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http://dx.doi.org/10.5338/KJEA.2006.25.3.228

Effect of Chemical Fertilizer-adaptive Variants, Pseudomonas aeruginosa GRC2 and Azotobacter chroococcum AC1, on Macrophomina phaseolina Causing Charcoal Rot of Brassica juncea  

Joshi, Kishore Kumar (Department of Botany and Microbiology, Gurukul Kangri University)
Kumar, Varun (Department of Botany and Microbiology, Gurukul Kangri University)
Dubey, Ramesh Chand (Department of Botany and Microbiology, Gurukul Kangri University)
Maheshwari, Dinesh Kumar (Department of Botany and Microbiology, Gurukul Kangri University)
Bajpai, Vivek K. (Department of Biotechnology, Daegu University)
Kang, Sun-Chul (Department of Biotechnology, Daegu University)
Publication Information
Korean Journal of Environmental Agriculture / v.25, no.3, 2006 , pp. 228-235 More about this Journal
Abstract
Pseudomonas aeruginosa $GRC_2$, siderophore-producing strain, inhibited growth of Macrophomina phaseolina in vitro and reduced charcoal rot in seeds of Brassica juncea in field when coated with adaptive strains. P. aeruginosa $GRC_2$ and Azotobacter chroococcum $AC_1$ produced indole-3-acetic acid and solubilized insoluble phosphate. A. chroococcum $AC_1$ fixed nitrogen asymbiotically. Urea and diammonium phosphateadaptive variant strains of P. aeruginosa and A. chroococcum strongly inhibited M. phaseolina in comparison to parental strains. Bacterization of seeds induced seed germination, seedling growth, and enhanced yield of B. juncea by 10.87% as compared to full doses of urea and diammonium phosphate. Both adaptive strains of chemical fertilizers aggressively colonized roots, showing effectiveness to growth and developments of B. juncea.
Keywords
bioinoculants; urea; diammonium phosphate; Brassica juncea; Macrophomina phaseolina;
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