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Gene Review

PHT1;1  -  inorganic phosphate transporter 1-1

Arabidopsis thaliana

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High impact information on ATPT1

  • PHF1 expression was detected in all tissues, particularly in roots, flowers, and senescing leaves, and was induced by Pi starvation, thus mimicking the expression patterns of the whole PHT1 gene family [1].
  • In addition to the insensitivity of primary root growth inhibition, when subjected to P deprivation, lpi mutants show a reduced induction in the expression of several genes involved in the P starvation rescue system (PHOSPHATE TRANSPORTER 1 and 2, PURPLE ACID PHOSPHATASE 1, ACID PHOSPHATASE 5, and INDUCED BY PHOSPHATE STARVATION 1) [2].
  • At least eight members of the Arabidopsis Pht1 phosphate (Pi) transporter family are expressed in roots and Pht1;1 and Pht1;4 show the highest transcript levels [3].
  • The completion of the Arabidopsis thaliana genome has revealed that there are nine members of the Pht1 family of phosphate transporters in this species [4].
  • Four of these promoters were found to direct reporter gene expression in the root epidermis, and were induced under conditions of phosphate deprivation in a manner similar to previously characterised Pht1 genes [4].

Biological context of ATPT1

  • The PHT1 promoter has a desirable character for biotechnological transgene expression in monocot rice plants [5].
  • The PHT1 promoter::GUS fusion gene was constructed and introduced into Arabidopsis and rice by Agrobacterium-mediated transformation [5].


  1. PHOSPHATE TRANSPORTER TRAFFIC FACILITATOR1 is a plant-specific SEC12-related protein that enables the endoplasmic reticulum exit of a high-affinity phosphate transporter in Arabidopsis. González, E., Solano, R., Rubio, V., Leyva, A., Paz-Ares, J. Plant Cell (2005) [Pubmed]
  2. Characterization of low phosphorus insensitive mutants reveals a crosstalk between low phosphorus-induced determinate root development and the activation of genes involved in the adaptation of Arabidopsis to phosphorus deficiency. Sánchez-Calderón, L., López-Bucio, J., Chacón-López, A., Gutiérrez-Ortega, A., Hernández-Abreu, E., Herrera-Estrella, L. Plant Physiol. (2006) [Pubmed]
  3. Phosphate transport in Arabidopsis: Pht1;1 and Pht1;4 play a major role in phosphate acquisition from both low- and high-phosphate environments. Shin, H., Shin, H.S., Dewbre, G.R., Harrison, M.J. Plant J. (2004) [Pubmed]
  4. Expression analysis suggests novel roles for members of the Pht1 family of phosphate transporters in Arabidopsis. Mudge, S.R., Rae, A.L., Diatloff, E., Smith, F.W. Plant J. (2002) [Pubmed]
  5. Promoter of Arabidopsis thaliana phosphate transporter gene drives root-specific expression of transgene in rice. Koyama, T., Ono, T., Shimizu, M., Jinbo, T., Mizuno, R., Tomita, K., Mitsukawa, N., Kawazu, T., Kimura, T., Ohmiya, K., Sakka, K. J. Biosci. Bioeng. (2005) [Pubmed]
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