The AmidP drives the GUS expression in the vascular vein of leaves resembling a pattern of the sink-to-source transition.

Abstract

<p>A. GUS expression is detected in cotyledons and the distal tip of young leaves of 10-d seedlings. B. The AmidP drives expression in the germinating seed joint of above- and under-ground part. C–D. GUS activity is detected in sepals of flowers (C), as shown in an amplified flower indicated with a red arrow (D). E–J. X-Gluc staining is detected throughout the vascular veins of a cotyledon (E), expanded source leaves (F, G, and H) and progresses basipetally down transition leaves (I and J).</p