Plant Growth-Promoting Rhizobacteria (PGPR): Approaches to Alleviate Abiotic Stresses for Enhancement of Growth and Development of Medicinal Plants

Plants are constantly exposed to both biotic and abiotic stresses which limit their growth development reduce productivity. In order tolerate them, plants initiate a multitude of stress-specific responses modulate different physiological, molecular cellular mechanisms. However, many times the natural methods employed by for overcoming not sufficient require external assistance from rhizosphere. The microbial community in rhizosphere (known as rhizomicrobiome) undergoes intraspecific well interspecific interaction signaling. rhizomicrobiome, biostimulants, play pivotal role stimulating providing resilience against stress. Such rhizobacteria promote increase yield immunity known PGPR (plant promoting rhizobacteria). On basis contact, they classified into two categories, extracellular (in soil around root, root surface space) intracellular (nitrogen-fixing bacteria). They show effects on plant directly (i.e., absence pathogens) or indirectly. Generally, make niche concentrated form roots, latter exude several nutrients, such amino acids, lipids, proteins, etc. Rhizobacteria build special symbiotic relationship with section plant’s inner tissues. There free-living PGPRs potential work biofertilizers. Additionally, studies that can ameliorate effect help enhanced producing therapeutically important compounds. This review focuses various mechanisms mitigate medicinal enhance tolerance these stress conditions.