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- W2987335094 abstract "Volatile organic compounds (VOCs) produced by phytoplankton are molecules with high vapor pressures that can diffuse across cell membranes into the environment, where they become public goods. VOCs likely comprise a significant component of the marine dissolved organic carbon (DOC) pool utilized by microorganisms, but they are often overlooked as growth substrates because their diffusivity imposes analytical challenges. The roles of VOCs in the growth of the photoautotrophic diatom Thalassiosira pseudonana and heterotrophic bacterium Pelagibacter sp. HTCC1062 (SAR11) were examined using co-cultures and proton-transfer reaction time-of-flight mass spectrometry. VOCs at 82 m/z values were produced in the cultures, and the concentrations of 9 of these m/z values changed in co-culture relative to the diatom monoculture. Several of the m/z values were putatively identified, and their metabolism by HTCC1062 was confirmed by measuring ATP production. Diatom carbon fixation rates in co-culture with HTCC1062 were 20.3% higher than the diatom monoculture. Removal of VOCs from the T. pseudonana monoculture using a hydrocarbon trap caused a similar increase in carbon fixation (18.1%). These results show that a wide range of VOCs are cycled in the environment, and the flux of VOCs from phytoplankton to bacterioplankton imposes a large and unexpected tax on phytoplankton photosynthesis." @default.
- W2987335094 created "2019-11-22" @default.
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- W2987335094 date "2019-12-11" @default.
- W2987335094 modified "2023-10-18" @default.
- W2987335094 title "<i>Pelagibacter</i> metabolism of diatom‐derived volatile organic compounds imposes an energetic tax on photosynthetic carbon fixation" @default.
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- W2987335094 doi "https://doi.org/10.1111/1462-2920.14861" @default.
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