Accumulation, root-shoot translocation and phytotoxicity of substituted polycyclic aromatic hydrocarbons in wheat

Yang, Huiqiang; Zhu, Zhili; Zhou, Jian; Wang, Zhibin; Chen, Jiping; Li, Aorui; Wang, Chi; Zhang, Chi; Dai, Yunchao; Jia, Hanzhong

doi:10.1007/s10311-023-01614-1

Cited by 4 publications

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“…As shown in Figure , the concentrations of nitro-PAHs in all of the crop roots slightly decreased in the presence of AgNO 3 and glycerol (ANOVA, P > 0.05), indicating that their uptake by crop roots was insensitive to water channel inhibitors. A previous study also demonstrated that the uptake of 1-NO 2 -Pyr by wheat roots was inappreciably affected by water channel inhibitors . A similar phenomenon was observed for perfluoroalkanesulfonic acids (PFSAs) such as PFOS and PFHxS. , Water channels, a type of membrane proteins, can transport water and hydrophilic solutes depending on the size of the holes. , Since nitro-PAHs have relatively high hydrophobicity (log K ow > 4.16, Table S1), it is quite difficult for them to be absorbed via water channels.…”

Section: Resultsmentioning

confidence: 68%

“…A previous study also demonstrated that the uptake of 1-NO 2 -Pyr by wheat roots was inappreciably affected by water channel inhibitors. 56 A similar phenomenon was observed for perfluoroalkanesulfonic acids (PFSAs) such as PFOS and PFHxS. 25,57 Water channels, a type of membrane proteins, can transport water and hydrophilic solutes depending on the size of the holes.…”

Section: ■ Results and Discussionmentioning

confidence: 74%

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Novel Insights into the Promoted Accumulation of Nitro-Polycyclic Aromatic Hydrocarbons in the Roots of Legume Plants

Yang,

Zhang,

Yan

et al. 2024

Environ. Sci. Technol.

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Substituted polycyclic aromatic hydrocarbons (sub-PAHs) are receiving increased attention due to their high toxicity and ubiquitous presence. However, the accumulation behaviors of sub-PAHs in crop roots remain unclear. In this study, the accumulation mechanism of sub-PAHs in crop roots was systematically disclosed by hydroponic experiments from the perspectives of utilization, uptake, and elimination. The obtained results showed an interesting phenomenon that despite not having the strongest hydrophobicity among the five sub-PAHs, nitro-PAHs (including 9-nitroanthracene and 1-nitropyrene) displayed the strongest accumulation potential in the roots of legume plants, including mung bean and soybean. The nitrogen-deficient experiments, inhibitor experiments, and transcriptomics analysis reveal that nitro-PAHs could be utilized by legumes as a nitrogen source, thus being significantly absorbed by active transport, which relies on amino acid transporters driven by H+-ATPase. Molecular docking simulation further demonstrates that the nitro group is a significant determinant of interaction with an amino acid transporter. Moreover, the depuration experiments indicate that the nitro-PAHs may enter the root cells, further slowing their elimination rates and enhancing the accumulation potential in legume roots. Our results shed light on a previously unappreciated mechanism for root accumulation of sub-PAHs, which may affect their biogeochemical processes in soils.

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