PJB-2023-8
Phytotoxity of polycyclic aromatic hydrocarbons to Salix viminalis L.
Xia Li, Junxiang Liu, Fengzhen Chen, Yunhe Cheng, Yuancheng Wang, Ao Li, Feifei Zhai and Zhenyuan Sun
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are toxic, mutagenic, and carcinogenic, causing serious risks to human health and ecosystem security. High concentrations of pollutants can cause growth inhibition and even survival stress to plants. This work aimed to explore the phytotoxicity of PAHs to Salix viminalis. In this study, cut seedlings of S. viminalis were subjected to hydroponic experiments under phenanthrene stress to examine changes in gene expression and physiology of willow roots. Under phenanthrene stress, the superoxide anion radical generation rate (O2•−) and malonaldehyde (MDA) content significantly increased. Catalase (CAT) played major role in the detoxification of reactive oxygen species (ROS) in willow roots. Phenanthrene caused osmosis stress in roots, as shown by the increase in proline and soluble sugar content, sucrose synthase SUS3, phosphosucrose synthase SPS4, the sucrose transporters SWEET16 and SUC2, delta-1-pyrroline-5-carboxylate synthetase P5CS, rolyl 4-hydroxylase P4H1. Genes in root cellulose synthesis, some mineral elements transporters and auxin transporters were downregulated, which were adverse to root growth of willow. This study confirmed the toxic pathway of PAHs to willow and would provide a basis for the study of enhancing plant resistance to PAHs and strengthening the application of phytoremediation
To Cite this article:
Li, X., J. Liu, F. Chen, Y. Cheng, Y. Wang, A. Li, F. Zhai and Z. Sun. 2024. Phytotoxity of polycyclic aromatic hydrocarbons to Salix viminalis L. Pak. J. Bot., 56(2): DOI: http://dx.doi.org/10.30848/PJB2024-2(21)
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