Document Type: ORIGINAL RESEARCH PAPER

Authors

1 Department of Agricultural Microbiology, Agricultural and Biological Research Division, National Research Center, Egypt

2 Department of Agricultural Microbiology, Faculty of Agriculture, Cairo University, Egypt

Abstract

Chamomile is one of the most wide spread medicinal plant cultivated in Egypt. This work aimed at enhancement of blossoms and oil production of chamomile plants via biofertilization with PGPRs under organic farming system. In this study, 6 bacterial strains were applied using two different inoculation techniques. The first application method was throughout soaking the roots of seedlings in the bacterial suspension before transplanting. The second technique was by adding the bacterial inocula to soil 2 weeks after transplantation. The results showed that root dipping method displayed high impact on the yield of chamomile blossoms and essential oil percentage. Furthermore, the soil application of the bacterial inocula didn’t show any significant impact in this respect. Where Paenibacillus polymyxa, Bacillus subtilis, Serratia plymuthica and Streptomyces subrutilus increased the dry weight of chamomile blossoms compared to the control, essential oil content increased significantly in case of Serratia plymuthica, Stenotrophomonas rhizophyla and Bacillus subtilis. The current results also indicated that bacterial strains produced the highest indole-3-acetic acid and gibberellic acid resulted in the highest yield of both flowers and essential oil.

Graphical Abstract

Highlights

  • Improvement of chamomile plant production through biofertilization under organic farming system was evaluated;
  • Chamomile blossom and oil yield enhanced by submerging the seedlings root in the Plant growth promoting rhizobacteria suspension;
  • Bacterial strains producing phytohormones showed the positive impact on blossoms and oil yield.

Keywords

Main Subjects

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HOW TO CITE THIS ARTICLE

Mostafa, A.; Khalafallah, M.; Abo Sedera, S.; Fathy, F.; Higazy, A., (2019). Different methods of bacterial inoculation on the yield of chamomile blossoms and essential oil. Global J. Environ. Sci. Manage., 5(2): 237-248.


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