Q)Explain vegetative propagation through layering. Give examples.
Answers
Answer:
Explanation:Commonly grafted plants are apple, peach, pear, and pecan trees and grapevines. 2. Layering is creating two plants getting roots to grow from a branch and cutting the connection from the parent plant. Branches, or stems of a plant, are bent downward while still attached to the parent plant and buried in the soil.
Answer:
layering is a form of vegetative propagation in which a branch of plant come in contact with soil and start developing root from there and after some separated from parental plant.
Explanation:
1.Simple layering means bending a low growing, soft stem to the ground. It can be done on most plants with low-growing branches. e.g.- climbing roses, forsythia, rhododendron, honeysuckle, boxwood etc.
Simple layering can be done in spring season using a dormant branch, or in early rainy season using a mature branch. It may take one or more seasons before the layer is ready to be removed for transplanting
2. Tip Layering
Tip layering is almost similar to simple layering. Dig a hole 3 to 4 inches deep. put the tip of a current season’s shoot and cover it with soil. The tip grows downward first, then grows upward. Roots form at the bend. The tip becomes a new plant. Remove the tip layer and plant it in early spring.e.g.- purple and black raspberries.
3. Compound (serpentine) layering is similar to simple layering, but several layers can result from a single stem. Bend the stem to the rooting medium as for simple layering, but alternately cover and expose sections of the stem. Each section should have at least one bud exposed and one bud covered with soil. Wound the lower side of each stem section to be covered (Figure 3). eg.- pothos, wisteria, clematis, and grapes
4. Mound (stool) layering is useful with heavy-stemmed, closely branched shrubs and rootstocks of tree fruits. Cut the plant back to 1 inch above the soil surface in the dormant season. Dormant buds will produce new shoots in the spring. Mound soil over the new shoots as they grow. Roots will develop at the bases of the young shoots. Remove the layers in the dormant season. e.g.- apple rootstocks, spirea, quince, daphne, magnolias.
5. Air layering can be used to propagate large, overgrown house plants such as rubber plant, croton, or dieffenbachia that have lost most of their lower leaves. Woody ornamentals such as azalea, camellia, magnolia, oleander, and holly can also be propagated by air layering. For woody plants, stems of pencil size diameter or larger are best. Choose an area just below a node and remove leaves and twigs on the stem 3 to 4 inches above and below this point. This is normally done on a stem about 1 foot from the tip.
Air layering differs, depending on whether the plant is a monocot or a dicot.
6. Natural Forms of Layering
Sometimes layering occurs naturally, without the assistance of a propagator. Runners and offsets are specialized plant structures that facilitate propagation by layering.
A runner produces new shoots where it touches the growing medium. Plants that produce runners are propagated by severing the new plants from their parent stems. Plantlets at the tips of runners may be rooted while still attached to the parent or detached and placed in a rooting medium. e.g.- strawberry and spider plant.