Question

Part of plant used for culturing is called
A. Scion
B. Explant
C. Stock
D. Callus

Answer 1

Hint:- Explant tissues maintain their cytokines, and proliferation is less stressful and more biologically important due to growth factors. In molecular contact with the explant's accompanying cells, cells migrating from the explant provide important biochemical and biomechanical signals that are necessary for tissue morphogenesis, proliferation, and homeostasis.

Complete answer:
The scion is the upward part of the plant used during the process of grafting, a procedure of viticulture that joins two parts, the bottom part or rootstock of the scion. The scion portion of this mixture grafting is going to be the part that generates more growth. Typically, for its grapes, stems, or leaves, a vine is picked and combined with another grapevine that has valuable roots.
Tissue culture is a biological technique that involves the production of the plant on a nutritional culture medium of known concentrations by the totipotent cells under regulated conditions. Totipotent cells such as roots, stem leaves, pollens, etc are taken from the active part of the plant. The plant component used by the culture is referred to as the explant.
Grafting is the act of putting into or on a stem, root, or branch of another (stock) component of one plant (bud or scion) in such a manner that a union is established and they both continue to grow. The stock is called the part of the mixture that provides the root and the inserted piece is called the scion. The callus is characterized as a group of cells obtained from competent tissue sources that are cultured to form an undifferentiated mass of cells under in vitro environments.

So, the correct answer is option (B).

Note:- Explant tissues maintain their cytokines, and division is not much stressful and more biologically important due to the growth factors present. In molecular contact with the explant's accompanying cells, cells migrating from the explant provides important biochemical and biomechanical signals that are necessary for tissue morphogenesis, proliferation, and homeostasis.