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Sulfur
is a constituent of the amino acids (methionine, cystine,
and cysteine), vitamins (biotin, thiamine, B1), and many
protein enzymes that regulate photosynthesis and N
fixation. Sulfur is closely associated with nitrogen in
the processes of protein and enzyme synthesis. Sulfur is
also a constituent of various aromatic oils that give
plants of cabbage and onion families their
characteristic odors and flavors. Hence, the cabbage,
onion, and legume families require especially large
amounts of sulfur.
Sulfur
is also responsible for several types of air, water, and
soil pollution and is consequently of increasing
environmental interest. The environmental issues
associated with sulfur include acid rain, certain types
of forest decline, acid mine drainage, and acid sulfate
soils.
Click
on the items in the cycle diagram to obtain more information.
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