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From promoting aggregation to enhancing obstruction: A negative feedback regulatory mechanism of alleviation of trivalent chromium toxicity by silicon in rice

Authorized Users Only
2023
Authors
Pang, Zhihao
Mei, Yuchao
Nikoilic, Nina
Nikolic, Miroslav
Li, Tingqiang
Peng, Hongyun
Liang, Yongchao
Article (Published version)
,
Elsevier B.V.
Metadata
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Abstract
Trivalent chromium [Cr(III)] is a threat to the environment and crop production. Silicon (Si) has been shown to be effective in mitigating Cr(III) toxicity in rice. However, the mechanisms by which Si reduces Cr(III) uptake in rice are unclear. Herein, we hypothesized that the ability of Si to obstruct Cr(III) diffusion via apoplastic bypass is related to silicic acid polymerization, which may be affected by Cr(III) in rice roots. To test this hypothesis, we employed hydroponics experiments on rice (Oryza sativa L.) and utilized apoplastic bypass tracer techniques, as well as model simulations, to investigate 1) the effect of Si on Cr(III) toxicity and its obstruction capacity via apoplastic bypass, 2) the effect of Cr(III) on silicic acid polymerization, and 3) the relationship between the degree of silicic acid polymerization and its Cr(III) obstruction capacity. We found that Si reversed the damage caused by Cr(III) stress in rice. Si exerted an obstruction effect in the apoplast, s...ignificantly decreasing the share of Cr(III) uptake via the apoplastic bypass from 18% to 11%. Moreover, Cr(III) reduced silica particles' radii and increased Si concentration in roots. Modeling revealed that a 5-fold reduction in their radii decreased the diffusion of Cr(III) in apoplast by approximately 17%. We revealed that Cr(III) promoted silicic acid polymerization, resulting in the formation of a higher number of Si particles with a smaller radius in roots, which in turn increased the ability of Si to obstruct Cr(III) diffusion. This negative feedback regulatory mechanism is novel and crucially important for maintaining homeostasis in rice, unveiling the unique role of Si under Cr(III) ion stress and providing a theoretical basis for promoting the use of Si fertilizer in the field.

Keywords:
Apoplastic obstruction / Chromium / Rice / Silicic acid polymerization / Silicon
Source:
Journal of Hazardous Materials, 2023, 457, 131720-
Publisher:
  • Elsevier
Funding / projects:
  • National Natural Science Foundation of China (Approved No. 32272799)
  • Funda- mental Research Funds for the Central Universities (226–2023-00077)
  • National Key Research and Development Program of China (Approved No. 2018YFD0800202)

DOI: doi.org/10.1016/j.jhazmat.2023.131720

ISSN: 2666-9110

[ Google Scholar ]
URI
http://rimsi.imsi.bg.ac.rs/handle/123456789/1978
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Institut za multidisciplinarna istraživanja
TY  - JOUR
AU  - Pang, Zhihao
AU  - Mei, Yuchao
AU  - Nikoilic, Nina
AU  - Nikolic, Miroslav
AU  - Li, Tingqiang
AU  - Peng, Hongyun
AU  - Liang, Yongchao
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1978
AB  - Trivalent chromium [Cr(III)] is a threat to the environment and crop production. Silicon (Si) has been shown to be effective in mitigating Cr(III) toxicity in rice. However, the mechanisms by which Si reduces Cr(III) uptake in rice are unclear. Herein, we hypothesized that the ability of Si to obstruct Cr(III) diffusion via apoplastic bypass is related to silicic acid polymerization, which may be affected by Cr(III) in rice roots. To test this hypothesis, we employed hydroponics experiments on rice (Oryza sativa L.) and utilized apoplastic bypass tracer techniques, as well as model simulations, to investigate 1) the effect of Si on Cr(III) toxicity and its obstruction capacity via apoplastic bypass, 2) the effect of Cr(III) on silicic acid polymerization, and 3) the relationship between the degree of silicic acid polymerization and its Cr(III) obstruction capacity. We found that Si reversed the damage caused by Cr(III) stress in rice. Si exerted an obstruction effect in the apoplast, significantly decreasing the share of Cr(III) uptake via the apoplastic bypass from 18% to 11%. Moreover, Cr(III) reduced silica particles' radii and increased Si concentration in roots. Modeling revealed that a 5-fold reduction in their radii decreased the diffusion of Cr(III) in apoplast by approximately 17%. We revealed that Cr(III) promoted silicic acid polymerization, resulting in the formation of a higher number of Si particles with a smaller radius in roots, which in turn increased the ability of Si to obstruct Cr(III) diffusion. This negative feedback regulatory mechanism is novel and crucially important for maintaining homeostasis in rice, unveiling the unique role of Si under Cr(III) ion stress and providing a theoretical basis for promoting the use of Si fertilizer in the field.
PB  - Elsevier
T2  - Journal of Hazardous Materials
T1  - From promoting aggregation to enhancing obstruction: A negative feedback regulatory mechanism of alleviation of trivalent chromium toxicity by silicon in rice
SP  - 131720
VL  - 457
DO  - doi.org/10.1016/j.jhazmat.2023.131720
ER  - 
@article{
author = "Pang, Zhihao and Mei, Yuchao and Nikoilic, Nina and Nikolic, Miroslav and Li, Tingqiang and Peng, Hongyun and Liang, Yongchao",
year = "2023",
abstract = "Trivalent chromium [Cr(III)] is a threat to the environment and crop production. Silicon (Si) has been shown to be effective in mitigating Cr(III) toxicity in rice. However, the mechanisms by which Si reduces Cr(III) uptake in rice are unclear. Herein, we hypothesized that the ability of Si to obstruct Cr(III) diffusion via apoplastic bypass is related to silicic acid polymerization, which may be affected by Cr(III) in rice roots. To test this hypothesis, we employed hydroponics experiments on rice (Oryza sativa L.) and utilized apoplastic bypass tracer techniques, as well as model simulations, to investigate 1) the effect of Si on Cr(III) toxicity and its obstruction capacity via apoplastic bypass, 2) the effect of Cr(III) on silicic acid polymerization, and 3) the relationship between the degree of silicic acid polymerization and its Cr(III) obstruction capacity. We found that Si reversed the damage caused by Cr(III) stress in rice. Si exerted an obstruction effect in the apoplast, significantly decreasing the share of Cr(III) uptake via the apoplastic bypass from 18% to 11%. Moreover, Cr(III) reduced silica particles' radii and increased Si concentration in roots. Modeling revealed that a 5-fold reduction in their radii decreased the diffusion of Cr(III) in apoplast by approximately 17%. We revealed that Cr(III) promoted silicic acid polymerization, resulting in the formation of a higher number of Si particles with a smaller radius in roots, which in turn increased the ability of Si to obstruct Cr(III) diffusion. This negative feedback regulatory mechanism is novel and crucially important for maintaining homeostasis in rice, unveiling the unique role of Si under Cr(III) ion stress and providing a theoretical basis for promoting the use of Si fertilizer in the field.",
publisher = "Elsevier",
journal = "Journal of Hazardous Materials",
title = "From promoting aggregation to enhancing obstruction: A negative feedback regulatory mechanism of alleviation of trivalent chromium toxicity by silicon in rice",
pages = "131720",
volume = "457",
doi = "doi.org/10.1016/j.jhazmat.2023.131720"
}
Pang, Z., Mei, Y., Nikoilic, N., Nikolic, M., Li, T., Peng, H.,& Liang, Y.. (2023). From promoting aggregation to enhancing obstruction: A negative feedback regulatory mechanism of alleviation of trivalent chromium toxicity by silicon in rice. in Journal of Hazardous Materials
Elsevier., 457, 131720.
https://doi.org/doi.org/10.1016/j.jhazmat.2023.131720
Pang Z, Mei Y, Nikoilic N, Nikolic M, Li T, Peng H, Liang Y. From promoting aggregation to enhancing obstruction: A negative feedback regulatory mechanism of alleviation of trivalent chromium toxicity by silicon in rice. in Journal of Hazardous Materials. 2023;457:131720.
doi:doi.org/10.1016/j.jhazmat.2023.131720 .
Pang, Zhihao, Mei, Yuchao, Nikoilic, Nina, Nikolic, Miroslav, Li, Tingqiang, Peng, Hongyun, Liang, Yongchao, "From promoting aggregation to enhancing obstruction: A negative feedback regulatory mechanism of alleviation of trivalent chromium toxicity by silicon in rice" in Journal of Hazardous Materials, 457 (2023):131720,
https://doi.org/doi.org/10.1016/j.jhazmat.2023.131720 . .

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