Arsenic-induced oxidative stress and antioxidant response of Festuca rubra L. growing on fly ash deposits
2015
Аутори:
Gajić, GordanaĐurđević, Lola
Kostić, Olga
Jarić, Snežana
Mitrović, Miroslava
Pavlović, Dragana
Pavlović, Pavle
Остала ауторства
Uzelac, BrankaТип документа:
Конференцијски прилог (Објављена верзија)
,
© 2015 by the Serbian Plant Physiology Society
Метаподаци
Приказ свих података о документуАпстракт:
Arsenic (As) is a highly toxic metalloid present in fly ash (FA) generated from coal combustion in ther-mal power plants and has been recognized as an environmental and human health hazard. Therefore, arse-nic phytoremediation of fly ash requires suitable plant species that are tolerant to high levels of arsenic in the aboveground tissue. This study examined the metabolic adaptation of Festuca rubra L. under arsenic stress. Field studies were carried out in May 2009 on passive FA lagoons of thermoelectric power plant ’Nikola Tesla – A’ in Obrenovac (L3 – 3-year-old lagoons; L2 – 11-year-old lagoons) and in Botanical Garden ’Jevremovac’ in Belgrade (CS – control site). Concentrations of As in leaves of F. rubra at L3 and L2 (5.08 and 4.80 µg g-1, re-spectively) were elevated in comparison to CS (3.43 µg g-1). Arsenic accumulation caused oxidative stress in F. rubra leaves at both FA sites, as indicated by significant increases in MDA levels (p<0.05; p<0.001). High con-centrations of As reduced the efficiency of PSII photochemistry (Fv/Fm), chlorophylls and carotenoids content (p<0.001). However, with increase in the concentration of As, the content of anthocyanins, phenolics and ascorbic acid as well as DPPH radical scavenging activity in leaves of F. rubra increased at both FA sites (p<0.001). Results of our study indicate that in spite of high oxidative stress and reduced photosynthetic efficiency, this grass species is characterized by significant activation of the antioxidant protection under arsenic stress. There-fore, F. rubra possesses high adaptive potential to grow and survive hostile conditions on fly ash deposits.
Кључне речи:
arsenic; Festuca rubra; fly ash; oxidative stress; adaptationsФинансирање / пројекти:
- Екофизиолошке адаптивне стратегије биљака у условима мултипног стреса (RS-MESTD-Basic Research (BR or ON)-173018)
У:
- Uzelac B, editor. Book of Abstracts: 2nd International Conference on Plant Biology, 21th Symposium of the Serbian Plant Physiology Society, and CОST Action FA1106 Quality Fruit Workshop; 2015 Jun 17-20; Petnica, Serbia. Belgrade: Serbian Plant Physiology Society: Institute for Biological Research “Siniša Stanković”; 2015. p. 161-2.