

Screening of plant growth hormone producing microorganisms

Author Affiliations

  • 1Department of Zoology, S. B College, Changanassery-686101, Kerala, India and TIES, Ecological Research Campus, K.K.Road, Vellore P.O., Kottayam-686 501, Kerala, India and Abad food servics, Abad Fisheries Pvt. Ltd, Kochangadi, Chullickal, Kochi-682202, Kerala, India
  • 2Department of Zoology, S. B College, Changanassery-686101, Kerala, India
  • 3TIES, Ecological Research Campus, K.K.Road, Vellore P.O., Kottayam-686 501, Kerala, India
  • 5Eben-Ezer Degree College, Eben-Ezer Group of Institutions, No.19, Hennur-Bangalur Main Road, Bangalore, Karnataka, India

Int. Res. J. Biological Sci., Volume 8, Issue (2), Pages 1-5, February,10 (2019)


A study was conducted to determine the Plant growth promoting rhizobacteria (PGPR). This study was focusedto isolate the Plant growth promoting bacteria (PGPB)such as Azotobacter spp, Pseudomonas spp, Rhizobium spp, and Phosphate solublizing bacteria from various samples. In this study, microorganisms were isolated from rhizospheric soil, non-rhizospheric soil and from the root nodules of leguminous plants.From the present study we can conclude that rhizosphere, non-rhizosphere and root nodular bacteria are able to produce Indole Acetic Acid (IAA), Gibberellic Acid (GA), Ammonia and Siderophore. All the four species of microorganisms were capable of producing phytohormones such as IAA, GA and growth promoting substances like Siderophore and Ammonia are able solublize phosphate in varied concentrations.


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