Fig. 2

Synergistic effect of nitric oxide and arginine on photosynthetic pigments of Brassica napus grown in salt stress. (A) Chlorophyll a, (B) Chlorophyll b, (C) Total chlorophyll and (D) Carotenoids. Graph bars presented mean of three replicates ± standard errors in error bars. Different alphabets above graph bars obtained after Duncan’s multiple range test presented mean values are significantly different at p ≤ 0.05.