Fig. 2.

Alarm response of colonies of M. persicae to volatiles released by A. thaliana (Col-0). The percentage of aphids moving after 1 min and 15 min was recorded, and the arcsin-transformed data were subjected to ANOVA. Columns with different letters indicate responses that are significantly different (P < 0.05; n = 10). (A) Response to 1-μl droplets of air entrainment samples of transgenic and wild-type A. thaliana volatiles, compared with the response to synthetic Eβf in hexane and a hexane control. (B) Response to 20-ml samples of vapor from the headspace above individual plants of transgenic and wild-type A. thaliana, enclosed in 2-liter vessels, and synthetic Eβf.