AustralieFrV1, PascalFrancis, Corpus, bibRecord, 002803

Control of leaf growth by abscisic acid: hydraulic or non-hydraulic processes?

Identifieur interne : 002803 ( PascalFrancis/Corpus ); précédent : 002802; suivant : 002804

Control of leaf growth by abscisic acid: hydraulic or non-hydraulic processes?

Auteurs : François Tardieu ; Boris Parent ; Thierry Simonneau

Source :

Plant, cell and environment : (Print) [ 0140-7791 ] ; 2010.

RBID : Pascal:10-0150810

Descripteurs français

Pascal (Inist)
- Croissance, Feuille végétal, Hydraulique, Processus, Expansion, Conductance stomatique, Conductivité hydraulique, Aquaporine, Organisme génétiquement modifié, Acide abscissique, Eau, <<>>, Ecologie végétale.

English descriptors

KwdEn :
- Abscisic acid, Aquaporin, Expansion, Genetically modified organism, Growth, Hydraulic conductivity, Hydraulics, Plant ecology, Plant leaf, Process, Stomatal conductance, Water.

Abstract

Abscisic acid (ABA) affects plant metabolism and water transfers via multiple mechanisms at cell, organ and whole plant levels. These mechanisms translate into contradictory effects on leaf growth, so the literature reports positive, null or negative effects of ABA on leaf growth upon water deficit. We review evidences based on genetic manipulations of ABA biosynthesis, feeding the plant with artificial ABA or partial root drying and provide elements to avoid confusions of effects. We propose that ABA has mainly three effects on growth. (i) Via its controlling effect on stomatal aperture and transpiration rate, an increased concentration of ABA tends to buffer the day-night alternations of leaf growth rate and the negative effect of evaporative demand. (ii) ABA tends to improve leaf growth via an increase in the conductance to water transfer in the plant as a result of increased tissue hydraulic conductivity. (iii) ABA has also a modest non-hydraulic effect which is negative in plants subjected to water deficit, either manipulated for ABA synthesis or fed with artificial ABA, but can be positive in well watered plants deficient of ABA. The overall effect of increasing ABA biosynthesis depends on the relative weight of each of these effects under different environmental scenarios.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A14	`01`			`@1 INRA, UMR759 Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux, Place Viala @2 34060 Montpellier @3 FRA @Z 1 aut. @Z 3 aut.`
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C03	`05`	`X`	`SPA`	`@0 Expansión @5 05`
C03	`06`	`X`	`FRE`	`@0 Conductance stomatique @5 06`
C03	`06`	`X`	`ENG`	`@0 Stomatal conductance @5 06`
C03	`06`	`X`	`SPA`	`@0 Conductancia estomática @5 06`
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C03	`10`	`X`	`ENG`	`@0 Abscisic acid @2 NK @2 FF @5 15`
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Format Inist (serveur)

NO :	PASCAL 10-0150810 INIST
ET :	Control of leaf growth by abscisic acid: hydraulic or non-hydraulic processes?
AU :	TARDIEU (François); PARENT (Boris); SIMONNEAU (Thierry)
AF :	INRA, UMR759 Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux, Place Viala/34060 Montpellier/France (1 aut., 3 aut.); Australian Centre for Plant Functional Genomics, Waite Campus, The University of Adelaide, PMB1/Glen Osmond, SA 5064/Australie (2 aut.)
DT :	Publication en série; Niveau analytique
SO :	Plant, cell and environment : (Print); ISSN 0140-7791; Coden PLCEDV; Royaume-Uni; Da. 2010; Vol. 33; No. 4; Pp. 636-647; Bibl. 3 p.3/4
LA :	Anglais
EA :	Abscisic acid (ABA) affects plant metabolism and water transfers via multiple mechanisms at cell, organ and whole plant levels. These mechanisms translate into contradictory effects on leaf growth, so the literature reports positive, null or negative effects of ABA on leaf growth upon water deficit. We review evidences based on genetic manipulations of ABA biosynthesis, feeding the plant with artificial ABA or partial root drying and provide elements to avoid confusions of effects. We propose that ABA has mainly three effects on growth. (i) Via its controlling effect on stomatal aperture and transpiration rate, an increased concentration of ABA tends to buffer the day-night alternations of leaf growth rate and the negative effect of evaporative demand. (ii) ABA tends to improve leaf growth via an increase in the conductance to water transfer in the plant as a result of increased tissue hydraulic conductivity. (iii) ABA has also a modest non-hydraulic effect which is negative in plants subjected to water deficit, either manipulated for ABA synthesis or fed with artificial ABA, but can be positive in well watered plants deficient of ABA. The overall effect of increasing ABA biosynthesis depends on the relative weight of each of these effects under different environmental scenarios.
CC :	002A
FD :	Croissance; Feuille végétal; Hydraulique; Processus; Expansion; Conductance stomatique; Conductivité hydraulique; Aquaporine; Organisme génétiquement modifié; Acide abscissique; Eau; <<>>; Ecologie végétale
FG :	Sesquiterpène; Substance croissance végétal
ED :	Growth; Plant leaf; Hydraulics; Process; Expansion; Stomatal conductance; Hydraulic conductivity; Aquaporin; Genetically modified organism; Abscisic acid; Water; Plant ecology
EG :	Sesquiterpenes; Plant growth substance
SD :	Crecimiento; Hoja vegetal; Hidraúlica; Proceso; Expansión; Conductancia estomática; Conductividad hidráulica; Aquaporina; Organismo modificado genéticamente; Abscísico ácido; Agua; Ecología vegetal
LO :	INIST-17987.354000190109180140
ID :	10-0150810

Links to Exploration step

Pascal:10-0150810

Le document en format XML

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<server><NO>PASCAL 10-0150810 INIST</NO>
<ET>Control of leaf growth by abscisic acid: hydraulic or non-hydraulic processes?</ET>
<AU>TARDIEU (François); PARENT (Boris); SIMONNEAU (Thierry)</AU>
<AF>INRA, UMR759 Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux, Place Viala/34060 Montpellier/France (1 aut., 3 aut.); Australian Centre for Plant Functional Genomics, Waite Campus, The University of Adelaide, PMB1/Glen Osmond, SA 5064/Australie (2 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Plant, cell and environment : (Print); ISSN 0140-7791; Coden PLCEDV; Royaume-Uni; Da. 2010; Vol. 33; No. 4; Pp. 636-647; Bibl. 3 p.3/4</SO>
<LA>Anglais</LA>
<EA>Abscisic acid (ABA) affects plant metabolism and water transfers via multiple mechanisms at cell, organ and whole plant levels. These mechanisms translate into contradictory effects on leaf growth, so the literature reports positive, null or negative effects of ABA on leaf growth upon water deficit. We review evidences based on genetic manipulations of ABA biosynthesis, feeding the plant with artificial ABA or partial root drying and provide elements to avoid confusions of effects. We propose that ABA has mainly three effects on growth. (i) Via its controlling effect on stomatal aperture and transpiration rate, an increased concentration of ABA tends to buffer the day-night alternations of leaf growth rate and the negative effect of evaporative demand. (ii) ABA tends to improve leaf growth via an increase in the conductance to water transfer in the plant as a result of increased tissue hydraulic conductivity. (iii) ABA has also a modest non-hydraulic effect which is negative in plants subjected to water deficit, either manipulated for ABA synthesis or fed with artificial ABA, but can be positive in well watered plants deficient of ABA. The overall effect of increasing ABA biosynthesis depends on the relative weight of each of these effects under different environmental scenarios.</EA>
<CC>002A</CC>
<FD>Croissance; Feuille végétal; Hydraulique; Processus; Expansion; Conductance stomatique; Conductivité hydraulique; Aquaporine; Organisme génétiquement modifié; Acide abscissique; Eau; <<>>; Ecologie végétale</FD>
<FG>Sesquiterpène; Substance croissance végétal</FG>
<ED>Growth; Plant leaf; Hydraulics; Process; Expansion; Stomatal conductance; Hydraulic conductivity; Aquaporin; Genetically modified organism; Abscisic acid; Water; Plant ecology</ED>
<EG>Sesquiterpenes; Plant growth substance</EG>
<SD>Crecimiento; Hoja vegetal; Hidraúlica; Proceso; Expansión; Conductancia estomática; Conductividad hidráulica; Aquaporina; Organismo modificado genéticamente; Abscísico ácido; Agua; Ecología vegetal</SD>
<LO>INIST-17987.354000190109180140</LO>
<ID>10-0150810</ID>
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Control of leaf growth by abscisic acid: hydraulic or non-hydraulic processes?

Control of leaf growth by abscisic acid: hydraulic or non-hydraulic processes?

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