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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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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 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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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(11): 2065-2078
DOI: https://doi.org/10.20546/ijcmas.2017.611.244


Functional Attributes of Psychrotolerant Rhizobacteria from Wheat (Triticum aestivum L.) Rhizoshpere
Aamni Singh1 and Veena Khanna2*
1Department of Microbiology, Punjab Agricultural University, Ludhiana – 141001, Punjab, India
2Department of Plant Breeding and Genetics, Punjab Agricultural University,Ludhiana - 141001 Punjab, India
*Corresponding author
Abstract:

Cold-tolerant PGPRs are known to improve plant growth and nutrient uptake by an array of mechanisms, under stress and nutrient imbalance conditions. On the basis of growth potential we selected 43 PGPRs from pool of 85 rhizobacterial isolates obtained from wheat rhizospheric soil collected from different wheat growing fields. Phosphate and zinc solubilization efficiency along with phytohormones and siderophore producing ability at 10 and 20°C was also assessed. Rhizobacterial isolates A-43, A-13, A-12, A-36, A-25, A-22 and A-34 was potent phosphate and zinc solubilizers. IAA production was estimated in the range from 2.12 to 43.24 μg/ml and 2.40 to 68.36 μg/ml in the presence of tryptophan at 10 and 20°C respectively. Maximum GA production was recorded with A-43, A-13, A-12 and A-25 at 10 and 20°C. Similarly highest siderophore production was shown by bacterial culture A-6 (250.4 µg/ml and 90.5 µg/ml) and A-43 (225.9 µg/ml and 80.6 µg/ml) at both temperatures. Also, isolates A-43, A-36, A-13 and A-12 were resistant to many antibiotics like ampicillin (25 g/disc), tetracycline (10 g/disc), streptomycin (10 g/disc) etc. These four potent rhizobacterial isolates improved germination, root and shoot length and fresh weight of wheat seedlings as compared to uninoculated control under axenic conditions.


Keywords: PGPR, Rhizobacteria, Wheat, Zinc solubilizers.
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How to cite this article:

Aamni Singh and Veena Khanna. 2017. Functional Attributes of Psychrotolerant Rhizobacteria from Wheat (Triticum aestivum L.) Rhizoshpere.Int.J.Curr.Microbiol.App.Sci. 6(11): 2065-2078. doi: https://doi.org/10.20546/ijcmas.2017.611.244