Figure 3.

Contact angle assay on C. sativa seeds for different plasma treatment times. The amount of 0.3 µL of water is dropped on the surface of the C. sativa seeds and the contact angle is measured. (A): The scheme of the contact angle that is measured in this experiment. (B): Boxplot of the measurement of contact angle versus different treatment times. The seeds were treated with DBD air plasma for 1 min (orange), 15 min (red) or non-treated (blue). (C): Pictures of the water droplet on seeds with or without plasma treatment. The experiment is carried out on 30 seeds from 2 different exposures for each treatment (1 min and 15 min while 0 min corresponds to the control). The significance differences were determined using the Duncan test: ****: p-value < 0.00005.