Rhizosphere fungal and bacterial community can harbor beneficial organisms known as PGPM. These organisms have the ability to colonize plant roots providing benefits to their hosts, by modulating the production of phytohormones, increasing the availability of soil nutrients, and the resistance against pathogens. Beneficial microorganisms include those that create symbiotic associations with plant roots (rhizobia, mycorrhizal fungi, actinomycetes, diazotrophic bacteria), promote nutrient mineralization and availability, produce plant growth hormones, and are antagonists of plant pests, parasites or diseases (biocontrol agents). Microorganisms play an important role in the nutrient cycle. Some bacteria secrete phytochemicals and organic acids that are helpful in the growth and development of plants. Microorganisms help maintain soil pH but balance nutrients and minerals.

Beneficial microorganisms include those that create symbiotic associations with plant roots promote nutrient mineralization and availability, produce plant growth hormones, and are antagonists of plant pests, parasites or diseases. Rhizobacteria and mycorrhizae organisms can help improve stress tolerance by enhancing plant growth; stimulating the production of phytohormones, siderophores, and solubilizing phosphates; lowering ethylene levels; and up regulating the expression of dehydration response and antioxidant. The beneficial influences of microorganisms on plant growth include nitrogen fixation, acquisition and uptake of major nutrients, promotion of shoot and root growth, disease control or suppression and improved soil structure. Probiotics are live bacteria that are good for us, that balance our good and bad intestinal bacteria, and that aid in digestion of food and help with digestive problems, such as diarrhea and bellyache. Bacteria that are examples of probiotics are Lactobacilli and Bifidobacterium. Microorganisms play an important role in the nutrient cycle. Some bacteria (Plant Growth Promoting Bacteria) secrete phytochemicals and organic acids that are helpful in the growth and development of plants. Microorganisms help maintain soil pH but balance nutrients and minerals. Within food plant cropping systems, microorganisms provide vital functions and ecosystem services, such as biological pest and disease control, promotion of plant growth and crop quality, and biodegradation of organic matter and pollutants.

Rhizosphere fungal and bacterial community can harbor beneficial organisms known as PGPM. These organisms have the ability to colonize plant roots providing benefits to their hosts, by modulating the production of phytohormones, increasing the availability of soil nutrients.

I agree with Kavana G.B that within food plant cropping systems, microorganisms provide vital functions and ecosystem services, such as biological pest and disease control, promotion of plant growth and crop quality, and biodegradation of organic matter and pollutants. Microorganisms play an important role in the nutrient cycle. Some bacteria (Plant Growth Promoting Bacteria) secrete phytochemicals and organic acids that are helpful in the growth and development of plants. Microorganisms help maintain soil pH but balance nutrients and minerals. Beneficial microorganisms include those that create symbiotic associations with plant roots (rhizobia, mycorrhizal fungi, actinomycetes, diazotrophic bacteria), promote nutrient mineralization and availability, produce plant growth hormones, and are antagonists of plant pests, parasites or diseases. Plant microbiomes are agriculturally important bioresources for agriculture as beneficial microbes may enhance plant growth and improve plant nutrition uptake through solubilization of P, K, and Zn, nitrogen fixation, and other mechanisms including siderophore production [microbe-mediated biofortification. Microorganisms have the potential to improve plant growth under abiotic stress conditions by promoting the production of low-molecular-weight osmolytes, such as glycinebetaine, proline, and other amino acids, mineral phosphate solubilization, nitrogen fixation, organic acids, and producing key enzymes.

Beneficial soil microorganisms viz. Bacteria, fungi and actinomycete and blue green algae are playing important vital role in transformation of the nutrient pool of the soil following decomposition of the organic matter, release of available form of the nutrients (via mineralisation) and making the soil fertile, healthy and productive.... Improvement of soil physical chemical and biological properties are thus providing every desired conditions for better plant growth and development by ensuring good water use, efficient functioning of the nutrition and many aspects supporting productivity..

Dr Himanshu Verma thank you for your contribution to the discussion

Microbes can make nutrients and minerals in the soil available to plants, produce hormones that spur growth, stimulate the plant immune system and trigger or dampen stress responses. In general a more diverse soil microbiome results in fewer plant diseases and higher yield. Within food plant cropping systems, microorganisms provide vital functions and ecosystem services, such as biological pest and disease control, promotion of plant growth and crop quality, and biodegradation of organic matter and pollutants.Plant microbiomes are agriculturally important bioresources for agriculture as beneficial microbes may enhance plant growth and improve plant nutrition uptake through solubilization of P, K, and Zn, nitrogen fixation, and other mechanisms including siderophore production. Microorganisms have the potential to improve plant growth under abiotic stress conditions by promoting the production of low-molecular-weight osmolytes, such as glycinebetaine, proline, and other amino acids, mineral phosphate solubilization, nitrogen fixation, organic acids, and producing key enzymes. Soil microorganisms are responsible for most of the nutrient release from organic matter. When microorganisms decompose organic matter, they use the carbon and nutrients in the organic matter for their own growth. They release excess nutrients into the soil where they can be taken up by plants. Beneficial microbes improve plant growth by enhancing the availability of nutrients, the regulation of phytohormones, and increasing plant tolerance against stresses. PGPM act as biofertilizer, increasing macro and micronutrient availability. Two types of beneficial microorganisms, mycorrhizal fungi and nitrogen-fixing bacteria, are considered beneficial to plant health. Mycorrhizal fungi and nitrogen-fixing bacteria are called "microsymbionts" because they form a symbiotic (mutually beneficial) relationship with plants. In agriculture, the main groups are: rhizobacteria, mycorrhizae and trichodermas. Among their main agricultural applications are the fixation of atmospheric nitrogen and the solubilisation of poorly available nutrient sources.