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Microbiome Under Changing Climate
2022, 257-269

Role of endophytic plant growth-promoting rhizobacteria bacteria in sustaining plant health under changing climate

Neetu Singh1, Archana Singh2, Praveen Dahiya3

Amity Centre for Biocontrol and Plant Disease Management, Amity University Uttar Pradesh, Noida, India.

Abstract

The ever-increasing population and changing climate are considered to be the major challenges for both growers and scientists for the last three decades. The world population is expected to increase 9.5 billion by the year 2050 which will exert pressure on food demands more than 50% extra in comparison to the present consumption and finally extra pressure is on the growers and soil for achieving the supply. From the last two decades, plant growth-promoting rhizobacteria (PGPR) are in the forefront in improving plant health by various mechanisms including production of growth hormones, accessibility of essential minerals through solubilization, the reduction of the plant damage by induced systemic resistance under biotic/abiotic stress of changing environment which are characterized by suboptimal growing conditions, for example, low or high temperatures, soil pH, drought, water and paucity of nutrients. The positive function of PGPR bacteria is highly appealing, as global agriculture is facing issues because of the drastic climate change. Therefore this chapter includes the interaction studies between PGPR and plants under biotic/biotic stress. This chapter is focusing toward the most broadly used endophytes, Pseudomonas and Bacillus species available within the plant tissue and rhizosphere as well. Furthermore, strategies are discussed to improve colonization by PGPR bacterial inoculants under field conditions.

Keywords: Plant growth-promoting rhizobacteria (PGPR), Pseudomonas sp, Bacillus sp, abiotic stress, biotic stress, rhizosphere.

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