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Free polyamine concentrations in coastal seawater during phytoplankton bloom

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Polyamines are widely distributed in nature and known to have many roles in living organisms. We investigated the concentrations of polyamines together with inorganic nutrients during a summer bloom period in the Seto Inland Sea of Japan. Putrescine and spermidine were the major polyamines in the coastal seawater. The concentrations at 1 m depth varied widely during the sampling period and ranged from 2.0 to 32.6 nM and 1.0 to 14.1 nM. Spermine concentrations were much lower than putrescine and spermidine. In addition, other polyamines (diaminopropane, cadaverine, norspermidine, homospermidine, norspermine) were also detected. Putrescine and spermidine seemed to be significant compounds in dissolved organic nitrogen in coastal seawater.

Keywords: bloom; phytoplankton; polyamine; putrescine; seawater; spermidine

Document Type: Research Article

Affiliations: 1: Laboratory of Natural Resources Management, Shikoku National Agricultural Experiment Station, Zentuzi, Hyogo 675-0053, Japan 2: Shikoku University Junior College, Shikoku University, Ojin, Tokushima 771-1192,

Publication date: February 1, 2001


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