White, Philip J., Bowen, Helen C., Marshall, B. (Bruce) and Broadley, Martin R. (2007) Extraordinarily high leaf selenium to sulfur ratios define ‘se-accumulator’ plants. Annals of Botany, Vol.100 (No.1). pp. 111-118. doi:10.1093/aob/mcm084 ISSN 0305-7364.

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Abstract

Background and Aims: Selenium (Se) and sulfur (S) exhibit similar chemical properties. In flowering plants (angiosperms) selenate and sulfate are acquired and assimilated by common transport and metabolic pathways. It is hypothesized that most angiosperm species show little or no discrimination in the accumulation of Se and S in leaves when their roots are supplied a mixture of selenate and sulfate, but some, termed Se-accumulator plants, selectively accumulate Se in preference to S under these conditions.

Methods: This paper surveys Se and S accumulation in leaves of 39 angiosperm species, chosen to represent the range of plant Se accumulation phenotypes, grown hydroponically under identical conditions.

Results: The data show that, when supplied a mixture of selenate and sulfate: (1) plant species differ in both their leaf Se ([Se]leaf) and leaf S ([S]leaf) concentrations; (2) most angiosperms show little discrimination for the accumulation of Se and S in their leaves and, in non-accumulator plants, [Se]leaf and [S]leaf are highly correlated; (3) [Se]leaf in Se-accumulator plants is significantly greater than in other angiosperms, but [S]leaf, although high, is within the range expected for angiosperms in general; and (4) the Se/S quotient in leaves of Se-accumulator plants is significantly higher than in leaves of other angiosperms.

Conclusion: The traits of extraordinarily high [Se]leaf and leaf Se/S quotients define the distinct elemental composition of Se-accumulator plants.

Item Type:	Journal Article
Subjects:	S Agriculture > SB Plant culture
Divisions:	Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Warwick HRI (2004-2010)
Library of Congress Subject Headings (LCSH):	Angiosperms, Astragalus (Plants), Brassica, Plants -- Assimilation, Selenium in agriculture, Sulfur in agriculture
Journal or Publication Title:	Annals of Botany
Publisher:	Oxford University Press
ISSN:	0305-7364
Official Date:	July 2007
Dates:	Date Event July 2007 Published
Volume:	Vol.100
Number:	No.1
Page Range:	pp. 111-118
DOI:	10.1093/aob/mcm084
Status:	Peer Reviewed
Access rights to Published version:	Open Access (Creative Commons)
Funder:	Biotechnology and Biological Sciences Research Council (Great Britain) (BBSRC), Scotland. Environment and Rural Affairs Dept. (SEERAD), Yara UK

Data sourced from Thomson Reuters' Web of Knowledge

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