Gfeller Aurélie, Fuchsmann Pascal, De Vrieze Mout, Gindro Katia, Weisskopf Laure
Changins School of Viticulture and Oenology, 1260 Nyon, Switzerland.
Agroscope, Plant Protection, 1260 Nyon, Switzerland.
Microorganisms. 2022 Jul 26;10(8):1510. doi: 10.3390/microorganisms10081510.
Bacterial volatiles play important roles in mediating beneficial interactions between plants and their associated microbiota. Despite their relevance, bacterial volatiles are mostly studied under laboratory conditions, although these strongly differ from the natural environment bacteria encounter when colonizing plant roots or shoots. In this work, we ask the question whether plant-associated bacteria also emit bioactive volatiles when growing on plant leaves rather than on artificial media. Using four potato-associated , we demonstrate that potato leaves offer sufficient nutrients for the four strains to grow and emit volatiles, among which 1-undecene and Sulfur compounds have previously demonstrated the ability to inhibit the development of the oomycete , the causative agent of potato late blight. Our results bring the proof of concept that bacterial volatiles with known plant health-promoting properties can be emitted on the surface of leaves and warrant further studies to test the bacterial emission of bioactive volatiles in greenhouse and field-grown plants.
细菌挥发物在介导植物与其相关微生物群之间的有益相互作用中发挥着重要作用。尽管它们具有相关性，但细菌挥发物大多是在实验室条件下进行研究的，尽管这些条件与细菌在定殖植物根或茎时所遇到的自然环境有很大不同。在这项工作中，我们提出一个问题：与植物相关的细菌在植物叶片上生长而不是在人工培养基上生长时，是否也会释放具有生物活性的挥发物。使用四种与马铃薯相关的菌株，我们证明马铃薯叶片为这四种菌株的生长和挥发物释放提供了足够的养分，其中1-十一碳烯和硫化合物先前已证明具有抑制卵菌（马铃薯晚疫病的病原体）发育的能力。我们的结果提供了概念证明，即具有已知促进植物健康特性的细菌挥发物可以在叶片表面释放，并且有必要进一步研究以测试温室和田间种植植物中生物活性挥发物的细菌释放情况。
