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A note on the effectiveness of selenium supplementation of Irish-grown Allium crops.
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2014
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ijafr_53 p91-99.pdf
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K. Reilly, J. Valverde, L. Finn, M. Gaffney, D.K. Rai and N. Brunton. A note on the effectiveness of selenium supplementation of Irish-grown Allium crops. Irish Journal of Agricultural and Food Research, 2014, 53, 91–99
Abstract
Onions and other Allium crops contain high levels of dietary phenolics and, unlike
many other crops, accumulate the beneficial mineral selenium. Selenium-enhanced
Allium crops are of interest both from a public good perspective and as a market
positioning strategy for growers. Field trials were carried out to i) identify onion and
scallion varieties that contain high levels of health-promoting phenolic and flavonoid
compounds as potential targets for selenium supplementation and ii) investigate selenium
supplementation in the widely-grown commercial onion variety ‘Hyskin’ at different
application rates of nitrogen fertilizer. Levels of selenium in onion bulbs were
significantly increased from 0.5–5.9 μg/g dry weight (DW) to 40.6–70.0 μg/g DW.