Department of Plant Protection, College of Agriculture and Natural Resources, Razi University, Kermanshah, Iran.
Molecular Phytobacteriology Laboratory, Infectious Disease Research Center, KRIBB, Daejeon 34141, South Korea.
J Exp Bot. 2022 Jan 13;73(2):463-486. doi: 10.1093/jxb/erab465.
Volatile compounds play important roles in rhizosphere biological communications and interactions. The emission of plant and microbial volatiles is a dynamic phenomenon that is affected by several endogenous and exogenous signals. Diffusion of volatiles can be limited by their adsorption, degradation, and dissolution under specific environmental conditions. Therefore, rhizosphere volatiles need to be investigated on a micro and spatiotemporal scale. Plant and microbial volatiles can expand and specialize the rhizobacterial niche not only by improving the root system architecture such that it serves as a nutrient-rich shelter, but also by inhibiting or promoting the growth, chemotaxis, survival, and robustness of neighboring organisms. Root volatiles play an important role in engineering the belowground microbiome by shaping the microbial community structure and recruiting beneficial microbes. Microbial volatiles are appropriate candidates for improving plant growth and health during environmental challenges and climate change. However, some technical and experimental challenges limit the non-destructive monitoring of volatile emissions in the rhizosphere in real-time. In this review, we attempt to clarify the volatile-mediated intra- and inter-kingdom communications in the rhizosphere, and propose improvements in experimental design for future research.
挥发性化合物在根际生物通讯和相互作用中发挥着重要作用。植物和微生物挥发物的排放是一种动态现象，受几种内源性和外源性信号的影响。在特定的环境条件下，挥发性物质的扩散会受到其吸附、降解和溶解的限制。因此，需要在微观和时空尺度上研究根际挥发物。植物和微生物挥发物不仅可以通过改善根系结构（使其成为富含营养的庇护所）来扩大和专门化根际细菌生境，还可以通过抑制或促进邻近生物的生长、趋化性、存活和健壮性。根际挥发物通过塑造微生物群落结构和招募有益微生物，在根际微生物组工程中发挥着重要作用。微生物挥发物是在环境挑战和气候变化期间改善植物生长和健康的合适候选物。然而，一些技术和实验挑战限制了对根际中挥发性排放的实时、非破坏性监测。在这篇综述中，我们试图阐明根际中种内和种间挥发性介导的通讯，并提出了改进实验设计的建议，以用于未来的研究。
