Effects of strain BY2G20 on maize growth on nutrient solution. The maize seedlings were grown for 8 days on half-strength Hoagland’s nutrient solution supplemented with 100 mM NaCl or not, after being dipped in liquid containing strain BY2G20 at a concentration of 106 CFU/mL. Diagram of seedling growth status: (A) BY2G20− and NaCl−, (B) BY2G20− and NaCl+, (C) BY2G20+ and NaCl−, (D) BY2G20+ and NaCl+. (E to G) Physiological plant heights (E), root lengths (F), and fresh weights (G) of maize seedlings.