| Home  | About ScienceAsia  | Publication charge  | Advertise with us  | Subscription for printed version  | Contact us  
Editorial Board
Journal Policy
Instructions for Authors
Online submission
Author Login
Reviewer Login
Volume 47 Number 6
Volume 47 Number 5
Volume 47 Number 4
Volume 47S Number 1
Volume 47 Number 3
Volume 47 Number 2
Earlier issues
Volume 42 Number 2 Volume 42 Number 3

previous article next article

Research articles

ScienceAsia 42 (2016): 92-98 |doi: 10.2306/scienceasia1513-1874.2016.42.092

Bioaccumulation of chromium by Fusarium oxysporum

Saba Khurshida, Amna Shoaiba,*, Arshad Javaida, Kamran Abidb

ABSTRACT:     We investigated the impact of both hexavalent and trivalent chromium on mycelial growth and metal accumulation in the wilt pathogen of tomato (Fusarium oxysporum f. sp. lycopersici). Experiments were conducted in liquid growth medium amended with 19 concentrations of either Cr(III) or Cr(VI). Metal-amended medium was inoculated with the pathogen and incubated for 15 days at 25±3 °C, 50 rpm, and at pH 5. Generally, the fungal dry biomass was significantly inhibited by 14–64% and 30–95% with increase in concentrations (5–350 ppm) of Cr(III) and Cr(VI), respectively. The fungus was unable to grow at metal concentrations higher than 400 ppm. The metal accumulation by the fungus decreased with an increase in metal concentration. The fungal biomass exhibited the greater accumulation capacity (0.01–2.6 mg/g) for Cr(VI) than that of Cr(III) (0.01–1.86 mg/g). The bioaccumulation factor of the fungus for both oxidation states of Cr ranged between 0.7 and 0.9.

Download PDF

16 Downloads 1184 Views

a Institute of Agricultural Sciences, University of the Punjab, Lahore, Pakistan
b Department of Electrical Engineering, University of the Punjab, Lahore, Pakistan

* Corresponding author, E-mail: aamnaa29@yahoo.com

Received 5 Dec 2014, Accepted 0 0000