Fig. 6

The TEM micrographs of the epidermis of the end of the callus (1/3 of the lip length) from transmission electron microscopy (TEM): a cuboidal and rectangular cells with thick, outer tangential walls, different concentrations of compounds in vacuoles, and their fragmentation. b magnification of a, in the cytoplasm: plastid with plastoglobules, dictyosome, ribosomes, numerous vesicles building into plasmalemma. c different levels of osmiophilic phenolic concentration in vacuoles (white and black arrows). d magnification of c. e–f osmiophilic phenolic content, sometimes forming globules (white arrows) in the vacuole. cw—cell wall, d—dictyosome, m—mitochondrion, ml—middle lamella, n—nucleus, p—plastid, ps—periplasmic space, RER—rough endoplasmic reticulum, va—vacuole, ve—vesicle