Plant Propagation Techniques

Plant cells are totipotent means, each cell retains total potential to generate a new plant. Callus is an undifferentiated mass of cell generated in plant tissue culture from meristematic cells from which entire plant can be regenerated. The small piece of meristematic tissue which is used in tissue culture to generate callus is called an explant. The ratio between auxin and cytokinin is an important factor deciding initiation of roots and shoots. Phytohormone cytokinin promotes growth of shoot whereas auxin promotes growth of roots. Anther culture is done for production of haploids because anthers contain haploid microspores which can be used to generate new plants. Somatic embryos are produced by direct fusion of somatic cells one with nucleus and another without nucleus.

Cytokinins promote cell division and differentiation of young, relatively unspecialized cells into mature, more specialized cells in intact plants. They are a required ingredient in any plant tissue culture medium and must be present for cells to divide. In tissue culture, cytokinins interact with auxin during the formation of plant organs such as roots and stems. For example, in tobacco tissue culture a high ratio of auxin to cytokinin induces root formation, whereas a low ratio of auxin to cytokinin induces shoot formation.

Genetic engineering is the branch of science which deals with the modification of genes. The desired genes is isolated from the host and are inserted into the vectors. The vectors carries the foreign gene into the desired organism and multiples. The foreign gene multiplies along with the vector and produce a new character.

Vegetative reproduction is a form of asexual reproduction where new plants are produced from parts of the parent plant, resulting in genetically identical offspring, or clones.

An explant is any plant part, tissue, or organ excised from a donor plant and used to initiate an in vitro plant tissue culture. Other terms like stock and scion refer to parts used in traditional grafting, not tissue culture.

Murashige and Skoog (MS) medium is the most widely used nutrient medium for plant in vitro cell, tissue, and organ culture.

Micropropagation can be initiated from various types of plant tissue explants, including buds, leaves, stems, and roots, to regenerate whole clonal plants.

Somatic hybridization is a technique that allows the fusion of protoplasts from two different plant varieties or species to form a hybrid. This bypasses sexual reproduction barriers and is achieved through protoplast fusion.

In the vegetative propagation method of grafting, the scion is the upper part of the plant (without roots) that is selected for its desirable flowers or fruits. The stock is the rooted portion of the plant onto which the scion is attached.

The "eyes" of a potato are actually axillary buds capable of developing into new shoots. When a piece of potato containing at least one eye is planted, it grows into a new potato plant, making it a key structure for vegetative propagation.

Domestication involves breeding plants and animals over generations to highlight traits that are beneficial to humans, such as docility in animals or higher yields in crops. This process was a cornerstone of the agricultural revolution, enabling permanent human settlements.

Aeroponics is a method of growing plants where the roots are suspended in an air or mist environment and sprayed with a nutrient-rich solution, distinct from hydroponics where roots are submerged in water.

Hydroponics is the specific technique of growing plants in a nutrient-rich aqueous solution without soil.