16 research outputs found
Design and Implementation of an Aerobiological Sampling System for Real-Time Characterization with a Surface Plasmon Resonance Equipped UAV
No full text
PNAS
No full textRaindrop 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.National Science FoundationNSF: CBET-1604424US Department of AgricultureUSDA: 2018-67013-28063Published versio
Supporting Video 3 from Phase-change-mediated transport and agglomeration of fungal spores on wheat awns
No full textTop-view high-speed video of evaporation-induced secondary agglomeration process on the wheat awns
Supplementary Information from ‘Sneezing’ plants: pathogen transport via jumping-droplet condensation
No full textWe show that condensation growing on wheat leaves infected with P. triticina is capable of spontaneously launching urediniospores off the plant. This surprising liberation mechanism is enabled by the superhydrophobicity of wheat leaves, which promotes a jumping-droplet mode of condensation powered by the surface energy released from coalescence events. We found that urediniospores often adhere to the self-propelled condensate, resulting in liberation rates approximately 10 cm−2 h−1 for leaves infected with rust. Urediniospores were catapulted up to 5 mm from the leaf’s surface, a distance sufficient to clear the laminar boundary layer for subsequent dispersal even in gentle winds
Supporting Video 1 from Phase-change-mediated transport and agglomeration of fungal spores on wheat awns
No full textSide-view high-speed video of condensing droplets forming on the conical awn hair tips and the surface and moving toward the wider base of the hairs
High-efficiency transformation of the diploid strawberry (Fragaria vesca) for functional genomics
No full textSupplemental Information from Phase-change-mediated transport and agglomeration of fungal spores on wheat awns
No full textIdentification of fungus, four supporting figures, one supporting table, and three supporting video captions
