Concentration and 13C of leaf carbohydrates in relation to gas exchange in quercus robur under elevated CO2 and drought / C. Picon (1997)

Public ISBD 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 carbone Résumé : 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 carbone Résumé : 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

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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)

Public ISBD 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

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Pollution diffuse et gestion du milieu agricole : transferts comparés de phosphore et d'azote dans un petit bassin versant agricole / Jean-Marcel Dorioz (1994)

Public ISBD 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 ; SUISSE Type 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 ; SUISSE Type de document : Livre Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=123672

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Reverse phenology nd dry season water uptake by faidherbia albida (del.) A. Chev. in an agroforestry parkland of sudanese west africa / O. Roupsard (1999)

Public ISBD 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 ; SAPFLOW Type 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 ; SAPFLOW Type de document : Tiré à part Permalien de la notice : https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=150560

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