Evolution effect of salt stress on ion concentration and seedling growth of canola varieties (Brassica napus L.)

Subject Areas : agronomy

Rozbeh Farhoudi ¹ ( Department of Agronomy & Plant Breeding, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran )

Received: 2018-07-23 Accepted : 2018-10-27 Published : 2019-01-21

Keywords: Peroxidase activity, Malondealdehaid, K/Na,

Abstract :

This research carried to evolution response of rapeseed varieties to salt stress. In first experiment growth response of five rapeseed varieties (Fornex, Consoul, Orient, Opera and Okamer) to four salinity levels (0, 40, 80 and 120 mmol NaCl) was investigated using a factorial experiment with randomized complete blocks design in three replications. Results indicated under highest salinity, highest and lowest seedling dry matter obtained from Fornex (3.3 gr) and Okamer (1.2 gr). In twice experiment, salt tolerance mechanism in Fornex (salt tolerance) and Okamer (salt sensitive) was evaluated. Results showed Fornex salt tolerance due to lowest Na+ and Malondealdehaid leaf concentration and highest K+ and Peroxidase activity in compared Okamer varity. Results indicated decrease in Na+, increase in K+ and K/Na and Peroxidase activity have reasonable role in salt tolerance in canola cultivars.