Multimechanism Collaborative Superior Antioxidant CDzymes To Alleviate Salt Stress-Induced Oxidative Damage in Plant Growth

Jiawen Gong, Quan Liu, Linlin Cai, Qi Yang, Yuping Tong, Xi Chen, Sumasri Kotha, Xiaobo Mao, Weiwei He

Research output: Contribution to journalArticlepeer-review

Abstract

Salt stress has become one major environmental challenge threatening global crop yield. Targeting salt-induced oxidative stress, nanozymes with high-efficiency antioxidant activity and good biocompatibility represent an effective way to improve plant salt tolerance. In this study, carbon dot nanozymes (CDzymes) derived from glucose and histidine are designed to alleviate salt-induced oxidative stress in plant growth. The CDzymes are comprehensively characterized to exhibit broad-spectrum antioxidant capability, allowing them to efficiently scavenge reactive oxygen species (·OH, O2-·, H2O2), reactive nitrogen species (·NO and ONOO-), and stable free radicals (DPPH·, ABTS·+, PTIO·). Due to their unique structure, CDzymes exhibit multiple antioxidant mechanisms involving electron transfer, H atom transfer, and enzyme-like catalytic behavior. CDzymes have good biocompatibility and can help promote the growth of Pisum sativum Linn and Eucommia under salinity. CDzyme treatment can significantly (p < 0.001) relieve salt stress-induced oxidative damage of biological components (including chlorophyll, proline, carbohydrate, and protein) and redox enzyme activity, which underlies the mechanism of salt-induced plant wilt. This study demonstrates that CDzymes can act as a potential antioxidant to modulate the level of oxidative stress in biological systems, opening up new avenues for agricultural salt stress management in crops.

Original languageEnglish (US)
Pages (from-to)4237-4247
Number of pages11
JournalACS Sustainable Chemistry and Engineering
Volume11
Issue number10
DOIs
StatePublished - Mar 13 2023

Keywords

  • antioxidant
  • carbon dots
  • nanozyme
  • oxidative damage
  • salt stress

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Renewable Energy, Sustainability and the Environment

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