Skip Navigation



JXB Advance Access published online on July 2, 2004
Journal of Experimental Botany, doi:10.1093/jxb/erh187
© 2004 by Oxford University Press
This Article
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
55/404/1821    most recent
erh187v1
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Durenkamp, M.
Right arrow Articles by De Kok, L. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Durenkamp, M.
Right arrow Articles by De Kok, L. J.
Agricola
Right arrow Articles by Durenkamp, M.
Right arrow Articles by De Kok, L. J.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Received February 18, 2004
Accepted April 29, 2004

Sulphur Metabolism Special Issue Article

Impact of pedospheric and atmospheric sulphur nutrition on sulphur metabolism of Allium cepa L., a species with a potential sink capacity for secondary sulphur compounds

Mark Durenkamp 1 Luit J. De Kok 1*

1 Laboratory of Plant Physiology, University of Groningen, PO Box 14, 9750 AA Haren, The Netherlands

* To whom correspondence should be addressed. E-mail: l.j.de.kok{at}biol.rug.nl.


  Abstract

Onion (Allium cepa L.) was able to use atmospheric H2S as sole sulphur source for growth. The foliarly absorbed H2S was rapidly metabolized into water-soluble, non-protein thiol compounds, including cysteine, and subsequently into other sulphur compounds in the shoots. In H2S-exposed plants, the accumulation of sulphur compounds in the shoots was nearly linear with the concentration (0.15-0.6 µl l-1) and duration of the exposure. Exposure of onion to H2S for up to 1 week did not affect the sulphur content of the roots. Secondary sulphur compounds formed a sink for the foliarly absorbed sulphide, and the sulphur accumulation upon H2S exposure could, for a great part, be ascribed to enhancement of the content of {gamma}-glutamyl peptides and/or alliins. Furthermore, there was a substantial increase in the sulphate content in the shoots upon H2S exposure. The accumulation of sulphate originated both from the pedosphere and from the oxidation of absorbed atmospheric sulphide, and/or from the degradation of accumulated secondary sulphur compounds. From studies on the interaction between atmospheric and pedospheric sulphur nutrition it was evident that H2S exposure did not result in a down-regulation of the sulphate uptake by the roots.

Keywords: Alliins; Allium cepa; {gamma}-glutamyl peptides; hydrogen sulphide; onion; secondary sulphur compounds; sulphate; sulphur deficiency; sulphur deprivation; sulphur metabolism; thiols.
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 J Exp BotHome page
M. Durenkamp, L. J. De Kok, and S. Kopriva
Adenosine 5'-phosphosulphate reductase is regulated differently in Allium cepa L. and Brassica oleracea L. upon exposure to H2S
J. Exp. Bot., May 1, 2007; 58(7): 1571 - 1579.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.