A time-lapse of Arabidopsis root interaction with Bacillus subtilis. An Arabidopsis root was inoculated with a B. subtilis strain expressing the mKate protein (red). Note the bacterial attraction to the root elongation zone followed by root colonization and biofilm formation. Video courtesy of Hassan Massalha. “Live imaging of root–bacteria interactions in a microfluidics setup,” by Hassan Massalha, et al. Article link: http://www.pnas.org/content/early/2017/03/21/1618584114 | PNAS

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