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The effects of nitrogen supply and salinity on DMSP, glycine betaine and proline concentrations in leaves of Spartina anglica Mulholland, M.M.; Otte, M.L. (2002). The effects of nitrogen supply and salinity on DMSP, glycine betaine and proline concentrations in leaves of Spartina anglica. Aquat. Bot. 72(2): 193-200 In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522, meer

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Trefwoorden

Acids > Organic compounds > Organic acids > Amino acids > Glycine Acids > Organic compounds > Organic acids > Amino acids > Proline Chemical elements > Nonmetals > Atmospheric gases > Nitrogen Properties > Chemical properties > Salinity Spartina anglica C.E. Hubbard [WoRMS]

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Mulholland, M.M., correspondent Otte, M.L., meer

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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 μmol 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 μmol g-1 fresh weight and were unaffected by the treatments. Proline concentrations ranged form 3.1 to 50 μmol g-1 fresh weight and were positively affected by increasing salinity.

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