RESUMO
Objective To study the effect of three fungi of Helminthosporium on the seven kinds of bioactive constituents in root of seedling Rumex gmelini. Methods Let the R. gmelini infect the fungi of Helminthosporium by dealing the leave surface of R. gmelini with fungal spore suspension. The content of seven kinds of bioactive constituents was determined by HPLC and the results were analyzed by variance analysis. Results During the treatment time, little effect of three fungi of Helminthosporium on content of polydatin, chrysophanol 1-glucoside, and physcion, but the obvious effect on resveratrol, musizin, emodin, and chrysophanol was found. Conclusion The effects of H. turcicum 001 on yield and content of resveratrol are significant in early-middle stage (0—40 d), but treatment time over 40 d is not suitable. The results of this study could provide the new idea and theoretical basis for the exploiting of natural medicines and the planting of Chinese herbal medicine.