文献类型： 外文期刊

作者： Farooq, Tahir ¹ ; Hussain, Muhammad Dilshad ³ ; Wang, Yuan ¹ ; Kamran, Ali ³ ; Umar, Muhammad ⁴ ; Tang, Yafei ¹ ; He, Zifu ¹ ; She, Xiaoman ¹ ;

作者机构： 1.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangzhou 510640, Peoples R China

2.Guangdong Acad Agr Sci, Guangdong Prov Key Lab High Technol Plant Protect, Guangzhou 510640, Peoples R China

3.Guizhou Univ, Coll Agr, Key Lab Agr Microbiol, Guiyang 550025, Peoples R China

4.Univ Tasmania, Tasmanian Inst Agr, New Town Res Labs, 13 St Johns Ave, Hobart, Tas 7008, Australia

关键词： CQDs; Begomovirus; CLCuMuV; Photosynthesis; RNA-seq; Plant immunity; Alternative splicing

期刊名称：JOURNAL OF NANOBIOTECHNOLOGY （ 影响因子：12.6； 五年影响因子：12.3 ）

ISSN：

年卷期： 2024 年 22 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundOwing to their unique physiochemical properties, low toxicity, antipathogenic effects and tunability, fluorescent carbon quantum dots (CQDs) represent a new generation of carbon-based nanomaterials. Despite the mounting research on the efficacy of CQDs against resilient plant pathogens, their potential ability to mitigate viral pathogens and the underlying molecular mechanism(s) remain understudied. In this study, we optimized the CQDs to maximize their antiviral effects against a highly pathogenic Begomovirus (cotton leaf curl Multan virus, CLCuMuV) and elucidated the mechanistic pathways associated with CQDs-mediated viral inhibition. To fine-tune the CQDs-induced antiviral effects against CLCuMuV and investigate the underlying molecular mechanisms,we used HR-TEM, XRD, FT-IR, XPS, and UV-Vis spectrophotometry to characterize the CQDs. SPAD and FluorCam were used for physiological and photosynthetic performance analysis. Transcriptome, RT-qPCR, integrated bioinformatics and molecular biology were employed to investigate gene expression, viral quantification and data validation.ResultsThe application of fluorescent, hexagonal crystalline, UV-absorptive and water-soluble CQDs (0.01 mg/ml) significantly reduced the CLCuMuV titer and mitigated viral symptoms in N. benthamiana at the early (5 dpi) and late (20 dpi) stages of infection. CQDs significantly increased the morphophysiological properties, relative chlorophyll contents and photosynthetic (Fv/Fm, QY_max, NPQ and Rfd) performance of the CLCuMuV-infected plants. While CLCuMuV infection disrupted plant immunity, the CQDs improved the antiviral defense response by regulating important immunity-related genes involved in endocytosis/necroptosis, Tam3-transposase, the ABC transporter/sphingolipid signaling pathway and serine/threonine protein kinase activities. CQDs potentially triggered TSS and TTS alternative splicing events in CLCuMuV-infected plants.ConclusionsOverall, these findings underscore the antiviral potential of CQDs, their impact on plant resilience, and their ability to modulate gene expression in response to viral stress. This study's molecular insights provide a foundation for further research on nanomaterial applications in plant virology and crop protection, emphasizing the promising role of CQDs in enhancing plant health and combating viral infections.