Abstract
SUMMARYFour mosses, Bryum argenteum, Grimmia pulvinata, Hypnum cupressiforme and Tortula muralis were exposed to sulphite, and their uptake of radioactive bicarbonate measured. About 50% reduction in 14C uptake was caused by 0.01‐0.1 mM sulphite. The effect of pH indicated that SO2 (or‘H2SO3') was the active molecular species. Fluoride had little effect on 14C uptake.
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