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.2017.6(12): 3500-3518
DOI: https://doi.org/10.20546/ijcmas.2017.612.408


Functional Diversity of Soil Bacteria from Organic Agro Ecosystem
Alka Sagar1, Victor Debbarma2, Thomas Abraham2, Pradeep K. Shukla3 and Pramod W. Ramteke3*
1Department of Industrial Microbiology
2Department of Agronomy
3Department of Biological Sciences, Sam Higginbottom University of Agriculture, Technology and Sciences,Allahabad 211007, India
*Corresponding author
Abstract:

Organic farming is an eco-friendly agro ecosystem that helps maintain soil health in terms of biological fertility and productivity and bacterial communities in soil play an essential role. A Model Organic Farm (MOF), developed in 2002 to demonstrate organic farming modules among the farming community, is utilized to study bacterial composition, diversity, seasonal variations, and plant growth promotion (PGP) traits of the soil. We observe rich bacterial diversity in MOF soil in terms of types and PGP traits. Rich bacterial diversity in MOF soil is represented by heterotrophs, coliforms, Pseudomonas spp., Azotobacter spp. and Rhizobium spp. and majority of these microorganisms display multiple PGP traits. Bacterial isolates are predominately positive to production of ammonia (NH3) (93.2%), indole acetic acid (IAA) (89.6), catalase (85.0), 1-aminocyclopropane- 1-carboxylate deaminase (ACCD) (78.6%) and siderophore (69.0%). Richness of their functional characteristics is further revealed by tolerance to salinity and wide range of pH. All the isolates are tolerant to > 5 % NaCl and wide range of pH. Furthermore, majority (96-97%) of the bacterial population of nitrogen fixers are Azotobacter spp. and Rhizobium spp. with multiple PGP traits, tolerance to salinity and wide range of pH. The present study demonstrates that organic farming enriches soil fertility and biodiversity, as well as, less dependent on external high inputs. Thus organic farming offers promise of achieving ecological, economic and social stability in food production system.


Keywords: Organic farming, Bacterial diversity, PGP traits, Salinity tolerance, pH tolerance.
Download this article as Download

How to cite this article:

Alka Sagar, Victor Debbarma, Thomas Abraham, Pradeep K. Shukla and Pramod W. Ramteke. 2017. Functional Diversity of Soil Bacteria from Organic Agro Ecosystem.Int.J.Curr.Microbiol.App.Sci. 6(12): 3500-3518. doi: https://doi.org/10.20546/ijcmas.2017.612.408