Fig. 1

Emission of monoterpenes from P. violacea flowers exposed to different light/dark conditions. a Flowers were exposed in 16 h/8 h L/D condition for 5 days and followed by constant light (~ 100 μmol m⁻² s⁻¹) for 4 days. b Flowers were exposed in 16 h/8 h L/D condition for 5 days and followed by constant dark for 4 days. Floral scent was collected by applying solid-phase extraction at four time point in the interval of 5–6 h during 24-h. Shaded area was correspond to the dark condition. Experiments were based on triplicate biological replicates