Figure 4.

Rhythmic Changes in Emission and Internal Pools of Benzenoid/Phenylpropanoid Compounds in Petal Tissue of Control and BPBT Knockout Petunia Plants.

Data represent the average pools and emission rates from three independent experiments performed over a 48-h period beginning with 2-d-old control (white bars) and BPBT RNAi-10 transgenic (black bars) flowers. Headspace collections were performed for 12 h, and samples were taken at 8 am (night points) and 8 pm (day points). Tissue for internal pools was collected at 9 am (day points) and 9 pm (night points). Emission rates are shown in the top graphs with white backgrounds, while internal pools for the corresponding volatiles are shown in the bottom graphs with gray backgrounds. Striped areas indicate night period. Bars indicate sd.