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Adaptive flexibility of enzymatic antioxidants SOD, APX and CAT to high light stress: The clonal perennial monocot Iris pumila as a study case

2016
Аутори:
Vuleta, Ana
Manitašević Jovanović, Sanja
Tucić, Branka
Тип документа:
Чланак у часопису
Метаподаци
Приказ свих података о документу
Апстракт:
High solar radiation has been recognized as one of the main causes of the overproduction of reactive oxygen species (ROS) and oxidative stress in plants. To remove the excess of ROS, plants use different antioxidants and tune their activity and/or isoform number as required for given light conditions. In this study, the adaptiveness of light-induced variation in the activities and isoform patterns of key enzymatic antioxidants SOD, APX and CAT was tested in leaves of Iris pumila clonal plants from two natural populations inhabiting a sun exposed dune site and a forest understory, using a reciprocal-transplant experiment. At the exposed habitat, the mean enzymatic activity of total SODs was significantly greater than that in the shaded one, while the amount of the mitochondrial MnSOD was notably higher compared to the plastidic Cu/ZnSOD. However, the number of Cu/ZnSOD isoforms was greater in the forest understory relative to the exposed site (three vs. two, respectively). An inverse relationship recorded between the quantities of MnSOD and Cu/ZnSOD in alternative light habitats might indicate that the two enzymes compensate each other in maintaining intracellular ROS and redox balance. The adaptive population differentiation in APX activity was exclusively recorded in the open habitat, which indicated that the synergistic effect of high light and temperature stress could be the principal selective factor, rather than high light alone. The enzymatic activity of CAT was similar between the two populations, implicating APX as the primary H2O2 scavenger in the I. pumila leaves exposed to high light intensity.
Кључне речи:
Adaptive phenotypic plasticity; Ascorbate peroxidase; Catalase; Iris pumila; Local adaptation; Reciprocal transplant experiment; Superoxide dismutase
У: Plant Physiology and Biochemistry (2016), 100: 166-173

DOI: 10.1016/j.plaphy.2016.01.011

PubMed: 26841194

WoS: 000371553500018

Scopus: 2-s2.0-84958247837
[ Google Scholar ]
URI
http://www.ncbi.nlm.nih.gov/pubmed/26841194
http://linkinghub.elsevier.com/retrieve/pii/S0981942816300109
http://ibiss-r.rcub.bg.ac.rs/123456789/2597
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IBISS
APA:
Vuleta, A., Manitašević Jovanović, S., & Tucić, B. (2016). Adaptive flexibility of enzymatic antioxidants SOD, APX and CAT to high light stress: The clonal perennial monocot Iris pumila as a study case. Plant Physiology and Biochemistry, 100, 166–173.
Vancouver:
Vuleta A, Manitašević Jovanović S, Tucić B. Adaptive flexibility of enzymatic antioxidants SOD, APX and CAT to high light stress: The clonal perennial monocot Iris pumila as a study case. Plant Physiol Biochem. 2016;100:166–73.

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