Gas exchange rates at different vapor pressure deficits and water relations of 'Pera' sweet orange plants with citrus variegated chlorosis (CVC)
Identifieur interne : 000739 ( PascalFrancis/Corpus ); précédent : 000738; suivant : 000740Gas exchange rates at different vapor pressure deficits and water relations of 'Pera' sweet orange plants with citrus variegated chlorosis (CVC)
Auteurs : Gustavo Habermann ; Eduardo Caruso Machado ; Joao Domingos Rodrigues ; Camilo Lazaro MedinaSource :
- Scientia horticulturae [ 0304-4238 ] ; 2003.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Net photosynthesis (A) and transpiration rates (E), stomatal conductance (g), water use efficiency (WUE), intrinsic water use efficiency (IWUE) and internal leaf CO2 concentration (Ci) in response to different vapor pressure deficit (1.2 and 2.5 kPa) were investigated in 'Pera' sweet orange plants affected by citrus variegated chlorosis (CVC), a disease caused by Xylella fastidiosa. All plants were well watered and leaf water potential (Ψw) was also measured by the psychrometric technique. Results showed that healthy plants responded to higher vapor pressure deficit (VPD), lowering its net photosynthesis and transpiration rates, and stomatal conductance. However, diseased plants presented no clear response to VPD, showing lower A, E and g for both VPDs studied and very similar values to these variables in healthy plants at the highest VPD. Internal leaf CO2 concentration also decreased for healthy plants when under the highest VPD, and surprisingly, the same pattern of response was found in plants with CVC. These results, the lower Ψw and higher WUE values for diseased plants, indicated that this disease may cause stomatal dysfunction and affect the water resistance through xylem vessels, which ultimately may play some role in photosynthetic metabolism.
Notice en format standard (ISO 2709)
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Format Inist (serveur)
NO : | PASCAL 03-0427396 INIST |
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ET : | Gas exchange rates at different vapor pressure deficits and water relations of 'Pera' sweet orange plants with citrus variegated chlorosis (CVC) |
AU : | HABERMANN (Gustavo); CARUSO MACHADO (Eduardo); DOMINGOS RODRIGUES (Joao); LAZARO MEDINA (Camilo) |
AF : | Departamento de Botânica, Instituto de Biociências, Universidade Estadual Paulista (UNESP), CP 510/18618-000 Botucatu, SP/Brésil (1 aut., 3 aut.); Instituto Agronõmico de Campinas (IAC), Centro de Ecofisiologia e Biofísica/13001-970 Campinas, SP/Brésil (2 aut.); Departamento de Fisiologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), CP 6109/13083-970 Campinas, SP/Brésil (4 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Scientia horticulturae; ISSN 0304-4238; Coden SHRTAH; Pays-Bas; Da. 2003; Vol. 98; No. 3; Pp. 233-245; Bibl. 1 p.3/4 |
LA : | Anglais |
EA : | Net photosynthesis (A) and transpiration rates (E), stomatal conductance (g), water use efficiency (WUE), intrinsic water use efficiency (IWUE) and internal leaf CO2 concentration (Ci) in response to different vapor pressure deficit (1.2 and 2.5 kPa) were investigated in 'Pera' sweet orange plants affected by citrus variegated chlorosis (CVC), a disease caused by Xylella fastidiosa. All plants were well watered and leaf water potential (Ψw) was also measured by the psychrometric technique. Results showed that healthy plants responded to higher vapor pressure deficit (VPD), lowering its net photosynthesis and transpiration rates, and stomatal conductance. However, diseased plants presented no clear response to VPD, showing lower A, E and g for both VPDs studied and very similar values to these variables in healthy plants at the highest VPD. Internal leaf CO2 concentration also decreased for healthy plants when under the highest VPD, and surprisingly, the same pattern of response was found in plants with CVC. These results, the lower Ψw and higher WUE values for diseased plants, indicated that this disease may cause stomatal dysfunction and affect the water resistance through xylem vessels, which ultimately may play some role in photosynthetic metabolism. |
CC : | 002A34F03 |
FD : | Echange gazeux; Pression vapeur; Régime hydrique; Bactériose; Chlorose; Efficacité utilisation eau; Citrus sinensis; Xylella fastidiosa |
FG : | Infection; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Agrume; Arbre fruitier; Phytopathogène; Bactérie |
ED : | Gas exchange; Vapor pressure; Water regime; Bacteriosis; Chlorosis; Water use efficiency; Citrus sinensis |
EG : | Infection; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Citrus fruit; Fruit tree; Plant pathogen; Bacteria |
SD : | Intercambio gaseoso; Presión vapor; Régimen hídrico; Bacteriosis; Clorosis; Eficacia utilización agua; Citrus sinensis |
LO : | INIST-16233.354000111013010040 |
ID : | 03-0427396 |
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Pascal:03-0427396Le document en format XML
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<term>Water regime</term>
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<front><div type="abstract" xml:lang="en">Net photosynthesis (A) and transpiration rates (E), stomatal conductance (g), water use efficiency (WUE), intrinsic water use efficiency (IWUE) and internal leaf CO<sub>2</sub>
concentration (C<sub>i</sub>
) in response to different vapor pressure deficit (1.2 and 2.5 kPa) were investigated in 'Pera' sweet orange plants affected by citrus variegated chlorosis (CVC), a disease caused by Xylella fastidiosa. All plants were well watered and leaf water potential (Ψ<sub>w</sub>
) was also measured by the psychrometric technique. Results showed that healthy plants responded to higher vapor pressure deficit (VPD), lowering its net photosynthesis and transpiration rates, and stomatal conductance. However, diseased plants presented no clear response to VPD, showing lower A, E and g for both VPDs studied and very similar values to these variables in healthy plants at the highest VPD. Internal leaf CO<sub>2</sub>
concentration also decreased for healthy plants when under the highest VPD, and surprisingly, the same pattern of response was found in plants with CVC. These results, the lower Ψ<sub>w</sub>
and higher WUE values for diseased plants, indicated that this disease may cause stomatal dysfunction and affect the water resistance through xylem vessels, which ultimately may play some role in photosynthetic metabolism.</div>
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<server><NO>PASCAL 03-0427396 INIST</NO>
<ET>Gas exchange rates at different vapor pressure deficits and water relations of 'Pera' sweet orange plants with citrus variegated chlorosis (CVC)</ET>
<AU>HABERMANN (Gustavo); CARUSO MACHADO (Eduardo); DOMINGOS RODRIGUES (Joao); LAZARO MEDINA (Camilo)</AU>
<AF>Departamento de Botânica, Instituto de Biociências, Universidade Estadual Paulista (UNESP), CP 510/18618-000 Botucatu, SP/Brésil (1 aut., 3 aut.); Instituto Agronõmico de Campinas (IAC), Centro de Ecofisiologia e Biofísica/13001-970 Campinas, SP/Brésil (2 aut.); Departamento de Fisiologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), CP 6109/13083-970 Campinas, SP/Brésil (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Scientia horticulturae; ISSN 0304-4238; Coden SHRTAH; Pays-Bas; Da. 2003; Vol. 98; No. 3; Pp. 233-245; Bibl. 1 p.3/4</SO>
<LA>Anglais</LA>
<EA>Net photosynthesis (A) and transpiration rates (E), stomatal conductance (g), water use efficiency (WUE), intrinsic water use efficiency (IWUE) and internal leaf CO<sub>2</sub>
concentration (C<sub>i</sub>
) in response to different vapor pressure deficit (1.2 and 2.5 kPa) were investigated in 'Pera' sweet orange plants affected by citrus variegated chlorosis (CVC), a disease caused by Xylella fastidiosa. All plants were well watered and leaf water potential (Ψ<sub>w</sub>
) was also measured by the psychrometric technique. Results showed that healthy plants responded to higher vapor pressure deficit (VPD), lowering its net photosynthesis and transpiration rates, and stomatal conductance. However, diseased plants presented no clear response to VPD, showing lower A, E and g for both VPDs studied and very similar values to these variables in healthy plants at the highest VPD. Internal leaf CO<sub>2</sub>
concentration also decreased for healthy plants when under the highest VPD, and surprisingly, the same pattern of response was found in plants with CVC. These results, the lower Ψ<sub>w</sub>
and higher WUE values for diseased plants, indicated that this disease may cause stomatal dysfunction and affect the water resistance through xylem vessels, which ultimately may play some role in photosynthetic metabolism.</EA>
<CC>002A34F03</CC>
<FD>Echange gazeux; Pression vapeur; Régime hydrique; Bactériose; Chlorose; Efficacité utilisation eau; Citrus sinensis; Xylella fastidiosa</FD>
<FG>Infection; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Agrume; Arbre fruitier; Phytopathogène; Bactérie</FG>
<ED>Gas exchange; Vapor pressure; Water regime; Bacteriosis; Chlorosis; Water use efficiency; Citrus sinensis</ED>
<EG>Infection; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Citrus fruit; Fruit tree; Plant pathogen; Bacteria</EG>
<SD>Intercambio gaseoso; Presión vapor; Régimen hídrico; Bacteriosis; Clorosis; Eficacia utilización agua; Citrus sinensis</SD>
<LO>INIST-16233.354000111013010040</LO>
<ID>03-0427396</ID>
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