Fig 4. The observation of GUS expression driven by MzPIP2;1 full-length promoter in transgenic Arabidopsis seedlings at different tissues under normal condition.

The transverse section (A), longitudinal section (B) of paraffin sections in stem, root (C) and leaf (D) are observed by light microscope with 600× magnification (objective magnification × eyepiece magnification = 60×10).