High hexokinase activity in tomato fruit perturbs carbon and energy metabolism and reduces fruit and seed size
| Autor: | Bérénice Ricard, David Granot, Nir Dai, Thierry Menu, Pierre H. Saglio, Philippe Raymond |
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| Přispěvatelé: | Station de physiologie végétale, Institut National de la Recherche Agronomique (INRA), Agricultural Research Organization |
| Rok vydání: | 2004 |
| Předmět: |
ARABIDOPSIS HEXOKINASE 1
Sucrose SUREXPRESSION Physiology Starch Plant Science HEXOKINASE Lycopersicon chemistry.chemical_compound Botany Hexose [SDV.EE]Life Sciences [q-bio]/Ecology environment chemistry.chemical_classification Hexokinase biology FRUIT METABOLISME ENERGETIQUE food and beverages BIOLOGIE Carbohydrate biology.organism_classification CARBONE Horticulture chemistry Shoot DEVELOPPEMENT DU FRUIT Solanaceae |
| Zdroj: | Plant, Cell and Environment Plant, Cell and Environment, Wiley, 2004, 27 (1), pp.89-98. ⟨10.1046/j.0016-8025.2003.01128.x⟩ |
| ISSN: | 1365-3040 0140-7791 |
| DOI: | 10.1046/j.0016-8025.2003.01128.x |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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