On what part of the plant can adventitious roots develop?

Accessory roots are roots that form on the stems of a tree. Sometimes they can form on the leaves. Often such roots can be forced to grow artificially. Sometimes you can see decorative mulberries with branches that are lowered down. Few people know, but in fact these are the roots of a tree that have turned into stems. Such trees are planted with their roots up. The plant adapts and takes root from the stems and leaves from the roots. Trees do not always survive, but in most cases this effect can be achieved.