Q111: ‘What is a plant tissue culture repository? - Tissue Culture - Molecular Biology and Biotechnology- ICAR JRF/SRF 2024 | Agrigyan

• Plant Tissue Culture Repository: A plant tissue culture repository is a specialized ex situ germplasm conservation and storage facility where viable in vitro plant cultures, shoot tips, meristems, and cell cultures are conserved over long durations under controlled environmental regimes.
• Conservation Methods: Employs slow-growth storage techniques (low temperature, osmotic agents, or minimal light) for medium-term storage, and cryopreservation in liquid nitrogen ($-196^\circ\text{C}$) for indefinite long-term genetic preservation of vegetatively propagated and recalcitrant species.
• Conclusion: It refers to a storage facility where plant tissue cultures are preserved for the long term (Option 2).

Correct option: (2) A storage facility where plant tissue cultures are kept for the long term.