Feng Chao, Tian Xingling, Wang Xiaoqiang, Cui Mengmeng, Xu Chuantao, Wang Weimin, Wang Wei
Key Laboratory of Tobacco Pest Monitoring & Integrated Management, Tobacco Research Institute, Chinese Academy of Agricultural Sciences Qingdao 266101 China
Conservation and Restoration Institute, Chinese Academy of Cultural Heritage Beijing 100029 China.
RSC Adv. 2020 Aug 4;10(48):28576-28584. doi: 10.1039/d0ra01161d. eCollection 2020 Aug 3.
We synthesised a silicon dioxide nanosphere with a novel nanostructure by loading salicylic acid (SA) as a plant disease resistance inductor to prolong plant life. The SA nanosphere was evaluated by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, N adsorption method, enzyme activity test and pot experiments. The results demonstrated that the SA nanosphere induced the activities of polyphenol oxidase, phenylalanine ammonia-lyase, peroxidase, and chitinase to enhance plant immunity to inhibit . Its SA loading capacity reached approximately 80%. The SA nanospheres exhibited a sustained release and maintained its resistance effect at 84.79% after 15 days. Thus, the SA nanospheres could gradually release SA to enhance inhibitive enzyme activity in diseased plants. Furthermore, finite element method was used to establish different nanosphere models and analyse the SA releasing process. SA concentration sharply increased near the nanospheres, and SA was slowly released to the solution. This SA nanosphere will have a great potential in future environmental-friendly practical application.
我们通过负载水杨酸（SA）作为植物抗病诱导剂来合成具有新型纳米结构的二氧化硅纳米球，以延长植物寿命。通过扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱、N吸附法、酶活性测试和盆栽实验对SA纳米球进行了评估。结果表明，SA纳米球诱导了多酚氧化酶、苯丙氨酸解氨酶、过氧化物酶和几丁质酶的活性，以增强植物免疫力来抑制……。其SA负载量达到约80%。SA纳米球表现出持续释放，15天后仍保持84.79%的抗性效果。因此，SA纳米球可以逐渐释放SA以增强患病植物中的抑制酶活性。此外，使用有限元方法建立了不同的纳米球模型并分析了SA释放过程。SA浓度在纳米球附近急剧增加，SA缓慢释放到溶液中。这种SA纳米球在未来的环保实际应用中将具有巨大潜力。
