Abstract
Drought stress (DS) is a hazardous abiotic prerequisite that is becoming increasingly severe around the world. As a result, new management measures to reduce the negative effects of DS are desperately needed to ensure improved agricultural productivity. This review focuses primarily on various DS mitigation strategies that can be utilized to overcome DS. In recent years, the application of biochar, plant growth promoting rhizobacteria (PGPR), and arbuscular mycorrhizal fungi (AMF) have emerged as major strategies for improving crop yields under DS conditions. PGPR increases osmolyte buildup, increases the aminocyclopropane-1-carboxylate (ACC) deaminase enzyme, and provides inaccessible nutrients to plants, hence boosting drought tolerance. Different genetic approaches, including as transcriptional engineering, miRNA engineering, and quantitative trait loci (QTL) mapping, have emerged as an incredibly efficient method for making drought-resistant plants. Drought-related phytohormones, signaling molecules, transcription factors, and transcriptional and translational changes are all affected by genomic intervention. It is critical for enhancing tolerance response to identify prospective transcription factors and target them for engineering the abiotic stress tolerance response in crop plants. Investigating novel QTLs for drought tolerance features using a fresh genetic resource would also be beneficial in dissecting the mechanisms governing the trait's diversity. This review aims to provide information to readers about drought mitigation measures including the usage of PGPR, AMF, biochar, phytohormones, chemicals, and genetic approaches.
Published Version
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