caa a22 4500 397521030 CHVBK 20180308164632.0 cr unu---uuuuu 161202e199509 xx s 000 0 eng 10.1093/jxb/46.special_issue.1335 doi (NATIONALLICENCE)oxford-10.1093/jxb/46.special_issue.1335 Effects of light and atmospheric carbon dioxide enrichment on photosynthesis and carbon partitioning in the leaves of tomato (Lycopersicon esculentum L.) plants over-expressing sucrose phosphate synthase [Elektronische Daten] [Nathalie Galtier, Christine H. Foyer, Erik Murchie, Rhu Aired, Paul Quick, Toni A. Voelker, Catherine Thépenier, Gerard Lascève, Thomas Betsche] Photosynthetic carbon assimilation, carbon partitioning and foliar carbon budgets were measured in the leaves of transformed tomato plants expressing a maize sucrose-phosphate synthase (SPS) gene in addition to the native enzyme, and in untransformed controls. The maize SPS gene was expressed under control of either the promoter of the small subunit of ribulose 1,5-bisphosphate carboxylase (rbcS promoter; lines 2, 9 and 18) or the 35S promoter from cauliflower mosaic virus (CaMV promoter; line 13). The rate of sucrose synthesis was increased relative to that of starch and sucrose/starch ratios were higher throughout the photoperiod in the leaves of all plants expressing high SPS activity. The leaf carbon budget over the day/night cycle in air at low irradiance (180μmol photon m−2 s−1) was similar in all plants. Net photosynthesis measured in air and at elevated CO2 (800-1500 μl l−1) on whole plants grown in air at 400μmol m−2 s−1 irradiance was significantly increased in the high SPS expressors compared to the untransformed controls and was highest where SPS activity was greatest. At high CO2 the stimulation of photosynthesis was more pronounced. We conclude that SPS activity is a major point of control of photosynthesis particularly under saturating light and CO2. © 1995 Oxford University Press Sucrose Synthesis nationallicence Photosynthesis nationallicence carbon partitioning nationallicence sucrose phosphate synthase nationallicence tomato nationallicence photorespiration nationallicence carbon/nitrogen (C/N) ratios nationallicence Galtier Nathalie Laboratoire du Métabolisme, INRA Versailles, France aut Foyer Christine H. Environmental Biology Department, Institute of Grassland and Environmental Research Plas Gogerddan, Dyfed, Aberystwyth, UK aut Murchie Erik Laboratoire du Métabolisme, INRA Versailles, France aut Aired Rhu Department of Animal and Plant Sciences, University of Sheffield Box 601, Sheffield S10 2UQ, UK aut Quick Paul Department of Animal and Plant Sciences, University of Sheffield Box 601, Sheffield S10 2UQ, UK aut Voelker Toni A. Calgene Ine 1920 Fifth Street, Davis, CA 95616, USA aut Thépenier Catherine Département de Physiologie Végétale et Ecosystèmes, Section de Bioénergétique Cellulaire, Centre de Cadarache Saint-Paul-lez-Durance, France aut Lascève Gerard Département de Physiologie Végétale et Ecosystèmes, Section de Bioénergétique Cellulaire, Centre de Cadarache Saint-Paul-lez-Durance, France aut Betsche Thomas Federal Centre for Cereal, Potato and Lipid Research PO Box 1354, D-32703 Detmold, Germany aut Journal of Experimental Botany Oxford University Press 46/special_issue(1995-09), 1335-1344 0022-0957 46:special_issue<1335 1995 46 exbotj https://doi.org/10.1093/jxb/46.special_issue.1335 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/jxb/46.special_issue.1335 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Galtier Nathalie Laboratoire du Métabolisme, INRA Versailles, France aut NATIONALLICENCE 700 1- Foyer Christine H. Environmental Biology Department, Institute of Grassland and Environmental Research Plas Gogerddan, Dyfed, Aberystwyth, UK aut NATIONALLICENCE 700 1- Murchie Erik Laboratoire du Métabolisme, INRA Versailles, France aut NATIONALLICENCE 700 1- Aired Rhu Department of Animal and Plant Sciences, University of Sheffield Box 601, Sheffield S10 2UQ, UK aut NATIONALLICENCE 700 1- Quick Paul Department of Animal and Plant Sciences, University of Sheffield Box 601, Sheffield S10 2UQ, UK aut NATIONALLICENCE 700 1- Voelker Toni A. Calgene Ine 1920 Fifth Street, Davis, CA 95616, USA aut NATIONALLICENCE 700 1- Thépenier Catherine Département de Physiologie Végétale et Ecosystèmes, Section de Bioénergétique Cellulaire, Centre de Cadarache Saint-Paul-lez-Durance, France aut NATIONALLICENCE 700 1- Lascève Gerard Département de Physiologie Végétale et Ecosystèmes, Section de Bioénergétique Cellulaire, Centre de Cadarache Saint-Paul-lez-Durance, France aut NATIONALLICENCE 700 1- Betsche Thomas Federal Centre for Cereal, Potato and Lipid Research PO Box 1354, D-32703 Detmold, Germany aut NATIONALLICENCE 773 0- Journal of Experimental Botany Oxford University Press 46/special_issue(1995-09), 1335-1344 0022-0957 46:special_issue<1335 1995 46 exbotj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford