Fig. 3
Effects of NaHS on root length, fresh weight and cell death of cucumber seedlings under Cd stress. a Effects of different concentrations (1, 10, 100 and 200 μM) of NaHS (a H2S donor) on root length (b) and fresh weight of cucumber seedlings under Cd stress. c Effects of different concentrations (1, 10, 100 and 200 μM) of NaHS on root length of cucumber seedlings under without Cd stress. d Roots stained with Evans blue were observed. e Quantitative analysis of root tip cell death in cucumber seedlings. Scale bar indicates 500 μm. The results are means ± SE of three independent experiments (n = 10). Different letters indicate significant differences (P < 0.05; Duncan’s multiple range test). FW, fresh weight