Send to

Choose Destination
Food Chem. 2017 Oct 15;233:492-499. doi: 10.1016/j.foodchem.2017.04.144. Epub 2017 Apr 25.

Modelling of the effect of selenium fertilization on the content of bioactive compounds in broccoli heads.

Author information

Departamento de Ingeniería Química, Universidad de Santiago de Chile, Avenida Libertador Bernardo O'Higgins 3363, Estación Central, Santiago 9170019, Chile. Electronic address:


Selenium (Se) exerts many effects beneficial to health. Broccoli is a Se-hyperaccumulator plant, with Se-fertilization increasing its potential as a functional food. We studied the effect of dose, and the developmental stage at the beginning of Se-fortification, on antioxidant capacity, phenolics, glucosinolates, sulphoraphane, Se-methyl selenocysteine and myrosinase in broccoli. Se-fortification decreased the antioxidant properties and sulphur-containing compounds, but increased Se-methyl-selenocysteine content. Regression models gave r>0.77 confirming that Se dose and developmental stage largely determine the behaviour of the system. Correlation models gave r>0.95, allowing estimation of saturation concentration of Se-methyl-selenocysteine in broccoli cv. Traditional (3.13µmolg-1DM) and the concentration (2-mmol sodium selenate) above which the content of phenolic compounds decreases significantly. Sulphoraphane and glucosinolates' dependence on total Se supply was consistent with myrosinase activity below 3.5-mmol sodium selenate. Our results would enable design of optimal fertilization strategies to enrich broccoli in Se with minimal impairment of antioxidants properties.


Antioxidant capacity; Modelling; Myrosinase-glucosinolate system; Phenolic compounds; Se-methyl selenocysteine; Selenium

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center