A - Papers appearing in refereed journals
Hawkesford, M. J. and Zhao, F-J. 2007. Strategies for increasing the selenium content of wheat. Journal of Cereal Science. 46 (3), pp. 282-292.
|Authors||Hawkesford, M. J. and Zhao, F-J.|
Selenium (Se) is essential for humans and animals but has no known function in plants. Excess accumulation is toxic to both plants and animals. Dietary intake of Se is low in a large number of people worldwide. This is due to low bioavailability of Se in some soils and consequently low concentrations of Se in plant tissues.
Both selenate and selenite are taken up by plants and subsequently translocated around the plant. Selenate, an analogue of sulphate, is transported by the sulphate transporter family. Some plants are able to accumulate high internal concentrations of Se (hyperaccumulators); however, genetic variation in accumulation ability amongst non-accumulators such as cereals, is relatively small.
Within plant tissues, Se enters the pathways for sulphate assimilation and metabolism and will replace cysteine and methionine in proteins, often with detrimental effect. Alternatively, Se may be accumulated as methylated derivatives or lost from the plant following volatilisation.
Agronomic biofortification of crops with Se-containing fertilisers, which is practised in some countries, provides the best short-term solution for improving Se content of wheat. Longer-term genetic improvement, particularly by targeting substrate discrimination of transporters between selenate and sulphate, for example, may provide a means to enhance uptake and promote accumulation.
|Year of Publication||2007|
|Journal||Journal of Cereal Science|
|Journal citation||46 (3), pp. 282-292|
|Digital Object Identifier (DOI)||doi:10.1016/j.jcs.2007.02.006|
|Open access||Published as non-open access|
|Funder||Biotechnology and Biological Sciences Research Council|
|Funder project or code||SEF|
|Centre for Crop Genetic Improvement (CGI)|
|Biofortification of wheat with selenium to increase human dietary intake BAGELS|
|Soil protection and remediation by chemical and biological approaches|
|Regulation of sulphate transporter gene expression and sulphur metabolism in cereals, source-sink interactions and sulphur supply to grain tissues|
|Online||21 Mar 2007|
|Publication process dates|
|Accepted||28 Feb 2007|
|Publisher||Academic Press Ltd- Elsevier Science Ltd|
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