Fig. 3.

Diurnal changes of floral and vegetative volatile emissions from A. lyrata ssp. petraea. High resolution volatile measurement recorded by PTR-MS for a single intact flowering plant (Plech). Volatile emission was monitored continuously over a time course of 48 h under a 13 h light/11 h dark rhythm as described in “Materials and methods”. The protonated masses of benzaldehyde (107), phenylacetaldehyde (121), and sesquiterpene olefins including cyclosativene (205) are recorded. The scale for mass 205 is shown on the right