• Slideshow
  • Slideshow 2
  • Slideshow 3
  • International Journal of Microbial Resource Technology
  • IJMRT
  • Our manuscripts areas
  • International Journal of Microbial Resource Technology

    ISSN 2278-3822
    Frequency: Quarterly
    We guarantee rapid publication. The journal is comprehensive.The journal is driven by international, well-known Editors.It provides an easy-to-use online submission and tracking system. It also provides innovative results and new imaging technologies.The journal regularly brings up-to-date with focused/current topics.Since the very ancient time man is exploiting Microorganisms as natural resources

  • IJMRT

    ISSN 2278 – 3822
    Frequency: Quarterly
    International Journal of Microbial Resource Technology (IJMRT) Guarantees rapid publication.This is comprehensive.The journal is driven by international, well-known Editors.It provides an easy-to-use online submission and tracking system. It also provides innovative results and new imaging technologies.

  • Our manuscripts areas

    Microbiology, Ecology, Genetics and Cell Biology,Cell development, Microbial interactions, Advanced/new methodologies, Novel Molecular Biology methods , Microbial Physiology and Metabolism.

Detail of Issue

  • Colonization behaviour of Gluconoacetobacter diazotrophicus in root-knot nematode (Meloidogyne incognita) infected and healthy cotton plants

    Chawla, N., Anand, R.C. and Narula, N.
    Download PDF

Abstract

The root colonization by Gluconoacetobacter diazotrophicus 35-47, applied as seed treatment, was studied in cotton (Gossypium hirsutum) plants infected with root-knot nematode (Meloidogyne incognita) and were compared with healthy cotton plants grown in sterilized and unsterilized soil, under green-house conditions. Inoculation of G. diazotrophicus strain 35-47 significantly reduced 89% root-knot disease intensity with enhanced plant growth parameters in nematode infected as well as healthy cotton plants under both soil conditions. Population dynamics of G. diazotrophicus strain 35-47 indicated highest bacterial counts in adhered (86.25 × 103 CFU ml-1) unsterilized soil, followed by the root washings (12.25 × 103 CFU ml-1) in sterilized soil conditions. Minimum counts were recorded in rhizospheric soil under both sterilized as well as unsterilized soil conditions. Unsterilized soil was found to support better multiplication of G. diazotrophicus 35-47 on the root surface as compared to sterilized soil. G. diazotrophicus strain 35-47 was not recovered from the internal tissues of cotton plant. Our studies revealed that this bacterium colonizes root surface and not the internal tissues of the cotton plant, thereby suggesting that it is a ‘root-surface colonizer’ and not an ‘endophyte’ of cotton plant.

 

Keywords: Bacterium; biocontrol; Gossypium hirsutum; root colonization; root-knot nematode.