NDLI: The influence of site characteristics on the leaf-to-sapwood area relationship in chestnut trees (Castanea sativa Mill.)

Content Provider	Springer Nature Link
Author	Gehring, Eric Pezzatti, Gianni Boris Krebs, Patrik Mazzoleni, Stefa Zappa, Massimilia Conedera, Marco
Copyright Year	2016
Abstract	Biomass allocation in Castanea sativa varies according to the environmental conditions. Specifically, leaf-to-sapwood area ratio is higher on sites with good water supplies and lower in water-stressed conditions. Ecological plasticity allows organisms to adapt and to cope with environmental conditions. This is a key trait for species with long live span, which will probably be more vulnerable to changing climate because of their lower adaptation potential via natural selection. We studied the case of the sweet chestnut tree, a naturalized forest species in many European mountain areas, where it grows on very different climates and sites. This raises the question of its adaptation capacity to very different environmental conditions. To test this hypothesis, we applied the pipe model approach for analysing the variation in the leaf-to-sapwood area ratio (A L:A S) in 82 chestnut trees growing in very different site conditions (e.g., water-stressed convex vs. water-rich concave sites). We used linear regression analyses to model the A L:A S relationship to environmental and dendrometric parameters. Results confirm that A L:A S is significantly higher when trees grow on good nutrient- and water-supplied concave sites with respect to water-stressed, convex sites. Chestnut trees are thus able to vary their biomass allocation between sapwood and leaves to adapt their hydraulic characteristics to the site conditions. Trees seem to react to water-stressed conditions by allocating more biomass in the sapwood in respect to the leaves. A L:A S may thus represent a useful indicator of tree species plasticity and their adaptation potential to different environmental and climate conditions.
Starting Page	2217
Ending Page	2226
Page Count	10
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	30
Issue Number	6
e-ISSN	14322285
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-08-02
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Autoecology Ecological plasticity Hydraulic architecture Pipe model Resource allocation Water availability Forestry Plant Sciences Agriculture Plant Anatomy/Development Plant Pathology Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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