Fig. 3From: Ultrahigh-activity immune inducer from Endophytic Fungi induces tobacco resistance to virus by SA pathway and RNA silencingAccumulation of free SA in Nicotiana. Benthamiana induced by ZNC. The plants were treated with 150 ng/mL, SA was extracted at different time points. Values are the mean of three replicates ± SD (n = 3). ** indicates extremely significant differences determined using the Student’s t-test (I < 0.01).Back to article page