No abstract

Effects of PA on in vitro shoot proliferation and root formation were investigated using shoot cultures of three Japanese pear (Pyrus pyrifolia Nakai) cultivars. PA inhibited shoot multiplication and promoted initiation and development of roots in the cultured shoots of three cultivars, resulting in increasing the proportion of rooted shoots. Chemical name used: pyroligneous acid (PA).

We aimed to identify the main compounds responsible for low temperature-induced yellow pigmentation of the bracts of Zantedeschia aethiopica 'Wedding March'. On the basis of the area ratios estimated from absorbance at 400 nm in HPLC analyses, we identified two flavonoids, isoorientin and swertiajaponin, as such compounds. We also identified two additional flavonoids, isovitexin and swertisin, which do not contribute considerably to the yellow pigmentation. Flavonoids of Zantedeschia bracts seem to belong to the class of flavone C-glycosides.