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Immunomodulating melatonin-decorated silica nanoparticles suppress bacterial wilt (Ralstonia solanacearum) in tomato (Solanum lycopersicum L.) through fine-tuning of oxidative signaling and rhizosphere bacterial community

文献类型： 外文期刊

作者： Ijaz, Munazza 1 ; Lv, Luqiong 1 ; Ahmed, Temoor 1 ; Noman, Muhammad 4 ; Manan, Abdul 6 ; Ijaz, Rafia 7 ; Hafeez, Rahila 1 ; Shahid, Muhammad Shafiq 8 ; Wang, Daoze 9 ; Ondrasek, Gabrijel 10 ; Li, Bin 1 ;

作者机构： 1.Zhejiang Univ, State Key Lab Rice Biol & Breeding, Key Lab Mol Biol Crop Pathogens & Insects, Minist Agr,Zhejiang Key Lab Biol & Ecol Regulat Cr, Hangzhou 310058, Peoples R China

2.Xianghu Lab, Hangzhou 311231, Peoples R China

3.Western Caspian Univ, Dept Polit Sci, Baku, Azerbaijan

4.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, Hangzhou 310021, Peoples R China

5.Gulf Univ Sci & Technol, Coll Arts & Sci, Hawally, Kuwait

6.Zhejiang Univ, Coll Agr & Biotechnol, Inst Crop Sci, Hangzhou 310058, Peoples R China

7.Govt Coll Univ, Dept Bioinformat & Biotechnol, Faisalabad, Pakistan

8.Sultan Qaboos Univ, Coll Agr & Marine Sci, Dept Plant Sci, Al Khoud 123, Muscat, Oman

9.Hangzhou Rural Revitalizat Serv Ctr, Hangzhou 310020, Peoples R China

10.Univ Zagreb, Fac Agr, Svetosimunska Cesta 25, Zagreb 10000, Croatia

关键词： Biogenic nanoformulations; Microbiome; Plant defense; Systemic acquired resistance; Stress signaling

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： Background Tomato (Solanum lycopersicum L.) production is severely threatened by bacterial wilt, caused by the phytopathogenic bacterium Ralstonia solanacearum. Recently, nano-enabled strategies have shown tremendous potential in crop disease management. Objectives This study investigates the efficacy of biogenic nanoformulations (BNFs), comprising biogenic silica nanoparticles (SiNPs) and melatonin (MT), in controlling bacterial wilt in tomato. Methods SiNPs were synthesized using Zizania latifolia leaves extract. Further, MT containing BNFs were synthesized through the one-pot approach. Nanomaterials were characterized using standard characterization techniques. Greenhouse disease assays were conducted to assess the impact of SiNPs and BNFs on tomato plant immunity and resistance to bacterial wilt. Results The SiNPs and BNFs exhibited a spherical morphology, with particle sizes ranging from 13.02 nm to 22.33 nm for the SiNPs and 17.63 nm to 21.79 nm for the BNFs, indicating a relatively uniform size distribution and consistent shape across both materials. Greenhouse experiments revealed that soil application of BNFs outperformed SiNPs, significantly enhancing plant immunity and reducing bacterial wilt incidence by 78.29% in tomato plants by maintaining oxidative stress homeostasis via increasing the activities of antioxidant enzymes such as superoxide dismutase (31.81%), peroxidase (32.9%), catalase (32.65%), and ascorbate peroxidase (47.37%) compared to untreated infected plants. Additionally, BNFs induced disease resistance by enhancing the production of salicylic acid and activating defense-related genes (e.g., SlPAL1, SlICS1, SlNPR1, SlEDS, SlPD4, and SlSARD1) involved in phytohormones signaling in infected tomato plants. High-throughput 16 S rRNA sequencing revealed that BNFs promoted growth of beneficial rhizosphere bacteria (Gemmatimonadaceae, Ramlibacter, Microscillaceae, Anaerolineaceae, Chloroplast and Phormidium) in both healthy and diseased plants, while suppressing R. solanacearum abundance in infected plants. Conclusion Overall, these findings suggest that BNFs offer a more promising and sustainable approach for managing bacterial wilt disease in tomato plants. [GRAPHICS] .

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