2.A.1.9.9
Inorganic phosphate transporter 1-1 (AtPht1;1; APT2, PHT1) (H⁺/Pi cotransporter).  A Brassica napus homologue, Pht1;4, catalyzes phosphate uptake and affects root architecture (Ren et al. 2014). The phylogeny and expression levels in plant tissues of the proteins of this family in potato have been examined (Liu et al. 2017). The chrysanthemum Pht1;2 is induced in the roots by phosphate starvation (Liu et al. 2018). It is induced by low inorganic phosphate in Spirodela polyrrhiza, a floating plant widely used in biomass utilization and eutrophication phytoremediation (Deng et al. 2021). There are five PHT families in A. thaliana, Pht1 - 5, not all of which are homologous; 57 PHTs are present in soybean (Glycine max), belonging to the PHT1 - 5 families with TC#s (1) 2.A.1.9, (2) 2.A.20, (3) 2.A.29, (4) 2.A.1.14 and (5) 2.A.1.2.61 (Wei et al. 2022).