Figure 2.

Phenotype of the wild type and selected transgenic hybrid aspen lines, and the expression of the reporter gene GUS and iaaM gene in transgenic line G trees. A, Trees from the wild type and the transgenic lines C, G, H, and O with an approximate height of 1 m. B, Close-up image of the phenotype of a wild-type and a line G tree. Note the vigorous bursting of the axillary buds in the wild type, and the hyponastic leaves in line G. C, GUS activity in a transverse section from the base of the stem. D, In situ hybridization of the iaaM gene in a transverse section from the base of the stem. Co, Cortex; P, phloem; CZ, cambial zone; X, xylem.