Figure 3.

Gene expression analysis using real-time quantitative PCR (qRT-PCR) of the tomato ethylene receptor genes LeETR4 and LeETR6 in mycorrhizal tomato roots 44 and 56 days after inoculation with G. intraradices. Real-time qPCR was based on Ct values that were normalized using the household gene LeEF-1α (X14449). The expression for each gene in the different mutants is given relative to the expression of the same gene in the corresponding wild-type plant. Bars represent mean values ±SE of three independent biological replicates.