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Effects of T. virens and T. atroviride on expression of the JA responsive gene marker pLox2:uidA. GUS expression in seedlings was determined every 2 d after inoculation in a time-course plant-fungus co-cultivation experiment. JA was used as a positive control and dimethyl sulfoxide served as negative control. Bar = 1 mm. Photographs show representative individuals of at least 20 stained seedlings. The experiment was repeated twice with similar results.
