Fig. 2

Effects of exogenous silicon on leaf stoma, the root system photosynthetic rate, and the silicon and hormone contents of peach seedlings under continuous drought stress. a Opening and closing status of the leaf stomata. The net photosynthetic rate b silicon content c zeatin content d gibberellin content e auxin content f and abscisic acid content g in leaves. h Root growth status. The silicon content i zeatin content j gibberellin content k auxin content l and abscisic acid content m in roots. The values are presented as the mean ± standard error (SE) from three replicates, and each replicate contained six seedlings. Bars with different letters indicate significant differences (p < 0.05, Duncan’s multiple range tests)