ArticlePlant physiology2022
PtoWRKY40 interacts with PtoPHR1-LIKE3 while regulating the phosphate starvation response in poplar.
Article in Plant physiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed.
- Integrated pangenomics and population genomics reveal climate adaptation and maladaptation in an East Asian tree.Nature communications · 2026Article
- Genome-wide characterization of the PHT gene family in Uncaria rhynchophylla identified UrPHT1;11 as a key regulator to low phosphorus response.BMC plant biology · 2026Article
- Low phosphorus promotes caryophyllene biosynthesis by regulating AaTPS3 in Artemisia argyi.Plant cell reports · 2026Article
- An updated sulfate transporter phylogeny uncovers a perennial-specific subgroup associated with lignification.Tree physiology · 2025Article
- Genome-Wide Identification of theInternational journal of molecular sciences · 2025Article
- Plant Signaling Hormones and Transcription Factors: Key Regulators of Plant Responses to Growth, Development, and Stress.Plants (Basel, Switzerland) · 2025Review
- Decoding PHR-Orchestrated Stress Adaptation: A Genome-Wide Integrative Analysis of Transcriptional Regulation Under Abiotic Stress inInternational journal of molecular sciences · 2025Article
- Genome-wide identification of MYB gene family and exploration of selenium metabolism-related candidates in paper mulberry (Broussonetia papyrifera).Plant cell reports · 2025Article
- CsPHRs-CsJAZ3 incorporates phosphate signaling and jasmonate pathway to regulate catechin biosynthesis inHorticulture research · 2024Article
- Characterization and stress-responsive regulation of CmPHT1 genes involved in phosphate uptake and transport in Melon (Cucumis melo L.).BMC plant biology · 2024Article
- WRKY33 negatively regulates anthocyanin biosynthesis and cooperates with PHR1 to mediate acclimation to phosphate starvation.Plant communications · 2024Article
- Phosphorus uptake, transport, and signaling in woody and model plants.Forestry research · 2024Review
- Multifaceted roles of WRKY transcription factors in abiotic stress and flavonoid biosynthesis.Frontiers in plant science · 2023Review
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10 authors.
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Abstract
Plants usually suffer from phosphorus starvation because of the low inorganic phosphate (Pi) status of most soils. To cope with this, plants have evolved an adaptive phosphate starvation response (PSR) which involves both developmental and metabolic changes regulated mainly by PHOSPHATE STARVATION RESPONSE1 (PHR1) and its homologs. Here, we elucidated how perennial woody plants, such as poplars (Populus spp.), respond to low-Pi stress. We first performed RNA-seq analysis of low-Pi-treated poplars and identified PtoWRKY40 is rapidly downregulated and protein degraded after stress. Overexpressing and knocking-down PtoWRKY40 downregulated and upregulated the expression of Pi starvation signaling genes, respectively, such as PHOSPHATE TRANSPORTER1 (PHT1)-type genes and PURPLE ACID PHOSPHATASE genes. PtoWRKY40 bound to the W box in the promoter of several PtoPHT1s and repressed their expression. Moreover, PtoWRKY40 interacted with PtoPHR1-LIKE3 (PtoPHL3), a PHR1 homolog in poplar, to inhibit the latter binding to the P1BS element and thus reduced PtoPHT1s' transcription under Pi-sufficient conditions. However, Pi deficiency decreased PtoWRKY40 abundance and therefore released its inhibition on PHT1s. In conclusion, we have uncovered a PSR mechanism mediated by PtoWRKY40 and PtoPHL3 which regulates Pi content in poplars, deepening our understanding of how poplars adapt to diverse Pi conditions and regulate appropriate responses to maintain Pi homeostasis.
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