|All life needs some chloride so it would make
sense that plants use chloride. The chloride in
sweat evaporates with the water. Do plants obtain
this chloride from water that has chloride in it
due to chloride secretions such as in sweat, or is
there a separate chloride cycle?|
Chlorine is necessary in growth for plants. You
are correct in thinking about it as a separate
cycle. In this cycle, plants get chlorine from the
ground through their roots: chloride ions are
naturally occurring, and specialized cells in the
roots uptake this chlorine for use in cell cycles.
(I didn't know this until today, that was a really
Chloride does not evaporate; it is left behind in
the form of salt. Most salt in nature is sodium
chloride, although potassium chloride and calcium
chloride are also fairly common
chlorine-containing natural salts.
Most chloride salts, including all of the
common ones, dissolve in water very well. Plants
get their nutrients, including chloride ions, from
the water they draw up from the ground.
When you sweat and the water evaporates the
Chloride ions actually are left behind. That's why
you feel crusty and salty after your sweat
evaporates. In terms of plants there are some
small uses for Chlorine atoms. It's mostly toxic
and plants have evolved ways to exclude it from
tissues. Plants do need small amounts of chlorine
for growth, however. If you deprive a plant of any
chlorine, the leaves will turn yellow and die.
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