Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Xylem anatomy and vulnerability to cavitation are related to elm species distribution in the Iberian Peninsula
Research Areas
  • Plant physiology
There are three native elm species in the Iberian Peninsula: Ulmus glabra Huds, U. laevis Pall., and U. minor Mill.. The first species lives in cool valleys, associated to sub-riparian and riparian species, or as an escort species in eurosiberian forests. Meanwhile, U. laevis grows in riparian forests, and is one of the rare European trees that thrives in seasonal waterlogged soils. Lastly, U. minor lives in flood plain forests and is adapted to warmer climates. Since their habitats differ in ground water availability, we evaluated firstly if vulnerability to xylem embolism caused by water-stress has been a determinant factor affecting their distribution, and second, if their xylem anatomy differs due to water availability dissimilarities. We found clear differences in conductivity and cavitation vulnerability between the three species. Maximum xylem specific conductivity and maximum leaf specific conductivity were two to three times higher in U. glabra. Although the three species were highly vulnerable to cavitation, U. minor was significantly more resistant to water stress cavitation. This species reached 50 % loss conductivity at -1.1 MPa, while U. glabra at -0.5 MPa, and U. laevis at -0.4 MPa. In relation to xylem structure, U. minor had higher wood density and more xylem rays; U. laevis presented higher vessel frequency and percentage of grouped vessels; and U. glabra had the widest vessels. In short, U. minor higher resistance to water-stress cavitation permits this species withstand light summer droughts, while xylem structure favours a more efficient water transport in U. glabra and U. laevis.
International Symposium on Wood Structure in Plant Biology and Ecology
Nápoles, Italia
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End Date
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International Symposium on Wood Structure in Plant Biology and Ecology
  • Autor: Martín David Venturas . (UPM)
  • Autor: Rosa Ana Lopez Rodriguez (UPM)
  • Autor: Antonio Gascó
  • Autor: Luis Alfonso Gil Sanchez (UPM)
  • Autor: Juan Antonio Martin Garcia (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Genética y Fisiología Forestal
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)