Effects of prolonged elevated temperature on leaf gas exchange and other leaf traits in young olive trees

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Despite the economic importance of long-lived crop species in the Mediterranean Basin and their expansion to new warmer regions, their potential responses to prolonged temperature increases have not been adequately addressed. The objectives of this study were to: (i) assess leaf gas exchange respons...

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Detalles Bibliográficos
Otros Autores: Miserere, Andrea, Rousseaux, María Cecilia, Ploschuk, Edmundo Leonardo, Brizuela, María Magdalena, Curcio, Matías Hernán, Zabaleta, Romina, Searles, Peter Stoughton
Formato: Artículo
Lenguaje:Inglés
Materias:
OLEA EUROPAEA
OPEN TOP CHAMBER
PHOTOSYNTHESIS
STOMATAL CONDUCTANCE
THERMAL ACCLIMATION
WATER USE EFFICIENCY
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2021miserere.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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024 |a 10.1093/treephys/tpaa118 
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245 1 |a Effects of prolonged elevated temperature on leaf gas exchange and other leaf traits in young olive trees 
520 |a Despite the economic importance of long-lived crop species in the Mediterranean Basin and their expansion to new warmer regions, their potential responses to prolonged temperature increases have not been adequately addressed. The objectives of this study were to: (i) assess leaf gas exchange responses to prolonged elevated temperature in young olive trees; (ii) evaluate some additional leaf traits such as stomatal density and size under these same conditions; and (iii) determine whether photosynthetic acclimation to temperature was apparent. A field experiment with two temperature levels was conducted using well-irrigated, potted olive trees (cvs. Arbequina, Coratina) grown in open-top chambers during the summer and early fall in two growing seasons. The temperature levels were a near-ambient control (T0) and a heated (T+) treatment (+4 ◦C). Maximum photosynthetic rate (Amax), stomatal conductance (gs), transpiration (E) and chlorophyll fluorescence were measured. Stomatal size and density and trichome density were also determined. The Amax, gs and chlorophyll fluorescence were little affected by heating. However, leaf E was higher at T+ than T0 in the summer in both seasons due in large part to the moderate increase in vapor pressure deficit that accompanied heating, and consequently water-use efficiency was reduced in heated leaves. When reciprocal temperature measurements were conducted in mid-summer of the second season, Amax values of T0 and T+ leaves were higher under the temperature level at which they grew than when measured at the other temperature level, which suggests some thermal acclimation. Stomatal size and density were greater in T+ than in T0 grown leaves in some cases, which was consistent with a greater E in T+ leaves when measured at both temperature levels. These results suggest that acclimation to long-term changes in temperature must be carefully considered to help determine how olive trees will be influenced by global warming. 
653 |a OLEA EUROPAEA 
653 |a OPEN TOP CHAMBER 
653 |a PHOTOSYNTHESIS 
653 |a STOMATAL CONDUCTANCE 
653 |a THERMAL ACCLIMATION 
653 |a WATER USE EFFICIENCY 
700 1 |a Miserere, Andrea  |u Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR - Provincia de La Rioja - UNLaR-SEGEMAR-UNCa-CONICET), Anillaco, La Rioja, Argentina.  |u Universidad Nacional de La Rioja. Departamento de Ciencias y Tecnologías Aplicadas (DACTAPAyU). La Rioja, Argentina.  |9 69546 
700 1 |a Rousseaux, María Cecilia  |u Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR - Provincia de La Rioja - UNLaR-SEGEMAR-UNCa-CONICET), Anillaco, La Rioja, Argentina.  |u Universidad Nacional de La Rioja. Departamento de Ciencias Exactas, Físicas y Naturales (DACEFyN). La Rioja, Argentina.  |9 7428 
700 1 |a Ploschuk, Edmundo Leonardo  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales. Buenos Aires, Argentina.  |9 6393 
700 1 |a Brizuela, María Magdalena  |u Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR - Provincia de La Rioja - UNLaR-SEGEMAR-UNCa-CONICET), Anillaco, La Rioja, Argentina.  |u Universidad Nacional de La Rioja. Departamento de Ciencias Exactas, Físicas y Naturales (DACEFyN). La Rioja, Argentina.  |9 70020 
700 1 |9 38385  |a Curcio, Matías Hernán  |u Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR - Provincia de La Rioja - UNLaR-SEGEMAR-UNCa-CONICET), Anillaco, La Rioja, Argentina. 
700 1 |a Zabaleta, Romina  |u Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR - Provincia de La Rioja - UNLaR-SEGEMAR-UNCa-CONICET), Anillaco, La Rioja, Argentina.  |9 73825 
700 1 |a Searles, Peter Stoughton  |u Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR - Provincia de La Rioja - UNLaR-SEGEMAR-UNCa-CONICET), Anillaco, La Rioja, Argentina.  |9 38386 
773 0 |t Tree physiology  |g Vol.41, no.2 (2021), p.254-268, grafs., tbls.  |w SECS000978 
856 |f 2021miserere  |i en reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2021miserere.pdf  |x ARTI202206 
856 |u https://academic.oup.com/  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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