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BACKGROUND The deficiency of mineral elements is a limiting factor for crop production worldwide and is a setback for production of one of the major cereal crop, Rice ( Oryza sativa L .) To address the problem of nutrient deficiency, an alarming increase of chemical fertilizers usage has been observed that often give rise to several health and environmental issues. To avoid disproportionate usage of chemicals in agriculture, an alternative eco-friendly strategy is required to improve soil fertility, and enhance crop productivity. OBJECTIVE T he present study demonstrates the role of plant beneficial rhizobacteria viz., Paenibacillus lentimorbus B-30488, Bacillus amyloliquefaciens SN13, and their consortium in rice (Oryza sativa L. var. IR-36) facing nutrient deprivation. . MATERIAL AND METHODS Biochemical and physiological assays like photosynthetic pigments, proline, soluble sugar, root length, shoot length, biomass, electrolyte leakage, etc . Nutrient and metabolic profiling Gene expression analysis.

Image of Fig. 1. RESULTS. Effect of PGPR inoculation in proline content (A) and total soluble sugars (B) in rice seedlings..

Image of Fig. 4. Effect of PGPR inoculation on different antioxidant enzymes (APX, GPX, CAT, and SOD) in rice seedlings.

Image of Fig. 5. Effect of PGPR inoculation on macro–micro nutrients transport and accumulation under nutrient sufficient and deficient conditions ..

Image of Fig. 9. Changes inmetabolites of themetabolic pathways in rice seedlings subjected to nutrient sufficient (NS) and deficient conditions (ND) and inoculated with different PGPR treatments.

CONCLUSION AND FUTURE PERSPECTIVE From the present study, it can be concluded that plant-PGPR interactions are host and environment specific, which eventually influences molecular and metabolic paradigms in host plant. It would be alluring to speculate that during nutrient starvation PGPR SN13 not only improves seedling health but also target carbohydrate metabolism which in turn induces downstream signalling that enables plants to withstand stress. Our findings facilitate the understanding of the mechanism involved in PGPR induced tolerance to nutrient limitation in rice and provide an important reference for deeper investigation in this field of research ..