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A root in an unusual position, such as
on a stem or leaf. |
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Adventitious root are roots in an
unusual place, that originates from stem or leaf tissue rather than from
another root, often where a branch or other part contacts soil or damp
material. Adventitious roots are not ordinarily expected, and often they
are the result of stress or injury. A plant's normal growth comes from
meristematic tissue, but adventitious growth comes from non-meristematic
tissue. Adventitious roots are indeed very common in vascular plants. A
plant can not be reproduced from cuttings or layering unless
adventitious roots develop.
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