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Annual Plant Reviews
Book Title: Phosphorus Metabolism in Plants/ Plaxton W.C., Lambers H.
Acquisition of phosphate from the soil and its distribution across plant tissues, as well as between the cytosol and organelles, is dependent on an array of transporters, which include proton-phosphate cotransporters belonging to the family of PHT proteins, the PHO1 phosphate exporter, as well as organellar phosphate exchangers. The expression of these transporters is regulated both at the transcriptional and post-transcriptional levels, and their activity and localisation is controlled by modifications such as phosphorylation and ubiquitination. Proteins including the PHR1 and WRKY6 transcription factors, PHO2 and NLA involved in ubiquitination, as well as SPX proteins, form a network which enables plants to regulate phosphate transport activity under both nutrient-sufficient and -deficient conditions, allowing them to survive, grow and produce seeds under adverse conditions.
Phosphate transporters, PHT1, PHT2, PHT3, PHT4, PHO1, PHR1, PHO2, SPX, phosphorylation, ubiquitination
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