Fig. 2

Effects of drought stress on the Chao 1 and Shannon indices of endophytic communities in different parts of C. pilosula. a–d Chao 1 (a and b) and Shannon (c and d) indices of endophytic communities in different parts of C. pilosula. Different letters indicate significant difference by Duncan’s multiple range test (P < 0.05). e–h Chao 1 (e and h) and Shannon (f and g) indices of endophytic communities in C. pilosula under drought stress. CK, untreated group; DT, drought treatment group. Columns represent the means of three biological repeats ± SD. Asterisks indicate significant difference based on Student’s t–test (**P < 0.01; *P < 0.05)