Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2?

Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2?

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13 p., 3 tables, 6 figures and bibliography

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Main Authors: Aranjuelo, Iker, Cabrera-Bosquet, Llorenç, Morcuende, Rosa, Avice, Jean Christophe, Nogués, Salvador, Araus, José Luis, Martínez-Carrasco, Rafael, Pérez Pérez, Pilar
Format: artículo biblioteca
Language:English
Published: Oxford University Press 2011-07
Subjects:C management, Elevated CO2, Photosynthetic acclimation, Proteomic characterization, Rubisco, Stable isotopes,
Online Access:http://hdl.handle.net/10261/49163
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spelling dig-irnasa-es-10261-491632022-06-01T13:10:10Z Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2? Aranjuelo, Iker Cabrera-Bosquet, Llorenç Morcuende, Rosa Avice, Jean Christophe Nogués, Salvador Araus, José Luis Martínez-Carrasco, Rafael Pérez Pérez, Pilar C management Elevated CO2 Photosynthetic acclimation Proteomic characterization Rubisco Stable isotopes 13 p., 3 tables, 6 figures and bibliography Wheat plants (Triticum durum Desf., cv. Regallo) were grown in the field to study the effects of contrasting [CO 2] conditions (700 versus 370 μmol mol -1) on growth, photosynthetic performance, and C management during the post-anthesis period. The aim was to test whether a restricted capacity of sink organs to utilize photosynthates drives a loss of photosynthetic capacity in elevated CO 2. The ambient 13C/ 12C isotopic composition (δ 13C) of air CO 2 was changed from-10.2‰ in ambient [CO 2] to-23.6‰ under elevated [CO 2] between the 7th and the 14th days after anthesis in order to study C assimilation and partitioning between leaves and ears. Elevated [CO 2] had no significant effect on biomass production and grain filling, and caused an accumulation of C compounds in leaves. This was accompanied by up-regulation of phosphoglycerate mutase and ATP synthase protein content, together with down-regulation of adenosine diphosphate glucose pyrophosphatase protein. Growth in elevated [CO 2] negatively affected Rubisco and Rubisco activase protein content and induced photosynthetic down-regulation. CO 2 enrichment caused a specific decrease in Rubisco content, together with decreases in the amino acid and total N content of leaves. The C labelling revealed that in flag leaves, part of the C fixed during grain filling was stored as starch and structural C compounds whereas the rest of the labelled C (mainly in the form of soluble sugars) was completely respired 48 h after the end of labelling. Although labelled C was not detected in the δ 13C of ear total organic matter and respired CO 2, soluble sugar δ 13C revealed that a small amount of labelled C reached the ear. The 12CO 2 labelling suggests that during the beginning of post-anthesis the ear did not contribute towards overcoming flag leaf carbohydrate accumulation, and this had a consequent effect on protein expression and photosynthetic acclimation. This work has been funded by the Spanish National Research and Development Programme–European Regional Development Fund ERDF (Projects AGL2009-13539-C02-01, AGL2006- 13541-C02–02, and CGL2009-13079-C02-02). Peer reviewed 2012-05-03T11:52:44Z 2012-05-03T11:52:44Z 2011-07 artículo http://purl.org/coar/resource_type/c_6501 Journal of Experimental Botany 62(11): 3957-3969 (2011) 0022-0957 http://hdl.handle.net/10261/49163 10.1093/jxb/err095 1460-2431 21511906 en http://dx.doi.org/10.1093/jxb/err095 open Oxford University Press
institution IRNASA ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-irnasa-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del IRNASA España
language English
topic C management
Elevated CO2
Photosynthetic acclimation
Proteomic characterization
Rubisco
Stable isotopes
C management
Elevated CO2
Photosynthetic acclimation
Proteomic characterization
Rubisco
Stable isotopes
spellingShingle C management
Elevated CO2
Photosynthetic acclimation
Proteomic characterization
Rubisco
Stable isotopes
C management
Elevated CO2
Photosynthetic acclimation
Proteomic characterization
Rubisco
Stable isotopes
Aranjuelo, Iker
Cabrera-Bosquet, Llorenç
Morcuende, Rosa
Avice, Jean Christophe
Nogués, Salvador
Araus, José Luis
Martínez-Carrasco, Rafael
Pérez Pérez, Pilar
Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2?
description 13 p., 3 tables, 6 figures and bibliography
format artículo
topic_facet C management
Elevated CO2
Photosynthetic acclimation
Proteomic characterization
Rubisco
Stable isotopes
author Aranjuelo, Iker
Cabrera-Bosquet, Llorenç
Morcuende, Rosa
Avice, Jean Christophe
Nogués, Salvador
Araus, José Luis
Martínez-Carrasco, Rafael
Pérez Pérez, Pilar
author_facet Aranjuelo, Iker
Cabrera-Bosquet, Llorenç
Morcuende, Rosa
Avice, Jean Christophe
Nogués, Salvador
Araus, José Luis
Martínez-Carrasco, Rafael
Pérez Pérez, Pilar
author_sort Aranjuelo, Iker
title Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2?
title_short Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2?
title_full Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2?
title_fullStr Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2?
title_full_unstemmed Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2?
title_sort does ear c sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated co2?
publisher Oxford University Press
publishDate 2011-07
url http://hdl.handle.net/10261/49163
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