Effects of Exogenous Plant Hormone Spraying on the Phytoremediation by Bidens pilosa L. in Cadmium-contaminated Soil

被引：0

作者：

Yang Q. ^{[1
]}

Xie J.-T. ^{[1
]}

Zhang Z.-P. ^{[1
]}

Yang Z. ^{[1
]}

Fang Z.-G. ^{[1
]}

Li Z.-H. ^{[1
]}

Zhao W.-L. ^{[1
]}

Liu H.-J. ^{[1
]}

Du S.-T. ^{[2
]}

机构：

[1] School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou

[2] Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou

来源：

Huanjing Kexue/Environmental Science | 2023年 / 44卷 / 10期

关键词：

exogenous plant hormones; foliage spraying; oxidative stress; phytoremediation; translocation factor;

D O I：

10.13227/j.hjkx.202210352

中图分类号：

学科分类号：

摘要：

To explore the effect of exogenous plant hormone spraying on the absorption of heavy metals by hyperaccumulated plants, Bidens pilosa L. was selected as the tested plant owing to the large biomass, short growth cycle, and high accumulation efficiency. Here, the effect of foliar spraying 6-benzylaminopurine (6-BA), salicylic acid (SA), and 24-epi-brassinosteroid (24-EBR) on the remediation of cadmium (Cd)-contaminated soil by B. pilosa L. was examined. The results showed: 1 the efficiency of the remediation in Cd-contaminated soil by B. pilosa L. was effectively enhanced after the spraying of all three kinds of exogenous plant hormones with appropriate concentrations. The spraying of the three exogenous plant hormones could promote the cadmium concentration in the leaves of B. pilosa L. to increase by 4. 21%, 31. 79%, and 14. 89%; promote the translocation factor (TF) to increase by 9. 67%, 18. 83%, and 17. 85%; promote the phytoextraction rates (PR) to increase by 15. 36%, 32. 33%, and 64. 38%, respectively. 2 The growth of B. pilosa L. was significantly promoted after the spraying of the three kinds of exogenous plant hormones with appropriate concentrations. The spraying of the three exogenous plant hormones could promote plant growth under cadmium stress, and the dry weight of the plant root, stem, and leaf was increased by 37. 53%, 74. 50%, and 104. 02%, respectively. 3 The photosynthesis of B. pilosa L. was significantly enhanced after the spraying of the three kinds of exogenous plant hormones with appropriate concentrations. The chlorophyll concentration of the plant was significantly increased after foliar spraying with plant hormones, and the concentration of chlorophyll a was increased by 79. 31%, 92. 27%, and 51. 12%; the photochemical quenching coefficient (qP) was increased by 11. 32%, 89. 16%, and 78. 43%; and the non-photochemical quenching coefficient (NPQ) was increased by 51. 71%, 241. 12%, and 27. 85%, respectively, after foliar spraying with appropriate concentrations of 6-BA, SA, and 24-EBR. 4- The antioxidant capacity of B. pilosa L. was significantly strengthened after the spraying of the three kinds of exogenous plant hormones with appropriate concentrations. The malondialdehyde (MDA) concentration of the plant was reduced by 62. 41%, 68. 67%, and 46. 76% after the application of 6-BA, SA, and 24-EBR, respectively. Meanwhile, superoxide dismutase (SOD) was increased by 68. 33%, 10. 28%, and 6. 17%, and catalase (CAT) was increased by 31. 43%, 37. 87%, and 37. 31%, respectively. Generally, the spraying of exogenous 6-BA, SA, and 24-EBR with the appropriate concentration under Cd stress could significantly increase the biomass of B. pilosa L. and promote the accumulation of heavy metals in the plant, improve the photosynthetic ability of the plant, reduce the oxidative damage of the plant under heavy metal stress, enhance the antioxidant capacity, and improve the absorption and tolerance of plants to Cd. It also could promote the transfer of Cd from roots to shoots, improve the phytoextraction rates of Cd from the plant, and effectively strengthen the phytoremediation efficiency. Among them, 30 mg·L - 1 SA foliar spraying had the best effect. © 2023 Science Press. All rights reserved.

引用

页码：5757 / 5768

页数：11

共 46 条

[1] Shahriar S, Rahman M M, Naidu R., Geographical variation of cadmium in commercial rice brands in Bangladesh: human health risk assessment [J], Science of the Total Environment, 716, (2020)
[2] Chen Z Q, Liu Q Z, Chen S N, Et al., Roles of exogenous plant growth regulators on phytoextraction of Cd / Pb / Zn by Sedum alfredii Hance in contaminated soils [J], Environmental Pollution, 293, (2022)
[3] Zhang X, Li M, Yang H H, Et al., Physiological responses of Suaeda glauca and Arabidopsis thaliana in phytoremediation of heavy metals, Journal of Environmental Management, 223, pp. 132-139, (2018)
[4] Rena, Machhirake N P, Yadav S, Et al., Toxicity-removal efficiency of Brassica juncea,Chrysopogon zizanioides and Pistia stratiotes to decontaminate biomedical ash under non-chelating and chelating conditions: a pilot-scale phytoextraction study, Chemosphere, 287, (2022)
[5] Dai H P, Wei S H, Twardowska I, Et al., Hyperaccumulating potential of Bidens pilosa L. for Cd and elucidation of its translocation behavior based on cell membrane permeability, Environmental Science and Pollution Research, 24, 29, pp. 23161-23167, (2017)
[6] Zhang Y X, Zhou L, Xiao N C, Et al., Remediation potential of B. pilosa L. in cadmium-contaminated farmland, Acta Ecologica Sinica, 40, 16, pp. 5805-5813, (2020)
[7] Latif J, Akhtar J, Ahmad I, Et al., Unraveling the effects of cadmium on growth, physiology and associated health risks of leafy vegetables, Brazilian Journal of Botany, 43, 4, pp. 799-811, (2020)
[8] Du B Y, Zhou J, Lu B X, Et al., Environmental and human health risks from cadmium exposure near an active lead-zinc mine and a copper smelter, China [J], Science of the Total Environment, 720, (2020)
[9] Yang Q, Yang C, Yu H, Et al., The addition of degradable chelating agents enhances maize phytoremediation efficiency in Cd-contaminated soils, Chemosphere, 269, (2021)
[10] Gao L, Liu Y C, Guo X F, Et al., Effect and mechanism of sulfate-reducing bacteria on the passivation of heavy metals in alkaline and acidic agricultural soils, Environmental Science, 43, 12, pp. 5789-5797, (2022)

← 1 2 3 4 5 →