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A stem cutting produces new roots, and a root cutting produces new stems. Some plants can be grown from leaf pieces, called leaf cuttings, which produce both stems and roots. The scions used in grafting are also called cuttings. [1] Propagating plants from cuttings is an ancient form of cloning.
A cutting is a part of the plant, usually a stem or a leaf, is cut off and planted. Adventitious roots grow from cuttings and a new plant eventually develops. Usually those cuttings are treated with hormones before being planted to induce growth. [28]
Rose cuttings under plastic bottle greenhouse. Plant roots, stems, and leaves have a number of mechanisms for asexual or vegetative reproduction, which horticulturists employ to multiply or clone plants rapidly, such as in tissue culture and grafting. [7]
When a full root has formed and leaves begin to sprout anew, the clone is a self-sufficient plant, [7] genetically identical. Examples include cuttings from the stems of blackberries ( Rubus occidentalis ), African violets ( Saintpaulia ), verbenas ( Verbena ) to produce new plants.
If such a tree is planted with the graft below the soil, then the scion portion can also grow roots and the tree will still grow to its standard size. Ease of propagation: Because the scion is difficult to propagate vegetatively by other means, such as by cuttings. In this case, cuttings of an easily rooted plant are used to provide a rootstock.
Plant hormones, termed auxins, are often applied to stem, shoot or leaf cuttings to promote adventitious root formation, e.g., African violet and sedum leaves and shoots of poinsettia and coleus. Propagation via root cuttings requires adventitious bud formation, e.g., in horseradish and apple. In layering, adventitious roots are formed on ...