Chapter 1. Agrobacterium rhizogenes-Mediated Transformation and Its Biotechnological Applications in Crops.- Chapter 2. Bioinformatic Tools in Crop Improvement.- Chapter 3. Crop Improvement Through Plant Tissue Culture.- Chapter 4. Mutagenesis – A Potential Approach for Crop Improvement.- Chapter 5. Role of Bio-fertilizers in Crop Improvement.- Chapter 6. Plant-Microorganism Interactions: Effects on the Tolerance of Plants to Biotic and Abiotic Stresses.- Chapter 7. Biotic Stress and Crop Improvement: A Wheat Focus Around Novel Strategies.- Chapter 8. Variability in Fusarium Species Causing Wilt Disease in Crops: A Transcriptomic Approach to Characterize Dialogue Between Host and Pathogen.- Chapter 9. Coping Abiotic Stress with Plant Volatile Organic Chemicals (PVOCs): A Promising Approach.- Chapter 10. An Overview of Omics for Wheat Grain Quality Improvement.- Chapter 11. From Agronomy  to Molecular Genetics and Proteomics in an Effort to Improve Nitrogen Use Efficiency in Crops.- Chapter 12. Arsenic Toxicity and Tolerance Mechanisms in Plants: An Overview.- Chapter 13. Arsenic Stress in Plants: An Inside Story.- Chapter 14. In vitro Production of Secondary Metabolites Using Elicitor in Catharanthus roseus: A Case Study.- Chapter 15. Handling Soybean (Glycine max L.) Under Stress.- Chapter 16. Environmental and Economical Opportunities for the Valorisation of the Genus Atriplex: New Insights.- Chapter 17. Dealing with Environmental Stresses: Role of Polyamines in Stress Responses.