Article (Scientific journals)
Effect of polyamines or precursors on the hyperhydricity process in micropropagated apple trees.
Tabart, Jessica; Franck, Thierry; Kevers, Claire et al.
2014In Plant Cell, Tissue and Organ Culture
Peer reviewed
 

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Keywords :
Antioxidant Capacity; Hyperhydricity; Apple tree; phenolamides
Abstract :
[en] Hyperhydricity is a physiological disorder affecting tissue-culture-generated plants. It is associated with excessive hydration and poor lignification. The effects of exogenous polyamines (spermidine and putrescine) and polyamine precursors (arginine and ornithine) were studied on ‘Jonagold’ apple shoots subjected to hyperhydric conditions for one in vitro multiplication cycle (28 days) on a culture medium containing gelrite as gelling agent. Supplementation of the gelrite-containing medium with 10-5 M spermidine, ornithine, or arginine reduced the percentage of hyperhydricity by at least 50%. Exogenous supplementation with spermidine or a polyamine precursor also caused total phenolics and the antioxidant capacity (measured by ORAC and DPPH assays) to decrease in shoots during the first two weeks. These results suggest an important role of spermidine and its precursor ornithine in countering hyperhydricity. Supplementation could help to maintain high endogenous levels of polyamines and phenolamides necessary for cell osmoregulation, antioxidant protection, cell wall cross-linking, and plant growth regulation.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Tabart, Jessica ;  Université de Liège - ULiège > Département des sciences de la vie > Département des sciences de la vie
Franck, Thierry  ;  Université de Liège - ULiège > Centre de l'oxygène : Recherche et développement (C.O.R.D.)
Kevers, Claire ;  Université de Liège - ULiège > Département des sciences de la vie > Département des sciences de la vie
Dommes, Jacques ;  Université de Liège - ULiège > Département des sciences de la vie > Biologie moléculaire et biotechnologie végétales
Language :
English
Title :
Effect of polyamines or precursors on the hyperhydricity process in micropropagated apple trees.
Publication date :
2014
Journal title :
Plant Cell, Tissue and Organ Culture
ISSN :
0167-6857
eISSN :
1573-5044
Publisher :
Springer Science & Business Media B.V., Dordrecht, Netherlands
Peer reviewed :
Peer reviewed
Available on ORBi :
since 22 July 2014

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