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Ramteke, Pramod W.
- In Vitro Screening of Plant Growth Promoting Rhizobacteria to Control Bacterial Wilt (Ralstonia solanacearum) of Tomato (Lycopersicon esculentum)
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1 Department of Biological Sciences, Sam Higginbottom Institute of Agriculture, Technology and Sciences, Allahabad (U.P.), IN
1 Department of Biological Sciences, Sam Higginbottom Institute of Agriculture, Technology and Sciences, Allahabad (U.P.), IN
Source
International Journal of Plant Sciences, Vol 11, No 2 (2016), Pagination: 224-227Abstract
Ralstonia solanacearum is the causative agent of bacterial wilt that causes considerable damages in the yield of various crop plants. The intent of the study was to evaluate potential of bacterial antagonists to suppress bacterial wilt disease development and evaluate the role of the strains as plant growth-promoting rhizobacteria (PGPR) in tomato. One hundred rhizosphere bacterial isolates were screened against virulent strain of Ralstonia solanacearum. After in vitro screening 10 antagonistic strains designated PR3, PR17, PR26, 1NAB15, 1NAB20, 3NAA1, 3NAA2, 2CBA2, 2CBA4, 2CBA18 showed antagonistic effect by producing inhibition zone supressing the growth of R. Solanacearum. The isolate PR3 showed the highest inhibition zone measuring 33.3mm whereas 1NAB15 showed the lowest zone measuring 10mm. The present study, therefore, suggests that the use of PGPR isolates which showed the antagonistic activity can be used as inoculants/ bioantagonists might be beneficial for the control of bacterial wilt of tomato in field studies.Keywords
Ralstonia solanacearum, PGPR, Bacterial Wilt, Tomato.References
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- Light-Regulatory Effect on the Phytosynthesis of Silver Nanoparticles Using Aqueous Extract of Garlic (Allium sativum) and Onion (Allium cepa) Bulb
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Authors
Affiliations
1 Department of Molecular and Cellular Engineering, Jacob School of Biotechnology and Bioengineering, Sam Higginbottom Institute of Agriculture, Technology and Sciences (Deemed to be University), Allahabad 211 007, IN
2 Department of Biological Sciences, School of Basic Sciences, Sam Higginbottom Institute of Agriculture, Technology and Sciences (Deemed to be University), Allahabad 211 007, IN
1 Department of Molecular and Cellular Engineering, Jacob School of Biotechnology and Bioengineering, Sam Higginbottom Institute of Agriculture, Technology and Sciences (Deemed to be University), Allahabad 211 007, IN
2 Department of Biological Sciences, School of Basic Sciences, Sam Higginbottom Institute of Agriculture, Technology and Sciences (Deemed to be University), Allahabad 211 007, IN
Source
Current Science, Vol 111, No 8 (2016), Pagination: 1364-1368Abstract
Green synthesis emerged as an exciting approach in the field of nanotechnology. Biogenesis of nanosilver is simple, eco-friendly, safe and cost-efficacious and therefore gaining impetus nowadays. An effort has been made to understand the possible induced mechanism for the biosynthesis of silver nanoparticles by exposing a mixture of 1 mM AgNO3 with aqueous extracts of garlic (Allium sativum) and onion (Allium cepa) under light and dark conditions. In the synthesis of silver nanoparticles, components of garlic and onion bulb extract served both as capping and reducing agents, whereas the light acted as catalyst. Green synthesized silver nanoparticles were quantified spectrophotometrically at different time intervals. Scanning electron microscopy confirmed that biosynthesized nanoparticles were polydispersed, spherical in shape and under the size range of 100 nm. Light proved to be an stimulating factor in the green synthesis of silver nanoparticles which may vary from species to species.Keywords
Garlic Bulb, Green Synthesis, Light Effect, Onion Bulb, Silver Nanoparticles.References
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