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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
Fecha : |
21/02/2014 |
Actualizado : |
08/10/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
SYVERTSEN, J.P.; GOÑI, C.; OTERO, A. |
Afiliación : |
J. P. SYVERTSEN, University of Florida, United States; CARMEN TERESITA GOÑI ALTUNA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ALVARO RICARDO OTERO CAMA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Fruit load and canopy shading affect leaf characteristics and net gas exchange of 'Spring' navel orange trees. |
Fecha de publicación : |
2003 |
Fuente / Imprenta : |
Tree Physiology, September 2003, Volume 23, Issue 13, Pages 899-906. OPEN ACCESS. |
ISSN : |
0829-318X |
DOI : |
10.1093/treephys/23.13.899 |
Idioma : |
Inglés |
Notas : |
Article history: Received December 11, 2002 / Accepted March 8, 2003 / Published online August 1, 2003. |
Contenido : |
ABSTRACT.
Five-year-old 'Spring' navel (Citrus sinensis (L.) Osbeck) orange trees were completely defruited, 50% defruited or left fully laden to study effects of fruit load on concentrations of nitrogen (N) and carbohydrate, net assimilation of CO2 (Ac) and stomatal conductance (g s) of mature leaves on clear winter days just before fruit harvest. Leaves on defruited trees were larger, had higher starch concentrations and greater leaf dry mass per area (LDMa) than leaves on fruited trees. Both Ac and gs were more than 40% lower in sunlit leaves on defruited trees than in sunlit leaves on trees with fruit. Leaves immediately adjacent to fruit were smaller, had lower leaf nitrogen and carbohydrate concentrations, lower LDMa and lower Ac than leaves on non-fruiting branches of the same trees. Removing half the crop increased individual fruit mass, but reduced fruit color development. Half the trees were shaded with 50% shade cloth for 4 months before harvest to determine the effects of lower leaf temperature (T1) and leaf-to-air vapor pressure difference on leaf responses. On relatively warm days when sunlit T1 > 25°C, shade increased Ac and gs, but had no effect on the ratio of internal to ambient CO2 (C i/Ca) concentration in leaves, implying that high mesophyll temperatures in sunlit leaves were more important than gs in limiting Ac. Sunlit leaves were more photoinhibited than shaded leaves on cooler days when T1 < 25°C. Shade decreased total soluble sugar concentrations in leaves, but had no effect on leaf starch concentrations. Shading had no effects on canopy volume, yield or fruit size, but shaded fruit developed better external color than sun-exposed fruit. Overall, the presence of a normal fruit crop resulted in lower foliar carbohydrate concentrations and higher Ac compared with defruited trees, except on warm days when Ac was reduced by high leaf temperatures.
Copyright © 2003, Oxford University Press MenosABSTRACT.
Five-year-old 'Spring' navel (Citrus sinensis (L.) Osbeck) orange trees were completely defruited, 50% defruited or left fully laden to study effects of fruit load on concentrations of nitrogen (N) and carbohydrate, net assimilation of CO2 (Ac) and stomatal conductance (g s) of mature leaves on clear winter days just before fruit harvest. Leaves on defruited trees were larger, had higher starch concentrations and greater leaf dry mass per area (LDMa) than leaves on fruited trees. Both Ac and gs were more than 40% lower in sunlit leaves on defruited trees than in sunlit leaves on trees with fruit. Leaves immediately adjacent to fruit were smaller, had lower leaf nitrogen and carbohydrate concentrations, lower LDMa and lower Ac than leaves on non-fruiting branches of the same trees. Removing half the crop increased individual fruit mass, but reduced fruit color development. Half the trees were shaded with 50% shade cloth for 4 months before harvest to determine the effects of lower leaf temperature (T1) and leaf-to-air vapor pressure difference on leaf responses. On relatively warm days when sunlit T1 > 25°C, shade increased Ac and gs, but had no effect on the ratio of internal to ambient CO2 (C i/Ca) concentration in leaves, implying that high mesophyll temperatures in sunlit leaves were more important than gs in limiting Ac. Sunlit leaves were more photoinhibited than shaded leaves on cooler days when T1 < 25°C. Shade decreased total soluble sugar concentrations in... Presentar Todo |
Palabras claves : |
Carbohydrates; Chlorophyll fluorescence; Leaf CO2 assimilation; LVPD; Photoinhibition; Soluble sugars; Starch; Stomatal conductance. |
Asunto categoría : |
F01 Cultivo |
Marc : |
LEADER 02885naa a2200277 a 4500 001 1012763 005 2019-10-08 008 2003 bl uuuu u00u1 u #d 022 $a0829-318X 024 7 $a10.1093/treephys/23.13.899$2DOI 100 1 $aSYVERTSEN, J.P. 245 $aFruit load and canopy shading affect leaf characteristics and net gas exchange of 'Spring' navel orange trees.$h[electronic resource] 260 $c2003 500 $aArticle history: Received December 11, 2002 / Accepted March 8, 2003 / Published online August 1, 2003. 520 $aABSTRACT. Five-year-old 'Spring' navel (Citrus sinensis (L.) Osbeck) orange trees were completely defruited, 50% defruited or left fully laden to study effects of fruit load on concentrations of nitrogen (N) and carbohydrate, net assimilation of CO2 (Ac) and stomatal conductance (g s) of mature leaves on clear winter days just before fruit harvest. Leaves on defruited trees were larger, had higher starch concentrations and greater leaf dry mass per area (LDMa) than leaves on fruited trees. Both Ac and gs were more than 40% lower in sunlit leaves on defruited trees than in sunlit leaves on trees with fruit. Leaves immediately adjacent to fruit were smaller, had lower leaf nitrogen and carbohydrate concentrations, lower LDMa and lower Ac than leaves on non-fruiting branches of the same trees. Removing half the crop increased individual fruit mass, but reduced fruit color development. Half the trees were shaded with 50% shade cloth for 4 months before harvest to determine the effects of lower leaf temperature (T1) and leaf-to-air vapor pressure difference on leaf responses. On relatively warm days when sunlit T1 > 25°C, shade increased Ac and gs, but had no effect on the ratio of internal to ambient CO2 (C i/Ca) concentration in leaves, implying that high mesophyll temperatures in sunlit leaves were more important than gs in limiting Ac. Sunlit leaves were more photoinhibited than shaded leaves on cooler days when T1 < 25°C. Shade decreased total soluble sugar concentrations in leaves, but had no effect on leaf starch concentrations. Shading had no effects on canopy volume, yield or fruit size, but shaded fruit developed better external color than sun-exposed fruit. Overall, the presence of a normal fruit crop resulted in lower foliar carbohydrate concentrations and higher Ac compared with defruited trees, except on warm days when Ac was reduced by high leaf temperatures. Copyright © 2003, Oxford University Press 653 $aCarbohydrates 653 $aChlorophyll fluorescence 653 $aLeaf CO2 assimilation 653 $aLVPD 653 $aPhotoinhibition 653 $aSoluble sugars 653 $aStarch 653 $aStomatal conductance 700 1 $aGOÑI, C. 700 1 $aOTERO, A. 773 $tTree Physiology, September 2003, Volume 23, Issue 13, Pages 899-906. OPEN ACCESS.
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
Fecha actual : |
21/02/2014 |
Actualizado : |
18/03/2022 |
Tipo de producción científica : |
Documentos |
Autor : |
GARCIA, F.; IBÁÑEZ, F.; PAULLIER, J.; ZOPPOLO, R. |
Afiliación : |
FELIPE LUIS GARCIA OLASO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FACUNDO IBÁÑEZ SILVA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JORGE ARTURO PAULLIER SUAREZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ROBERTO JOSE ZOPPOLO GOLDSCHMIDT, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Ensayo preliminar sobre el efecto de extracto de paraíso en la abundancia y daño de dos coleópteros plaga. |
Complemento del título : |
Jornada de divulgación, 30 setiembre 2008, INIA Las Brujas. |
Fecha de publicación : |
2008 |
Fuente / Imprenta : |
ln: INIA Las Brujas; Programa Nacional Producción Familiar; Programa Nacional Producción y Sustentabilidad Ambiental. Avances de resultados en producción orgánica. Jornada de divulgación. Canelones (UY): INIA, 2008. |
Páginas : |
p. 27-32. |
Serie : |
(INIA Serie Actividades de Difusión; 551) |
Idioma : |
Español |
Palabras claves : |
BIOPESTICIDAS; PARAISO; SAN ANTONIO VERDE; VAQUILLA DEL ZAPALLO. |
Thesagro : |
CONTROL BIOLOGICO; CONTROL DE INSECTOS; CONTROL DE PLAGAS; CULTIVOS; EXTRACTOS DE MELIA; EXTRACTOS VEGETALES; HORTALIZAS CUCURBITACEAS; METODOS DE CONTROL; PLAGUICIDAS; PLAGUICIDAS DE ORIGEN VEGETAL; PROTECCION DE LAS PLANTAS. |
Asunto categoría : |
H01 Protección de plantas - Aspectos generales |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/11400/1/sad-551-p.27-32.pdf
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Marc : |
LEADER 01221naa a2200349 a 4500 001 1008764 005 2022-03-18 008 2008 bl uuuu u00u1 u #d 100 1 $aGARCIA, F. 245 $aEnsayo preliminar sobre el efecto de extracto de paraíso en la abundancia y daño de dos coleópteros plaga. 260 $c2008 300 $ap. 27-32. 490 $a(INIA Serie Actividades de Difusión; 551) 650 $aCONTROL BIOLOGICO 650 $aCONTROL DE INSECTOS 650 $aCONTROL DE PLAGAS 650 $aCULTIVOS 650 $aEXTRACTOS DE MELIA 650 $aEXTRACTOS VEGETALES 650 $aHORTALIZAS CUCURBITACEAS 650 $aMETODOS DE CONTROL 650 $aPLAGUICIDAS 650 $aPLAGUICIDAS DE ORIGEN VEGETAL 650 $aPROTECCION DE LAS PLANTAS 653 $aBIOPESTICIDAS 653 $aPARAISO 653 $aSAN ANTONIO VERDE 653 $aVAQUILLA DEL ZAPALLO 700 1 $aIBÁÑEZ, F. 700 1 $aPAULLIER, J. 700 1 $aZOPPOLO, R. 773 $tln: INIA Las Brujas; Programa Nacional Producción Familiar; Programa Nacional Producción y Sustentabilidad Ambiental. Avances de resultados en producción orgánica. Jornada de divulgación. Canelones (UY): INIA, 2008.
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