Abstract
Phosphorus is one of the essential mineral nutrients required by all living cells. Phosphate mobilization into the plant is a complex process in which the absorption and translocation of this major nutrient are determined largely by the phosphate (Pi) transporters. In this paper, the recent progress on the plant phosphate (Pi) transporter genes, such as the molecular characterizations, expression patterns in response to Pi status, other inorganic nutrients, and the other factors, expression regulations via arbuscular mycorrhizal (AM) symbiosis, mechanisms of transcriptional regulation, functional identification approaches, and the gene engineering perspectives on improvement of plant phosphorus nutrition, etc., have been reviewed. The purpose of this paper is to provide a theoretical basis for further elucidation of the molecular mechanism of Pi transportation mediated by Pi transporters and to promote the generation of elite crop germplasms with a significant improvement in phosphorus use efficiency in the future.
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