Study the effect of salinity stress on antioxidant enzymes activity and indicators oxidative stress in weeds Redroot Pigweed (Amaranthus retroflexus L.), Bindweed (Convolvulus arvensis L.) and Russian Knapweed (Acroptilon repens L.)

Subject Areas : Journal of Plant Ecophysiology

V. Enaiati ¹ , E. Esfandiari ² , A. Pourmahammad ³ , K. Mohammadnia ⁴ , اصغر Rahimi ⁵

1 - گروه زراعت و اصلاح نباتات، مراغه، دانشگاه مراغه، ایران
2 - دانشگاه مراغه
3 - گروه زراعت و اصلاح نباتات، مراغه، دانشگاه مراغه، ایران
4 - گروه زراعت و اصلاح نباتات، دانشکده کشاورزی دانشگاه فردوسی مشهد، مشهد، ایران
5 - گروه ریاضی، مراغه، دانشگاه مراغه، ایران

Received: 2015-02-26 Accepted : 2015-07-26 Published : 2016-12-01

Keywords: Salinity, Lipid peroxidation, Antioxidative enzymes, weed,

Abstract :

Waiver of noticeable weeds injuries on crop yield, so far has not been studied the effects of salinity on behavior physiological and biochemical. In order to weeds redroot pigweed, Bindweed and Russian knapweed choice and the effects of three levels of salinity control (0), 50 and 100 mM, in a randomized complete block design with 4 replications in a greenhouse were studied. The results showed that levels of salinity only on dry weight was not significant in the bindweed. Moreover the superoxide dismutase (SOD) activity in salinity decreased in Redroot Pigweed and Russian Knapweed weeds, but its activity was not affected in bindweed of salinity. Also, the results of assay activity removal enzymes of hydrogen peroxide showed that this enzymes did not affect only the bindweed of salinity. Whereas in Russian knapweed the activity this enzyme was significantly reduced. In Redroot pigweed also only enzyme Ascorbate peroxidase (APX) activity was reduced by salinity. In studied weeds the salinity had not effect activity of the glutathione S- transferase (GST) enzyme. On the other hand, the amount of hydrogen peroxide (H2O2) in the three studied weeds significantly increased on salinity of 100 mM. But increase the rate of lipid peroxidation at effect salinity observed only in Russian knapweed and redroot pigweed. Based on the results due to the lack of significant changes in antioxidant enzymes at bindweed, this plant is tolerant to salinity levels investigated compared to Russian knapweed and redroot pigweed.