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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 2018 - IJCMAS--ICV 2018: 95.39 For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2018: 95.39
For more details click here

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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 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(1): 223-231
DOI: http://dx.doi.org/10.20546/ijcmas.2017.601.027


The Biological Control Bacteria Pseudomonas fluorescens Inhibits Free Nitrogen Fixing Bacteria in the Rhizosphere
Abo-baker Abd-Elmoniem Abo–baker Basha1* and Rafat Khalaphallah2
1Soils and Water Science, Dept., Fac. Agric., South Valley University, Egypt
2Agriculture botany (Microbiology) Dept., Fac. Agric., South Valley University, Egypt
*Corresponding author
Abstract:

The present study was conducted in the laboratory and green house to explore the relation between Pseudomonas fluorescens as biocontrol agent and free N-fixers Azotobacter chroococcum and Azospirillum lipoferium bacteria and their effect on their population in rhizosphere, growth, N% in shoot and N content of wheat plants grown in sterilized and unsterilized sandy soil. Results revealed that P. fluorescens interacted negatively with the population of both nitrogen fixing bacteria in wheat rhizosphere and studied plant parameters. Results showed that decreased in A. chroococccum counts in wheat rhizosphere of sterilized soil reached to 93.79% compared to A. chroococccum count in single, while decrease was reached to 82.1 % in unsterilized soil. Also, data obtained showed that in sterilized soil; mixing of P. fluoresences with A. lipoferum caused highly significant lowering in population of A. lipoferum reached to 97.87 %, and by 91.53 % in unsterilized soil comparing with A. lipoferum inoculated singly. According to these results, it is necessary to separate these non-compatible types of bacteria, when added to the soil or seeds to avoid this antagonistic effect between biocontrol bacteria and introduced or indigenous microorganisms and select the compatible organisms in mixed biofertilizer inoculants.


Keywords: N2 fixation, A.chroococcum,lipoferum, fluorescens, ineraction, antagonistic effect.
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How to cite this article:

Abo-baker Abd-Elmoniem Abo–baker Basha and Rafat Khalaphallah. 2017. The Biological Control Bacteria Pseudomonas fluorescens Inhibits Free Nitrogen Fixing Bacteria in the Rhizosphere.Int.J.Curr.Microbiol.App.Sci. 6(1): 223-231. doi: http://dx.doi.org/10.20546/ijcmas.2017.601.027