Article (Scientific journals)
Hyperhydricity of micropropagated shoots: a typically stress-induced change of physiological state
Kevers, Claire; Franck, Thierry; Strasser, Reto et al.
2004In Plant Cell, Tissue and Organ Culture, 77 (2), p. 181-191
Peer reviewed
 

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Keywords :
hyperhydricity; JKB-trilogy; micropropagation; state change; stress concept
Abstract :
[en] Hyperhydricity of micropropagated shoots, formerly called vitrification, undoubtedly results from growth and culture conditions, subjectively reputated as stressing factors: wounding, infiltration of soft culture medium, generally of a high ionic strength, rich in nitrogen and in growth regulators in a special balance, in a humid and gaseous confined atmosphere. Stress is (objectively) defined as a disruption of homeostasis resulting from a constraint escaping the usual flexibility of metabolism. It induces another temporary (reversible) or definitive (irreversible) thermodynamic physiological state. The state-change concept developed by Strasser (1988) and Strasser and Tsimilli-Michael (2001) is applicable to the phenomenon of hyperhydricity. An appraisal of the redox capacities of hyperhydrated shoots together with a study of some enzymic activities that catalyse pentose phosphate and glycolytic pathways has indeed shown that such shoots have evolved towards a temporary state of lower differentiation or a juvenile state with a sufficient activity to survive and to defend themselves.
Disciplines :
Microbiology
Phytobiology (plant sciences, forestry, mycology...)
Biotechnology
Author, co-author :
Kevers, Claire ;  Université de Liège - ULiège > Département des sciences de la vie > Biologie moléculaire et biotechnologie végétales
Franck, Thierry  ;  Université de Liège - ULiège > Département clinique des animaux de compagnie et des équidés > Anesthésiologie gén. et pathologie chirurg. des grds animaux
Strasser, Reto;  Université de Genève - UNIGE > Laboratoire de Bioénergétique
Dommes, Jacques ;  Université de Liège - ULiège > Département des sciences de la vie > Biologie moléculaire et biotechnologie végétales
Gaspar, Thomas ;  Botanique, radiobotanique & serres expér.
Language :
English
Title :
Hyperhydricity of micropropagated shoots: a typically stress-induced change of physiological state
Publication date :
May 2004
Journal title :
Plant Cell, Tissue and Organ Culture
ISSN :
0167-6857
eISSN :
1573-5044
Publisher :
Kluwer Academic Publ, Dordrecht, Netherlands
Volume :
77
Issue :
2
Pages :
181-191
Peer reviewed :
Peer reviewed
Available on ORBi :
since 28 December 2008

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