Département de phytologie, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, Québec, QC, G1V 0A6, Canada.
Centre de recherche et d'innovation sur les végétaux, Université Laval, Québec, QC, G1V 0A6, Canada.
Sci Rep. 2024 Oct 21;14(1):24726. doi: 10.1038/s41598-024-74576-1.
The widespread use of conventional pesticides for plant pathogen control poses significant risks to human health and the environment, and it is therefore crucial to develop environmentally friendly, human-safe alternatives to these products that offer a sustainable approach for crop protection. Here, we examined the potential of ethanolic extracts from four forest tree species for their antibacterial activity against the bacterial pathogen Pseudomonas syringae pv. tomato (Pst) and their ability to trigger effective defense responses in the model plant Arabidopsis thaliana. The extracts exhibited direct toxic effects against Pst and triggered the expression of defense-related genes naturally induced by oxidative stress cues or the defense elicitor salicylic acid in leaf tissue. The direct antibacterial effects of the tree extracts, together with their defense gene-inducing effects in planta, resulted in a strong host plant-protecting effect against Pst. These findings suggest the eventual effectiveness of forest tree extracts as plant protectants against the bacterial pathogen Pst. They also suggest the potential of these extracts as a sustainable, eco-friendly alternative to conventional pesticides for the management of economically important plant pathogens.
传统农药在植物病原菌防治方面的广泛应用对人类健康和环境构成了重大风险，因此，开发对这些产品具有环保、对人类安全的替代品至关重要，这些替代品为作物保护提供了可持续的方法。在这里，我们研究了四种森林树种的乙醇提取物在对抗细菌性病原菌丁香假单胞菌 pv.番茄（Pst）方面的潜在抗菌活性，以及它们在模式植物拟南芥中引发有效防御反应的能力。提取物对 Pst 表现出直接的毒性作用，并触发了叶片组织中由氧化应激信号或防御激发子水杨酸自然诱导的防御相关基因的表达。树木提取物的直接抗菌作用，以及它们在植物体内诱导防御基因的作用，导致对 Pst 的强烈宿主植物保护作用。这些发现表明，森林树木提取物最终可能作为植物保护剂对抗细菌性病原菌 Pst。它们还表明，这些提取物有可能作为一种可持续的、环保的替代传统农药来管理经济上重要的植物病原菌。
