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Fully habituated sugarbeet callus: Under permanent stress?
Le Dily, F.; Billard, J.-P.; Huault, C. et al.
1993In In Vitro Cellular and Developmental Biology. Plant, 29 (4), p. 149-154
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Keywords :
Beta vulgaris
Abstract :
[en] A fully habituated nonorganogenic (HNO) sugarbeet callus line, compared to a normal (hormone dependent) one originated from the same plant exhibits many characteristics of a vitrified tissue and several traits common to animal cancer cells. Four types of biochemical or metabolic characteristics of HNO callus [deficiency of tetrapyrrole-containing compounds; lipid (per)oxidation and malondialdehyde formation; high activity of enzyme protective systems; proline, glutamate, and polyamine accumulation] may be interpreted as responses to stress. The deficiency of tetrapyrrole-containing compounds can be considered an indirect protection against activated forms of oxygen as well as the higher activity of the antioxidant defense mechanisms. This fits with suggestions in the literature that the autonomy associated with plant cancer tissue is explained on the basis of antioxidants as stimulators of cell division and corresponding inhibitors of cell differentiation. Such changes occurring in HNO cells may in turn be responsible for a greater absorption and sensitivity to ammonium ions. An altered nitrogen metabolism leads to proline, glutamate, and polyamine accumulation. Lipid peroxidation and malondialdehyde accumulation rapidly occur in this very sensitive HNO callus in a prolonged culture cycle, which might be related to the appearance of necrosis bands. Thus there are arguments allowing us to consider HNO cells as mutants adapted to some stresses, but resulting changes in their structure might have rendered them still more sensitive to other factors. © 1993 Tissue Culture Association.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Le Dily, F.;  Laboratoire de Physiologie et Biochimie végétales, associé INRA, Université de Caen, Caen, F-14032, France
Billard, J.-P.;  Laboratoire de Physiologie et Biochimie végétales, associé INRA, Université de Caen, Caen, F-14032, France
Huault, C.;  Laboratoire de Physiologie et Biochimie végétales, associé INRA, Université de Caen, Caen, F-14032, France
Kevers, Claire ;  Université de Liège > Département des sciences de la vie > Département des sciences de la vie
Gaspar, T.;  Hormonologie fondamentale et appliquée, Institut de Botanique B 22, Université de Liège, Sart Tilman, Liège, B-4000, Belgium
Language :
English
Title :
Fully habituated sugarbeet callus: Under permanent stress?
Publication date :
1993
Journal title :
In Vitro Cellular and Developmental Biology. Plant
ISSN :
1054-5476
eISSN :
1475-2689
Publisher :
Springer, Heidelberg, Germany
Volume :
29
Issue :
4
Pages :
149-154
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 July 2015

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