Paleobotanical Wood Anatomy and Evolution
Summary
Paleobotanical wood anatomy examines the cellular and structural characteristics of fossil wood to trace the origin and diversification of woody tissues through deep time. By comparing secondary xylem in extinct and extant lineages, researchers have documented the emergence of vessel elements in early angiosperms, shifts in ray architecture and axial parenchyma distribution, and the development of tyloses and other occlusions. These anatomical innovations correlate with major climatic transitions—such as the Cretaceous angiosperm radiation and Cenozoic cooling—and illuminate how wood anatomy responded to environmental pressures including drought, freezing, and increased atmospheric CO₂. Integrating anatomical data with phylogenetics and geochemistry, this field refines reconstructions of palaeoecology, biogeographic dispersal routes, and ecosystem resilience after mass extinctions. Beyond academic interest, insights into ancient wood traits inform modern forestry, carbon sequestration models and the evolutionary basis of wood‐inspired biomaterials.
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Paleobotanical Wood Anatomy and Evolution publication trend
The graph below shows the total number of articles in paleobotanical wood anatomy and evolution across all publications each year (not limited to Nature Index journals).
Technical terms
Secondary xylem: Woody tissue formed inward from the vascular cambium, comprising vessel elements, fibres and parenchyma.
Vessel element: Elongate, water‐conducting cell in angiosperm wood, joined end to end to form vessels.
Axial parenchyma: Longitudinal parenchyma cells in wood that store nutrients and may aid in water transport.
Ray: Radial file of parenchyma cells extending from the pith to the bark, involved in lateral transport and storage.
Tylose: Outgrowth of parenchyma cell protoplasts into a vessel lumen, often blocking water flow and pathogen entry.
References
- Cenozoic woods from Termas de Río Hondo, Santiago del Estero, Argentina. Revista del Museo Argentino de Ciencias Naturales (2019).
- Wood anatomy of tribe Detarieae and comparison with tribe Caesalpinieae (Leguminosae, Caesalpinioideae) in Venezuela. Revista de Biología Tropical (2009).
- “Fossil woods from the Miocene of Costa Rica and Nicaragua: Insights into the Neotropical floral puzzle”. Journal of South American Earth Sciences (2024).
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