Salinity tolerance of 'Valencia' orange trees on rootstocks with contrasting salt tolerance is not improved by moderate shade
Identifieur interne : 000519 ( PascalFrancis/Corpus ); précédent : 000518; suivant : 000520Salinity tolerance of 'Valencia' orange trees on rootstocks with contrasting salt tolerance is not improved by moderate shade
Auteurs : F. Garcia-Sanchez ; J. P. Syvertsen ; V. Martinez ; J. C. MelgarSource :
- Journal of experimental botany [ 0022-0957 ] ; 2006.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
The effects of shading in combination with salinity treatments were studied in citrus trees on two rootstocks with contrasting salt tolerance to determine if shading could reduce the negative effects of salinity stress. Well-nourished 2-year-old 'Valencia' orange trees grafted on Cleopatra mandarin (Cleo, relatively salt tolerant) or Carrizo citrange (Carr, relatively salt sensitive), were grown either under a 50% shade cloth or left unshaded in full sunlight. Half the trees received no salinity treatment and half were salinized with 50 mM Cl- during two 9 week salinity periods in the spring and autumn interrupted by an 11 week rainy period. The shade treatment reduced midday leaf temperature and leaf-to-air vapour pressure deficit regardless of salinity treatments. In non-salinized trees, shade increased midday CO2 assimilation rate (ACO2) and stomatal conductance, but had no effect on leaf transpiration (EIf). Shade also increased leaf chlorophyll and photosynthetic water use efficiency (ACO2/EIf) in leaves on both rootstocks and increased total plant dry weight in Cleo. The salinity treatment reduced leaf growth and leaf gas exchange parameters. Shade decreased Cl- concentrations in leaves of salinized Carr trees, but had no effect on leaf or root Cl- of trees on Cleo. There were no significant differences in leaf gas exchange parameters of shaded and unshaded salinized plants but the growth reduction from salinity stress was actually greater for shaded than for unshaded trees. Shaded trees on both rootstocks had higher leaf Na+ than unshaded trees after the first salinity period, and this shade-induced elevated leaf Na+ persisted after the second salinity period in trees on Carr. Thus, shading did not alleviate the negative effects of salinity on growth and Na+ accumulation.
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Format Inist (serveur)
NO : | PASCAL 07-0026739 INIST |
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ET : | Salinity tolerance of 'Valencia' orange trees on rootstocks with contrasting salt tolerance is not improved by moderate shade |
AU : | GARCIA-SANCHEZ (F.); SYVERTSEN (J. P.); MARTINEZ (V.); MELGAR (J. C.) |
AF : | University of Florida, IFAS, Citrus Research and Education Center, 700 Experiment Station Road/Lake Alfred, FL 33850/Etats-Unis (1 aut., 2 aut.); Centro de Edafologia y Biologia Aplicada del Segura, CSIC, Campus Universitario de Espinardo/Espinardo, 30100 Murcia/Espagne (1 aut., 3 aut.); Universidad de Córdoba. Dpto. Agronomía, Apdo. 3048/14080 Córdoba/Espagne (4 aut.) |
DT : | Publication en série; Papier de recherche; Niveau analytique |
SO : | Journal of experimental botany; ISSN 0022-0957; Coden JEBOA6; Royaume-Uni; Da. 2006; Vol. 57; No. 14; Pp. 3697-3706; Bibl. 33 ref. |
LA : | Anglais |
EA : | The effects of shading in combination with salinity treatments were studied in citrus trees on two rootstocks with contrasting salt tolerance to determine if shading could reduce the negative effects of salinity stress. Well-nourished 2-year-old 'Valencia' orange trees grafted on Cleopatra mandarin (Cleo, relatively salt tolerant) or Carrizo citrange (Carr, relatively salt sensitive), were grown either under a 50% shade cloth or left unshaded in full sunlight. Half the trees received no salinity treatment and half were salinized with 50 mM Cl- during two 9 week salinity periods in the spring and autumn interrupted by an 11 week rainy period. The shade treatment reduced midday leaf temperature and leaf-to-air vapour pressure deficit regardless of salinity treatments. In non-salinized trees, shade increased midday CO2 assimilation rate (ACO2) and stomatal conductance, but had no effect on leaf transpiration (EIf). Shade also increased leaf chlorophyll and photosynthetic water use efficiency (ACO2/EIf) in leaves on both rootstocks and increased total plant dry weight in Cleo. The salinity treatment reduced leaf growth and leaf gas exchange parameters. Shade decreased Cl- concentrations in leaves of salinized Carr trees, but had no effect on leaf or root Cl- of trees on Cleo. There were no significant differences in leaf gas exchange parameters of shaded and unshaded salinized plants but the growth reduction from salinity stress was actually greater for shaded than for unshaded trees. Shaded trees on both rootstocks had higher leaf Na+ than unshaded trees after the first salinity period, and this shade-induced elevated leaf Na+ persisted after the second salinity period in trees on Carr. Thus, shading did not alleviate the negative effects of salinity on growth and Na+ accumulation. |
CC : | 002A32D03C |
FD : | Salinité; Tolérance; Assimilation; Conductance stomatique; Efficacité utilisation eau; Citrus sinensis; Carbone dioxyde |
FG : | Rutaceae; Dicotyledones; Angiospermae; Spermatophyta |
ED : | Salinity; Tolerance; Assimilation; Stomatal conductance; Water use efficiency; Citrus sinensis; Carbon dioxide |
EG : | Rutaceae; Dicotyledones; Angiospermae; Spermatophyta |
SD : | Salinidad; Tolerancia; Asimilación; Conductancia estomática; Eficacia utilización agua; Citrus sinensis; Carbono dióxido |
LO : | INIST-6923.354000159490440160 |
ID : | 07-0026739 |
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Pascal:07-0026739Le document en format XML
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Salinity tolerance of 'Valencia' orange trees on rootstocks with contrasting salt tolerance is not improved by moderate shade</title>
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<term>Assimilation</term>
<term>Conductance stomatique</term>
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<front><div type="abstract" xml:lang="en">The effects of shading in combination with salinity treatments were studied in citrus trees on two rootstocks with contrasting salt tolerance to determine if shading could reduce the negative effects of salinity stress. Well-nourished 2-year-old 'Valencia' orange trees grafted on Cleopatra mandarin (Cleo, relatively salt tolerant) or Carrizo citrange (Carr, relatively salt sensitive), were grown either under a 50% shade cloth or left unshaded in full sunlight. Half the trees received no salinity treatment and half were salinized with 50 mM Cl<sup>-</sup>
during two 9 week salinity periods in the spring and autumn interrupted by an 11 week rainy period. The shade treatment reduced midday leaf temperature and leaf-to-air vapour pressure deficit regardless of salinity treatments. In non-salinized trees, shade increased midday CO<sub>2</sub>
assimilation rate (A<sub>CO2</sub>
) and stomatal conductance, but had no effect on leaf transpiration (E<sub>If</sub>
). Shade also increased leaf chlorophyll and photosynthetic water use efficiency (A<sub>CO2</sub>
/E<sub>If</sub>
) in leaves on both rootstocks and increased total plant dry weight in Cleo. The salinity treatment reduced leaf growth and leaf gas exchange parameters. Shade decreased Cl<sup>-</sup>
concentrations in leaves of salinized Carr trees, but had no effect on leaf or root Cl<sup>-</sup>
of trees on Cleo. There were no significant differences in leaf gas exchange parameters of shaded and unshaded salinized plants but the growth reduction from salinity stress was actually greater for shaded than for unshaded trees. Shaded trees on both rootstocks had higher leaf Na<sup>+</sup>
than unshaded trees after the first salinity period, and this shade-induced elevated leaf Na<sup>+</sup>
persisted after the second salinity period in trees on Carr. Thus, shading did not alleviate the negative effects of salinity on growth and Na<sup>+</sup>
accumulation.</div>
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<fC01 i1="01" l="ENG"><s0>The effects of shading in combination with salinity treatments were studied in citrus trees on two rootstocks with contrasting salt tolerance to determine if shading could reduce the negative effects of salinity stress. Well-nourished 2-year-old 'Valencia' orange trees grafted on Cleopatra mandarin (Cleo, relatively salt tolerant) or Carrizo citrange (Carr, relatively salt sensitive), were grown either under a 50% shade cloth or left unshaded in full sunlight. Half the trees received no salinity treatment and half were salinized with 50 mM Cl<sup>-</sup>
during two 9 week salinity periods in the spring and autumn interrupted by an 11 week rainy period. The shade treatment reduced midday leaf temperature and leaf-to-air vapour pressure deficit regardless of salinity treatments. In non-salinized trees, shade increased midday CO<sub>2</sub>
assimilation rate (A<sub>CO2</sub>
) and stomatal conductance, but had no effect on leaf transpiration (E<sub>If</sub>
). Shade also increased leaf chlorophyll and photosynthetic water use efficiency (A<sub>CO2</sub>
/E<sub>If</sub>
) in leaves on both rootstocks and increased total plant dry weight in Cleo. The salinity treatment reduced leaf growth and leaf gas exchange parameters. Shade decreased Cl<sup>-</sup>
concentrations in leaves of salinized Carr trees, but had no effect on leaf or root Cl<sup>-</sup>
of trees on Cleo. There were no significant differences in leaf gas exchange parameters of shaded and unshaded salinized plants but the growth reduction from salinity stress was actually greater for shaded than for unshaded trees. Shaded trees on both rootstocks had higher leaf Na<sup>+</sup>
than unshaded trees after the first salinity period, and this shade-induced elevated leaf Na<sup>+</sup>
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<server><NO>PASCAL 07-0026739 INIST</NO>
<ET>Salinity tolerance of 'Valencia' orange trees on rootstocks with contrasting salt tolerance is not improved by moderate shade</ET>
<AU>GARCIA-SANCHEZ (F.); SYVERTSEN (J. P.); MARTINEZ (V.); MELGAR (J. C.)</AU>
<AF>University of Florida, IFAS, Citrus Research and Education Center, 700 Experiment Station Road/Lake Alfred, FL 33850/Etats-Unis (1 aut., 2 aut.); Centro de Edafologia y Biologia Aplicada del Segura, CSIC, Campus Universitario de Espinardo/Espinardo, 30100 Murcia/Espagne (1 aut., 3 aut.); Universidad de Córdoba. Dpto. Agronomía, Apdo. 3048/14080 Córdoba/Espagne (4 aut.)</AF>
<DT>Publication en série; Papier de recherche; Niveau analytique</DT>
<SO>Journal of experimental botany; ISSN 0022-0957; Coden JEBOA6; Royaume-Uni; Da. 2006; Vol. 57; No. 14; Pp. 3697-3706; Bibl. 33 ref.</SO>
<LA>Anglais</LA>
<EA>The effects of shading in combination with salinity treatments were studied in citrus trees on two rootstocks with contrasting salt tolerance to determine if shading could reduce the negative effects of salinity stress. Well-nourished 2-year-old 'Valencia' orange trees grafted on Cleopatra mandarin (Cleo, relatively salt tolerant) or Carrizo citrange (Carr, relatively salt sensitive), were grown either under a 50% shade cloth or left unshaded in full sunlight. Half the trees received no salinity treatment and half were salinized with 50 mM Cl<sup>-</sup>
during two 9 week salinity periods in the spring and autumn interrupted by an 11 week rainy period. The shade treatment reduced midday leaf temperature and leaf-to-air vapour pressure deficit regardless of salinity treatments. In non-salinized trees, shade increased midday CO<sub>2</sub>
assimilation rate (A<sub>CO2</sub>
) and stomatal conductance, but had no effect on leaf transpiration (E<sub>If</sub>
). Shade also increased leaf chlorophyll and photosynthetic water use efficiency (A<sub>CO2</sub>
/E<sub>If</sub>
) in leaves on both rootstocks and increased total plant dry weight in Cleo. The salinity treatment reduced leaf growth and leaf gas exchange parameters. Shade decreased Cl<sup>-</sup>
concentrations in leaves of salinized Carr trees, but had no effect on leaf or root Cl<sup>-</sup>
of trees on Cleo. There were no significant differences in leaf gas exchange parameters of shaded and unshaded salinized plants but the growth reduction from salinity stress was actually greater for shaded than for unshaded trees. Shaded trees on both rootstocks had higher leaf Na<sup>+</sup>
than unshaded trees after the first salinity period, and this shade-induced elevated leaf Na<sup>+</sup>
persisted after the second salinity period in trees on Carr. Thus, shading did not alleviate the negative effects of salinity on growth and Na<sup>+</sup>
accumulation.</EA>
<CC>002A32D03C</CC>
<FD>Salinité; Tolérance; Assimilation; Conductance stomatique; Efficacité utilisation eau; Citrus sinensis; Carbone dioxyde</FD>
<FG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta</FG>
<ED>Salinity; Tolerance; Assimilation; Stomatal conductance; Water use efficiency; Citrus sinensis; Carbon dioxide</ED>
<EG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta</EG>
<SD>Salinidad; Tolerancia; Asimilación; Conductancia estomática; Eficacia utilización agua; Citrus sinensis; Carbono dióxido</SD>
<LO>INIST-6923.354000159490440160</LO>
<ID>07-0026739</ID>
</server>
</inist>
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