VIRUSLIKE PARTICLES IN THE MARINE ALGA CHORDA TOMENTOSA LYNGBYE (PHAEOPHYCEAE) 1

Polyhedral viruslike particles 170 nm in diameter were found in 3‐day‐old spores of the brown alga Chorda tomentosa Lyngbye grown in unsterilized seawater. In sterile seawater, spores of the same species were free of these particles and cell wall development around naked settled, zoospores and subsequent spore germination proceeded, normally. Spores containing the putative virus particles did not develop cell walls or show signs of germination. Severe lysis of cell organelles always accompanied, the presence of these particles.

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