Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/38521
metadata.artigo.dc.title: Physiological and biochemical impacts of magnesium-deficiency in two cultivars of coffee
metadata.artigo.dc.creator: Silva, Dayane Meireles da
Brandão, Isabel Rodrigues
Alves, Jose Donizeti
Santos, Meline Oliveira de
Souza, Kamila Rezende Dázio de
Silveira, Helbert Rezende Oliveira de
metadata.artigo.dc.publisher: Springer
metadata.artigo.dc.date.issued: 2014
metadata.artigo.dc.identifier.citation: SILVA, D. M. da et al. Physiological and biochemical impacts of magnesium-deficiency in two cultivars of coffee. Plant and Soil, [S.l.], v. 382, p. 133-150, 2014.
metadata.artigo.dc.description.abstract: Aim To evaluate biochemical and physiological impacts of magnesium-deficiency on seedlings of two cultivars (Catuaí and Acaiá) of Coffea arabica L.. Methods Six month old seedlings from both cultivars were transferred to plastic receptacles containing solutions with different concentrations of magnesium (Mg). Fully expanded leaves and roots were evaluated at the beginning of treatment and after 10, 20 and 30 days for chlorophyll and carotenoid content, biomass allocation, partitioning of carbohydrates and antioxidant metabolism. Results Mg-deficiency was characterized by an increase in the shoot/root dry weight ratio, which may be related to accumulation of carbohydrates in leaves. This accumulation is probably responsible for triggering a reduction in the consumption of reducing equivalents, providing favorable conditions for the formation of reactive oxygen species (ROS). The increase in ROS production was accompanied by increases in ascorbate concentration and enzyme activity of the antioxidant metabolism. Conclusions The Catuaí cultivar is more sensitive to Mg-deficiency than the Acaiá cultivar. When exposed to magnesium deficiency the Catuaí cultivar had reduced growth and its antioxidant metabolism was less efficient at removing ROS.
metadata.artigo.dc.identifier.uri: https://link.springer.com/article/10.1007/s11104-014-2150-5
http://repositorio.ufla.br/jspui/handle/1/38521
metadata.artigo.dc.language: en_US
Appears in Collections:DBI - Artigos publicados em periódicos

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