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Menu, T., UMR 619 Physiol. et Biotech. Veg., Inst. de Biol. Veg. Molec., INRA de Bordeaux, BP 81, F-33883 Villenave d'Ornon Cedex, France
Saglio, P., UMR 619 Physiol. et Biotech. Veg., Inst. de Biol. Veg. Molec., INRA de Bordeaux, BP 81, F-33883 Villenave d'Ornon Cedex, France
Granot, D., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Dai, N., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Raymond, P., UMR 619 Physiol. et Biotech. Veg., Inst. de Biol. Veg. Molec., INRA de Bordeaux, BP 81, F-33883 Villenave d'Ornon Cedex, France
Ricard, B., UMR 619 Physiol. et Biotech. Veg., Inst. de Biol. Veg. Molec., INRA de Bordeaux, BP 81, F-33883 Villenave d'Ornon Cedex, France
Tomato (Lycopersicon esculentum var MP-1) plants overexpressing Arabidopsis hexokinase 1 (AtHXK1) exhibited high hexokinase (HXK) activity in correlation with drastic phenotypic modifications in fruit. Transgenic fruit and seeds were reduced in size. Reduction in fruit size was due to decreased cell expansion, which could not be corrected by perfusion with sucrose (Suc). Neither could wild type (WT) fruit and seed size be obtained by grafting of transgenic flowers onto WT shoots. Starch and hexose contents were lower but organic and amino acids were higher in transgenic fruit. Lower respiratory rates measured in vitro accompanied by even lower ATP levels and ATP/ADP ratios indicated metabolic perturbations that may explain, in part, reduced fruit and seed size.
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High hexokinase activity in tomato fruit perturbs carbon and energy metabolism and reduces fruit and seed size
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Menu, T., UMR 619 Physiol. et Biotech. Veg., Inst. de Biol. Veg. Molec., INRA de Bordeaux, BP 81, F-33883 Villenave d'Ornon Cedex, France
Saglio, P., UMR 619 Physiol. et Biotech. Veg., Inst. de Biol. Veg. Molec., INRA de Bordeaux, BP 81, F-33883 Villenave d'Ornon Cedex, France
Granot, D., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Dai, N., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Raymond, P., UMR 619 Physiol. et Biotech. Veg., Inst. de Biol. Veg. Molec., INRA de Bordeaux, BP 81, F-33883 Villenave d'Ornon Cedex, France
Ricard, B., UMR 619 Physiol. et Biotech. Veg., Inst. de Biol. Veg. Molec., INRA de Bordeaux, BP 81, F-33883 Villenave d'Ornon Cedex, France
High hexokinase activity in tomato fruit perturbs carbon and energy metabolism and reduces fruit and seed size
Tomato (Lycopersicon esculentum var MP-1) plants overexpressing Arabidopsis hexokinase 1 (AtHXK1) exhibited high hexokinase (HXK) activity in correlation with drastic phenotypic modifications in fruit. Transgenic fruit and seeds were reduced in size. Reduction in fruit size was due to decreased cell expansion, which could not be corrected by perfusion with sucrose (Suc). Neither could wild type (WT) fruit and seed size be obtained by grafting of transgenic flowers onto WT shoots. Starch and hexose contents were lower but organic and amino acids were higher in transgenic fruit. Lower respiratory rates measured in vitro accompanied by even lower ATP levels and ATP/ADP ratios indicated metabolic perturbations that may explain, in part, reduced fruit and seed size.
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