Fig. 4
From: A detailed expression map of the PIN1 auxin transporter in Arabidopsis thaliana root
PIN1 expression at the root-shoot junction in 3 dag seedlings. a and b PIN1 signal (in green) was detected in the vascular elements attached to the mature xylem vessels throughout the whole hypocotyl. PIN1 was polarized rootward (white arrows). c The rootward PIN1 signal in the cells flanking the mature xylem vessels of the hypocotyl. d Magnified view of the white rectangular region from (b). Bars = 50 μm