Mass- and Area-Based Contents in Nitrogen, Proteins, and Chlorophyll within Crowns of Balsam Fir (Abies balsamea) and Black Spruce (Picea mariana) Trees Located along a Temperature Gradient

The variation in nitrogen, insoluble and soluble proteins, and chlorophyll concentrations (mg·g-1) and contents per unit leaf area (mg·cm-2) as a function of specific leaf area (SLA) was examined in leaves sampled at the bottom, middle, and upper sections of the crowns of balsam fir (Abies balsamea)...

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Veröffentlicht in:Écoscience (Sainte-Foy) 2014-01, Vol.21 (3–4), p.242-252
Hauptverfasser: Larocque, Guy R., Lapointe, Line, Paré, David, Boutin, Robert, Lacerte, Valérie
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container_issue 3–4
container_start_page 242
container_title Écoscience (Sainte-Foy)
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creator Larocque, Guy R.
Lapointe, Line
Paré, David
Boutin, Robert
Lacerte, Valérie
description The variation in nitrogen, insoluble and soluble proteins, and chlorophyll concentrations (mg·g-1) and contents per unit leaf area (mg·cm-2) as a function of specific leaf area (SLA) was examined in leaves sampled at the bottom, middle, and upper sections of the crowns of balsam fir (Abies balsamea) and black spruce (Picea mariana) trees located along a temperature gradient in Quebec, Canada. Differences in needle dimensions, mass, surface, and SLA among crown sections and needle age were more pronounced for balsam fir than for black spruce. Relationships of foliage nitrogen, insoluble and soluble proteins, and chlorophyll content per unit leaf area as a function of SLA were generally more significant than those based on concentration. However, the different variables varied little along a temperature gradient. The higher significance of area-based relationships in comparison with mass-based relationships was attributed to the change in leaf morphology in response to light availability within the crown. Yet, nitrogen availability most likely restricted light acclimation to changes in morphology, since there was very limited modulation of nitrogen partitioning among the different protein fractions as a function of light environment.
doi_str_mv 10.2980/21-%283-4%29-3683
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identifier ISSN: 1195-6860
ispartof Écoscience (Sainte-Foy), 2014-01, Vol.21 (3–4), p.242-252
issn 1195-6860
2376-7626
language eng
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source JSTOR Archive Collection A-Z Listing
subjects Abies balsamea
acclimation
allocation de l'azote
chlorophyll
chlorophylle
gradient de température
leaf area
leaves
needle dimensions
nitrogen
nitrogen content
nitrogen partitioning
Picea mariana
proteins
protéines
specific leaf area
surface foliaire spécifique
taille des aiguilles
temperature
temperature gradient
trees
title Mass- and Area-Based Contents in Nitrogen, Proteins, and Chlorophyll within Crowns of Balsam Fir (Abies balsamea) and Black Spruce (Picea mariana) Trees Located along a Temperature Gradient
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