6th International Virtual Congress (IVC-2019) And Workshop.  International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

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
  • 4Department 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
  • 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.


  1. Hardoim P.R., Van Overbeek L.S., Berg G., Pirttilä A.M., Compant S., Campisano A. and Sessitsch A. (2015)., The hidden world within plants: ecological and evolutionary considerations for defining functioning of microbial endophytes., Microbiology and Molecular Biology Reviews, 79(3), 293-320.
  2. Mendes R., Garbeva P. and Raaijmakers J.M. (2013)., The rhizosphere microbiome: significance of plant beneficial, plant pathogenic, and human pathogenic microorganisms., FEMS microbiology reviews, 37(5), 634-663. https://doi.org/10.1111/1574-6976.12028.
  3. Rai M. (2006)., Plant-growth-promoting rhizobacteria as biofertilizers and biopesticides., In Handbook of microbial biofertilizers, CRC Press, 165-210.
  4. Beneduzi A., Ambrosini A. and Passaglia L.M. (2012)., Plant growth-promoting rhizobacteria (PGPR): their potential as antagonists and biocontrol agents., Genetics and molecular biology, 35(4), 1044-1051.
  5. Hayat R.S.M.T., Ali S., Siddique M.T. and Chatha T.H. (2008)., Biological nitrogen fixation of summer legumes and their residual effects on subsequent rainfed wheat yield., Pak J Bot, 40(2), 711-722.
  6. Ahemad M. and Kibret M. (2014)., Mechanisms and applications of plant growth promoting rhizobacteria: current perspective., Journal of King Saud University-Science, 26(1), 1-20.
  7. Zahir Z.A., Arshad M. and Frankenberger W.T. (2004)., Plant growth promoting rhizobacteria: applications and perspectives in agriculture., Advances in Agronomy, 81, 97-168.
  8. Khan A.G. (2005)., Role of soil microbes in the rhizosphere of plants growing on trace metal contaminated soils in phytoremediation., J. Trace Elem. Med.Brol., 18, 355-364.
  9. Bhuiyan M.A.H., Khanam D., Rahman M.T., Sheikh M.H.R. and Bhuiyan M.M.H. (2014)., Performance of single and mixed rhizobial inoculants on nodulation, dry matter and seed yield of lentil (Lens culinaris)., Bangladesh Journal of Agricultural Research, 39(1), 105-112. doi:http://dx.doi.org/10.3329/bjar.v39i1.20147
  10. Kennedy I.R., Choudhury A.T.M.A. and Kecskés M.L. (2004)., Non-symbiotic bacterial diazotrophs in crop-farming systems: can their potential for plant growth promotion be better exploited?., Soil Biology and Biochemistry, 36(8), 1229-1244.