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http://hdl.handle.net/2445/47207
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DC Field | Value | Language |
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dc.contributor.author | Aranjuelo Michelena, Iker | - |
dc.contributor.author | Cabrera i Bosquet, Llorenç | - |
dc.contributor.author | Morcuende, Rosa | - |
dc.contributor.author | Pérez, Pilar | - |
dc.contributor.author | Avice, Jean-Christophe | - |
dc.contributor.author | Nogués Mestres, Salvador | - |
dc.contributor.author | Araus Ortega, José Luis | - |
dc.contributor.author | Martínez Carrasco, Rafael | - |
dc.date.accessioned | 2013-10-22T13:47:29Z | - |
dc.date.available | 2013-10-22T13:47:29Z | - |
dc.date.issued | 2011 | - |
dc.identifier.issn | 0022-0957 | - |
dc.identifier.uri | http://hdl.handle.net/2445/47207 | - |
dc.description.abstract | Wheat plants (Triticum durum Desf., cv. Regallo) were grown in the field to study the effects of contrasting [CO2] 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 CO2. The ambient 13C/12C isotopic composition (δ13C) of air CO2 was changed from-10.2 in ambient [CO2] to-23.6 under elevated [CO2] between the 7th and the 14th days after anthesis in order to study C assimilation and partitioning between leaves and ears. Elevated [CO2] 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 [CO2] negatively affected Rubisco and Rubisco activase protein content and induced photosynthetic down-regulation. CO2 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 δ13C of ear total organic matter and respired CO2, soluble sugar δ13C revealed that a small amount of labelled C reached the ear. The 12CO2 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. | - |
dc.format.extent | 47 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Oxford University Press | - |
dc.relation.isformatof | Versió postprint del document publicat a: http://dx.doi.org/10.1093/jxb/err095 | - |
dc.relation.ispartof | Journal of Experimental Botany, 2011, vol. 62, num. 11, p. 3957-3969 | - |
dc.relation.uri | http://dx.doi.org/10.1093/jxb/err095 | - |
dc.rights | (c) Aranjuelo Michelena, Iker et al., 2011 | - |
dc.source | Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals) | - |
dc.subject.classification | Blat | - |
dc.subject.classification | Diòxid de carboni | - |
dc.subject.classification | Respiració de les plantes | - |
dc.subject.other | Wheat | - |
dc.subject.other | Carbon dioxide | - |
dc.subject.other | Plant respiration | - |
dc.title | Does ear C sink strength contributes to the overcoming of photosynthetic acclimation of wheat plants exposed to elevated CO2? | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 590751 | - |
dc.date.updated | 2013-10-22T13:47:29Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
dc.identifier.pmid | 21511906 | - |
Appears in Collections: | Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals) |
Files in This Item:
File | Description | Size | Format | |
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590751.pdf | 600.4 kB | Adobe PDF | View/Open |
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