Figure 1. Effects of salt stress on growth and physiological indicators of soybean seedlings.

(A) After salt treatment (0, 3, 6, 12 h), the accumulation of O${}_2^{-}$ and H₂O₂ in leaves was detected by NBT and DAB staining, respectively, (B) phenotypic changes of soybean seedlings after treatment with 100 mM NaCl for 6 days, (C) plant height, (D) fresh weight, (E) Na⁺ content and (F) K⁺ content in shoots, and (G) proline content under normal (CK) and salt treatment conditions. Data represent mean ± SD (n = 6), *P < 0.05 (Student’s t test).