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Plant Growth Promoting Rhizobacteria in Nutrient Enrichment: Current Perspectives

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Biofortification of Food Crops

Abstract

The intensive application of chemical fertilizers to meet the growing demand of food for burgeoning population has led to an unprecedented perturbation of the soil environment. Environment degradation has had serious impacts on the nutrient use efficiency by the soil crop plants owing to irrational use of chemical fertilizers, thus warranting prioritization of the beneficial soil microorganisms for improving the soil health. Rhizosphere supports huge diversity of microbial community including beneficial plant growth promoting rhizobacteria (PGPR) as primary determinants of plant health and soil fertility. PGPR colonize roots of dicots and monocots and improve plant growth either by assisting nutrient acquisition (N, P, and essential nutrients) or modulating root system architecture by releasing phytohormones (direct effect) or reducing detrimental effects of various biotic and abiotic stress (indirect effect). The abilities of PGPR are of immense importance in sustainable agriculture in terms of improving crop production and soil health, therefore declining the negative effect of inorganic fertilizers on the environment. This chapter is an effort to illuminate the prevailing scenario on underlying mechanisms of nutrient management by PGPR. It is vital that soil microbiologists and agronomists pay due attention to strategies for nutrient management for enhancing crop production in a sustainable manner.

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  1. Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab, 141 004, India

    Poonam Sharma & Sabhjeet Kaur

  2. Department of Microbiology, Punjab Agricultural University, Ludhiana, Punjab, 141 004, India

    K. C. Kumawat

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  1. Poonam Sharma
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  1. Division of Crop Production, Indian Institute of Pulses Research, kanpur, Uttar Pradesh, India

    Ummed Singh

  2. Division of Crop Production, ICAR-Indian Institute of Pulses Research, Kanpur, India

    C S Praharaj

  3. Division of Crop Production, ICAR-Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, India

    S S Singh

  4. ICAR-Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, India

    N P Singh

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Sharma, P., Kumawat, K.C., Kaur, S. (2016). Plant Growth Promoting Rhizobacteria in Nutrient Enrichment: Current Perspectives. In: Singh, U., Praharaj, C., Singh, S., Singh, N. (eds) Biofortification of Food Crops. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2716-8_20

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