Microbes, the wonder organism of the world are known to play several essential roles in the environment such as nutrient cycling through weathering of rocks, degradation of the decay matter, functioning biogeochemical cycles and plant growth promotion. The beneficial microbes from diverse habitats have diverse applications in various sectors including medical, agriculture, and industries. In agriculture, microbes associated with plants and soil have been known to improve the host growth directly via availing the nutrients and plant growth regulators; and indirectly by protecting the plants from invaders like insects, and microbial pathogens. The microbes undergo various mechanisms to promote the plant growth including minerals solubilization. Solubilization is the process through which plant avails the soluble form of minerals like phosphorus (P), potassium (K), zinc (Zn), and selenium (Se) through insoluble form conversion using diverse mechanisms. The conversions of inslublie form into soluble form have been done soil and rhizospheric microbes by secreting of special compounds such as organic acid, exopolysaccharides and different enzymes. The use of mineral solubilizing microbes in the agricultural farms as biofertilizers could be play pivotal role in the plant growth promotion for agricultural as well as environmental sustainability.
Key words: Agricultural sustainability; crop improvements; mineralization; mobilization; plant growth promotion; solubilization
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