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

Journal of Experimental Botany
Mark Durenkamp, L J De Kok

Abstract

Onion (Allium cepa L.) was able to use atmospheric H(2)S as sole sulphur source for growth. The foliarly absorbed H(2)S was rapidly metabolized into water-soluble, non-protein thiol compounds, including cysteine, and subsequently into other sulphur compounds in the shoots. In H(2)S-exposed plants, the accumulation of sulphur compounds in the shoots was nearly linear with the concentration (0.15-0.6 microl l(-1)) and duration of the exposure. Exposure of onion to H(2)S 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 H(2)S 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 H(2)S 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 H(2)S exposure did not result in a down-regulation of the sulphate...Continue Reading

Citations

May 7, 2013·Journal of Experimental Botany·Sébastien VarinJean-Bernard Cliquet
Mar 4, 2014·Nitric Oxide : Biology and Chemistry·Alexander Calderwood, Stanislav Kopriva
Jul 26, 2015·Journal of Experimental Botany·Juan ChenHai-Lei Zheng
Sep 14, 2007·Plant Biology·H RennenbergS Kopriva
Nov 4, 2006·Plant, Cell & Environment·Malcolm J Hawkesford, Luit J De Kok
Jul 11, 2012·The Plant Journal : for Cell and Molecular Biology·Hans-Michael HubbertenRainer Hoefgen
Nov 30, 2012·The New Phytologist·Daniela SiehFranziska Krajinski
Jan 8, 2015·Frontiers in Plant Science·Tahereh AghajanzadehLuit J De Kok
Jun 2, 2015·PloS One·Harald Hasler-Sheetal, Marianne Holmer
Mar 31, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Susana González-MoralesAdalberto Benavides-Mendoza
May 10, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Mohamed A FaragLudger A Wessjohann
Jan 13, 2017·Current Pharmaceutical Design·Spyridon PetropoulosGeorgia Ntatsi
Jul 3, 2019·Frontiers in Plant Science·Ties Ausma, Luit J De Kok

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