SCREENING OF FLUORESCENT PSEUDOMONADS BACTERIA ISOLATED FROM RHIZOSPHERES OF CULTIVATED AND WILD PLANTS IN VITRO FOR PLANT GROWTH PROMOTING TRAITS | ||||
| Journal of Plant Production | ||||
| Article 4, Volume 33, Issue 5, May 2008, Page 3365-3383 PDF (612.91 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2008.166391 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| H. Gamal-Eldin; M. Elbadry; S. Mahfouz; S. A. Abdelaziz | ||||
| Department of Agricultural Microbiology, Faculty of Agriculture, Fayoum University, Fayoum, Egypt | ||||
| Abstract | ||||
| Utilization of fluorescent pseudomonads bacteria (FPB) as plant growth promoting agents offers a promising alternative solution to the application of potential harmful agrochemicals. In this study, FPB inhabiting ectorhizosphere and endorhizosphere of different cultivated and wild plants species were enumerated. Rhizospheres of wild plants, in general, were found to harbor high FPB population density compared to rhizospheres of cultivated plants. From counting plates, ninety five FPB isolates representing different morphological types were obtained. The isolates were in vitro screened for activities related to plant nutrition and plant growth regulation, for antifungal traits and for antagonistic potential towards different phytopathogenic fungi. Results showed that varied proportions of the FPB isolates are putative nitrogen fixers, solubilize phosphate and zinc, produce indoleacetic acid, produce varies antifungal traits and inhibit phytopathogenic fungi. Based on the results of screening, isolates were assessed for their ability to function as plant growth promoting rhizobacteria (PGPR) and ranked. Among the top 20 FPB isolates, 8 were isolated from rhizosphere of Rotrait (Zygophyllum coccineum), 6 from Kokia (Spergularia marina L.), 3 from Akol (Alhagi graecorum, boiss), and 3 from Maize (Zea mays L.) plant. | ||||
| Keywords | ||||
| fluorescent pseudomonads bacteria; cultivated and wild plants; ectorhizosphere and endorhizosphere; PGPR traits | ||||
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