Multiple effects of silicon on alleviation of nickel toxicity in young maize roots.

Autor: Vaculík M; Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dubravska cesta 9, SK-845 23 Bratislava, Slovakia; Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovicova 6, SK-842 15 Bratislava, Slovakia. Electronic address: marek.vaculik@uniba.sk., Kováč J; Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dubravska cesta 9, SK-845 23 Bratislava, Slovakia; Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovicova 6, SK-842 15 Bratislava, Slovakia., Fialová I; Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dubravska cesta 9, SK-845 23 Bratislava, Slovakia., Fiala R; Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dubravska cesta 9, SK-845 23 Bratislava, Slovakia., Jašková K; Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dubravska cesta 9, SK-845 23 Bratislava, Slovakia., Luxová M; Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Dubravska cesta 9, SK-845 23 Bratislava, Slovakia.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2021 Aug 05; Vol. 415, pp. 125570. Date of Electronic Publication: 2021 Mar 16.
DOI: 10.1016/j.jhazmat.2021.125570
Abstrakt: Although beneficial metalloid silicon (Si) has been shown to alleviate the toxicity of various heavy metals, there is a lack of knowledge about the role of Si in possible alleviation of phytotoxicity caused by excess of essential nickel (Ni). In the present study we investigated the growth and biomass production, reactive oxygen species (ROS) formation and activities of selected antioxidants, as well as combined effect of Ni and Si on the integrity of cell membranes and electrolyte leakage in young maize roots treated for 24, 48 and 72 h with excess of Ni and/or Si. By histochemical methods we also visualized Ni distribution in root tissues and compared the uptake of Ni and Si with the development of root apoplasmic barriers. Ni enhanced the root lignification and suberization and shifted the development of apoplasmic barriers towards the root tip. Similarly, localization of Ni correlated with lignin and suberin deposition in root endodermis, further supporting the barrier role of this tissue in Ni uptake. Si reversed the negative impact of Ni on root anatomy. Additionally, improved cell membrane integrity, and enhanced ascorbate-based antioxidant system might be the mechanisms how Si partially mitigates the deleterious effects of Ni excess in maize plants.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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