Contents: 1. Plant biodiversity : principles and conservation. 2. Ways to conserve plant biodiversity. 3. The role of plant genetic resources in conserving biodiversity. 4. Biotechnological techniques for biodiversity conservation. 5. Biodiversity and germplasm conservation. 6. Synthetic seeds and biodiversity conservation. 7. Conservation of fruit and plantation crops through biotechnology. 8. Conservation of vegetable crops through biotechnology. 9. Conservation of spices and condiments through biotechnology. 10. Conservation of flower crops through biotechnology. Glossary. Selected bibliography. Appendices.