TITLE:
Alleviation of Adverse Effects of Salt Stress in Wheat Cultivars by Foliar Treatment with Antioxidant 2—Changes in Some Biochemical Aspects, Lipid Peroxidation, Antioxidant Enzymes and Amino Acid Contents
AUTHORS:
Ebtihal M. Abd Elhamid, Mervat Sh. Sadak, Medhat M. Tawfik
KEYWORDS:
Amino Acid, Antioxidant Enzymes, Ascobin, Phenolic Contents, Salinity Wheat
JOURNAL NAME:
Agricultural Sciences,
Vol.5 No.13,
November
16,
2014
ABSTRACT:
Ascobin (compound composed of ascorbic acid and citric acid) is
considered one of exogenous protectants which may alleviate the harmful effects
of salinity stress. Pot experiments were performed at the screen greenhouse of
National Research Centre, Cairo, Egypt to study the effect of foliar treatment
of two cultivars of wheat plant with different concentrations of ascobin (0,
200, 400 and 600 mg/l) on some biochemical parameters, antioxidant enzymes,
element contents and amino acid constituents of two cultivars of wheat plant
grown under different salinity levels (0.0, 3000 and 6000 mg/l) in 2011/2012
and 2012/2013. Salinity with different concentrations levels increased phenolic compounds
contents of the two wheat cultivars. The activities of antioxidant
enzymes (SOD, CAT, POD, PPO, AXP and GR) dramatically increased due to salinity
stress. Amino acid content was increased in cultivar Sids 1, while the content
was decreased in cultivar Giza 168 in all salinity treatments. Increments in
the above mentioned parameters compared to the untreated plants at normal and
stressed conditions. The magnitude of increments was much more pronounced in
response to 600 mg/l of ascobin. It could be concluded that, foliar treatment
of wheat cultivars with ascobin could partially alleviate the
harmful effect of salinity especially at the lower levels of salinity of the
two cultivars of wheat at most of the studied parameters.