Arrêt de service programmé du vendredi 10 juin 16h jusqu’au lundi 13 juin 9h. Pour en savoir plus
Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

A Simple Type of Wood in Two Early Devonian Plants

Abstract :

The advent of wood (secondary xylem) is a major event of the Paleozoic Era, facilitating the evolution of large perennial plants. The first steps of wood evolution are unknown. We describe two small Early Devonian (407 to 397 million years ago) plants with secondary xylem including simple rays. Their wood currently represents the earliest evidence of secondary growth in plants. The small size of the plants and the presence of thick-walled cortical cells confirm that wood early evolution was driven by hydraulic constraints rather than by the necessity of mechanical support for increasing height. The plants described here are most probably precursors of lignophytes.

Type de document :
Article dans une revue
Liste complète des métadonnées
Contributeur : Okina Univ Angers Connectez-vous pour contacter le contributeur
Soumis le : lundi 5 juillet 2021 - 14:24:47
Dernière modification le : lundi 9 mai 2022 - 11:58:08



P. Gerrienne, P. Gensel, Christine Strullu-Derrien, H. Lardeux, P. Steemans, et al.. A Simple Type of Wood in Two Early Devonian Plants. Science, American Association for the Advancement of Science (AAAS), 2011, 333 (6044), pp.837. ⟨10.1126/science.1208882⟩. ⟨hal-03278282⟩



Consultations de la notice