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1

Tracheogenesis in callus tissue of Plantago asiatica L.

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Andrzejewska-Golec E., Makowczynska J., Marek K.
Biotechnologia
|
2004
|
issue 2
267-274
EN
2 Xylogenesis was observed in the morphogenic and nonmorphogenic calluses. The light microscopy was used for a histological study. The ultrastructure of the calluses was analysed using the JEM 100 B transmission electron microscope. Tracheary elements were formed in all studied kinds of calluses. They had lignified spiral or reticulate thickening of cell walls. In nonmorphogenic calluses, tracheary elements were chaotically dispersed. In morphogenic callus, the vessel system during caulo- and rhizogenesis from tracheary elements was formed. The application of TEM allowed for an observation of the very early stages of formation of tracheary elements which were initiated by the degeneration of cell protoplast and transformation of cell wall. Tracheogenesis has been already studied in callus culture. However, rarely the authors were concerned on the phenomenon of the ultrastructure level.
2

Plastids in callus tissue culture of Plantago asiatica L.

100%
Makowczynska J., Andrzejewska-Golec E., Marek K.
Biotechnologia
|
2004
|
issue 2
275-281
EN
For the last few years, in the Department of Biology and Pharmaceutical Botany ? Plantago asiatica L. ? a medicinal plant, popular in the Far East, has been cultured in vitro. Two lines of the nonmorphogenic callus were obtained: cream- and green- coloured. They were induced from the roots taken from 4-week-old seedlings. The cream-coloured callus was cultured on Murashige and Skoog medium enriched with 0.5 mg/dm3 2,4- D and 0.2 mg/dm3 BAP. The green callus was initiated on the same medium supplemented with 0.1 mg/dm3 IAA and 2 mg/dm3 BAP and next it was cultured on MS with 0.5 mg/dm3 IAA and 0.2 mg/dm3 BAP. The fragments of the callus were studied using the light microscope and the transmission electron microscope. For cream-coloured callus, proplastids and amyloplasts were observed. In green callus, in addition to the plastids found in cream-coloured callus, also chloroplasts were observed.
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