Skip to Main content Skip to Navigation
Theses

Caractéristiques hydrauliques, régulation stomatique et efficience d'utilisation de l'eau de quatre espèces de conifères méditerranéens (Cedrus atlantica, Cupressus sempervirens, Pinus halepensis et Pinus nigra)

Abstract : Interspecitïc variability,xylem hydraulic traits, stomatal regulation and intrinsic water use efficiency (Wi) have been studied in four Mediterranean conifer species, chosen for their response to drought stress. They have, presented large differences in hydraulic conductivity and vulnerability to cavitation, rankig from the most (P. nigra) to the least vulnerable species (C. atlantica, P. halepensis and C. sempervirens). During soil drought, stomatalclo sure occurred at xylem water potentials close to the threshold water potential of cavitation vulnerability. These results confirm the implication of stomata in limiting the development of the xylem embolism. Differences among species in [delta]13C and Wi were detected, vvith similar ranking for different experimental conditions. When, for each experimental condition, the data of all species were merged, a weak corelation was found between Wi and hydraulic conductance, however no such corelation was found between Wi and [delta]13C. Our results were used to propose an integrated hydraulic model.
Complete list of metadatas

https://hal.univ-lorraine.fr/tel-01754428
Contributor : Thèses Ul <>
Submitted on : Friday, March 30, 2018 - 9:48:54 AM
Last modification on : Tuesday, March 17, 2020 - 1:36:11 AM

File

SCD_T_2002_0029_FROUX.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01754428, version 1

Collections

Citation

Fabienne Froux. Caractéristiques hydrauliques, régulation stomatique et efficience d'utilisation de l'eau de quatre espèces de conifères méditerranéens (Cedrus atlantica, Cupressus sempervirens, Pinus halepensis et Pinus nigra). Sciences agricoles. Université Henri Poincaré - Nancy 1, 2002. Français. ⟨NNT : 2002NAN10029⟩. ⟨tel-01754428⟩

Share

Metrics

Record views

98

Files downloads

695