Tag: common modes of vegetative propagation

Coffee plants can be propagated form seeds or by cuttings or air layers.
Stem cuttings or sections of the stalks called seeds or seed pieces propagate sugarcane.
Citrus can be propagated by budding, layering and cutting.
Thus, the correct answer is option (D), 'All of these'.

Cows, cat undergoes sexual reproduction. Peas also undergo sexual reproduction.
Sugarcane are propagated vegetatively, which is an asexual means of reproduction. The propagation of sugarcane is by cutting.
Thus, the correct answer is option (C), 'Sugar cane'

Grafting is simply inserting a portion of one plant (usually a shoot the scion) onto another the host so that they grow together to make a single plant. Grafting is very common in commercial horticulture virtually all mass-marketed roses are grafted onto a vigorous rootstock of a different variety many fruit trees and other ornamentals are treated similarly. Quality of fruits produced wilI depend upon genotypes of scion only, stock is just acting as a support.

Grafting is a technique whereby tissues from one plant are inserted into those of another so that the two sets of vascular tissues may join together.
The plant that is selected for its roots is called the stock while the other plant, selected for its stems, leaves, flowers or fruits is called the scion
Thus, the correct answer is option (B), 'Scion'.

Scion is the part of the grafted plant that gives rise to the plant shoot that will, later on, produce all of the plant parts such as leaves, stems, flowers, and fruits. Everything above the scion is cut off in the spring hence all nutrients and water absorbed by the roots becomes available to the growing scion. Thus the correct answer is option C.

Vegetative reproduction is a type of asexual reproduction in which new plants are formed from the vegetative parts like, tubers, runners, suckers, rhizomes etc. Some of the plants can be propagated by the means of cutting. The part which is cut is allowed to grow into a new plant. Cane cutting which means the stem cuttings are used in the case of sugarcane. Stem cuttings with one nodal leaf are used in the coffee plants. Stem and root cuttings can be used in the Citrus species. 

A number of methods of artificial propagation of plants are used in agriculture, and horticulture. The three common methods for the artificial propagation of plants are: cuttings, layering and grafting. 

Grafting is the artificial method of vegetative propagation which is applied for plants with weak root system. It involves transfer of part of one plant (scion) onto the lower part of another plant (stock) in such a way, to facilitate organic fusion or fusion of tissues. Here, the root stock is selected for its disease resistance and absorbing capacity which makes options A and C incorrect. Since, scion makes the upper above ground portion of plant, it is selected for superior quality of fruits and flowers. This makes option D incorrect and B correct.