Author

Keizo Nagasaki

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Open access Oct 2026

Ecological role of the heterotrophic protist Aurantiochytrium (Labyrinthulomycetes) as a key consumer of viral-induced dissolved organic matter following the lysis of the red tide-forming microalga Heterosigma akashiwo

ABSTRACT Marine algal blooms play a vital role in oceanic carbon cycling. However, the ecological consequences of the organic matter released following bloom collapse via viral infection are poorly understood. Recent studies have shown that viral infection dramatically alters the intracellular metabolite composition of...

Shu-He Chen, Miho Aoki, Keishiro Sano et al. · Microbiology spectrum · 0 citations

Open access Sep 2026

Quantifying Viral Lysis in Microalgae Using Cell‐Free rRNA

ABSTRACT Viral lysis is a major driver of phytoplankton mortality and a key source of dissolved organic matter in the ocean, yet quantitative and taxon‐resolved measurements of this process remain limited for eukaryotic plankton. Here, we demonstrate that cell‐free ribosomal RNA (rRNA) dissolved in the extracellular me...

Saki Kikuya, Y. Tomaru, Keizo Nagasaki et al. · MicrobiologyOpen · 0 citations