National Academy of Agricultural Sciences (NAAS)
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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 2018: 95.39 NAAS RATING 2020: 5.38 |
A total number of 10 rhizosperic bacteria were isolated from root environment of some healthy plants of a drastic diseased field with massive blighted symptoms of Trichosanthes dioica of Akilpur of Hooghly district, West Bengal (22.94º E 88.12º N) where soil is alluvial in nature. Among the isolates, one strain TR9 showed remarkable plant growth promoting activity. Cell free culture filtrate of TR9 produced clear zones of inhibition (diameter ranging from 1.67cm to 2.67cm) against different plant pathogenic fungi viz. Colletotrichum acutatum, Alternaria alternata and Helminthosporium compactum. It is quite capable of lowering the pH of its environment and also can solubilise insoluble phosphate sources. Siderophore production by this strain gives a positive result. Biochemical characterization indicated the ability of the strain to utilize a broad range of carbon sources, catalase positivity and also to reduce the nitrate and nitrite. It is highly sensitive to 4-quinolone derivative antibiotics viz. ciprofloxacin, norfloxacin and resistant to beta lactams like ampicilin, cephalothin, cephalexin. Light compound microscopy showed it to be a Gram negative rod shaped one which was re established by scanning electron microscopy. All these characteristic features indicate the strain to be a species of Burkholderia.
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