Journal of Stress Physiology &
Biochemistry, Vol.
8 No. 4
2012, pp. 78-89 ISSN 1997-0838
Original Text Copyright (cc) 2012 by Moradkhani, Khavari Nejad, Dilmaghani, Chaparzadeh
ORIGINAL
ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 9
Effect of salicylic acid
treatment on cadmium toxicity and leaf lipid composition in sunflower
Sakineh Moradkhani1*,
Ramazan Ali Khavari Nejad1, Kamaladdin Dilmaghani2
and Nader Chaparzadeh3
1
Department of Biology, Science and Research Branch, Islamic Azad
University, Tehran , Iran 2 Department of Plant Biology, Marand Islamic Azad
University, Marand, Iran 3 Department of Plant Biology, Azerbaijan University of
Tarbiat Moallem, Tabriz, Iran
*E-Mail: Moradkhani544@Yahoo.com
Received July 14, 2012
The ameliorative effect of
salicylic acid (SA) on cadmium (Cd) toxicity in sunflower plants was
studied by investigating plant growth and fatty acid composition.
Sunflower plants in two leaves stage were exposed to CdCl2 treatment
(0, 50, 100, 150 and 200 µM) and then were treated with salicylic acid
(0, 250 and 500 µM) as foliage spraying. One week after the last
salicylic acid treatment,plants were harvested and growth parameters
were measured . Oil of leaf was extracted in a Soxhlet system and fatty
acid composition were measured by gas chromatography (GC). Statistical
analyses showed excess Cd reduced growth parameters (fresh weight and
length of stems and roots, fresh weight and number of leaves)and SA
increased them compared with the control. Maximum reduction in these
parameters was at 200 µmol Cd and 0µmol of SA. Cd caused a shift in
fatty acids composition, resulting in a lower degree of their
unsaturation and an increase in saturated fatty acids in sunflower
leaves,whereas SA improved them. SA, particularly increased the
percentage of linolenic acid and lowered that of palmitic acid by the
same proportion. These results sugg membrane integrity due to lipids
est that SA could be used as a potential growth regulator and a
stabilizer ofprotection of cadmium-induced oxidative stress to improve
plant resistance to Cd stress
