BLH6 and KNAT7 Promoters Direct GUS Expression in the Interfascicular Fibers and Xylem.
(A) Stem cross section of a representative ProBLH6:GUS line showing GUS expression in interfascicular fibers and vascular bundles.
(B) Stem cross section of a representative ProKNAT7:KNAT7-GUS line showing GUS expression in interfascicular fibers and vascular bundles.
(C) Higher magnification image of the representative ProBLH6:GUS line showing the expression pattern in the cambial region and metaxylem of vascular bundles.
(D) Higher magnification image of the representative ProKNAT7:KNAT7-GUS line showing the expression pattern in the cambial region and metaxylem of vascular bundles.
Hand cross sections were taken from the bottom 5 cm of inflorescence stems of 6-week-old plants. C, cambial region; IF, interfascicular fibers; MX, metaxylem; P, phloem; X, xylem. Bars = 100 μm in (A) and (C) and 50 μm in (B) and (D).