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AME 14:1-6 (1998)
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Abstract
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Virus-mediated total release of dimethylsulfoniopropionate from marine phytoplankton: a potential climate process
Richard W. Hill1,*, Bradley A. White1, Matthew T. Cottrell2,**, John W. H. Dacey3
1Department of Zoology, Michigan State University, East Lansing, Michigan 48824, USA
2Marine Science Institute, University of Texas at Austin, Port Aransas, Texas 78373, USA
3Department of Biology, Woods Hole
Oceanographic Institution, Woods Hole, Massachusetts 02543, USA
*E-mail: hillr@pilot.msu.edu
**Present address: College of Marine Studies, University of Delaware, Lewes, Delaware 19958, USA
ABSTRACT: Growing, axenic cultures of the eukaryotic marine microalga Micromonas pusilla (Prasinophyceae) were inoculated with 0.7 infectious particles cell-1 of the viral pathogen MPV (Micromonas pusilla virus). Starting 11 to 14 h after
the inoculation, rapid release of intracellular dimethylsulfoniopropionate (DMSP) to the dissolved pool occurred along with cell lysis. DMSP release was total. Release facilitates bacterial degradation of DMSP to dimethylsulfide, a gas that affects cloud
cover over the oceans. Viruses of eukaryotic marine phytoplankton may thus participate in the biological shaping of global climate.
KEY WORDS: Dimethylsulfide · Dimethylsulfoniopropionate · Algal virus · Micromonas pusilla · MPV
Published in AME Vol.
14, No. 1
(1998) on January 2
Print ISSN: 0948-3055; Online ISSN: 1616-1564.
Copyright © Inter-Research, Oldendorf/Luhe, 1998
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