Fig. 2

Effect of exogenous 2,4-epibrassinolide (EBL) and methane-rich water (MRW) on AR development in marigold explants. The primary roots of 5-day-old seedlings were removed, and then each of 10 marigold explants was incubated with 1 μmol L^− 1 EBL, 20% MRW, 0.5 μmol L^− 1 Brz (brassinazole, a synthetic inhibitor of EBL) alone or together for 5 days, as indicated. Values (mean ± SE) of root number and root length (A) of marigold explants are the means of three independent experiments (n = 30). Bars with different lowercase letters are significantly different (Duncan’s multiple range test; p < 0.05). Photographs (B) were taken after 5 days of treatments