Resilient Agriculture Innovation Centre of Excellence, AgResearch Limited, Grasslands Research Centre, Palmerston North, New Zealand.
Departamento de Biología, Universidad de La Serena, Casilla 554, La Serena, Chile.
New Phytol. 2021 Jun;230(6):2105-2113. doi: 10.1111/nph.17335. Epub 2021 Apr 3.
A trade-off between growth and defence functions is commonly observed in plants. We propose that the association of plants with Epichloë fungal endophytes may eliminate this trade-off. This would be a consequence of the double role of these endophytes in host plants: the stimulation of plant growth hormones (e.g. gibberellins) and the fungal production of antiherbivore alkaloids. We put forward a model that integrates this dual effect of endophytes on plant growth and defence and test its predictions by means of meta-analysis of published literature. Our results support the notion that the enhanced plant resistance promoted by endophytes does not compromise plant growth. The limits and ecological benefits of this endophyte-mediated lack of plant growth-defence trade-off are discussed.
在植物中，通常可以观察到生长和防御功能之间的权衡。我们提出，植物与内生真菌 Epichloë 的共生可能消除这种权衡。这将是这些内生真菌在宿主植物中双重作用的结果：刺激植物生长激素（如赤霉素）和真菌产生抗草食动物生物碱。我们提出了一个模型，该模型整合了内生真菌对植物生长和防御的双重影响，并通过对已发表文献的荟萃分析来检验其预测。我们的结果支持这样一种观点，即内生菌促进的植物抗性增强不会损害植物的生长。讨论了这种内生菌介导的植物生长-防御权衡缺失的限制和生态效益。
