| Titre : | Growth, stomatal conductance and soil-to-leaf specific hydraulic conductance of quercus petraea, pinus pinaster and betula pendula saplings grown in different substrates and submitted to drought | | Type de document : | texte imprimé | | Auteurs : | C. Fort ; Erwin Dreyer ; André Granier | | Année de publication : | 1998 | | Importance : | 5 tabl., 23 graph., 49 réf.-20 p. | | Langues : | Anglais (eng) | | Catégories : | Thésaurus Agrovoc
Quercus petraea ; Pinus pinaster ; Betula pendula ; Croissance ; Sécheresse ; Potentiel hydrique
Autres descripteurs
SUBSTRATE ; GROWTH ; LEAF WATER POTENTIAL ; STOMATAL CONDUCTANCE ; SOIL-TO-LEAF SPECIFIC HYDRAULIC CONDUCTANCE ; WATER STRESS ; CONDUCTANCE
| | Résumé : | Plans of Quercus petraea, Pinus pinaster and Betula pendula were grown in three differnet substrates : SI, peat-sand mix (1: 2, v/v); SII, peat-sand mix (2: 1, v/v); and SIII peat-clay mix (1: 3, v/v) and submitted to drought stress. Large differences in growth and water relations were recorded among the three species. Under well-watered conditions, birch displayed higher values of stomatal conductance, of whole plant transpiration flux density, and of specific soil-to-leaf hydraulic conductivity than oak and pine. During stress, birch consumed all available water very quickly, but still displayed higher predawn leaf water potential than the 2 other species. Intense stomatal closure was recoded at higher values of predawn leaf water potential (close to -1.2 MPa) than in the two other species. At higher stress intensities, birch reduced drastically its transpiring area by leaf shedding. The clayey substrate (SIII) limited severely the growth of oaks, and
pines, but not of birches, without any apparent deficiency as evidenced by the mineral composition of the leaves. Water relations and stomatal conductance remained almost unaffected by substrate composition in the three species. With increasing water stress, the only difference observed among substrates was the time course of soil water depletion, due to differences in leaf area. Stomatal conductance and soil-to-leaf specific hydraulic conductance were well correlated in all species, but important interspecific differences occured; birches diffeed significantly from the two other species. "(Résumé des auteurs)". | | Type de document : | Tiré à part | | Permalien de la notice : | https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=145639 |
Growth, stomatal conductance and soil-to-leaf specific hydraulic conductance of quercus petraea, pinus pinaster and betula pendula saplings grown in different substrates and submitted to drought [texte imprimé] / C. Fort ; Erwin Dreyer ; André Granier . - 1998 . - 5 tabl., 23 graph., 49 réf.-20 p. Langues : Anglais ( eng) | Catégories : | Thésaurus Agrovoc
Quercus petraea ; Pinus pinaster ; Betula pendula ; Croissance ; Sécheresse ; Potentiel hydrique
Autres descripteurs
SUBSTRATE ; GROWTH ; LEAF WATER POTENTIAL ; STOMATAL CONDUCTANCE ; SOIL-TO-LEAF SPECIFIC HYDRAULIC CONDUCTANCE ; WATER STRESS ; CONDUCTANCE
| | Résumé : | Plans of Quercus petraea, Pinus pinaster and Betula pendula were grown in three differnet substrates : SI, peat-sand mix (1: 2, v/v); SII, peat-sand mix (2: 1, v/v); and SIII peat-clay mix (1: 3, v/v) and submitted to drought stress. Large differences in growth and water relations were recorded among the three species. Under well-watered conditions, birch displayed higher values of stomatal conductance, of whole plant transpiration flux density, and of specific soil-to-leaf hydraulic conductivity than oak and pine. During stress, birch consumed all available water very quickly, but still displayed higher predawn leaf water potential than the 2 other species. Intense stomatal closure was recoded at higher values of predawn leaf water potential (close to -1.2 MPa) than in the two other species. At higher stress intensities, birch reduced drastically its transpiring area by leaf shedding. The clayey substrate (SIII) limited severely the growth of oaks, and
pines, but not of birches, without any apparent deficiency as evidenced by the mineral composition of the leaves. Water relations and stomatal conductance remained almost unaffected by substrate composition in the three species. With increasing water stress, the only difference observed among substrates was the time course of soil water depletion, due to differences in leaf area. Stomatal conductance and soil-to-leaf specific hydraulic conductance were well correlated in all species, but important interspecific differences occured; birches diffeed significantly from the two other species. "(Résumé des auteurs)". | | Type de document : | Tiré à part | | Permalien de la notice : | https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=145639 |
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Ajouter le résultat dans votre panier Faire une suggestion Affiner la recherche Interroger des sources externesGas exchange in six tropical semi-deciduous forest canopy tree species during the wet and dry seasons / K.P. Hogan (1995)
