Fig. 2.

Dose response of six herbs andL-3,4-dihydroxyphenylalanine(l-DOPA)against1-methyl-4-phenylpyridinium (MPP+) iodide-inducedneurodegeneration. Effect of different concentrations of the herbal extracts and l-DOPA (positive control) on MPP+ iodide (5 mM)-induced neurodegeneration in the L1 larvae of BZ555 worms after 20 h treatment at 23 °C. Filled bars indicate neurodegeneration in groups treated with MPP+ iodide and herbal extract/l-DOPA, while open bars indicate neurodegeneration in groups treated with extract/l-DOPA alone. Data are represented as mean ± standard deviation. (∗p < 0.05; one-way analysis of variance, followed by Tukey’s post-hoc test).