Memorias de investigación
Communications at congresses:
Intra-annual patterns of tracheid size as an indicator of seasonal water stress in conifers
Year:2011

Research Areas
  • Ecology

Information
Abstract
Climatic conditions can affect xylem cell anatomy and hence series of intra-annual cell anatomical features have the potential to retrospectively supply seasonal climatic information. In this study we explored the possibility of extracting information about water stress conditions from tracheid features (lumen diameter and cell wall thickness) of the Mediterranean conifer Juniperus thurifera. Wood cores were sampled in three climate contrasting sites in Spain and Morocco and tracheid features were measured from xylem radial files of four selected years. Tracheidograms (a curve showing variations in tracheid features as a function of the cell position within an annual ring), built with the tgram R-package, were used to evaluate whether it is possible to link intra-annual pattern of tracheid features to seasonal climatic conditions. Results indicated site-specific anatomical adjustment, such as smaller and thicker-wall tracheids at the dryer sites, suggesting structural adjustments to avoid cavitation failure. Results also showed that the intra-annual pattern of tracheid size responded to seasonal changes in water availability, with smaller (larger) and thicker-wall (thinner-wall) tracheids formed under drought (wet) conditions. Thus wood cell anatomical features of conifers such as J. thurifera could be potentially used to reconstruct intra-annual changes in water availability.
International
Si
Congress
12th European Ecological Federation Congress
960
Place
Avila
Reviewers
Si
ISBN/ISSN
NA
Start Date
25/09/2011
End Date
29/09/2011
From page
260
To page
260
12th European Ecological Federation Congress. Abstract Book
Participants
  • Participante: Lucía DeSoto UNiversidad de Coimbra
  • Autor: Marcelino de la Cruz Rot UPM
  • Autor: Maria Joao Silva Universidad de Coimbra
  • Autor: Filipe Campelo Universidad de Coimbra
  • Autor: Cristina Nabais Universidad de Coimbra
  • Autor: Patrick Fonti WSL Swiss Federal Research Institute

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Biodiversidad y conservación de recursos fitogenéticos
  • Departamento: Biología Vegetal