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. 2003 Jan;131(1):114–128. doi: 10.1104/pp.013086

Figure 4.

Figure 4

Tissue and cellular specificity of AtPP2-A1 and AtPP2-A2 gene expression. A through C, Histochemical localization in transgenic tobacco and Arabidopsis plants of AtPP2-A1 and AtPP2-A2 promoter:GUS fusions. A, GUS expression directed by approximately 1 kb of 5′-flanking region from AtPP2-A1 in a cross-section of a transgenic tobacco stem. B, GUS expression directed by approximately 1 kb of 5′-flanking region from AtPP2-A1 in an Arabidopsis seedling. C, GUS expression directed by approximately 1 kb of 5′-flanking region from AtPP2-A2 in an Arabidopsis seedling. D through I, Localization of mRNA encoding the AtPP2-A1 and AtPP2-A2 in the phloem of Arabidopsis floral stem by in situ hybridization, using oligonucleotide probes. E, H, and I, Localization of mRNA encoding AtPP2-A1 (E, 63×; H, 5×; I, details 63×). G, Localization of mRNA encoding AtPP2-A2 (63×). D and F, Sense oligonucleotide probe (negative control) for AtPP2-A1 (D; 63×) and AtPP2-A2 (F; 63×).