Table 1. Induction of mycorrhiza-specific phosphate transporters in plant species of different taxonomic positions.

	Promoter region fused to GUS
Plants studied	StPT3	MtPT4	OsPT11
Eudicots
Asteridae
Solanales
Solanum tuberosum	+, G.m., P	+, G.m., P	—, G.m., P
Petunia hybrida	+, G.m.,I
Apiales
Daucus carota	+, G.L., P
Rosidae
Fabales
Lotus japonicus	+, G. mos., I
Medicago truncatula	+, G.mos., I	+, G.mos., I	—, G.mos., I

Potato (S. tuberosum) and carrot (D. carota) transgenic hairy roots. L. japonicus, and M. truncatula composite plants with transgenic hairy roots and transgenic petunia (Petunia × hybrida) were generated by means of agrobacterial transformation with constructs carrying promoter regions of mycorrhiza-specific phosphate transporters from potato (StPTs; 1.72 Kb), M. truncatula (MtPT4; 0.87 Kb), and rice (O. sativa) (OsPT11; 0.8, 1.54, and 3.16 Kb) fused to the GUS reporter gene. Roots were inoculated with one of three AMF species: G.m., Gigaspora margarita; G.i., Glomus intraradices; and G. mos., Glomus mosseae. Mycorrhizal roots were stained for GUS activity. +, Positive GUS staining in root zones colonized by AMF; —, absence of GUS staining. P and I indicate formation of either Paris- or intermediate-type AM, respectively.