SciELO - Scientific Electronic Library Online

 
vol.31 issue2Path analysis in multicollinearity for fruit traits of pepperGrain yield of nine quinoa genotypes (Chenopodium quinoa Willd.) grown in Mediterranean environments differing in water availability author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Idesia (Arica)

On-line version ISSN 0718-3429

Abstract

TEIXEIRA DO AMARAL, José Augusto; BRAGA RENA, Alemar; TEIXEIRA CORDEIRO, Antonio  and  ROMAIS SCHMILDT, Edilson. Effects of aluminum, nitrate and ammonium on the growth, potassium content and composition of amino acids in Stylosanthes. Idesia [online]. 2013, vol.31, n.2, pp.61-68. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292013000200009.

The effects of the aluminum, nitrate and ammonium interaction, in nutritive solution, were studied under controlled conditions. An analysis was performed on the growth, potassium concentrations, and percentage composition of N of the amino acids in Stylosanthes guianensis and S. macrocephala, sensitive and resistant, respectively, both to aluminum and to ammonium. The ammonium nutrition reduced the growth of the S. guianensis drastically. The ammonium toxicity, verified only in the S. guianensis, was associated to the stimulation of the metabolic routes syntheses of proline and arginine, starting from the glutamic acid, to the detriment of the glutamine synthesis. The aluminum partially alleviated the ammonium toxicity in the S. guianensis, increasing the asparagine retention and reducing the arginine composition in the root system. In the presence of the nitric source, the aluminum increased the potassium concentrations only in the S. macrocephala. In the presence of nitric source, the interconversion of N-aminic was influenced by aluminum in both species, however the percentage composition of N-amino acids was more modified in the S. macrocephala.

Keywords : aluminum toxicity; ammonium toxicity; aluminum tolerance.

        · abstract in Spanish     · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License