Nanomaterial inactivates environmental virus and enhances plant immunity for controlling tobacco mosaic virus disease

Qinhong Jiang, Yonghui Xie, Bingcheng Zhou, Zhijiang Wang, Dekai Ning, Hongming Li, Junzheng Zhang, Meizhen Yin, Jie Shen () and Shuo Yan ()
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Qinhong Jiang: China Agricultural University
Yonghui Xie: Kunming Branch of Yunnan Provincial Tobacco Company
Bingcheng Zhou: Beijing University of Chemical Technology
Zhijiang Wang: Kunming Branch of Yunnan Provincial Tobacco Company
Dekai Ning: Kunming Branch of Yunnan Provincial Tobacco Company
Hongming Li: Kunming Branch of Yunnan Provincial Tobacco Company
Junzheng Zhang: China Agricultural University
Meizhen Yin: Beijing University of Chemical Technology
Jie Shen: China Agricultural University
Shuo Yan: China Agricultural University

Nature Communications, 2024, vol. 15, issue 1, 1-17

Abstract: Abstract Tobacco mosaic virus (TMV) is extremely pathogenic and resistant to stress There are great needs to develop methods to reduce the virus in the environment and induce plant immunity simultaneously. Here, we report a multifunctional nano-protectant to reduce the virus in the environment and induce plant immunity simultaneously. The star polycation (SPc) nanocarrier can act as an active ingredient to interact with virus coat protein via electrostatic interaction, which reduces the proportion of TMV particles to 2.9% and leads to a reduction of the amount of virus in the environment by half. SPc can act as an adjuvant to spontaneously assemble with an immune inducer lentinan (LNT) through hydrogen bonding into nanoscale (142 nm diameter) LNT/SPc complex, which improves the physicochemical property of LNT for better wetting performance on leaves and cellular uptake, and further activates plant immune responses. Finally, the LNT/SPc complex displays preventive and curative effects on TMV disease, reducing TMV-GFP relative expression by 26% in the laboratory and achieving 82% control efficacy in the field We hope the strategy reported here would be useful for control of crop virus disease.

Date: 2024
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DOI: 10.1038/s41467-024-52851-z

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