NDLI: Fertilization and allelopathy modify Pinus halepensis saplings crown acclimation to shade

Content Provider	Springer Nature Link
Author	Monnier, Yogan Vila, Bru Montès, Nicolas Bousquet Mélou, Anne Prévosto, Bernard Fernandez, Catherine
Copyright Year	2010
Abstract	Pinus halepensis Mill., is a Mediterranean pioneer forest species with shade-intolerant features. The purpose of this study is to better understand how stand fertility and allelopathic properties of adult trees influence shade acclimation of saplings. Crown growth and morphological plasticity were studied under different light, fertilization, and allelopathic conditions in a nursery experiment. We tested whether shade-acclimation capacity increases with fertilization, and is affected by autotoxicity due to pine leachates. We examined stem diameter, and crown characteristics (length, width, shape, and density) in a factorial experiment with two levels for each tested factor: light (full and 20% reduced light), fertilization (low and high rate of NPK fertilizer) and allelopathy (control and allelopathic leachates uptake). In our study, shading induced a significantly higher crown length, width, and surface. Fertilization strongly increased crown length and vertical expended crown shape (the ratio crown length/crown width). Leachates uptake reduced crown length and density, highlighting an autotoxicity phenomenon. We concluded that P. halepensis saplings presented a shade-avoiding syndrome and that the crown shade-acclimation response increased with fertilization but was severely compromised by autotoxicity. We finally discuss the role of fertilization and allelopathy in early P. halepensis acclimation ability.
Starting Page	497
Ending Page	507
Page Count	11
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	25
Issue Number	3
e-ISSN	14322285
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-12-09
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Crown plasticity Growth Light Fertilization Allelopathy Shade avoidance Plant Physiology Plant Sciences Agriculture Plant Anatomy/Development Forestry Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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Fertilization and allelopathy modify Pinus halepensis saplings crown acclimation to shade

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