Titre du document / Document title

Photosynthetic and structural acclimation to light direction in vertical leaves of Silphium terebinthinaceum

Auteur(s) / Author(s)

POULSON M. E. ; DELUCIA E. H. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

Univ. Illinois, dep. plant biology, Urbana IL 61801, ETATS-UNIS

Résumé / Abstract

The azimuth of vertical leaves of Silphium terebinthinaceum profoundly influenced total daily irradiance as well as the proportion of direct versus diffuse light incident on the adaxial and abaxial leaf surface. These differences caused structural and physiological adjustments in leaves that affected photosynthetic performance. Leaves with the adaxial surface facing East received equal daily integrated irradiance on each surface, and these leaves had similar photosynthetic rates when irradiated on either the adaxial or abaxial surface. The adaxial surface of East-facing leaves was also the only surface to receive more direct than diffuse irradiance and this was the only leaf side which had a clearly defined columnar palisade layer (...)

Revue / Journal Title

Oecologia   ISSN 0029-8549   CODEN OECOBX 

Source / Source

1993, vol. 95, n^o3, pp. 393-400 (39 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Berlin, ALLEMAGNE  (1968) (Revue)

Mots-clés anglais / English Keywords

Photosynthesis ; Direction ; Light ; Adaptation ; Plant leaf ; Vertical distribution ; Symmetry ; Anatomy ; Spatial orientation ; Environmental factor ; Compositae ; Dicotyledones ; Angiospermae ; Spermatophyta ;

Mots-clés français / French Keywords

Photosynthèse ; Direction ; Lumière ; Adaptation ; Feuille végétal ; Répartition verticale ; Symétrie ; Anatomie ; Orientation spatiale ; Silphium terebinthinaceum ; Facteur milieu ; Compositae ; Dicotyledones ; Angiospermae ; Spermatophyta ;

Mots-clés espagnols / Spanish Keywords

Fotosíntesis ; Dirección ; Luz ; Adaptación ; Hoja vegetal ; Distribución vertical ; Simetría ; Anatomía ; Orientación espacial ; Factor medio ; Compositae ; Dicotyledones ; Angiospermae ; Spermatophyta ;

Localisation / Location

INIST-CNRS, Cote INIST : 3568 B, 35400004771375.0140