ABSTRACT

Volatile organic compounds displayed biological activities on a wide range of organisms, including plants and microbes. Investigating their role in the plant-microbe interaction processes occurring in the soil is challenging. By simulating belowground communication conditions between plant and microbes, in this study, we aimed to investigate the effects of the volatiles emitted by Serratia plymuthica and Fusarium culmorum on the nutrient status of maize plants. Plants were grown in potting soil and exposed to volatiles emitted by microbes inoculated in Petri dishes at the bottom of a jar. Nutrients content of plant tissues as well as soil volatiles were analyzed by ICP-MS and GC-MS, respectively. Our results showed that volatiles emitted belowground by Serratia plymuthica and Fusarium culmorum, in monoculture or interaction, differentially impacted on the content of some nutrient in plants, indicating that microbial volatiles-emitted belowground can affect the nutritional status of plants from a distance.

摘要

挥发性有机化合物对包括植物和微生物在内的多种生物都具有生物活性。研究它们在土壤中发生的植物与微生物相互作用过程中的作用具有挑战性。通过模拟植物与微生物之间的地下通讯条件，本研究旨在研究粘质沙雷氏菌和镰刀菌释放的挥发物对玉米植物养分状况的影响。植物在盆栽土壤中生长，并暴露于广口瓶底部培养皿中接种的微生物释放的挥发物。通过ICP-MS和GC-MS分别分析了植物组织的营养成分和土壤挥发物。我们的结果表明，挥发物通过单培养或交互作用的粘质沙雷氏菌和镰刀菌对植物中某些养分含量的影响不同，表明地下释放的微生物挥发物可从远处影响植物的营养状况。