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  Malate Plays a Crucial Role in Starch Metabolism, Ripening, and Soluble Solid Content of Tomato Fruit and Affects Postharvest Softening

Centeno, D. C., Osorio, S., Nunes-Nesi, A., Bertolo, A. L. F., Carneiro, R. T., Araujo, W. L., et al. (2011). Malate Plays a Crucial Role in Starch Metabolism, Ripening, and Soluble Solid Content of Tomato Fruit and Affects Postharvest Softening. The Plant Cell, 23(1), 162-184. doi:10.1105/tpc.109.072231.

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Centeno-2011-Malate Plays a Cruci.pdf (beliebiger Volltext), 2MB
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Centeno, D. C.1, Autor           
Osorio, S.1, Autor           
Nunes-Nesi, A.1, Autor           
Bertolo, A. L. F.2, Autor
Carneiro, R. T.2, Autor
Araujo, W. L.1, Autor           
Steinhauser, M.-C.3, Autor           
Michalska, J.3, Autor           
Rohrmann, J.1, Autor           
Geigenberger, P.4, Autor           
Oliver, S. N.4, Autor           
Stitt, M.3, Autor           
Carrari, F.1, Autor           
Rose, J. K. C.2, Autor
Fernie, A. R.1, Autor           
Affiliations:
1Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              
2External Organizations, ou_persistent22              
3System Regulation, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753327              
4Storage Carbohydrate Metabolism, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753336              

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Schlagwörter: adp-glucose pyrophosphorylase growing potato-tubers adenosine 5'-diphosphoglucose pyrophosphorylase cell-wall metabolism gene-expression carotenoid biosynthesis carbohydrate-metabolism catalytic-properties solanum-tuberosum malic enzyme
 Zusammenfassung: Despite the fact that the organic acid content of a fruit is regarded as one of its most commercially important quality traits when assessed by the consumer, relatively little is known concerning the physiological importance of organic acid metabolism for the fruit itself. Here, we evaluate the effect of modifying malate metabolism in a fruit-specific manner, by reduction of the activities of either mitochondrial malate dehydrogenase or fumarase, via targeted antisense approaches in tomato (Solanum lycopersicum). While these genetic perturbations had relatively little effect on the total fruit yield, they had dramatic consequences for fruit metabolism, as well as unanticipated changes in postharvest shelf life and susceptibility to bacterial infection. Detailed characterization suggested that the rate of ripening was essentially unaltered but that lines containing higher malate were characterized by lower levels of transitory starch and a lower soluble sugars content at harvest, whereas those with lower malate contained higher levels of these carbohydrates. Analysis of the activation state of ADP-glucose pyrophosphorylase revealed that it correlated with the accumulation of transitory starch. Taken together with the altered activation state of the plastidial malate dehydrogenase and the modified pigment biosynthesis of the transgenic lines, these results suggest that the phenotypes are due to an altered cellular redox status. The combined data reveal the importance of malate metabolism in tomato fruit metabolism and development and confirm the importance of transitory starch in the determination of agronomic yield in this species.

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Sprache(n): eng - English
 Datum: 2011-01-142011
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: ISI: ISI:000287860300015
DOI: 10.1105/tpc.109.072231
ISSN: 1040-4651
URI: ://000287860300015http://www.plantcell.org/content/23/1/162.full.pdf
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Titel: The Plant Cell
  Kurztitel : Plant C
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Rockville : American Society of Plant Physiologists
Seiten: - Band / Heft: 23 (1) Artikelnummer: - Start- / Endseite: 162 - 184 Identifikator: Anderer: 1532-298X
CoNE: https://pure.mpg.de/cone/journals/resource/1532-298X