This book provides an authoritative review of many aspects of current interest and progress in the field of plant biotechnology that has been made in the recent past. This book includes thirty one chapters, prepared by specialists covering information on biotechnology of oil crops, coffee, mint, fruit crops, trees, hydrocarbon yielding plants, etc. Topics covering medicinal plants, transgenic plants, gene therapy, production of disease resistant plants, etc. have been specially included to project their use in the 21 century.