Question

What is the reason of formation of embryoid from pollen grain in tissue culture medium

• A. Cellular totipotency
• B. Organogenesis
• C. Double fertilization
• D. Test tube culture

Answer 1

The Correct Option is A

To understand the reason for the formation of an embryoid from a pollen grain in a tissue culture medium, we need to explore the concept of cellular totipotency.

Cellular Totipotency: This is a biological concept that refers to the ability of a single cell to develop into an entire organism or differentiate into any type of cells. In plant tissue culture, this ability is utilized to regenerate plants from various explants, including pollen grains.

In the given question, the correct answer is "Cellular totipotency" because:

1. Pollen grains, when cultured in suitable conditions, can express their totipotency to form embryoids (structures that can develop into a complete plant).
2. This process does not involve organogenesis directly because organogenesis refers to the formation of specific organs, which is a later stage of development.
3. Double fertilization is a process that occurs in the sexual reproduction of flowering plants involving the union of two sperm cells with two cells in the ovule. It is unrelated to embryoid formation in tissue culture.
4. "Test tube culture" is a general term for tissue culture techniques and does not specifically explain the embryoid formation from pollen grains.

Hence, the formation of embryoids from pollen grains in a tissue culture medium is predominantly due to their inherent cellular totipotency.