Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations.
Abstract: Coffee (Coffea spp.), a globally traded commodity, is a slow-growing tropical tree species that displays an improved photosynthetic performance when grown under elevated atmospheric CO2 concentrations ([CO2]). To investigate the mechanisms underlying this response, two commercial coffee cultivars (Catuaí and Obatã) were grown using the first free-air CO2 enrichment (FACE) facility in Latin America. Measurements were conducted in two contrasting growth seasons, which were characterized by the high (February) and low (August) sink demand. Elevated [CO2] led to increases in net photosynthetic rates (A) in parallel with decreased photorespiration rates, with no photochemical limitations to A. The stimulation of A by elevated CO2 supply was more prominent in August (56% on average) than in February (40% on average). Overall, the stomatal and mesophyll conductances, as well as the leaf nitrogen and phosphorus concentrations, were unresponsive to the treatments. Photosynthesis was strongly limited by diffusional constraints, particularly at the stomata level, and this pattern was little, if at all, affected by elevated [CO2]. Relative to February, starch pools (but not soluble sugars) increased remarkably (>500%) in August, with no detectable alteration in the maximum carboxylation capacity estimated on a chloroplast [CO2] basis. Upregulation of A by elevated [CO2] took place with no signs of photosynthetic downregulation, even during the period of low sink demand, when acclimation would be expected to be greatest.
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Format: | Separatas biblioteca |
Language: | English eng |
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2016-01-25
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Subjects: | Coffea arabica L, Photosynthetic limitations, Photosynthetic acclimation, Startch., Café, Fotossíntese, Clima, Dióxido de carbono, Mudança Climática., Photosynthesis, Climate change, Carbon dioxide, carbohydrates, face, nitrogen, starch., |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1034947 |
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dig-alice-doc-10349472017-08-16T03:34:18Z Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations. DaMATTA, F. M. GODOY, A. G. MENEZES-SILVA, P. E. MARTINS, S. C. V. SANGLARD, L. M. V. P. MORAIS, L. E. TORRE-NETO, A. GHINI, R. FABIO MURILO DAMATTA, UFV; ALICE GONTIJO DE GODOY, UFV; PAULO EDUARDO DE MENEZES SILVA, UFV; SAMUEL CORDEIRO VITOR MARTINS, UFV; LILIAN MARIA VINCIS PEREIRA SANGLARD, UFV; LEANDRO ELIAS MORAIS, UFV; ANDRE TORRE NETO, CNPDIA; RAQUEL GHINI, CNPMA. Coffea arabica L Photosynthetic limitations Photosynthetic acclimation Startch. Café Fotossíntese Clima Dióxido de carbono Mudança Climática. Photosynthesis Climate change Carbon dioxide carbohydrates face nitrogen starch. Abstract: Coffee (Coffea spp.), a globally traded commodity, is a slow-growing tropical tree species that displays an improved photosynthetic performance when grown under elevated atmospheric CO2 concentrations ([CO2]). To investigate the mechanisms underlying this response, two commercial coffee cultivars (Catuaí and Obatã) were grown using the first free-air CO2 enrichment (FACE) facility in Latin America. Measurements were conducted in two contrasting growth seasons, which were characterized by the high (February) and low (August) sink demand. Elevated [CO2] led to increases in net photosynthetic rates (A) in parallel with decreased photorespiration rates, with no photochemical limitations to A. The stimulation of A by elevated CO2 supply was more prominent in August (56% on average) than in February (40% on average). Overall, the stomatal and mesophyll conductances, as well as the leaf nitrogen and phosphorus concentrations, were unresponsive to the treatments. Photosynthesis was strongly limited by diffusional constraints, particularly at the stomata level, and this pattern was little, if at all, affected by elevated [CO2]. Relative to February, starch pools (but not soluble sugars) increased remarkably (>500%) in August, with no detectable alteration in the maximum carboxylation capacity estimated on a chloroplast [CO2] basis. Upregulation of A by elevated [CO2] took place with no signs of photosynthetic downregulation, even during the period of low sink demand, when acclimation would be expected to be greatest. 2016-01-25T11:11:11Z 2016-01-25T11:11:11Z 2016-01-25 2016 2017-02-18T11:11:11Z Separatas Journal of Experimental Botany, London, v. 67, n. 1, p. 341-352, 2016. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1034947 en eng openAccess |
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Coffea arabica L Photosynthetic limitations Photosynthetic acclimation Startch. Café Fotossíntese Clima Dióxido de carbono Mudança Climática. Photosynthesis Climate change Carbon dioxide carbohydrates face nitrogen starch. Coffea arabica L Photosynthetic limitations Photosynthetic acclimation Startch. Café Fotossíntese Clima Dióxido de carbono Mudança Climática. Photosynthesis Climate change Carbon dioxide carbohydrates face nitrogen starch. |
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Coffea arabica L Photosynthetic limitations Photosynthetic acclimation Startch. Café Fotossíntese Clima Dióxido de carbono Mudança Climática. Photosynthesis Climate change Carbon dioxide carbohydrates face nitrogen starch. Coffea arabica L Photosynthetic limitations Photosynthetic acclimation Startch. Café Fotossíntese Clima Dióxido de carbono Mudança Climática. Photosynthesis Climate change Carbon dioxide carbohydrates face nitrogen starch. DaMATTA, F. M. GODOY, A. G. MENEZES-SILVA, P. E. MARTINS, S. C. V. SANGLARD, L. M. V. P. MORAIS, L. E. TORRE-NETO, A. GHINI, R. Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations. |
description |
Abstract: Coffee (Coffea spp.), a globally traded commodity, is a slow-growing tropical tree species that displays an improved photosynthetic performance when grown under elevated atmospheric CO2 concentrations ([CO2]). To investigate the mechanisms underlying this response, two commercial coffee cultivars (Catuaí and Obatã) were grown using the first free-air CO2 enrichment (FACE) facility in Latin America. Measurements were conducted in two contrasting growth seasons, which were characterized by the high (February) and low (August) sink demand. Elevated [CO2] led to increases in net photosynthetic rates (A) in parallel with decreased photorespiration rates, with no photochemical limitations to A. The stimulation of A by elevated CO2 supply was more prominent in August (56% on average) than in February (40% on average). Overall, the stomatal and mesophyll conductances, as well as the leaf nitrogen and phosphorus concentrations, were unresponsive to the treatments. Photosynthesis was strongly limited by diffusional constraints, particularly at the stomata level, and this pattern was little, if at all, affected by elevated [CO2]. Relative to February, starch pools (but not soluble sugars) increased remarkably (>500%) in August, with no detectable alteration in the maximum carboxylation capacity estimated on a chloroplast [CO2] basis. Upregulation of A by elevated [CO2] took place with no signs of photosynthetic downregulation, even during the period of low sink demand, when acclimation would be expected to be greatest. |
author2 |
FABIO MURILO DAMATTA, UFV; ALICE GONTIJO DE GODOY, UFV; PAULO EDUARDO DE MENEZES SILVA, UFV; SAMUEL CORDEIRO VITOR MARTINS, UFV; LILIAN MARIA VINCIS PEREIRA SANGLARD, UFV; LEANDRO ELIAS MORAIS, UFV; ANDRE TORRE NETO, CNPDIA; RAQUEL GHINI, CNPMA. |
author_facet |
FABIO MURILO DAMATTA, UFV; ALICE GONTIJO DE GODOY, UFV; PAULO EDUARDO DE MENEZES SILVA, UFV; SAMUEL CORDEIRO VITOR MARTINS, UFV; LILIAN MARIA VINCIS PEREIRA SANGLARD, UFV; LEANDRO ELIAS MORAIS, UFV; ANDRE TORRE NETO, CNPDIA; RAQUEL GHINI, CNPMA. DaMATTA, F. M. GODOY, A. G. MENEZES-SILVA, P. E. MARTINS, S. C. V. SANGLARD, L. M. V. P. MORAIS, L. E. TORRE-NETO, A. GHINI, R. |
format |
Separatas |
topic_facet |
Coffea arabica L Photosynthetic limitations Photosynthetic acclimation Startch. Café Fotossíntese Clima Dióxido de carbono Mudança Climática. Photosynthesis Climate change Carbon dioxide carbohydrates face nitrogen starch. |
author |
DaMATTA, F. M. GODOY, A. G. MENEZES-SILVA, P. E. MARTINS, S. C. V. SANGLARD, L. M. V. P. MORAIS, L. E. TORRE-NETO, A. GHINI, R. |
author_sort |
DaMATTA, F. M. |
title |
Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations. |
title_short |
Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations. |
title_full |
Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations. |
title_fullStr |
Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations. |
title_full_unstemmed |
Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations. |
title_sort |
sustained enhancement of photosynthesis in coffee trees grown under free-air co2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations. |
publishDate |
2016-01-25 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1034947 |
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