Figure 4.

Effects of Trichoderma spp. treatments on the transcription of defence‐related genes in tomato. The relative expression of PR1b1, PR‐P2, PINI, PINII, TomLoxA and TomLoxC was measured by quantitative reverse transcription real‐time polymerase chain reaction (qRT‐PCR) in 2‐month‐old plants of Solanum lycopersicum (Corbarino, TA209, M82 and SM36) and S. habrochaites (LA1777) lines, developed from untreated (Cont) or T. atroviride P1‐treated (P1) or T. harzianum T22‐treated (T22) seeds. Expression levels for each gene are reported as the fold increase relative to those of the untreated control. Values within the dotted lines were not considered to be statistically significantly different from the control. Data on PINII expression in the wild tomato line LA1777 are missing as no amplification of this gene could be obtained with the primer pair used. The results shown are from one representative experiment out of four.