Figure 2.
In vitro cultivated shoot cultures of H. calycinum L. in M_0 culture medium (A) with well visible translucent glands (Tr. gl.) on the leaves (B); stimulation of axillary shoot formation (C) and rooting (D) in M_1 medium; stimulation of the height of auxillary shoots formed in M_2 medium (E); further stimulation of the height of axillary shoots and inhibition of rooting in M_3 medium (F); intensive biomass formation (G) and dark glands on leaves margins (H) in in PGR-free M_0 medium H. tetrapterum Fries.; biomass formation (I) and dark and translucent glands on leaves (J) in H. perforatum L. in M_0 medium; growth inhibition and necrosis in PGR-free M_0 medium in H. richeri Vill. (K); biomass formation stimulation H. richeri Vill. (L) with well visible translucent and dark glands on the leaves (M,N) in M_2 medium. Space bar = 1 cm.
