Wednesday, September 10, 2008

How plants communicate and control the weather

Gone are the days of believing plants are just passive organisms. Earlier this year, researchers found that plants can communicate through little understood chemical mechanisms. Now scientists are even saying that plants can do something perhaps even more incredible: Control the weather. According to researchers at the Scottish Association for Marine Science and the University of Manchester, brown seaweed, kelp, has the ability to create cloudy days at the seaside. But why would plants want to alter weather patterns? Apparently, because cloudy days make the plants more comfortable.

When the sky is overcast kelp are comfortable when the tide goes out, since they are able to stay moist until it comes back. On a bright day however, they dry out. When they start getting dry the plants become stressed and begin releasing iodide. The iodide rises, causing clouds to form overhead, which in turns protects the kelp from unwelcome sunshine.

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