Vortex-induced dispersal of a plant pathogen by raindrop impact

Proceedings of the National Academy of Sciences of the United States of America
Seungho KimSunghwan Jung

Abstract

Raindrop impact on infected plants can disperse micron-sized propagules of plant pathogens (e.g., spores of fungi). Little is known about the mechanism of how plant pathogens are liberated and transported due to raindrop impact. We used high-speed photography to observe thousands of dry-dispersed spores of the rust fungus Puccinia triticina being liberated from infected wheat plants following the impact of a single raindrop. We revealed that an air vortex ring was formed during the raindrop impact and carried the dry-dispersed spores away from the surface of the host plant. The maximum height and travel distance of the airborne spores increased with the aid of the air vortex. This unique mechanism of vortex-induced dispersal dynamics was characterized to predict trajectories of spores. Finally, we found that the spores transported by the air vortex can reach beyond the laminar boundary layer of leaves, which would enable the long-distance transport of plant pathogens through the atmosphere.

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Citations

Jun 20, 2019·Journal of the Royal Society, Interface·Saurabh NathJonathan B Boreyko
Feb 27, 2020·Proceedings of the National Academy of Sciences of the United States of America·Daniele Lagomarsino OnetoAgnese Seminara
May 20, 2020·Physical Review. E·Jeonghoon HanChoongyeop Lee
Jul 18, 2020·Journal of the Royal Society, Interface·Hyunggon ParkSunghwan Jung
Jun 10, 2020·Proceedings of the National Academy of Sciences of the United States of America·Seungho KimSunghwan Jung
Jan 8, 2020·Bioinspiration & Biomimetics·Yashraj BhosaleSunghwan Jung
Sep 20, 2020·Scientific Reports·Kazuyuki KitaYuichi Onda
Aug 11, 2021·ACS Applied Materials & Interfaces·Lifei HeFeng Liu
Aug 11, 2021·Proceedings. Biological Sciences·Lukas P Bell-Dereske, Sarah E Evans
Aug 22, 2021·Proceedings of the National Academy of Sciences of the United States of America·Ranit MukherjeeJonathan B Boreyko
Nov 23, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Niladri Sekhar SatpathiAshis Kumar Sen
Nov 3, 2021·Journal of Experimental Botany·Anne-Kristin LenzGraeme D Ruxton

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