A comparative biochemical and cytological characterization of normal and habituated sugarbeet calli |
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Authors: | M Crevecoeur C Kevers H Greppln Th Gaspar |
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Institution: | (1) Laboratoire de Physiologie végétale, 3, pl. de l’Université, CH-1211 Genève 4, Switzerland;(2) Institut de Botanique B 22, Université de Liège, Sart Tilman, B, 4000 Liège, Belgium |
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Abstract: | Habituated sugarbeet callus examined by means of a light-microscope is characterized by absence of differentiated tracheary
elements and of the reaction with syringaldazine. Habituated tissues also were found to exhibit low guaiacol- and syringaldazine-peroxidase
activities, a deficiency of lignin as well as lower cellulose, dry mass and chlorophyll contents as compared to the normal
auxin-requiring callus. These histological and cytological features led to consider this habituated callus as a vitrified
tissue under stress. The question of a relationship between vitrification and habituation is posed. |
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