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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 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) UIDB/50006/2020 |
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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