Follow
International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00 For more details click here
National Academy of Agricultural Sciences (NAAS) : NAAS Score: *5.38 (2019) [Effective from January 1, 2019]For more details click here

Login as a Reviewer

Indexed in



National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

See Guidelines to Authors
Current Issues

Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(12): 1177-1183
DOI: https://doi.org/10.20546/ijcmas.2018.712.146


Effect of Osmotic Stress on the Organic Acid Production Profile and Tricalcium Phosphate Solubilization by Osmotolerant Bacteria
Gurupadam Hema Bindu1, Govindan Selvakumar1*, Kaushal K. Upreti1, Narayana Sunil Kumarand Duraisamy Kalaivanan1
1ICAR- Indian Institute of Horticultural Research, Hesaraghatta Lake Post Bengaluru-560089, India
2 Gokaraju Rangaraju Institute of Engineering and Technology, Hyderabad, India
*Corresponding author
Abstract:

Osmotolerant Plant Growth Promoting Rhizobacteria (PGPR) plays an important role in plant growth promotion in water stressed environments. Since phosphate solubilisation is one of the major mechanisms of plant growth promotion under water stressed conditions, this study was conducted to determine the effect of osmotic stress on the organic acid production profile and phosphate solubilization abilities of twelve osmotolerant bacterial isolates in NBRIP medium supplemented with 25% PEG 8000 (-1.97 MPa). It was observed that the imposed level of osmotic stress did not significantly affect the production of citric, formic, 2-keto glutaric, lactic, malic, malonic propionic and tartaric acids. Most isolates were able to solubilize tricalcium phosphate more efficiently under in vitro osmotic stress conditions compared to normal conditions. The soluble P released from tri calcium phosphate by the isolates ranged from 2.78-25.22 ppm under non osmotic conditions, while it ranged from 4.67-53.56 ppm under osmotic stress conditions. Amongst the osmotolerant bacterial cultures, Bacillus amyloliquefaciens P-72 recorded significantly higher soluble P concentrations (53.56 ppm) under osmotic stress conditions while the isolate Enterobacter sp. P-39 recorded the lowest soluble P concentration (4.98 ppm).


Keywords: Osmotolerant, Organic acids, Phosphate solubilization Rhizobacteria
Download this article as Download

How to cite this article:

Gurupadam Hema Bindu, Govindan Selvakumar, Kaushal K. Upreti, Narayana Sunil Kumar and Duraisamy Kalaivanan. 2018. Effect of Osmotic Stress on the Organic Acid Production Profile and Tricalcium Phosphate Solubilization by Osmotolerant Bacteria.Int.J.Curr.Microbiol.App.Sci. 7(12): 1177-1183. doi: https://doi.org/10.20546/ijcmas.2018.712.146