Fig. 1

Effect of different concentrations of Sr²⁺ on hyphal growth in T. reesei RUT-C30 strain. a Hyphal growth of RUT-C30 strain on MM plates. The MM culture was supplemented with Sr²⁺ at a final concentration of 0–120 mM. b Colony diameter under different concentrations of Sr²⁺. c Biomass dry weight in MM liquid culture of RUT-C30 strain. The final values are presented as the mean ± standard deviation (SD) of three independent experimental results. Asterisks indicate significant differences compared to the control (p < 0.05, according to Student’s t-test). MM, minimal medium