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Prof. Rasha Mohamed Moustafa El-Meihy :: Publications:

Title:
Optimal Environmental Conditions for Production of Plant Growth Regulators by Rizobacteria
Authors: A.Gh. Rahal, R.A. Zaghloul, N.A. Neweigy, Ehsan A. Hanafy and Rasha M. El-Meihy
Year: 2010
Keywords: Plant growth promoting rhizobacteria, Auxins, Gibberellic acid, Cytokinins, A. chroococcum, B. megaterium var. phosphaticum, Incubation temperature, Fermentation period.
Journal: Egypt. J. Microbiol. Special Issue
Volume: Not Available
Issue: Not Available
Pages: 33-44
Publisher: Not Available
Local/International: International
Paper Link: Not Available
Full paper Rasha Mohamed Mostafa El-Meihy_Rashed Abdel-Fatah Mohamed Zaghloul_Rashed 33.pdf
Supplementary materials Not Available
Abstract:

this study was carried out to isolate and identify some plant growth promoting rhizobacteria (PGPR). The optimum incubation condition, i.e. temperature and fermentation period, for plant growth regulators (PGRs) production were limited. Obtained data revealed that rhizosphere of cereal crops showed higher PGPR isolates compared to rhizosphere of other crops. Among the examined isolates, fifteen were highly efficient for auxins production. The most potent isolates for indoles production were chosen and these isolates were identified as Azotobacter chroococcum (R19) and Bacillus megaterium var. phosphaticum (R44). The optimum incubation temperature for highest production of auxins, gibberellic acid (GA3) and cytokinins were 32 and 30°C for A. chroococcum and B. megaterium var. phosphaticum , respectively. In addition, the highest production of these phytohormones were obtained by the two strains after four and two days fermentation period, respectively.

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