Fig. 3

Histology of embryonal masses from primary and secondary lines of the genotype TD17. a, c / TD17; b, d / TD17–1. a,b – polyembryogenic centers (PECs); c – small SEs, arrowheads point to actively dividing cells (metaphase/anaphase); d – singulated large SEs; m – meristem of PECs or singulated SEs, s – suspensor; Paraffin sections stained with Alcian Blue/Nuclear Fast Red. Scale bars: a, d, f = 500 μm; b = 100 μm; c = 200 μm; e = 50 μm