Nitrogen-doped carbon dots alleviate the damage from tomato bacterial wilt syndrome: systemic acquired resistance activation and reactive oxygen species scavenging
| Autor: | Le Yue, Fengchang Wu, Baoshan Xing, Chuanxi Wang, Xiaofei Chen, Xiaoli Zhao, Xiehui Le, Zhenyu Wang, Xuesong Cao, Hanyue Yang, Xing Luo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Reactive oxygen species biology Materials Science (miscellaneous) Bacterial wilt Jasmonic acid fungi food and beverages biology.organism_classification medicine.disease_cause Plant disease chemistry.chemical_compound chemistry medicine Food science Fatty acid synthesis Salicylic acid Systemic acquired resistance Oxidative stress General Environmental Science |
| Zdroj: | Environmental Science: Nano. 8:3806-3819 |
| ISSN: | 2051-8161 2051-8153 |
| DOI: | 10.1039/d1en00715g |
| Popis: | Plant disease seriously threatens the global food security. However, an effective and sustainable control strategy is lacking. In this study, foliar application with 10 mg/L nitrogen doped carbon dots (N-CDs) suppressed bacterial wilt in tomatoes, statistically decreased disease severity by 71.19%, and increased the fresh biomass of tomato shoot by 55.86%. The disease control efficacy with N-CDs was 1.56-fold greater than the pure CDs (P-CDs). Mechanistically, 1) nitrogen doping enhanced reactive oxygen species (ROS) scavenging ability of P-CDs, and then exhibited higher oxidative stress alleviation in tomatoes; 2) N-CDs activated the salicylic acid and jasmonic acid dependent systemic acquired resistance (SAR) in tomatoes, with subsequent inhibition in vivo pathogens growth; 3) N-CDs activated the antioxidative enzyme activity in tomatoes, and then reduced the pathogen induced oxidative stress. Polyacrylic acid modification eliminated the disease control ability of N-CDs because the modification decreased the direct physiochemical process (e.g., ROS scavenging) and indirect resistance activation (e.g., SAR activation) of N-CDs in tomatoes. Metabolomics analysis suggested that N-CDs also significantly promoted the tricarboxylic acid cycle and fatty acid synthesis in tomatoes. The findings demonstrate the important role of N-CDs in promoting disease suppression for sustainable agriculture. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|