PLANT CELL BIOTECHNOLOGY AND MOLECULAR BIOLOGY

Drought stress poses a significant threat to global food security, particularly impacting vegetable crops that are essential for human nutrition. This review paper synthesised the current state of knowledge on breeding strategies aimed at enhancing drought resistance in vegetable crops.  A systematic analysis was done on the key genetic and physiological mechanisms underlying drought response in vegetables, providing insights into the complex traits involved. The review highlighted advancements in molecular breeding techniques, genomics, and phenomics that have facilitated the development of drought-tolerant varieties. Moreover, the role of traditional breeding methods, genetic engineering, and emerging technologies in imparting resilience to vegetables under water scarcity conditions was assessed. Additionally, the impact of climate change on drought patterns and its implications for vegetable breeding programs were explored. It was found that functional genomics, a field of molecular biology, is a technique that uses high-throughput techniques like DNA microarrays, proteomics, metabolomics and mutation analysis to describe the function and interactions of genes. Many major crops lack the ability to synthesise the special osmoprotectants that are naturally accumulated by stress-tolerant organisms. The genetic engineering of metabolic pathways for the production of osmolytes such as mannitol, fructans, trehalose, proline, or glycinebetaine might increase resistance to drought. By integrating findings from diverse research approaches, this review offered a comprehensive understanding of the challenges and opportunities in breeding for drought resistance in vegetable crops. It was concluded that despite challenges, the pursuit of resilient cultivars through conventional and molecular breeding methods is crucial for sustainable agriculture in the face of escalating water scarcity. As agriculture grapples with climate uncertainties, the insights gleaned from this review provide a roadmap for continued research and innovation in fostering drought-resistant vegetable crops. The synthesis of knowledge presented herein serves as a valuable resource for researchers, breeders, and policymakers striving to enhance the sustainability and resilience of vegetable production systems in the face of evolving climate scenarios.