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MODULATION IN
ACTIVITIES OF ANTIOXIDANT ENZYMES IN SALT STRESSED AND NON-STRESSED
WHEAT (TRITICUM AESTIVUM L.) PLANTS RAISED FROM SEED TREARTED
WITH TRIACONTANOL
SHAGUFTA PERVEEN1,
MUHAMMAD SHAHBAZ1*, MUHAMMAD ASHRAF1, 2
Abstract:
Before sowing,
the seeds of two wheat cultivars, S-24 and MH-97, were treated with
three levels [(0 (water), 10 and 20 µM)] of triacontanol (TRIA)
for 12 h. TRIA-treated seeds were grown in full strength nutrient
solution for 24 days in a greenhouse, after which time, they were
supplied with two salt treatments (0 and 150 mM NaCl ). After 21
days of salt application, changes in the malondialdehyde (MDA), hydrogen
peroxide (H2O2) and total soluble proteins
contents as well as activities of some key antioxidant enzymes (CAT, POD
and SOD) were measured. Salinity stress of 150 mM NaCl
significantly decreased the activity of SOD, while increased that of
CAT, and enhanced the levels of MDA and H2O2
contents in both cultivars under salt stress conditions. The outcome of
salt stress was non-significant on soluble proteins and activity of POD.
The effect of pre-sowing application of TRIA was non-significant on all
measured attributes except that it significantly increased the activity
of POD under non-saline conditions. The cultivar difference with respect
to the different attributes measured in the present investigation was
non-significant.
1Department
of Botany, University of Agriculture, Faisalabad, Pakistan
2Department
of Botany & Microbiology, King Saud University Riyadh, Riyadh, Saudi
Arabia
*Corresponding
author’s email: shahbazmuaf@yahoo.com
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