Bioaccumulation and oxidative stress impact of Pb, Ni, Cu, and Cr heavy metals in two bryophyte species, Pleurochaete squarrosa and Timmiella barbuloides
| Autor: | Lale Yildiz Aktaş, Bengi Erdağ, Serap Kurt Aydoğan |
|---|---|
| Přispěvatelé: | Ege Üniversitesi |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Antioxidant antioxidant medicine.medical_treatment chemistry.chemical_element Plant Science 010501 environmental sciences medicine.disease_cause 01 natural sciences Pleurochaete squarrosa Timmiella barbuloides lead nickel copper chromium antioxidant oxidative stress bioaccumulation Metal chemistry.chemical_compound Chromium nickel Botany medicine oxidative stress Hydrogen peroxide 0105 earth and related environmental sciences lead Chemistry Timmiella barbuloides Copper Bitki Bilimleri bioaccumulation visual_art Environmental chemistry Bioaccumulation Pleurochaete squarrosa copper visual_art.visual_art_medium Phytotoxicity chromium Biyoloji Oxidative stress 010606 plant biology & botany |
| Zdroj: | Volume: 41, Issue: 5 464-475 Turkish Journal of Botany |
| ISSN: | 1300-008X 1303-6106 |
| Popis: | WOS: 000412673000004 This study was conducted to evaluate the bioaccumulation and oxidative stress impact of lead (Pb), nickel (Ni), copper (Cu), and chromium (Cr) in bryophyte species Pleurochaete squarrosa and Timmiella barbuloides exposed to Pb, Ni, Cu, and Cr at 1 mM concentration for 48 h. Bioaccumulation ratios in the non-Fenton metals Ni and Pb were found to be higher than in Fenton metals Cu and Cr for both moss species. Except for Cu, high levels of heavy metal accumulation caused a slight increase in dry weights of both species. Total chlorophyll and carotenoid contents of both species showed variations under Ni, Pb, and Cr stress; however, a Cu-induced decrease in the chl a/b ratio revealed prominent toxicity of the metal in both species. Copper and chromium provoked hydrogen peroxide (H2O2) increase in both species, but it was more prominent in P. squarrosa. Ni treatment also induced H2O2 accumulation in the species, but membrane damage was only observed in Cu-exposed samples of both species. Ni- ,Pb-, Cu-, and Cr- induced oxidative stress was alleviated by different metal- and species-specific antioxidant components in both species. These findings indicate that both species are sensitive to Cu, and induced antioxidant components are not enough to overcome the phytotoxic effect of the metal. Accumulated Ni-, Pb-, and Cr- driven toxicity seems to be tolerated by reducing heavy metal access to the cytoplasm of the cells, as well as by stimulating different components of antioxidant defense in the cells of both species; however, this was more prominent in T. barbuloides than P. squarrosa. Adnan Menderes UniversityAdnan Menderes University [FEF11011] This study was supported by the Scientific Research Projects of Adnan Menderes University (Grant Number FEF11011). |
| Databáze: | OpenAIRE |
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