Growing, axenic cultures of the eukaryohc marine microalga Micromonas pusilla (Prasinophyceae) were inoculated with 0.7 infectious particles cell-' of the vlral pathogen MPV (Micromonas pusilla virus). Starting 1 1 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 manne phytoplankton may thus participate in the biological shaping of global climate.
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Hill et al. (1998) studied this question.
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