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Indian Journal of Experimental Biology (IJEB) >
IJEB Vol.50 [2012] >
IJEB Vol.50(08) [August 2012] >
| Title: | A promising strain of Streptomyces sp. with agricultural traits for growth promotion and disease management |
| Authors: | Alam, Mansoor
Dharni, Seema
Abdul-Khaliq
Srivastava, Santosh Kumar
Samad, Abdul
Gupta, Mahesh Kumar |
| Keywords: | Geranium
Phytopathogenic fungi
Streptomyces sp. CIMAP-A1
S. vinacendrappus |
| Issue Date: | Aug-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A bacterial strain, Streptomyces sp. CIMAP- A1 was isolated from Geranium
rhizosphere and identified by morphological, physiological, biochemical and
molecular characters (16S rDNA gene sequence). Phylogenetically, it was found
most closely related to S.
vinacendrappus, strain NRRL-2363 with 99% sequence similarity. The strain
had potential antagonistic activity (in vitro)
against wide range of phytopathogenic fungi like Stemphylium sp., Botrytis cinerea, Sclerotinia sclerotiorum,
Colletotrichum spp., Curvularia spp., Corynespora cassicola and Thielavia basicola. The extracellular secondary metabolites
produced by the strain in the culture filtrates significantly inhibited the
spore germination, growth of germ tube of the germinated spores and radial
growth of Alternaria alternata,
Colletotrichum acutatum, Curvularia andropogonis and Fusarium moniliforme. The extraction of culture filtrate with
solvents and purification by following VLC and PTLC methods always yielded a 10th
fraction antifungal compound showing activity against wide range of
phytopathogenic fungi. The strain was able to produce siderophores and
indole-3-acetic acid. The strain was found to enhance the growth and
biomass production of Geranium. It increased 11.3% fresh shoot biomass of
Geranium and 21.7% essential oil yield.
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| Page(s): | 559-568 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1009 (Online); 0019-5189 (Print) |
| Source: | IJEB Vol.50(08) [August 2012]
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