%0 Journal Article %1 citeulike:9646482 %A Aranjuelo, Iker %A Cabrera-Bosquet, Llorenc %A Morcuende, Rosa %A Avice, Jean Christophe C. %A Nogués, Salvador %A Araus, José Luis L. %A Mart\'ınez-Carrasco, Rafael %A Pérez, Pilar %D 2011 %I Oxford University Press %J Journal of experimental botany %K citeulikeExport co2, face, nutrient, wheat, wue %N 11 %P 3957--3969 %R 10.1093/jxb/err095 %T Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2? %U http://dx.doi.org/10.1093/jxb/err095 %V 62 %X 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 (13)C/(12)C isotopic composition (δ(13)C) 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(13)C of ear total organic matter and respired CO(2), soluble sugar δ(13)C revealed that a small amount of labelled C reached the ear. The (12)CO(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.

@article{citeulike:9646482, abstract = {{ 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 (13)C/(12)C isotopic composition (δ(13)C) 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(13)C of ear total organic matter and respired CO(2), soluble sugar δ(13)C revealed that a small amount of labelled C reached the ear. The (12)CO(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. }}, added-at = {2019-03-31T01:14:40.000+0100}, author = {Aranjuelo, Iker and Cabrera-Bosquet, Lloren\c{c} and Morcuende, Rosa and Avice, Jean Christophe C. and Nogu\'{e}s, Salvador and Araus, Jos\'{e} Luis L. and Mart\'{\i}nez-Carrasco, Rafael and P\'{e}rez, Pilar}, biburl = {https://www.bibsonomy.org/bibtex/24f3faae6f7a30c322a0bcaefff6d37e9/dianella}, citeulike-article-id = {9646482}, citeulike-linkout-0 = {http://dx.doi.org/10.1093/jxb/err095}, citeulike-linkout-1 = {http://www.ingentaconnect.com/content/oup/exbotj/2011/00000062/00000011/art00022}, citeulike-linkout-2 = {http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3134354/}, citeulike-linkout-3 = {http://view.ncbi.nlm.nih.gov/pubmed/21511906}, citeulike-linkout-4 = {http://www.hubmed.org/display.cgi?uids=21511906}, doi = {10.1093/jxb/err095}, interhash = {13b3959b65bbd8adbccf8fbe44e16496}, intrahash = {4f3faae6f7a30c322a0bcaefff6d37e9}, issn = {1460-2431}, journal = {Journal of experimental botany}, keywords = {citeulikeExport co2, face, nutrient, wheat, wue}, month = jul, number = 11, pages = {3957--3969}, pmcid = {PMC3134354}, pmid = {21511906}, posted-at = {2013-12-19 05:30:00}, priority = {2}, publisher = {Oxford University Press}, timestamp = {2019-03-31T01:16:26.000+0100}, title = {{Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2?}}, url = {http://dx.doi.org/10.1093/jxb/err095}, volume = 62, year = 2011 }