Effect of Plant Growth Promoting Rhizobacteria (PGPR) on Archis Hypogaea under Salt Stress Condition

Abstract

The applications of naturally occurring plant growth regulating microorganisms present in the halophytes plant root system can be explored to identify salt-resistant strategies and future crop advancement. The present research was designed to demonstrate the growth enhancement parameters and capabilities of salt stress-tolerant plant growth-promoting rhizobacteria (PGPR); like Agrobacterium species, Klebsiella species, Ochrobactum species, Pseudomonas species, and Azospirillum species in understanding the unfavorable effects of salinity stress on groundnut (Arachis hypogaea) seedlings. Effects of the above-mentioned halo-tolerant PGPRs on germination and development of groundnut variety Girnar-II was observed under induced salt stress up to 8 dS m-1. The addition of PGPRs positively influenced the growth and germination rate of Arachis hypogaea seedlings, total height comprising root and shoot length, sugars, and antioxidant activity. Plantlets treated with Pseudomonas and Agrobacterium species showed increased plant nutrient concentrations with respected control plants. According to preliminary findings, these PGPR strains appear to be promising candidates for improving crop yield in salt-stressed agricultural systems. However, more research validation is required before acting forward with large-scale applications.