Abstract
Protoplasts were obtained from tetraploid wheat (Triticum timopheevi Zhuk.) suspension culture by incubation in solution of 1 % pectinase 500, 1 % driselase and 1 % cellulase and cultivated in Schenk and Hildebrandt medium. Freshly isolated protoplasts contained dense cytoplasm and constricted organellae exhibited negative contrast of their membranes. Together with normal protoplasts huge multinucleate protoplasts were present in the population. 3 h after plating, the cytoplasm showed normal appearance, the negative contrast of membranes was not evident any longer. Cisternae of endoplasmic reticulum and Golgi apparatus were numerous. There were some vesicles and fibres on the protoplast surface. 8 d after plating, many dividing cells were found out and cell clumps arosen in this way were present in the culture. Some of the protoplasts particularly those originally multinucleate ones were upset.
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