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Auteur A. Ferhi |
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Concentration and 13C of leaf carbohydrates in relation to gas exchange in quercus robur under elevated CO2 and drought / C. Picon (1997)
Titre : Concentration and 13C of leaf carbohydrates in relation to gas exchange in quercus robur under elevated CO2 and drought Type de document : texte imprimé Auteurs : C. Picon, Auteur ; A. Ferhi, Auteur ; Jean Marc Guehl, Auteur Editeur : Oxford University Press Année de publication : 1997 Importance : pp. 1547-1556 Présentation : graph., tabl., réf. Note générale : Extrait de Journal of Experimental Botany - Vol.48 - n°8 Langues : Anglais (eng) Catégories : Thésaurus Agrovoc
Croissance ; Quercus robur ; Évaporation ; Déficit hydrique du sol ; Échange gazeux ; Dioxyde de carboneRésumé : The variations of leaf carbohydrate concentration, carbon isotope discrimination of leaf soluble carbohydrate, gas-exchange and growth during a soil drying cycle under 350 and 700 umol mol-1 CO2 concentrations ([CO2]) in Quercus robur seedlings were analysed. In well-watered conditions, a doubling of [CO2] caused an increase of CO2 assimilation rate (A) (+47%) and a decrease of stomatal conductance for water vapour (g) (-25%), and doubled the intrinsic water-use efficiency (A/g). The values of were not affected by elevated [CO2] which was consistent with the 2-fold increase of A/g. Elevated [CO2] also significantly increased sucrose and starch leaf concentrations as well as aerial growth and plant dry weight. The stimulating effect of CO2 enrichment on A and A/g was maintained in moderate drought conditions, but disappeared in the most severe drought conditions. Drought induced an increase of hexose concentrations in both [CO2], but this effect was more pronounced under elevated [CO2], which may contribute o increase osmoregulation. From the onset of drought, starch was depleted in both [CO2]. Carbon isotope discrimination decreased in response to drought, which corresponded to an increase in A/g according to the two-step model of isotopic discrimination. In contrast, the A/g values derived from instantaneous leaf gas-exchange measurements decreased along the drying cycle. The discrepancy observed between the two independent estimates of water-use efficiency is discussed in terms of time-scale integration. The results obtained with the isotopic approach using soluble carbohydrate suggest a predominant stomatal limitation of CO2 assimilation in response to drought. Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=149651 Concentration and 13C of leaf carbohydrates in relation to gas exchange in quercus robur under elevated CO2 and drought [texte imprimé] / C. Picon, Auteur ; A. Ferhi, Auteur ; Jean Marc Guehl, Auteur . - [S.l.] : Oxford University Press, 1997 . - pp. 1547-1556 : graph., tabl., réf.
Extrait de Journal of Experimental Botany - Vol.48 - n°8
Langues : Anglais (eng)
Catégories : Thésaurus Agrovoc
Croissance ; Quercus robur ; Évaporation ; Déficit hydrique du sol ; Échange gazeux ; Dioxyde de carboneRésumé : The variations of leaf carbohydrate concentration, carbon isotope discrimination of leaf soluble carbohydrate, gas-exchange and growth during a soil drying cycle under 350 and 700 umol mol-1 CO2 concentrations ([CO2]) in Quercus robur seedlings were analysed. In well-watered conditions, a doubling of [CO2] caused an increase of CO2 assimilation rate (A) (+47%) and a decrease of stomatal conductance for water vapour (g) (-25%), and doubled the intrinsic water-use efficiency (A/g). The values of were not affected by elevated [CO2] which was consistent with the 2-fold increase of A/g. Elevated [CO2] also significantly increased sucrose and starch leaf concentrations as well as aerial growth and plant dry weight. The stimulating effect of CO2 enrichment on A and A/g was maintained in moderate drought conditions, but disappeared in the most severe drought conditions. Drought induced an increase of hexose concentrations in both [CO2], but this effect was more pronounced under elevated [CO2], which may contribute o increase osmoregulation. From the onset of drought, starch was depleted in both [CO2]. Carbon isotope discrimination decreased in response to drought, which corresponded to an increase in A/g according to the two-step model of isotopic discrimination. In contrast, the A/g values derived from instantaneous leaf gas-exchange measurements decreased along the drying cycle. The discrepancy observed between the two independent estimates of water-use efficiency is discussed in terms of time-scale integration. The results obtained with the isotopic approach using soluble carbohydrate suggest a predominant stomatal limitation of CO2 assimilation in response to drought. Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=149651 Réservation
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Localisation Emplacement Section Cote Support Code-barres Disponibilité Kourou Archives AgroParisTech-Kourou TP6617 (E) Papier Périodique 11505 Empruntable Pioneer and late stage tropical rainforest tree species (French Guyana) growing under common conditions differ in leaf gas exchange regulation, carbon isotope discrimination and leaf water potential / R. Huc (1994)
Titre : Pioneer and late stage tropical rainforest tree species (French Guyana) growing under common conditions differ in leaf gas exchange regulation, carbon isotope discrimination and leaf water potential Type de document : texte imprimé Auteurs : R. Huc ; A. Ferhi ; Jean Marc Guehl Editeur : Springer Verlag Année de publication : 1994 Importance : tabl., graph., 36 réf.-p. 297-305 Langues : Anglais (eng) Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=148151 Pioneer and late stage tropical rainforest tree species (French Guyana) growing under common conditions differ in leaf gas exchange regulation, carbon isotope discrimination and leaf water potential [texte imprimé] / R. Huc ; A. Ferhi ; Jean Marc Guehl . - [S.l.] : Springer Verlag, 1994 . - tabl., graph., 36 réf.-p. 297-305.
Langues : Anglais (eng)
Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=148151 Réservation
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Localisation Emplacement Section Cote Support Code-barres Disponibilité Kourou AgroParisTech-Kourou SI TP13068 Papier KOU-13068 Empruntable Kourou AgroParisTech-Kourou SI TP4864 Papier KOU-04864 Empruntable Kourou AgroParisTech-Kourou SI TP4996 Papier KOU-04996 Empruntable Kourou AgroParisTech-Kourou SI TP4997 Papier KOU-04997 Empruntable Pollution diffuse et gestion du milieu agricole : transferts comparés de phosphore et d'azote dans un petit bassin versant agricole / Jean-Marcel Dorioz (1994)
Titre : Pollution diffuse et gestion du milieu agricole : transferts comparés de phosphore et d'azote dans un petit bassin versant agricole Titre original : non-point pollution and management of agricultural areas: phosphorus and nitrogen transfer in an agricultural watershed Type de document : texte imprimé Auteurs : Jean-Marcel Dorioz ; A. Ferhi Année de publication : 1994 Importance : p.395-410 Langues : Français (fre) Catégories : Thésaurus Agrovoc
Union européenne ; Bassin versant ; Pollution de l'eau ; Eutrophisation ; Qualité de l'eau ; Azote ; Phosphore ; Marécage ; Agriculture
Liste Plan de classement
3251 (pollution agricole) [Classement Montpellier]
Ancienne liste Géo
LAC LEMAN ; SUISSEType de document : Livre Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=123672 Pollution diffuse et gestion du milieu agricole : transferts comparés de phosphore et d'azote dans un petit bassin versant agricole = non-point pollution and management of agricultural areas: phosphorus and nitrogen transfer in an agricultural watershed [texte imprimé] / Jean-Marcel Dorioz ; A. Ferhi . - 1994 . - p.395-410.
Langues : Français (fre)
Catégories : Thésaurus Agrovoc
Union européenne ; Bassin versant ; Pollution de l'eau ; Eutrophisation ; Qualité de l'eau ; Azote ; Phosphore ; Marécage ; Agriculture
Liste Plan de classement
3251 (pollution agricole) [Classement Montpellier]
Ancienne liste Géo
LAC LEMAN ; SUISSEType de document : Livre Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=123672 Réservation
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Localisation Emplacement Section Cote Support Code-barres Disponibilité Montpellier Magasin 3 Gestion de l'eau 3251 DOR Papier 33004000799562 Empruntable Reverse phenology nd dry season water uptake by faidherbia albida (del.) A. Chev. in an agroforestry parkland of sudanese west africa / O. Roupsard (1999)
Titre : Reverse phenology nd dry season water uptake by faidherbia albida (del.) A. Chev. in an agroforestry parkland of sudanese west africa Type de document : texte imprimé Auteurs : O. Roupsard ; A. Ferhi ; André Granier ; F. Pallo ; D. Depommier ; B. Mallet ; Hélène I. Joly ; Erwin Dreyer Editeur : British Ecological Society Année de publication : 1999 Collection : Functional Ecology num. 13 Importance : p. 1-13, 8 graph., 2 tabl., 39 réf. Langues : Anglais (eng) Catégories : Autres descripteurs
AGROFORESTRY ; DROUGHT ; OXYGEN ISOTOPE ; PHREATOPHYTE ; SAPFLOWType de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=150560 Reverse phenology nd dry season water uptake by faidherbia albida (del.) A. Chev. in an agroforestry parkland of sudanese west africa [texte imprimé] / O. Roupsard ; A. Ferhi ; André Granier ; F. Pallo ; D. Depommier ; B. Mallet ; Hélène I. Joly ; Erwin Dreyer . - GB : British Ecological Society, 1999 . - p. 1-13, 8 graph., 2 tabl., 39 réf.. - (Functional Ecology; 13) .
Langues : Anglais (eng)
Catégories : Autres descripteurs
AGROFORESTRY ; DROUGHT ; OXYGEN ISOTOPE ; PHREATOPHYTE ; SAPFLOWType de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=150560 Réservation
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Localisation Emplacement Section Cote Support Code-barres Disponibilité Kourou AgroParisTech-Kourou SI TP17485 Papier KOU-17485 Empruntable