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(Color online) (a) Mask layout of the microfluidic device showing the parallel microchannels with ports for housing seedlings and inoculation of pathogens, (b) snapshot of multiple Arabidopsis roots growing in the microchannels filled with DI water. The image is taken after 60 h of planting the seedlings in the input ports.
(Color online) Root growth parameters measured during hydroponic growth of the Arabidopsis plants in the microfluidic device with different concentrations of growth media. (a) Snapshots of the root tip (at the end of the growth period) grown in DI water, 10% MS, and 25% MS media, (b) root length versus growth time, (c) root diameter, and (d) cell length along the root (for the first 4 mm from root tip) at the end of 198 h.
(Color online) Illustration of interactions between the Arabidopsis roots grown in microfluidic device with two plant pathogens. (a) Sugarbeet nematodes, inoculated 2 h before, are probing the root surface (enhanced online). Later, some of them find their way to the root center and use their stylus to draw nutrients from the root (enhanced online). (b)P. sojae zoospores, inoculated 24 h before, cluster around the root tip and grow hyphae towards the root. [URL: http://dx.doi.org/10.1063/1.3604788.1] [URL: http://dx.doi.org/10.1063/1.3604788.2]10.1063/1.3604788.110.1063/1.3604788.2
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