English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/37467
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Carboxylate metabolism in sugar beet plants grown with excess Zn

AuthorsSagardoy Calderón, Ruth CSIC; Morales Iribas, Fermín CSIC ORCID; Rellán-Álvarez, Rubén CSIC ORCID; Abadía Bayona, Anunciación CSIC ORCID ; Abadía Bayona, Javier CSIC ORCID ; López-Millán, Ana Flor CSIC
KeywordsHeavy metal toxicity
Carboxylate metabolism
Sugar beet
Zn toxicity
Issue DateMay-2011
CitationSagardoy R, Morales F, Rellán-Álvarez R, Abadía A, Abadía J, López-Millán AF. Carboxylate metabolism in sugar beet plants grown with excess Zn. Journal of plant physiology 168 (7): 730-733 (2011)
AbstractThe effects of Zn excess on carboxylate metabolism were investigated in sugar beet (Beta vulgaris L.) plants grown hydroponically in a growth chamber. Root extracts of plants grown with 50 or 100 M Zn in the nutrient solution showed increases in several enzymatic activities related to organic acid metabolism, including citrate synthase and phosphoenolpyruvate carboxylase, when compared to activities in control root extracts. Root citric and malic acid concentrations increased in plants grown with 100 M Zn, but not in plants grown with 50 M Zn. In the xylem sap, plants grown with 50 and 100 M Zn showed increases in the concentrations of citrate and malate compared to the controls. Leaves of plants grown with 50 or 100 MZn showed increases in the concentrations of citric and malic acid and in the activities of citrate synthase and fumarase. Leaf isocitrate dehydrogenase increased only in plants grown with 50 M Zn when compared to the controls. In plants grown with 300 M Zn, the only enzyme showing activity increases in root extracts was citrate synthase, whereas the activities of other enzymes decreased compared to the controls, and root citrate concentrations increased. In the 300 MZn-grown plants, the xylem concentrations of citric and malic acids were higher than those of controls, whereas in leaf extracts the activity of fumarase increased markedly, and the leaf citric acid concentration was higher than in the controls. Based on our data, a metabolic model of the carboxylate metabolism in sugar beet plants grown under Zn excess is proposed.
Description4 Pag., 2 Tabl., 1 Fig. The definitive version is available at: http://www.sciencedirect.com/science/journal/01761617
Publisher version (URL)http://dx.doi.org/10.1016/j.jplph.2010.10.012
Appears in Collections:(EEAD) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.