The effectiveness and costs of pathogen resistance strategies in a perennial plant

Plants have evolved different strategies to resist pathogens, but little is known about how effective, stable and costly these mechanisms are in perennial plants across multiple growing seasons.
We conducted a laboratory experiment to assess resistance variation in Plantago lanceolata against the powdery mildew-causing fungus Podosphaera plantaginis and to measure possible trade-offs between the different resistance strategies. To test stability and costs of resistance, we established common garden populations of plants possessing three different resistance strategies: qualitative resistance that is the ability to block pathogen infection, quantitative resistance that is the ability to mitigate pathogen development and susceptibility. We measured their performance with and without disease for 3 years.
There were no trade-offs between qualitative and quantitative resistance, and the components of quantitative resistance were positively correlated.
Throughout the 3-year common garden s...

植物已演化出多种抵御病原体的策略，但多年生植物在多个生长季中这些机制的有效性、稳定性及代价如何，目前仍知之甚少。

我们开展了一项实验室实验，旨在评估长叶车前草（Plantago lanceolata）对致白粉病真菌车前草白粉菌（Podosphaera plantaginis）的抗性变异，并测定不同抗性策略间可能存在的权衡关系。为检验抗性的稳定性与代价，我们在公共园圃（common garden）中建立了具有三种不同抗性策略的植物种群：定性抗性（qualitative resistance，即阻断病原体侵染的能力）、定量抗性（quantitative resistance，即减缓病原体发育的能力）以及易感性。我们连续3年测定了这些植物在有病害和无病害条件下的表现。

定性抗性与定量抗性之间不存在权衡关系，且定量抗性的各组分呈正相关。在为期3年的公共园圃实验中...