Summary
Habituated sugarbeet callus and cell suspension cultures derived therefrom, compared to hormone-dependent normal cultures, exhibit a shorter linear growth phase, although they divide actively. Microscopic observations indicate deficiencies in cell expansion and absence of cell differentiation. Cell expansion apparently is interrupted by a cell “budding” process. Some of the cells seem to be empty due to ballooning out of the protoplasm and the bursting of the cell membrane by defective cell wall development. A low amount of cellulose was confirmed by microspectrophotometric estimation. Such cultures exhibit all the characteristics of vitrified tissue.
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Hagege, D., Kevers, C., Gaspar, T. et al. Abnormal growth of habituated sugarbeet callus and cell suspensions. In Vitro Cell Dev Biol - Plant 27, 112–116 (1991). https://doi.org/10.1007/BF02632193
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DOI: https://doi.org/10.1007/BF02632193