Fig. 4.

Effect of silica and silica nanoparticles priming at 30 and 100 ppm concentrations on (a) seedling length, (b) seedling fresh weight, and (c) seedling dry weight of 6-day-old rice seedlings. Data are presented as means ± SE. Significant differences in the mean value of each treatment are represented by different lowercase letter (s) based on Fisher’s test (p ≤ 0.05, n = 3). HP: hydro priming, Bulk-Si: silica, Bio-SiNP: biologically synthesized silica nanoparticles, Chem-SiNP: chemically synthesized silica nanoparticles.