Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/104621
Title: Genotoxicity and Cytotoxicity Induced in Zygophyllum fabago by Low Pb Doses Depends on the Population’s Redox Plasticity
Authors: López-Orenes, Antonio
Santos, Conceição
Dias, Maria Celeste 
Oliveira, Helena
Ferrer, María Á.
Calderón, Antonio A.
Silva, Sónia
Keywords: antioxidant response; cytotoxicity; genotoxicity; Pb tolerance; phytotoxicity
Issue Date: 2021
Publisher: MDPI
Project: UI0183-UID/BIA/04004/2020 
UID/QUI/00062/2019 
LAQV-REQUIMTE UIDB/50006/2020 
UIDP/50017/2020 
UIDB/50017/2020 
SFRH/BPD/100865/2014 
SFRH/BPD/74299/2010 
Spanish Government (CGL2006-11569 and CTM2011-23958) 
Fundación Séneca (project FB/23/FS/ 02) 
mobility grants (AP2012-2559 and EST13/00414) 
Serial title, monograph or event: Horticulturae
Volume: 7
Issue: 11
Abstract: Lead (Pb) soil contamination remains a major ecological challenge. Zygophyllum fabago is a candidate for the Pb phytostabilisation of mining tailings; nevertheless, the cytogenotoxic effects of low doses of Pb on this species are still unknown. Therefore, Z. fabago seeds collected from non-mining (NM) and mining (M) areas were exposed to 0, 5 and 20 M Pb for four weeks, after which seedling growth, Pb cytogenotoxic effects and redox status were analyzed. The data revealed that Pb did not affect seedling growth in M populations, in contrast to the NM population. Cell cycle progression delay/arrest was detected in both NM and M seedlings, mostly in the roots. DNA damage (DNAd) was induced by Pb, particularly in NM seedlings. In contrast, M populations, which showed a higher Pb content, exhibited lower levels of DNAd and protein oxidation, together with higher levels of antioxidants. Upon Pb exposure, reduced glutathione (GSH) and non-protein thiols were upregulated in shoots and were unaffected/decreased in roots from the NM population, whereas M populations maintained higher levels of flavanols and hydroxycinnamic acids in shoots and triggered GSH in roots and shoots. These differential organ-specific mechanisms seem to be a competitive strategy that allows M populations to overcome Pb toxicity, contrarily to NM, thus stressing the importance of seed provenance in phytostabilisation programs.
URI: https://hdl.handle.net/10316/104621
ISSN: 2311-7524
DOI: 10.3390/horticulturae7110455
Rights: openAccess
Appears in Collections:I&D CFE - Artigos em Revistas Internacionais

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