Seasonal dynamics of foliar antioxidative enzymes and total anthocyanins in natural populations of Iris pumila L.
2010
Document Type:
Article (Published version)
,
© The Author 2009. Published by Oxford University Press on behalf of the Institute of Botany, Chinese Academy of Sciences and the Botanical Society of China.
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Show full item recordAbstract:
Plants in their natural habitats frequently cope with a multitude of abiotic stresses, such as high light intensity, extreme temperatures and water deficit, which often co-occur during periods of drought, especially in semi-arid and arid regions. Exposure of plants to stressful environmental conditions usually induce overproduction of reactive oxygen species (ROS) that, as highly toxic derivatives of O2, can assault all cell macromolecules, leading to the disruption of cellular homeostasis and, consequently, the uncoupling of major metabolic processes, the photosynthesis and photorespiration. In order to minimize ROS-mediated cellular damage, plants have evolved highly efficient antioxidative defense systems that include both enzymatic and non-enzymatic components. Since abiotic stress can also operate as a strong evolutionary force that shapes adaptations in natural plant populations, the aim of this study was to examine the seasonal variation patterns of two distinct antioxidative systems, ROS-scavenging enzymes and anthocyanin pigments, in the leaf tissue of a steppe plant, Iris pumila, as expressed under contrasting light conditions that the species regularly experiences in the wild.
Keywords:
SOD; CAT; POD; anthocyanins; seasonal variationSource:
Journal of Plant Ecology, 2010, 3, 1, 59-69Funding / projects:
- Fiziološki i evolucioni aspekti stresnog odgovora u prirodnim i laboratorijskim populacijama (RS-MESTD-MPN2006-2010-143033)
DOI: 10.1093/jpe/rtp019
ISSN: 1752-9921