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Protective systems against activated oxygen species compared in normal and fully habituated nonorganogenic sugarbeet calluses
Hagège, D.; Kevers, Claire; Salabert, P. et al.
1992In In Vitro Cellular and Developmental Biology. Plant, 28 (3), p. 143-147
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Keywords :
Beta vulgaris
Abstract :
[en] The levels of the water-soluble reductants ascorbic acid and glutathione and the activities of the enzymatic antioxidants superoxide dismutase, catalase, ascorbate peroxidase, monodehydroascorbate and dehydroascorbate reductases and glutathione reductase were determined in a fully habituated nonorganogenic sugarbeet callus line (considered a neoplasm) compared with a normal hormone-dependent callus of the same plant. Ascorbic acid was not recovered from either of the two calluses, irrespective of the technique used. Glutathione was titrated at a slightly higher level in the normal callus. Catalase activity was almost nonexistent in the habituated callus. The other enzymes (superoxide dismutase, glutathione reductase, monodehydroascorbate reductase, dehydroascorbate reductase, and ascorbate peroxidase) were found to have higher activities in the habituated callus. The results are interpreted as a higher protection of the neoplastic habituated cells against oxygen-free radicals and hydroperoxide-dependent oxidations. Such strong scavenging properties of the habituated cell line could explain previous results already reported, namely the stimulation of cell division at the expense of cell differentiation. © 1992 Tissue Culture Association.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Hagège, D.;  Laboratoire de Physiologie et Biochimie végétales, Université de Caen, Caen cedex, F-14032, France
Kevers, Claire ;  Université de Liège > Département des sciences de la vie > Département des sciences de la vie
Salabert, P.;  Hormonologie fondamentale et appliquée, Institut de Botanique B22, Université de Liège, Sart Tilman, Liège, B-4000, Belgium
Gaspar, T.;  Hormonologie fondamentale et appliquée, Institut de Botanique B22, Université de Liège, Sart Tilman, Liège, B-4000, Belgium
Language :
English
Title :
Protective systems against activated oxygen species compared in normal and fully habituated nonorganogenic sugarbeet calluses
Publication date :
1992
Journal title :
In Vitro Cellular and Developmental Biology. Plant
ISSN :
1054-5476
eISSN :
1475-2689
Publisher :
Springer-Verlag
Volume :
28
Issue :
3
Pages :
143-147
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 July 2015

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