Fig. 4

Effect of Rhizobium MAP7, Brevibacillus DesertYSK, Pseudomonas MAP8, Bacillus MAP3, Brevibacillus MAP4 and Bacillus DeltaYSK on A chlorophyll a, B chlorophyll b, C carotenoids, and D Total pigments of Lactuca sativa after germination for 9, 15, 20, and 30 days. The bars represent the mean value (n = 10) and the error bar represents ± standard error. Different lower-case letters indicate significant differences between the treatments “at particular sampling time” according to Duncan’s test at P ≤ 0.05