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Authors Husband, JD; Kiene, RP
Author Full Name Husband, J. Daniel; Kiene, Ronald P.
Title Occurrence of dimethylsulfoxide in leaves, stems, and roots of Spartina alterniflora
Source WETLANDS
Language English
Document Type Article
Author Keywords dimethylsulfide; dimethylsulfoniopropionate; oxidative stress; sulfur
Keywords Plus DIMETHYLSULPHONIOPROPIONATE DMSP; MARINE-ALGAE; DIMETHYLSULFONIOPROPIONATE BIOSYNTHESIS; DIMETHYL-SULFOXIDE; S-METHYLMETHIONINE; GLYCINE BETAINE; HIGHER-PLANTS; SALT MARSHES; NITROGEN; 3-DIMETHYLSULFONIOPROPIONATE
Abstract Spartina alterniflora is unique among salt marsh macrophytes in its synthesis of dimethylsulfoniopropionate (DMSP). One potential degradation product of DMSP is dimethylsulfoxide (DMSO). The concentrations of DMSP and DMSO were determined for S. alterniflora plants collected from Mobile Bay, Alabama. Although the distribution of DMSO within healthy S. alterniflora tissues mirrored somewhat that of DMSP, with the highest concentrations found in leaf tissue followed by stem and root tissue, the DMSO/DMSP ratio in root tissue was more than twice that in leaf or stem tissue. This is likely the result of a higher rate of DMS(P) oxidation in roots. It has been proposed that DMSP functions as an antioxidant in certain marine phytoplankton, and a similar function may be operational in S. alterniflora. Enhanced oxidative stress in the S. alterniflora root zone may help explain the high DMSO/DMSP ratio. In support of this idea was the finding that the DMSO/DMSP ratio was higher in tissues presumably experiencing increased oxidative stress such as yellowing S. alterniflora leaves and senescing segments of individual leaves compared to healthy tissue. The occurrence of DMSO in tissues of S. alterniflora is consistent with DMS(P) functioning as an antioxidant in this plant. Higher DMSO/DMSP ratios in stressed leaves further supports that role. However, specific roles for DMSP, DMS, or DMSO in oxidative stress protection in S. atterniflora remain to be demonstrated.
Author Address Univ S Alabama, Dept Marine Sci, Mobile, AL 36688 USA; Dauphin Isl Sea Lab, Dauphin Isl, AL 36528 USA
Reprint Address Husband, JD (corresponding author), Univ S Alabama, Dept Marine Sci, Mobile, AL 36688 USA.
E-mail Address DTheuri@cox.net
Times Cited 16
Total Times Cited Count (WoS, BCI, and CSCD) 16
Publisher SPRINGER
Publisher City DORDRECHT
Publisher Address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN 0277-5212
29-Character Source Abbreviation WETLANDS
ISO Source Abbreviation Wetlands
Publication Date JUN
Year Published 2007
Volume 27
Issue 2
Beginning Page 224
Ending Page 229
Digital Object Identifier (DOI) 10.1672/0277-5212(2007)27[224:OODILS]2.0.CO;2
Page Count 6
Web of Science Category Ecology; Environmental Sciences
Subject Category Environmental Sciences & Ecology
Document Delivery Number 181FS
Unique Article Identifier WOS:000247423000002
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