ABSTRACT
In the Gaillardia genus such as Gaillardia pulchella the fluorescence of components from secretory hairs also differed among organs (Fig. 2.20) which shows a different content of the secretions. In the leaf, blue emission with one maximum 475480 nm was seen, but in the flower one could observe blue or green-yellow lightening with two maxima 475 and 550 nm, whereas in the root - mainly, green-yellow emission with maximum 500 nm. The secretions released on the leaf or root surface form crystals fluoresced in the blue-green spectral region. We can see their bright emission with maximum 500 nm, as in secretory hair, but more intensive, approximately 2-2.5 fold. Idioblast of the root has the fluorescence spectra similar with its secretory hair which means a possible similarity in the chemical composition of the secretions in both types of cells (Table 2.1). The main components of the plant secretions are sesquiterpene lactones, such as gaillardine, which fluoresces in the blue spectral region.
