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Δbrk1 plants growing in microfluidic chambers. A, Comparison of ∆brk1 plants grown for 2 weeks on agar or in microfluidic chambers. Scale bar, 50 µm. B, left column, ∆brk1 chloronemata growing in microfluidic chamber; right column, Δbrk1 filament undergoing comparatively rapid growth. Black arrows indicate initial position of the apical cells throughout the series. Scale bar, 10 µm. See Supplemental Movie S11. C, Quantification of growth rates. Error bars are se.
