Tolerance and overcompensation to infection by Phytophthora infestans in the wild perennial climber Solanum dulcamara

Studies of infection by Phytophthora infestans—the causal agent of potato late blight—in wild species can provide novel insights into plant defense responses, and indicate how wild plants might be influenced by recurrent epidemics in agricultural fields. In the present study, our aim was to investigate if different clones of Solanum dulcamara (a relative of potato) collected in the wild differ in resistance and tolerance to infection by a common European isolate of P. infestans. We performed infection experiments with six S. dulcamara genotypes (clones) both in the laboratory and in the field and measured the degree of infection and plant performance traits. In the laboratory, the six evaluated genotypes varied from resistant to susceptible, as measured by degree of infection 20 days post infection. Two of the four genotypes susceptible to infection showed a quadratic (concave downward) relationship between the degree of infection and shoot length, with maximum shoot length at intermedi...

对野生种中致病疫霉（Phytophthora infestans，马铃薯晚疫病的致病菌）感染机制的研究，不仅能为植物防御反应提供全新见解，还可揭示野生植物如何受农田反复流行病害的影响。本研究旨在探究野生环境中采集的欧白英（Solanum dulcamara，马铃薯的近缘种）不同克隆系，对欧洲常见致病疫霉（P.infestans）分离株的抗性与耐受性是否存在差异。我们以6个欧白英基因型（克隆系）为材料，分别在实验室和田间开展感染实验，并测定其感染程度与植物表型性状。实验室结果显示，以感染20天后的感染程度为指标，6个供试基因型的抗性水平从高抗到易感呈梯度分布。在4个易感基因型中，有2个的感染程度与茎长呈二次（下凹）关系，其茎长最大值出现在中等...