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| Content Provider | Springer Nature Link |
|---|---|
| Author | Ramadasappa, Srinivasamurthy Rai, Ashwani K. Jaat, Ranjeet Singh Singh, Aqbal Rai, Rhitu |
| Copyright Year | 2011 |
| Abstract | Tomato (Lycopersicon esculentum) is important widely grown vegetable in India and its productivity is affected by bacterial wilt disease infection caused by Ralstonia solanacearum. To prevent this disease infection a study was conducted to isolate and screen effective plant growth promoting rhizobacteria (PGPR) antagonistic to R. solanacearum. A total 297 antagonistic bacteria were isolated through dual culture inoculation technique, out of which forty-two antagonistic bacteria were found positive for phlD gene by PCR amplification using two primer sets Phl2a:Phl2b and B2BF:BPR4. The genetic diversity of phlD $^{+}$ bacteria was studied by amplified 16S rDNA restriction analysis and demonstrated eleven groups at 65% similarity level. Out of these 42 phlD $^{+}$ antagonistic isolates, twenty exhibited significantly fair plant growth promoting activities like phosphate solubilization (0.92–5.33%), 25 produced indole acetic acid (1.63–7.78 μg ml$^{−1}$) and few strains show production of antifungal metabolites (HCN and siderophore). The screening of PGPR (phlD $^{+}$) for suppression of bacterial wilt disease in glass house conditions was showed ten isolated phlD $^{+}$ bacteria were able to suppress infection of bacterial wilt disease in tomato plant (var. Arka vikas) in the presence R. solanacearum. The PGPR (phlD $^{+}$) isolates s188, s215 and s288 was observed to be effective plant growth promoter as it shows highest dry weight per plant (3.86, 3.85 and 3.69 g plant$^{−1}$ respectively). The complete absence of wilt disease symptoms in tomato crop plants was observed by these treatments compared to negative control. Therefore inoculation of tomato plant with phlD $^{+}$ isolate s188 and other similar biocontrol agents may prove to be a positive strategy for checking wilt disease and thus improving plant vigor. |
| Starting Page | 1681 |
| Ending Page | 1690 |
| Page Count | 10 |
| File Format | |
| ISSN | 09593993 |
| Journal | World Journal of Microbiology and Biotechnology |
| Volume Number | 28 |
| Issue Number | 4 |
| e-ISSN | 15730972 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2011-12-14 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | PGPR Antagonistic phlD Ralstonia solanacearum Bacterial wilt Tomato Microbiology Biotechnology Environmental Engineering/Biotechnology Biochemistry Applied Microbiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Medicine Applied Microbiology and Biotechnology Biotechnology |
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