Journal
ANNALS OF MICROBIOLOGY
Volume 65, Issue 4, Pages 1885-1899Publisher
BMC
DOI: 10.1007/s13213-014-1027-4
Keywords
Epiphytic; Endophytic; Rhizospheric; Northern hills zone; K-solubilisation
Categories
Funding
- Division of Microbiology, Indian Agricultural Research Institute (IARI), New Delhi
- Department of Biotechnology (DBT), Ministry of Science and Technology
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The biodiversity of wheat-associated bacteria from the northern hills zone of India was deciphered. A total of 247 bacteria was isolated from five different sites. Analysis of these bacteria by amplified ribosomal DNA restriction analysis (ARDRA) using three restriction enzymes, AluI, MspI and HaeIII, led to the grouping of these isolates into 19-33 clusters for the different sites at 75 % similarity index. 16S rRNA gene based phylogenetic analysis revealed that 65 %, 26 %, 8 % and 1 % bacteria belonged to four phyla, namely Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes, respectively. Overall, 28 % of the total morphotypes belonged to Pseudomonas followed by Bacillus (2 0 %), Stenotrophomonas (9 %), Methylobacterium (8 %), Arthrobacter (7 %), Pantoea (4 %), Achromobacter, Acinetobacter, Exiguobacterium and Staphylococcus (3 %), Enterobacter, Providencia, Klebsiella and Leclercia (2 %), Brevundimonas, Flavobacterium, Kocuria, Kluyvera and Planococcus (1 %). Representative strains from each cluster were screened in vitro for plant growth promoting traits, which included solubilisation of phosphorus, potassium and zinc; production of ammonia, hydrogen cyanide, indole-3-acetic acid and siderophore; nitrogen fixation, 1-aminocyclopropane-1-carboxylate deaminase activity and biocontrol against Fusarium graminearum, Rhizoctonia solani and Macrophomina phaseolina. Cold-adapted isolates may have application as inoculants for plant growth promotion and biocontrol agents for crops growing under cold climatic conditions.
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