Bridging a Gap between Cr(VI)-Induced Oxidative Stress and Genotoxicity in Lettuce Organs after a Long-Term Exposure
Joint Authors
Silva, Sónia
Monteiro, Cristina
Sario, Sara
Mendes, Rafael
Mariz-Ponte, Nuno
Santos, Conceição
Dias, Maria Celeste
Bastos, V.
Oliveira, Helena
Source
International Journal of Agronomy
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-04-19
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Chromium (Cr) contamination in arable soils and irrigating water remains a priority, particularly due to the challenges posed to crop production and food safety.
Long-term Cr(VI) effects remain less addressed than short-term ones, particularly regarding organ-specific genotoxic profiles.
Here we used the crop Lactuca sativa growing in a protected horticultural system and irrigated for 21 days with Cr(VI) (up to 200 mg/L).
Besides the oxidative stress, the genotoxicity was evaluated.
Shoots and roots showed distinctive oxidative stress status and genotoxic effects, in a dose-dependent manner.
While 50 mg/L stimulated antioxidant activities and no major genotoxic effects were found, plants exposed to ≥150 showed an increase of oxidative disorders, together with cytostatic and DNA damage effects, and some mitotic impairment.
Leaves showed less oxidative signs at 50 mg/L, while at 150/200 mg/L the antioxidant battery was stimulated.
In Cr treated plants, the highest dose increased the DNA damage, reinforcing the idea that DNA breaks were related to mitotic disorders in higher doses.
In conclusion, long-term exposure data show a highly responsive root, with a quadratic response meaning higher defenses at lower Cr doses, and higher oxidative and DNA damage and cytostatic effect at a higher dose.
American Psychological Association (APA)
Monteiro, Cristina& Sario, Sara& Mendes, Rafael& Mariz-Ponte, Nuno& Silva, Sónia& Oliveira, Helena…[et al.]. 2018. Bridging a Gap between Cr(VI)-Induced Oxidative Stress and Genotoxicity in Lettuce Organs after a Long-Term Exposure. International Journal of Agronomy،Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1166209
Modern Language Association (MLA)
Monteiro, Cristina…[et al.]. Bridging a Gap between Cr(VI)-Induced Oxidative Stress and Genotoxicity in Lettuce Organs after a Long-Term Exposure. International Journal of Agronomy No. 2018 (2018), pp.1-8.
https://search.emarefa.net/detail/BIM-1166209
American Medical Association (AMA)
Monteiro, Cristina& Sario, Sara& Mendes, Rafael& Mariz-Ponte, Nuno& Silva, Sónia& Oliveira, Helena…[et al.]. Bridging a Gap between Cr(VI)-Induced Oxidative Stress and Genotoxicity in Lettuce Organs after a Long-Term Exposure. International Journal of Agronomy. 2018. Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1166209
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1166209