Journal of Food, Agriculture and Environment

Vol 8, Issue 2,2010
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Effect of salinity and N sources on the activity of antioxidant enzymes in canola (Brassica napus L.)


Ahmad Bybordi

Recieved Date: 2010-02-06, Accepted Date: 2010-04-12


The effects of NaCl salinity (0 and 200 mM) and NH4:NO3 ratio (0:100, 25:75, 50:50 and 75:25) on the activities of antioxidant enzymes, viz. glutathione reductase (GR), superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and glutathione-S-transferase (GST), were investigated in leaves and roots of canola (Brassica napus L.). Salinity caused a reduction in plant biomass. The biomass production of plants at 75:25 NH4:NO3 was lower than that of plants at 0:100 NH4:NO3. The antioxidant enzymes exhibited higher activity in saline-treated plants. Changes in antioxidant enzyme activity caused by different NH4:NO3 ratios differed in leaves as well as in roots of canola. At 75:25 and 50:50 NH4:NO3 ratios plants showed higher CAT, GR and GST activity in leaves and roots, while POD and SOD activity was higher at 0:100 NH4:NO3.


Antioxidant enzymes, salt stress, NH4: NO3 ratio, canola

Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 2
Category: Agriculture
Pages: 350-353

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