使用茉莉酸甲酯和介孔二氧化硅纳米颗粒复合物诱导杨树的抗食草动物防御反应。

IF 3.8 1区农林科学 Q1 AGRONOMY Pest Management Science Pub Date : 2024-08-08 DOI:10.1002/ps.8360

Jiaxing Fang, Wei Gan, Zheng Wang, Rong Zhang, Sufang Zhang, Fu Liu, Xiyang Zhao, Xiangbo Kong

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引用次数: 0

摘要

背景：中国的杨树长期受到秋网蝽（Hyphantria cunea）的危害。利用化学激发剂增强植物免疫力是一种环保的害虫控制方法。植物激素茉莉酸甲酯（MeJA）可以激发杨树的化学防御能力，对抗食草动物，但在实践中效果有限。在此，我们研究了 MeJA 和介孔二氧化硅纳米粒子（MSN）复合物（MeJA@MSN）在诱导杨树对 H. cunea 的抗性方面的效果，这可能会为 MeJA 的有效利用提供策略：结果：硅基植物激素复合物（MeJA@MSNs）具有优异的生物和理化特性，如良好的生物相容性和植物组织运输性。通过代谢分析研究了 MeJA、MSNs 和 MeJA@MSNs 诱导的杨树叶片代谢物的变化。MeJA@MSNs可产生极强的诱导抗性，同时水杨醛含量升高，且随施用剂量的增加而增加。当剂量为 1 μg 时，水杨醛代谢物对 H. cunea 幼虫有很强的抗药性，50% 的致死剂量为 20.4 μg/mg。此外，转录分析表明，MeJA@MSNs 比 MeJA 和 MSNs 更能上调生物合成途径中的关键基因：我们的研究结果表明，MeJA 和 MSNs 在杨树中发生正向作用，导致水杨醛积累，增强了对 H. cunea 的诱导抗性，为了解 MeJA@MSNs 诱导抗性的内在机制提供了新的视角。© 2024 化学工业协会。

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Induction of antiherbivore defense responses in poplars using a methyl jasmonate and mesoporous silica nanoparticle complex.

Background: Poplar in China has long been plagued by the fall webworm Hyphantria cunea. Enhancing plant immunity using chemical elicitors is an environmentally friendly approach to pest control. The phytohormone methyl jasmonate (MeJA) can stimulate the chemical defenses of poplars against herbivores but has been shown to have limited efficacy in practice. Here, we studied the effects of a MeJA and mesoporous silica nanoparticle (MSN) complex (MeJA@MSN) regarding the induction of poplar resistance to H. cunea, which may provide strategies for the effective use of MeJA.

Results: The silicon-based phytohormone complex (MeJA@MSNs) exhibited excellent biological and physiochemical properties, such as excellent biocompatibility and plant tissue transportability. The changes in metabolites in poplar leaves induced by MeJA, MSNs, and MeJA@MSNs were investigated by metabolic analysis. MeJA@MSNs led to highly potent induced resistance along with elevated salicylaldehyde content, which increased with the dose administered. The salicylaldehyde metabolite showed a strong antifeedant effect on H. cunea larvae at a dosage of 1 μg, with the 50% lethal dose being 20.4 μg/mg. Furthermore, transcriptional analysis showed that MeJA@MSNs upregulated key genes in biosynthetic pathways more than MeJA and MSNs.

Conclusion: Our results show that MeJA and MSNs interact positively in poplar, leading to salicylaldehyde accumulation and increased induced resistance to H. cunea, providing new insights into the underlying resistance mechanisms induced by MeJA@MSNs. © 2024 Society of Chemical Industry.

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来源期刊

Pest Management Science 农林科学-昆虫学

CiteScore

7.90

自引率

9.80%

发文量

553

审稿时长

4.8 months

期刊介绍： Pest Management Science is the international journal of research and development in crop protection and pest control. Since its launch in 1970, the journal has become the premier forum for papers on the discovery, application, and impact on the environment of products and strategies designed for pest management. Published for SCI by John Wiley & Sons Ltd.