Understanding Plant Tissue Culture Steps

Plant tissue culture involves a series of specific steps to propagate plants in vitro. The correct sequence ensures successful growth and regeneration.

Correct Sequence Explanation

1. Media Selection (B): The process begins with choosing the appropriate nutrient medium formulation. This medium provides the necessary nutrients, hormones, and growth regulators for the plant tissues.
2. Explant Sterilization (A): The selected plant material, known as the explant, must be surface sterilized to remove any contaminants like bacteria, fungi, or viruses. This step is critical for aseptic culture.
3. Inoculation of Explants (D): After sterilization, the explant is transferred and placed onto the prepared nutrient medium under sterile conditions. This is called inoculation.
4. Regeneration and Development: The explant proliferates and differentiates on the medium, leading to the formation of callus, shoots, and/or roots.
5. Excision of Regenerated Shoots (C): Once shoots have developed sufficiently, they are often excised (cut) from the main explant or callus. This allows for individual development or subculturing onto a new medium for rooting.
6. Transfer of Plantlets (E): The well-developed plantlets are then hardened off and transferred from the sterile in vitro environment to a sterile soil mixture or other substrates for acclimatization to ex vitro conditions.

Therefore, the correct order of steps is B, A, D, C, E.