Exploitation of Saline Tolerant Rhizobacteria for their Potential Saline Tolerant Traits and Plant Growth Promoting Activity under in vitro conditions

Author: Lohith Kumar N., Arati, Ameer Pasha B., Abhinandana K.R. and Krishna Naik L.

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Abstract

One of the major obstacles to improving agricultural output and quality has been salty soil. The symbiotic heterogeneous bacteria known as plant growth-promoting rhizobacteria (PGPR) are critical to the recycling of plant nutrients through phytostimulation and phytoremediation. There is need of exploitation of saline tolerant rhizobacterial strains to overcome the salinity stress. In the present study eight potential saline tolerant rhizobacteria which were showed tolerance upto 23% NaCl were further screened for saline tolerant traits and plant growth promoting activity under in-vitro saline conditions. The results revealed that among the isolates, Bacillus subtilis GAN-4 and Staphylococcus cohnii MAN-3 exhibited higher nutrient uptake and biofilm formation, and also recorded higher siderophore production, Proline production and Total phenol production compare to other isolates under in-vitro conditions. Hence, these saline tolerant rhizobacteria isolated from saline soil can be used to counteract the negative effects of saline stress on plants, with beneficial effects of physiological functions of plants such as growth and yield.

Keywords

Salinity tolerance, Rhizobacteria, in vitro conditions

Conclusion

Rhizobacteria that support plant growth under saline tolerant environments have developed a number of mechanisms to deal with salinity stress, including efflux systems, the production and accumulation of compatible solutes for regulating external osmotic pressure, the production of ROS, as well as other methods. There is still much more has to be discovered about how the saline tolerant rhizobacteria support themselves and their symbiotic partner during salinity stress, which has numerous negative effects on the cell. The present study on saline tolerant rhizobacteria demonstrates their enormous potential for improving the productivity of agro-ecosystems with salt concerns. To develop specialised bioformulations for saline soil systems, which are becoming more prevalent all over the world on a daily basis, in-depth studies targeting gene level expression and functional characteristics of saline tolerant rhizobacteria involved in plant growth promotion under salinity stress must be conducted in the near future.

References

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How to cite this article

Lohith Kumar N., Arati, Ameer Pasha B., Abhinandana K.R. and Krishna Naik L. (2023). Exploitation of Saline Tolerant Rhizobacteria for their Potential Saline Tolerant Traits and Plant Growth Promoting Activity under in vitro conditions. Biological Forum – An International Journal, 15(3): 85-90.