Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland.
Plant Signal Behav. 2020 Mar 3;15(3):1728468. doi: 10.1080/15592324.2020.1728468. Epub 2020 Feb 14.
Numerous factors can affect the Biogenic Volatile Organic Compounds (BVOC) emitted by plants. One of these factors is the microbial communities living on leaf surfaces (phylloplane). Bacteria and fungi can use compounds produced and emitted by plants for their own metabolism. Thus, microorganism communities can modulate BVOC emissions and affect interactions between plants and other organisms. The aim of this study was to evaluate the role of microbial communities on BVOC emissions of leaves. Therefore, we removed bacteria and/or fungi by using bactericide/fungicide treatments in a factorial design experiment with grown in pots. BVOC emissions were sampled before and after the treatment application. Our results showed that four new compounds (cyclohexanone, cyclohexyl cyanide and two unknown compounds) were emitted after the removal of fungi, whereas no effect was detected in response to the bactericide treatment. This suggests that fungi inhibit or reduce the production of the above mentioned BVOCs from leaves or use those compounds for their own metabolism. The origin and the roles of the novel compounds emitted requires further investigation.
许多因素会影响植物释放的生物源挥发性有机化合物 (BVOC)。其中一个因素是生活在叶片表面（叶平面）的微生物群落。细菌和真菌可以利用植物产生和释放的化合物进行自身代谢。因此，微生物群落可以调节 BVOC 的排放，并影响植物与其他生物之间的相互作用。本研究旨在评估微生物群落对叶片 BVOC 排放的作用。为此，我们采用杀菌剂/抑菌剂处理，在盆栽中进行了一个析因设计实验，以去除细菌和/或真菌。在处理应用前后采样 BVOC 排放。我们的结果表明，在去除真菌后，有四种新化合物（环己酮、环己基氰化物和两种未知化合物）被释放出来，而抑菌剂处理没有检测到影响。这表明真菌抑制或减少了上述 BVOCs 从叶片中的产生，或者利用这些化合物进行自身代谢。新型化合物的来源和作用需要进一步研究。
