Vegetative propagation of plants via cuttings depends on adventitious root formation.
From the en.wikipedia.org
Auxin induces both growth of pre-existing roots and adventitious root formation, i.e., branching of the roots.
From the en.wikipedia.org
However, high concentrations of auxin inhibit root elongation and instead enhance adventitious root formation.
From the en.wikipedia.org
In some conifers adventitious roots can form the largest part of the root system.
From the en.wikipedia.org
Root climbers produce adventitious roots that cling to other structures for support, for example Virginia creeper.
From the smh.com.au
They often respond by producing adventitious roots, which grow from stem tissue rather than root tissue.
From the post-gazette.com
Adventitious roots arise out-of-sequence from the more usual root formation of branches of a primary root, and instead originate from the stem, branches, leaves, or old woody roots.
From the en.wikipedia.org
Auxins are also often used to promote initiation of adventitious roots, and are the active ingredient of the commercial preparations used in horticulture to root stem cuttings.