:21 janv. 2016 01:19
Dernière modification:05 déc. 2016 21:01
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