In that process, some different types of incomplete or abnormal floral structures were observed to form in in vitro flowers (Fig. 1G-N). Similar abnormalities were observed previously in other plant species during in vitro flowering (Duan and Yazawa 1994, Chia et al. 1999, Saritha and Naidu 2007).
The various abnormalities observed in in vitro flowers indicate that different conditions might be required for
the initiation and development of flowers (Wang et al. 1993).
Although the characteristics of these abnormal flowers could not be stably inherited, these phenomena and materials have the potential to make in vitro Rosa flowering an ideal experimental system for research on the physiological and molecular mechanisms of rose flowering which have to date not yet been explored.