Does shade improve light interception efficiency? A comparison among seedling from shade-tolerant and -intolerant temperate deciduous tree species - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue New Phytologist Année : 2006

Does shade improve light interception efficiency? A comparison among seedling from shade-tolerant and -intolerant temperate deciduous tree species

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 shadetolerant 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.

Dates et versions

hal-01189200 , version 1 (01-09-2015)

Identifiants

Citer

Sylvain Delagrange, Pierre Montpied, Erwin Dreyer, Christian Messier, Hervé Sinoquet. Does shade improve light interception efficiency? A comparison among seedling from shade-tolerant and -intolerant temperate deciduous tree species. New Phytologist, 2006, 172 (2), pp.293-304. ⟨10.1111/j.1469-8137.2006.01814.x⟩. ⟨hal-01189200⟩
74 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More