Radiotracing selenium in bread-wheat seeds for a Se-biofortification program: an optimization study in seed enrichment

C. Galinha; M. Freitas; A. Pacheco; J. Coutinho; B. Maçãs; A. Almeida

doi:10.1007/s10967-011-1262-0

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 291: Issue 1

Radiotracing selenium in bread-wheat seeds for a Se-biofortification program: an optimization study in seed enrichment

Authors:

C. Galinha

C. Galinha

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M. Freitas

M. Freitas URSN-ITN, Instituto Tecnológico e Nuclear, Estrada Nacional 10, 2686-953 Sacavém, Portugal

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A. Pacheco

A. Pacheco CERENA-IST, Technical University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal

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J. Coutinho

J. Coutinho INRB/INIA-Elvas, National Institute of Biological Resources, Estrada de Gil Vaz, 7350-228 Elvas, Portugal

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B. Maçãs

B. Maçãs INRB/INIA-Elvas, National Institute of Biological Resources, Estrada de Gil Vaz, 7350-228 Elvas, Portugal

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A. Almeida

A. Almeida INRB/INIA-Elvas, National Institute of Biological Resources, Estrada de Gil Vaz, 7350-228 Elvas, Portugal

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Pages:: 193–195

Online Publication Date:: 25 Jun 2011

Publication Date:: 01 Jan 2012

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-011-1262-0

Keywords:: Bread wheat; Cereal biofortification; Radiotracing techniques; Seed enrichment; Selenium supplementation; 75Se radiotracer

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Abstract

Selenium (Se) is an essential micronutrient for human health, but its deficiency may affect at least one billion people worldwide. Plants and plant-derived products transfer the soil-uptaken Se to humans through the food chain, which is hardly enough when soils have been always poor or already exhausted in bioavailable Se species. Other than agronomic approaches for enhancing Se levels in cereals, such as soil and foliar supplements, seed enrichment may be viewed as an alternative Se-biofortification technique. This study addresses the protocol for preparing Se-enriched wheat seeds, with the specific purpose of optimizing the administration of Se to the seeds prior to sowing. The first step was to soak an amount of bread-wheat seeds in an active Se solution, made with irradiated [Na₂O₄Se], and then monitoring ⁷⁵Se in periodically-retrieved samples from that original amount. To avoid losing Se to soil (after sowing), and, especially, to ensure that Se gets really absorbed into the seeds—and not just adsorbed onto them—the washing time of the seeds should be optimized as well. This was carried out by washing Se-treated seeds several times, until no significant amount of the radiotracer could be detected in the washing water. In what concerns the full optimization procedure, the overall results of the present study point to an optimum time of 48 h for soaking and 24 h for washing.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)