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Publication Type J
Authors Mulholland, M. M. and M. L. Otte
Title The effects of nitrogen supply and salinity on DMSP, glycine betaine and proline concentrations in leaves of Spartina anglica
Source Aquatic Botany
Abstract Spartina anglica tillers were grown for 7 weeks in a range of solutions containing 0, 400 or 800 mM sodium chloride and 0 or 2 mM ammonium nitrate. The leaves were analysed for dimethylsulphoniopropionate (DMSP), glycine betaine and proline as well as total nitrogen and total sulphur. Total nitrogen concentrations in green leaf tissue of plants grown in the 2 mM nitrogen treatments were twice as high as those found in plants grown with no added nitrogen, and were not affected by salinity. Total sulphur concentrations were not affected by any of the treatments. DMSP concentrations ranged from 4 to 48 mumol g-1 fresh weight. With no added nitrogen DMSP concentrations decreased with increasing salinity, while the 2 mM nitrogen treatments showed the reverse trend. Glycine betaine concentrations ranged from 49 to 77 mumol g-1 fresh weight and were unaffected by the treatments. Proline concentrations ranged form 3.1 to 50 mumol g-1 fresh weight and were positively affected by increasing salinity.
Author Address Mulholland, Maria M.; Department of Plant and Microbial Biology, University of California, III Koshland Hall, Berkeley, CA, 94720, USA mulholl@nature.berkeley.edu, marinus.otte@ucd.ie
ISSN 0304-3770
ISBN 0304-3770
Publication Date March
Year Published 2002
Volume 72
Issue 2
Beginning Page 193-200
Digital Object Identifier (DOI) 10.1016/s0304-3770(01)00228-5
Unique Article Identifier BCI:BCI200200260369
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