Strategies For Enhancement In Food Production

Totipotency is the inherent capacity of a single plant cell to divide, differentiate, and regenerate into an entire plant, and it is the fundamental principle underlying tissue culture and micropropagation. In practice, explants are grown on a nutrient medium containing a carbon source and growth hormones under sterile conditions to form a callus, from which thousands of genetically identical plantlets, called somaclones, can be produced rapidly. Senescence is incorrect because it refers to the ageing and eventual death of plant cells, tissues, or organs, the opposite of regenerative capacity. Vernalization is wrong because it is the promotion of flowering by exposure to low temperature and has nothing to do with regenerating whole plants from cells. Transpiration is incorrect since it is the loss of water vapour from aerial parts of the plant and is unrelated to tissue culture. As stated in NCERT Class 12, Chapter 9 (Strategies for Enhancement in Food Production), micropropagation enables disease-free clonal propagation of crops like banana and orchids. As a consistency check, only totipotency describes the ability of one cell to grow into a whole plant, confirming it as the correct term for the basis of micropropagation.