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Unformatted text preview: Clinging and climbing roots Aerial roots • The velamen layer roots of orchids are aerial roots, which may be used for gas exchange or for protection. The velamen is a multi-layered modified epidermis, which contains chloroplasts for photosynthesis. Velamen also provides mechanical protection and prevents water loss....
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.
- Fall '09