Issue 10, 2022

Cd stress alleviation in mung-bean seedlings with biogenic hydroxyapatite nanoparticles as ecofriendly remediation agents

Abstract

Environmentally friendly remediation agents with good biocompatibility have been a research target in heavy-metal pollution remediation in agriculture, which is of great significance for food safety and human health. Disc-shaped biogenic hydroxyapatite (HAP) nanoparticles (NPs) were synthesized using Aspergillus niger fermentation broth as the culture medium, and the remediation effects on Cd contamination were analyzed. The biogenic molecules gave rise to numerous functional groups in the as-obtained HAP NPs. After adding biogenic HAP NPs to the habitat of mung-bean seedlings under Cd pollution, the root cortex was coated tightly by biogenic HAP NPs, and the Cd content in the stems decreased by 33.96–65.66% and 56.07–79.29%, respectively, at low and high dosages of biogenic HAP NPs. Mung-bean development exhibited recovered elongation and biomass accumulation in roots and stems, together with the restored synthesis of photosynthetic pigments. Furthermore, the application of biogenic HAP NPs led to a remarkable reduction of oxidative stress in seedling stems. The intracellular contents of H2O2 and malondialdehyde (MDA) decreased by 42.67–81% and 49.72–68.31%, respectively, under different treatments. The measurement of antioxidant enzyme activities, including superoxide dismutase (SOD), catalase (CAT) and ascorbic acid oxidase (APX), showed that the activities of these enzymes were 1.10–6.34, 1.10–1.53 and 1.00–11.52 times higher than those under Cd stress alone. These results suggested that biogenic HAP NPs diminished the negative effects of Cd on seedling growth, effectively blocked Cd translocation in mung-bean seedlings, and eliminated the oxidative stress triggered by Cd toxicity, which illustrate the advantages of biogenic nanomaterials as ecofriendly remediation agents for heavy-metal contamination in agriculture.

Graphical abstract: Cd stress alleviation in mung-bean seedlings with biogenic hydroxyapatite nanoparticles as ecofriendly remediation agents

Supplementary files

Article information

Article type
Paper
Submitted
05 юни 2022
Accepted
19 авг 2022
First published
23 авг 2022

Environ. Sci.: Nano, 2022,9, 3844-3858

Cd stress alleviation in mung-bean seedlings with biogenic hydroxyapatite nanoparticles as ecofriendly remediation agents

Y. Shen, J. Li, S. Zhang, X. Jiang, J. Liang, T. Li, R. Guo, W. Guan and L. Yang, Environ. Sci.: Nano, 2022, 9, 3844 DOI: 10.1039/D2EN00536K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements