Q.(a) What are the roles of botanical gardens in conserving biodiversity? Discuss. OR

Botanical gardens conserve biodiversity mainly through ex-situ conservation of living plant collections, alongside seed/herbarium banking, research, and public education.

Botanical gardens are institutions that maintain documented, scientifically arranged living collections of plants, and they play several important roles in conserving biodiversity:

1. Ex-situ conservation: they grow and maintain living specimens of a wide variety of plant species — including rare, threatened, or endangered ones — away from their natural habitat, safeguarding them from extinction risks (habitat loss, climate change, over-exploitation) that they may face in the wild.
2. Germplasm and seed banks: many botanical gardens maintain seed banks and tissue-culture repositories, preserving genetic material that can later be used for propagation, reintroduction into the wild, or research, even if a species is lost from its natural habitat.
3. Herbaria and taxonomic reference collections: preserved, pressed specimens (herbarium sheets) housed at botanical gardens serve as a permanent scientific record of a species' identity and distribution, essential for taxonomic study and for verifying plant identifications.
4. Research: botanical gardens support scientific research into plant taxonomy, systematics, propagation techniques, and conservation biology, generating the knowledge needed to protect species effectively.
5. Propagation and reintroduction: species propagated in botanical gardens can be used to reintroduce or reinforce wild populations of endangered plants. …