Title: Sugar ratios, glutathione redox status and phenols in the resurrection species Haberlea rhodopensis and the closely related non-resurrection species Chirita eberhardtii
Authors: Djilianov, D
Ivanov, S
Moyankova, D
Miteva, L
Kirova, E
Alexieva, V
Joudi, M
Peshev, Darin
Van den Ende, Wim # ×
Issue Date: Jun-2011
Publisher: G. Thieme Verlag
Series Title: Plant Biology vol:13 issue:5 pages:767-776
Abstract: Because of their unique tolerance to desiccation, the so-called resurrection plants
can be considered as excellent models for extensive research on plant reactions to
environmental stresses. The vegetative tissues of these species are able to withstand
long dry periods and to recover very rapidly upon re-watering. This study follows
the dynamics of key components involved in leaf tissue antioxidant systems under
desiccation in the resurrection plant Haberlea rhodopensis and the related non-resurrection
species Chirita eberhardtii. In H. rhodopensis these parameters were also
followed during recovery after full drying. A well-defined test system was developed
to characterise the different responses of the two species under drought stress.
Results show that levels of H2O2 decreased significantly both in H. rhodopensis and
C. eberhardtii, but that accumulation of malondialdehyde was much more pronounced
in the desiccation-tolerant H. rhodopensis than in the non-resurrection
C. eberhardtii. A putative protective role could be attributed to accumulation of
total phenols in H. rhodopensis during the late stages of drying. The total glutathione
concentration and GSSG ⁄GSH ratio increased upon complete dehydration of
H. rhodopensis. Our data on soluble sugars suggest that sugar ratios might be
important for plant desiccation tolerance. An array of different adaptations could
thus be responsible for the resurrection phenotype of H. rhodopensis.
ISSN: 1435-8603
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Physiology of Plants and Micro-organisms Section - miscellaneous
Laboratory for Molecular Plant Physiology (-)
× corresponding author
# (joint) last author

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