Plants of C. ovata were regenerated in vitro from shoot tips and nodal explants as well as from cotyledon-derived calluses. For shoot proliferation from shoot tips and nodal segments, Schenk and Hildebrandt (1972) or Lloyd and McCown (1980) basal media, supplemented with 6-benzyladenine (2.2–22.2 μM) alone or in combination with indole-3-acetic acid (0.6 μM), were used. Shoot regeneration through organogenesis was achieved by culturing cotyledons on Schenk and Hildebrandt medium containing indole-3-acetic acid (0.6 μM) and 6-benzyladenine (4.4 μM) or zeatin (22.8 μM). TLC and HPLC analysis showed that the multiple shoots and micropropagated plants exhibited similar iridoid patterns as those of the leaves of original plants of C. ovata. The highest levels of catalpol and catalposide (8.2 and 2.4 % of dry weight, respectively) were found in aerial parts of three-month-old in vitro regenerated plants.
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Lisowska, K., Wysokinska, H. In vitro propagation of Catalpa ovata G. Don. Plant Cell, Tissue and Organ Culture 60, 171–176 (2000). https://doi.org/10.1023/A:1006461520438
- Catalpa ovata