Seasonal dynamics of foliar antioxidative enzymes and total anthocyanins in natural populations of Iris pumila L.
作者机构：Department of Evolutionary BiologySinisa Stankovic Institute for Biological ResearchBelgradeSerbia Department of BiochemistrySinisa Stankovic Institute for Biological ResearchBelgradeSerbia
出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)
年 卷 期：2010年第3卷第1期
页 面：59-69页
核心收录：
学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学]
基 金：Ministry of Science and Technological Development of the Republic of Serbia(143033)
主 题：SOD CAT POD anthocyanins seasonal variation
摘 要：Aims 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 *** of plants to stressful environmental conditions usually induce overproduction of reactive oxygen species(ROS)that,as highly toxic derivatives of O_(2),can assault all cell macromolecules,leading to the disruption of cellular homeostasis and,consequently,the uncoupling of major metabolic processes,the photosynthesis and *** order to minimize ROS-mediated cellular damage,plants have evolved highly efficient antioxidative defense systems that include both enzymatic and non-enzymatic *** 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 *** We selected two natural populations of *** inhabiting the alternative radiation environments in the Deliblato Sands,a sunexposed dune site and a woodland *** specific activity of three antioxidative enzymes,superoxide dismutase(SOD),catalase(CAT)and peroxidase(POD)and the content of total anthocyanins were examined in leaves of *** plants collected from each of the 31 Iris clones(17 in the exposed population and 14 in the shaded population)once during each of the three seasons,spring,summer and autumn in ***,a fully expanded leaf was cut from each clonal plant between 15:00 and 16:00 h,immediately frozen in liquid nitrogen and stored at-70℃until *** Findings Generally,all three antioxidative enzymes were up-regulated in summer-harvested
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