Home|Journals|Articles by Year Follow on Twitter| Subscribe to List

Directory for Medical Articles

Open Access

Original Article

Cr(VI) toxicity inhibits microbe enhanced plant growth promotion without affecting bioremediation potential

Vineet Kumar,Rishabh Anand Omar,Pramila Devi Umrao,Shilpa Deshpande Kaistha.

Hexavalent Chromium [Cr(VI)], an toxic inorganic pollutant of agriculture soil derived from various anthropogenic industrial sources disturbs vegetation and contaminates the food chain. Chromate microbial toxicity was studied using plant growth promoting chromate reducing Pseudomonas aeruginosa ATCC P15442 (P15). With a minimum inhibitory concentration of 1250 g/ml Cr(VI), the isolate is capable of 98% bioreduction of 100 g/ml Cr(VI) in 24h and 83% of 500 g/ml Cr(VI) in 72h. Additionally, P15 shows tolerance to cross heavy metal pollutants (Cd, Pb, and Zn), halotolerance and the production of plant growth promoting substance such as indole acetic acid (IAA), siderophore and phosphate solubilization in the presence and absence of Cr(VI). This study also reports that 100 and 250 g/ml Cr(VI) decreases production of IAA, siderophore, and phosphate solubilization without affecting the growth or Cr(VI) bioreduction ability. In Vigna mungo seed bacterization assay, P15 is capable of enhancing root and shoot length in absence of Cr(VI) and reversing toxic effects of 100 g/ml Cr(VI). No enhancement of plant parameters were observed at higher Cr(VI) concentrations except reversal of Cr toxicity. These data are indication of the detrimental effect of Cr(VI) pollution on rhizospheric microbial flora associated with PGP activities.

Key words: Cr(VI), PGPP, bioreduction, toxicity, Pseudomonas

Full-text options

Full-text Article

American Journal of Physiology, Biochemistry and Pharmacology


BiblioMed Home
Follow ScopeMed on Twitter
Author Tools
eJPort Journal Hosting
About BiblioMed
License Information
Terms & Conditions
Privacy Policy
Contact Us

The articles in Bibliomed are open access articles licensed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (https://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
ScopeMed is a Database Service for Scientific Publications. Copyright ScopeMed Information Services.