Journal
MARINE CHEMISTRY
Volume 125, Issue 1-4, Pages 19-25Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.marchem.2011.01.007
Keywords
Trace gas; Biogeochemistry; Cyanobacteria
Categories
Funding
- Natural Environmental Research Council (NERC) UK [NE/D006511/1]
- NERC [NE/E003974/1, NE/D006511/1] Funding Source: UKRI
- Natural Environment Research Council [NE/E003974/1, NE/B501039/1, NE/D006511/1] Funding Source: researchfish
Ask authors/readers for more resources
Iodomethane (CH3I) production by Prochlorococcus marinas (CCMP 2389) and Synechococcus sp. (CCMP 2370) was investigated using laboratory cultures. In contrast to Synechococcus, where no trace gas production was observed. P. marinas cells produced CH3I. The rate of CH3I production by P. marinus was found to vary depending on the physiological state of the cells as defined by photosynthetic health (F-v/F-m) measurements, SYTOX Green staining (which evaluates membrane permeability) and calculated in vivo fluorescence per cell (a proxy of pigment content per cell). The highest total cell normalised production rates (7189 [range 5225-11,517] molecules CH3I cell(Total) day(-1)) were observed when F-v/F-m was <= 0.3 and >= 75% of the cells were SYTOX Green labelled. Relatively lower rates of CH3I production (146[103-267] molecules CH3I cell(Total) day(-1)) were observed when F-v/F-m was >= 0.5 and <= 20% of the P. marinas cells were SYTOX Green labelled. Our results suggest that discrepancies in the CH3I production rates by Prochlorococcus observed between previous studies could be due to differing cell physiology. Calculations are presented which suggest that Prochlorococcus could contribute significantly to CH3I production in the eastern tropical Atlantic Ocean. This study highlights the importance of considering cell physiological state when determining trace gas production rates in laboratory culture and extrapolating them to the natural environment. (C) 2011 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available