Centro de Biotecnología Vegetal, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago 8370146, Chile.
Millennium Science Initiative Program (ANID), Millennium Nucleus for the Development of Super Adaptable Plants (MN-SAP), Santiago 8370186, Chile.
Int J Mol Sci. 2022 Aug 28;23(17):9753. doi: 10.3390/ijms23179753.
The remarkable capacity of the generalist aphid to resist most classes of pesticides, along with the environmental and human health risks associated with these agrochemicals, has necessitated the development of safer and greener solutions to control this agricultural pest. Oligogalacturonides (OGs) are pectin-derived molecules that can be isolated from fruit industry waste. OGs have been shown to efficiently stimulate plant defenses against pathogens such as and . However, whether OGs confer resistance against phytophagous insects such as aphids remains unknown. Here, we treated plants with OGs and recorded their effects on the feeding performance and population of aphids. We also identified the defense mechanism triggered by OGs in plants through the analysis of gene expression and histological approaches. We found that OG treatments increased their resistance to infestation by reducing the offspring number and feeding performance. Furthermore, this enhanced resistance was related to a substantial accumulation of callose and reactive oxygen species and activation of the salicylic acid signaling pathway.
普通蚜虫具有抵抗大多数类别的杀虫剂的显著能力，加上这些农用化学品与环境和人类健康风险相关，这就需要开发更安全、更环保的解决方案来控制这种农业害虫。寡糖醛酸（OGs）是可从水果工业废物中分离出来的果胶衍生分子。研究表明，OGs 可以有效地刺激植物对病原体（如 和 ）的防御。然而，OGs 是否赋予植物对草食性昆虫（如蚜虫）的抗性尚不清楚。在这里，我们用 OGs 处理 植物，并记录它们对 蚜虫取食行为和种群的影响。我们还通过基因表达和组织学分析的方法来鉴定 OGs 在植物中触发的防御机制。我们发现，通过减少后代数量和取食行为，OG 处理增加了植物对 侵染的抗性。此外，这种增强的抗性与大量的几丁质和活性氧物质的积累以及水杨酸信号通路的激活有关。
