Article (Scientific journals)
Shemin Pathway and Peroxidase Deficiency in a Fully Habituated and Fully Heterotrophic Non-Organogenic Sugarbeet Callus: An Adaptative Strategy or the Consequence of Modified Hormonal Balances and Sensitivities in These Cancerous Cells? A Review an
Gaspar, Thomas; Kevers, Claire; Bisbis, Badia et al.
1999In Cell Proliferation, 32 (5), p. 249-70
Peer Reviewed verified by ORBi
 

Files


Full Text
Cellprol1999.pdf
Publisher postprint (2.69 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[en] There are many arguments for considering a specific fully habituated (auxin and cytokinin-independent) and fully heterotrophic non-organogenic (HNO) sugarbeet callus cell line as terminating a neoplastic progression, and thus to be made of cancerous cells. The similarities with animal tumour and cancer cells are recalled. All types of habituated tissues examined in the literature share at least three common biochemical characteristics: low apparent peroxidase activity, high content of polyamines (PAs) and low production of ethylene. However, results concerning their auxin and cytokinin levels are not consistent. Peroxidase synthesis in the achlorophyllous HNO callus appears to arise from aminolevulinic acid (ALA) synthesis through the Shemin pathway, commonly used by animals and fungi. This pathway is limited by disturbed nitrogen metabolism that diverts glutamate (directly used for ALA synthesis in green higher plants) from the Kreb's cycle into PA synthesis. There is no argument to suggest that the low ethylene production is caused by a competition with PAs for their common precursor, S-adenosylmethionine. The results we report here indicate modified anabolic and catabolic pathways of auxins and cytokinins but also the possibilities of unusual compounds playing similar roles (dehydrodiconiferyl alcohol glucosides, for instance). A higher turnover of PAs is shown in the HNO callus, which could suggest a role for H2O2 and gamma-aminobutyric acid, products or intermediates in the PA catabolic pathway, as secondary messengers. The habituated cells retain some sensitivity towards exogenous auxins and cytokinins. Their increased sensitivity to PAs and ethylene suggests modified hormonal balances for the control of these actively dividing cells.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Gaspar, Thomas ;  Botanique, radiobotanique & serres expér.
Kevers, Claire ;  Université de Liège - ULiège > Département des sciences de la vie > Biologie moléculaire et biotechnologie végétales
Bisbis, Badia;  Université de Liège - ULiège > Hormonologie végétale
Penel, Claude;  Université de Genève - UNIGE > Physiologie et Biochimie végétales
Greppin, Hubert;  Université de Genève - UNIGE > Physiologie et Biochimie Végétales
Garnier, Frédérique;  Université de Liège - ULiège > Hormonologie végétale
Rideau, Marc;  Université de Tours > Pharmacie > Biologie Cellulaire
Huault, Claude;  Université de Caen Basse-Normandie > Physiologie et Biochimie Végétales
Billard, Jean Pierre;  Université de Caen Basse-Normandie > Physiologie et Biochimie Végétales
Foidart, Jean-Michel ;  Université de Liège - ULiège > Département des sciences cliniques > Gynécologie - Obstétrique - Labo de biologie des tumeurs et du développement
Language :
English
Title :
Shemin Pathway and Peroxidase Deficiency in a Fully Habituated and Fully Heterotrophic Non-Organogenic Sugarbeet Callus: An Adaptative Strategy or the Consequence of Modified Hormonal Balances and Sensitivities in These Cancerous Cells? A Review an
Publication date :
October 1999
Journal title :
Cell Proliferation
ISSN :
0960-7722
eISSN :
1365-2184
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
32
Issue :
5
Pages :
249-70
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 December 2008

Statistics


Number of views
102 (1 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
2
Scopus citations®
without self-citations
0
OpenCitations
 
3

Bibliography


Similar publications



Contact ORBi