GENERAL INTRODUCTION 5 general introduction 2 ABIOTIC STRESSES 1 AGRICULTURE AND ENVIRONMENT 1 ANALYSIS OF IMMEDIATE ECONOMIC IMPACT 1 BIODIVERSITY AND AGRICULTURE 1 BIOTECHNOLOGY AND DEVELOPING COUNTRIES 1 CELLS,MOLECULES AND ATOMS 1 CROP GENETIC RESOURCES AND PLANT BREEDING 1 EROSION AND LAND DEGRADATION 1 FURTHER ECONOMIC IMPACTS 1 MANAGEMENT OF SOIL,WATER ANDNUTRIENTS 1 NUCLEIC ACIDS 1 PLANT PROTECTION 1 RECOMBINANT DNA TECHNOLOGY 1 RIBOSE NUCLEIC ACID 1 SCOPE AND IMPORTANCE 1 TECHNIQUES 1 bacteria:structure and classification 1 diseases of cereals and grasses 1 diseases of legumes 1