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Plant growth-Promoting Rhizobacterial Biofertilizers for Quality Crop Production and Soil Health Sustenance

Recent decades have witnessed increased agricultural production to match the global demand for food fueled by population increase. Conventional agricultural practices are heavily reliant on artificial fertilizers that have numerous environmental and human health effects. Cognizant of this, sustainability researchers and environmentalists have increased their focus on other crop fertilization mechanisms. The exploitation of plant microbiomes has particularly gathered surmountable interest in this regard. Among the most interesting plant microbiomes are the plant growth-promoting rhizobacteria (PGPR). Biofertilizers are microbial formulations of Plant growth promoting rhizobacteria (PGPR) which shows an important role in the sustainable agriculture industry. Biofertilizers are constituted of indigenous plant growth-promoting rhizobacteria that directly or indirectly promotes plant growth and soil fertility through the solubilization of soil nutrients, nitrogen (N2) fixation, suppression of plant diseases and the production of plant growth-stimulating hormones such as 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity, gibberellic acid, Indole 3- acetic acid (IAA) and siderophores. Moreover, PGPR not only help in plant growth but also help in soil health sustenance. Over the past centuries, technological revolutions have brought about new sources of soil and (ground)water pollution . The clean-up costs by conventional remediation methods are often exorbitantly high, retarding soil remediation if performed at all. Against these drawbacks, rhizoremediation which is an inexpensive and sustainable technology, based on the actions of biodegradative microorganisms in the rhizosphere and the plant phytoremediation capacity, has gained increased attention.