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Discovered: Why leaves fall off trees
Wednesday, September 24, 2008 www.dnaindia.com
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Features
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LONDON: Ever wondered why leaves fall off trees in fall? Well, the secret actually lies in cellular mechanism, says a new study.
Researchers have found that trees use an elaborate cellular mechanism to part company from their leaves, which act as "solar cells" in the summer but become superfluous in the darker winter months.
According to them, at the base of each leaf is a special layer called t
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leaves
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