Advertisement

Marine Biology

, Volume 136, Issue 5, pp 759–764 | Cite as

DMSP-lyase activity in five marine phytoplankton species: its potential importance in DMS production

  • T. Niki
  • M. Kunugi
  • A. Otsuki

Abstract

Activity of DMSP-lyase, which cleaves dissolved DMSP (henceforth DMSPd-lyase), was examined in five axenically cultured phytoplankton species, including both DMSP-producing and non-DMSP-producing species. High DMSPd-lyase activity was found in two DMSP producers, Heterocapsa triquetra strain NIES-7 and Scrippsiella trochoidea strain NIES-369 (Dinophyceae). The DMS production rates at 100 nM DMSPd were 0.5 fmol cell−1 min−1 for H. triquetra and 0.3 fmol cell−1 min−1 for S. trochoidea. In a non-DMSP producer, Heterosigma akashiwo strain NIES-6 (Raphidophyceae), the DMSPd-lyase activity was not found. Two DMSP-producing Prymnesiophyceae species, Isochrysis galbana strain CCMP-1323 and Gephyrocapsa oceanica strain NIES-353, did not show any obvious activity either, in contrary to other authors' findings on Phaeocystis sp., another DMSP-producing Prymnesiophyceae species. The comparison of the DMSPd-lyase activity of the two Dinophyceae species with bacterial DMSP consumption and DMS production activity in Tokyo Bay showed that the DMSPd-lyase activity of H. triquetra and S. trochoidea could be an important mechanism for DMS production during their blooms.

Keywords

Phytoplankton Production Rate Production Activity Potential Importance Phytoplankton Species 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • T. Niki
    • 1
  • M. Kunugi
    • 2
  • A. Otsuki
    • 1
  1. 1.Department of Marine Science and Technology, Tokyo University of Fisheries, 4-5-7 Kounan, Minato-ku, Tokyo 108-0075, JapanJP
  2. 2.National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-0053, Japan e-mail: kunugi@nies.go.jpJP

Personalised recommendations