Tag: asexual modes of reproduction

Layering: In this method, a branch of the plant is pulled towards the ground and a part of it is covered with moist soil leaving the tip of the branch exposed above the ground. After some time, new roots develop from the part of the branch buried in the soil. The branch is then cut off from the parent plant. The part of the branch which has developed roots grows to become a new plant (just like the parent plant). Jasmine plant (chameli) is propagated or produced by the layering method. We can see from that one left side branch and one right side branch of the parent jasmine plant have been buried in moist soil. The parts of branches which are buried in soil grow their own roots. When this happens, the branches of the parent plant connecting the newly formed plants are cut off so that the newly formed plants may grow on their own and develop into mature plants (like the parent plant). Jasmine cannot be propagated by flowers, seeds or stem

Stems are characterized by the presence of nodes and internodes, whereas roots lack these structures.

Plant cutting is the common method for vegetative propagation i.e asexual method by which plant can be grown. This method can be performed by using stem, roots or leaf. Stem cutting when placed in soil produces roots and leaves and grows into a new plant. Sugar cane, roses, citrus, durant, grapes, cocoa, bougainvillea, carnations and many other plants are largely and rapidly propagated by stem cuttings. Thus, the correct answer is option D.

The process of joining of a tissue or a small part into the tissues of another plant is called Grafting. The tissue or part inserted is called stock and the plant into which foreign part is inserted is called scion. During this process, a group of cells are formed initially. It is called callus.

So, the correct option is ‘Formation of callus’.

Ginger is a rhizome, which is an underground stem modified for food storage and perennation.

Agave reproduces vegetatively through bulbils, which are small plantlets that develop in the inflorescence.

Grafting is an artificial propagation technique in which tissue from one plant, the scion, is attached to another, the rootstock. The rootstock produces new vascular tissue with which to feed scion the graft heals itself.

The stock is the plant part containing strong root system and sicon is the plant part which contains better fruit and fruit yield. In root cells, the chromosome number remains constant, reduced half in egg cell. So the chromosome number for root cells are 48 and eggs are 12.

Tissue culture is also called Micropropagation.  it  is a type of vegetative propagation for producing a large number of genetically superior and pathogen-free transplants in a limited time and space. Micropropagation is the practice of rapidly multiplying stock plant material to produce a large number of progeny plants, using modern plant tissue culture methods. Micropropagation is used to multiply plants such as those that have been genetically modified or bred through conventional plant breeding methods. It is also used to provide a sufficient number of plantlets for planting from a stock plant which does not produce seeds, or does not respond well to vegetative reproduction.

Auxin is a plant hormone that is involved in various growth and developmental processes of plant. It stimulates the induction of rooting in stem cuttings. Bougainvillea plants are primarily propagated by stem cuttings. Hence, induction of rooting in stem cutting would be most beneficial in Bougainvillea.