DelagrangeMontpiedDreyerEtAl2006

Référence

Delagrange, S., Montpied, P., Dreyer, E., Messier, C., Sinoquet, H. (2006) Does shade improve light interception efficiency? A comparison among seedlings from shade-tolerant and -intolerant temperate deciduous tree species. New Phytologist, 172(2):293-304. (Scopus )

Résumé

· Here, we tested two hypotheses: shading increases light interception efficiency (LIE) of broadleaved tree seedlings, and shade-tolerant species exhibit larger LIEs than do shade-intolerant ones. The impact of seedling size was taken into account to detect potential size-independent effects on LIE. LIE was defined as the ratio of mean light intercepted by leaves to light intercepted by a horizontal surface of equal area. · Seedlings from five species differing in shade tolerance (Acer saccharum, Betula alleghaniensis, A. pseudoplatanus, B. pendula, Fagus sylvatica) were grown under neutral shading nets providing 36, 16 and 4% of external irradiance. Seedlings (1- and 2-year-old) were three-dimensionally digitized, allowing calculation of LIE. · Shading induced dramatic reduction in total leaf area, which was lowest in shade-tolerant species in all irradiance regimes. Irradiance reduced LIE through increasing leaf overlap with increasing leaf area. There was very little evidence of significant size-independent plasticity of LIE. · No relationship was found between the known shade tolerance of species and LIE at equivalent size and irradiance. © The Authors (2006).

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@ARTICLE { DelagrangeMontpiedDreyerEtAl2006,
    AUTHOR = { Delagrange, S. and Montpied, P. and Dreyer, E. and Messier, C. and Sinoquet, H. },
    TITLE = { Does shade improve light interception efficiency? A comparison among seedlings from shade-tolerant and -intolerant temperate deciduous tree species },
    JOURNAL = { New Phytologist },
    YEAR = { 2006 },
    VOLUME = { 172 },
    PAGES = { 293-304 },
    NUMBER = { 2 },
    ABSTRACT = { · Here, we tested two hypotheses: shading increases light interception efficiency (LIE) of broadleaved tree seedlings, and shade-tolerant species exhibit larger LIEs than do shade-intolerant ones. The impact of seedling size was taken into account to detect potential size-independent effects on LIE. LIE was defined as the ratio of mean light intercepted by leaves to light intercepted by a horizontal surface of equal area. · Seedlings from five species differing in shade tolerance (Acer saccharum, Betula alleghaniensis, A. pseudoplatanus, B. pendula, Fagus sylvatica) were grown under neutral shading nets providing 36, 16 and 4% of external irradiance. Seedlings (1- and 2-year-old) were three-dimensionally digitized, allowing calculation of LIE. · Shading induced dramatic reduction in total leaf area, which was lowest in shade-tolerant species in all irradiance regimes. Irradiance reduced LIE through increasing leaf overlap with increasing leaf area. There was very little evidence of significant size-independent plasticity of LIE. · No relationship was found between the known shade tolerance of species and LIE at equivalent size and irradiance. © The Authors (2006). },
    COMMENT = { Cited By (since 1996): 8 Export Date: 10 February 2010 Source: Scopus CODEN: NEPHA doi: 10.1111/j.1469-8137.2006.01814.x },
    ISSN = { 0028646X (ISSN) },
    KEYWORDS = { Forest regeneration, Light interception efficiency (LIE), Phenotypic plasticity, Shade tolerance, Silhouette:total area ratio (STAR), comparative study, hypothesis testing, irradiance, leaf area, light effect, seedling emergence, shade tolerance, article, biological model, comparative study, growth, development and aging, histology, microclimate, plant leaf, seedling, sunlight, tree, Microclimate, Models, Biological, Plant Leaves, Seedling, Sunlight, Trees, Acer, Acer pseudoplatanus, Acer saccharum, Betula alleghaniensis, Fagus, Fagus sylvatica },
    OWNER = { Luc },
    TIMESTAMP = { 2010.02.10 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-33748766623&partnerID=40&md5=6d4aafddc2c43768209f0974cc0821a4 },
}

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