Isolation and characterization of potassium solubilizing bacteria from rhizospheric soil of onion

Authors

  • JASMIN. M. NADAF* and A.M. NAVALE

Keywords:

Insoluble mica, onion, Potassium solubilizing bacteria, potassium, solubilization

Abstract

Isolation of five KSB strains were carried out from root rhizosphere soil of onion on Aleksandrov’s media. The cells of all isolates were rod shaped and motile. Among them isolate-1, 2, 3 and 5 ranged from 0.8 × 2.2-2.8 µm in size formed circular colonies with entire margin, raised and moderate growth, where as isolate-4 was 1.5 × 5.0 µm in size, formed irregular colonies with undulate margin, raised elevation. Their biochemical characteristics observed that catalase test was +ve and H2S production test was -ve for all isolates. Test of oxidase, fluorescein production were -ve only for isolate 4, whereas +ve for remaining four isolates. After inoculation diameter of zone of K solubilization ranged from 9.50 to 12.58 mm in different isolates. Among all isolates isolate-3 showed maximum K solubilization 135 mg/l. It revealed that isolates belong to Pseudomonas spp. are the most efficient KSB under in vitro condition.

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Issue

Vol. 69 No. 4s (2016): Indian Phytopathology : Special Issue

Section

Research Articles

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How to Cite

A.M. NAVALE, J. M. N. and. (2016). Isolation and characterization of potassium solubilizing bacteria from rhizospheric soil of onion. Indian Phytopathology, 69(4s), 744-745. http://epubs.icar.org.in/ejournal/index.php/IPPJ/article/view/71439