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Volume 7, Issue 4 (Suppl)
J Biotechnol Biomater, an open access journal
ISSN: 2155-952X
Bio America 2017
October 19-20, 2017
October 19-20, 2017 | New York, USA
18
th
Biotechnology Congress
Effect of heavy metals on antioxidant activities on the growth and yield of potato irrigated with tannery
effluent
Sheza Ayaz Khilji, Zahoor Ahmad Sajid
and
Firdaus-e-Bareen
University of the Punjab, Pakistan
A
wide range of environmental factors including heavy metals stress stimulates oxidative stress. So, antioxidant resistance
mechanisms may provide a strategy to enhance metal tolerance by minimizing the toxic effects of reactive oxygen species (ROS)
In the present investigation, the effects of heavy metals producing antioxidative defense systems i.e. Superoxide dismutase, Peroxidase
andCatalase were studied in the potato plants grown in soil pollutedwith heavymetals (Cr, Cd, Pb).The results showed that the tannery
effluent was highly toxic with high values of all pollution parameters (pH, TDS, NaCl %, ECe, bicarbonates, chlorides). Amount of
heavy metals was also high in the effluent and increased with increasing the concentration of effluent. Amount of chromium was the
maximum as compared to other heavy metals. Four concentrations of tannery effluent (0, 2, 4, 6 and 8%) were prepared with normal
garden soil along with the two treatments of ascorbic acid i.e., 0 and 0.5mM. The maximum biomass was observed in the control
and it was decreased with the increasing effluent concentration. The exposure of plants to the highest concentration (8%) reduces the
height of shoot. Among the treatments, 0.5mMwas observed to show the best tolerance and growth properties with respect to metals.
The antioxidant enzyme activities were increased by metals stress. The present investigation revealed that the ascorbic acid treatment
by foliar spray on the growing plants of potato could enhance the efficiency of antioxidants that significantly reduce the toxic effect
of metals from tannery effluent amended soil. The antioxidative activity seems to be of primary importance for adaptive response of
potato plants against ROS produced under environmental stress
shezakhilji@gmail.comJ Biotechnol Biomater 2017, 7:4 (Suppl)
DOI: 10.4172/2155-952X-C1-080