LODEX : sémantisation & visualisation

Site exemple

Title

Elevated growth temperatures alter hydraulic characteristics in trembling aspen (Populus tremuloides) seedlings: implications for tree drought tolerance

Publication Year

2013

Author(s)
  • Way, Danielle A.
  • Domec, Jean-Christophe
  • Jackson, Robert B.
Source
PLANT CELL AND ENVIRONMENT Volume: 36 Issue: 1 Pages: 103-115 Published: 2013
ISSN
0140-7791
Abstract

Although climate change will alter both soil water availability and evaporative demand, our understanding of how future climate conditions will alter tree hydraulic architecture is limited. Here, we demonstrate that growth at elevated temperatures (ambient +5 degrees C) affects hydraulic traits in seedlings of the deciduous boreal tree species Populus tremuloides, with the strength of the effect varying with the plant organ studied. Temperature altered the partitioning of hydraulic resistance, with greater resistance attributed to stems and less to roots in warm-grown seedlings (P < 0.02), and a 46% (but marginally significant, P = 0.08) increase in whole plant conductance at elevated temperature. Vulnerability to cavitation was greater in leaves grown at high than at ambient temperatures, but vulnerability in stems was similar between treatments. A soilplantatmosphere (SPA) model suggests that these coordinated changes in hydraulic physiology would lead to more frequent drought stress and reduced water-use efficiency in aspen that develop at warmer temperatures. Tissue-specific trade-offs in hydraulic traits in response to high growth temperatures would be difficult to detect when relying solely on whole plant measurements, but may have large-scale ecological implications for plant water use, carbon cycling and, possibly, plant drought survival.

Author Keyword(s)
  • cavitation vulnerability
  • climate change
  • embolism
  • poplar
  • transpiration
  • water
  • xylem
KeyWord(s) Plus
  • WATER TRANSPORT
  • STOMATAL CONDUCTANCE
  • XYLEM CAVITATION
  • PONDEROSA PINE
  • WOODY-PLANTS
  • LEAF LAMINA
  • CO2
  • MODEL
  • PHOTOSYNTHESIS
  • VULNERABILITY
ESI Discipline(s)
  • Plant & Animal Science
Web of Science Category(ies)
  • Plant Sciences
Adress(es)

[Way, Danielle A.; Jackson, Robert B.] Duke Univ, Dept Biol, Durham, NC 27708 USA; [Way, Danielle A.; Domec, Jean-Christophe; Jackson, Robert B.] Duke Univ, Nicholas Sch Environm, Durham, NC 27708 USA; [Domec, Jean-Christophe] Univ Bordeaux, Bordeaux Sci AGRO, INRA, TCEM,UMR 1220, F-33175 Gradignan, France

Reprint Adress

Way, DA (reprint author), Univ Western Ontario, Dept Biol, London, ON, Canada.

Country(ies)
  • Canada
  • France
  • United States
CNRS - Adress(es)

Error: empty list

Accession Number
WOS:000311974000007
uid:/98CDTFM6
Powered by Lodex 8.21.4