Microbial Marvels in Cotton Farming: Unveiling the Potential of Plant Beneficial Microbes for Enhanced Growth and Disease Resistance in Pakistan

Abstract

Cotton is a crucial cash crop in Pakistan, playing a pivotal role in the country's economy, agricultural sector, and employment opportunities. Its cultivation spans over 3 million hectares, primarily concentrated in the Punjab and Sindh provinces. Cotton production in Pakistan contributes significantly to the country's foreign exchange earnings, accounting for a substantial portion of its exports However, cotton pest and disease management is always a challenge as their impact change over time. The widespread use of agrochemicals and synthetic pesticides in major field crops poses significant threats to human and animal health, as well as environmental degradation. Use of beneficial microbes for sustainable cotton production can be a natural ally in the field, as they promote the plant growth as well as protect them from disease, insects and pests. They act as a reservoir of beneficial metabolites, enzymes, and nutrients, and they play a crucial role in biological pest control and disease resistance induction. Additionally, PGP rhizobacteria possess bioremediation potential, enabling them to phytoextract and detoxify pollutants and pesticides. Beneficial microorganisms like PGPR hold immense potential to replace and supplement these toxic chemicals, offering promising applications in organic farming and contributing to sustainable agricultural practices. Despite their potential, only a limited number of bio-formulations have been developed using PGPR strains with plant growth promotion, metabolite production, enzyme synthesis, nutrient mobilization, and biocontrol activities. An increasing body of evidence underscores the potential of diverse microorganisms to enhance plant productivity and yield within cropping systems. Unlocking the full benefits of these advantageous microbes requires a profound understanding of their role in promoting growth, specifically in the realms of fertilization and disease control, along with the elucidation of underlying mechanisms. It is imperative to confront challenges associated with the application of plant growth-promoting (PGP) microbes. This review focuses on the application of PGP microbes in the context of cotton production. Given the scarcity of information on beneficial microbes for cotton production, a comprehensive examination of current research becomes crucial, especially given the increasing interest in cotton inoculants, particularly in developing nations. The heightened attention towards PGP applications underscores the importance of advancing sustainable agricultural practices.