Fig. 3

Effect of the strain of Trichoderma longibrachiatum T6 on (a) IAA production, and (b) the expression of TaTGW6 and (c) TaIAGLU genes in wheat seedling roots under NaCl stress. The line bars represent the standard errors of the means. Different letters denote significant difference at the P < 0.05 level by Duncan’s new multiple range test (n = 12). In the three TL-6 treatments, wheat seeds were presoaked with the suspension of TL-6 spores for 12 h, whereas in the three sterile water treatments, wheat seeds were presoaked with sterile water only