what is the meaning of adventitious roots?

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.

Hi!

Roots which arise from structures other than the root called adventitious roots. They can arise from either leaf or stem.

Hi,

Adventitious roots are those roots which arise from parts of the plant other than radicle. Sometimes when roots grow from stems are called adventitious roots. For example- Banyan tree. Adventitious roots serve a purpose of vegetative propagation and other functions also.

Hope this answer helps,

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.