Fig. 1

Effects of drought stress on the productions of lobetyolin, syringin, and atractylolide III in different parts of C. pilosula. a–c Contents of lobetyolin, atractylolide III and syringin in different parts of C. pilosula, respectively. Different letters indicate significant difference by Duncan’s multiple range test (P < 0.05). d–f Lobetyolin, atractylolide III and syringin contents in C. pilosula under drought stress, respectively. CK untreated group, DT drought treatment group, FW fresh weight. Columns represent the means of three biological repeats ± standard deviation (SD). Asterisks denote significant difference based on Student’s t-test (**P < 0.01; *P < 0.05)