With the beginning of civilisations and human settlements, the need to preserve excess foods became essential for survival. Since then, many traditional and household practices have evolved to limit food spoilage. Such as cooking, the addition of spices and fermentation. In modern commercial food production, spoilage and contamination are preserved by a variety of methods such as Filtration, Lyophilisation, Refrigeration, Pasteurisation, Canned Food, Vaccum packing, Irradiation, Food preservatives etc.
Explants are excised pieces of plant parts or tissues. They may be taken from any part of the plant body e.g., leaf, stem, root etc. A healthy and disease-free explant is necessary for the success of tissue culture.