Polyphosphate-induced changes in transcriptome and root-functional traits elucidate enhanced phosphorus acquisition mechanisms and growth of durum wheat
- Khourchi, S. , Muhovski, Y. , Blum, A. , Jáuregui, I. , De Clerck, C. , Bargaz, A. & Delaplace, P. (2025). Polyphosphate-induced changes in transcriptome and root-functional traits elucidate enhanced phosphorus acquisition mechanisms and growth of durum wheat. Plant, Cell & Environment, accepted:
| Type | Journal Article |
| Year | 2025 |
| Title | Polyphosphate-induced changes in transcriptome and root-functional traits elucidate enhanced phosphorus acquisition mechanisms and growth of durum wheat |
| Journal | Plant, Cell & Environment |
| Label | U1-Muhovski |
| Volume | accepted |
| Date | 7 May 2025 |
| Endnote keywords | gene expression, transcriptome, phosphatases, phosphorus, polyphosphates, rhizosphere processes |
| Abstract | Phosphate (P) fertilization impacts many rhizosphere processes, driving plant P use efficiency. However, less is known about the induced molecular and physiological root-rhizosphere traits in responses to polyphosphates (PolyP), particularly root transcriptome and belowground functional traits responsible for P acquisition. The present study aims to investigate physiological and transcriptomic belowground mechanisms explaining the enhanced durum wheat P acquisition under PolyP (PolyB and PolyC) supply. Root molecular traits were differentially expressed in response to PolyP, where PolyB induced up-regulation of OGDH, MDH, and ENO, PAP21 and down-regulation of PFK, and LDH genes. The modulation of gene expression can presumably explain the PolyP-induced changes in rhizosphere (root, rhizosphere soil, soil solution) acidification (pH decreased from 8 to 6.3) and acid phosphatase activities, which were concomitant with enhanced rhizosphere soil P availability and shoot Pi content (145% and 36% compared to OrthoP, respectively) along with changes in morphological and transcriptomic root (particularly, the up-regulation of AUX1 and ABA transporter genes) traits. These findings provide novel insights that P acquisition from polyphosphates involves the coordinated regulation of genes governing root–rhizosphere processes and root development, ultimately enhancing wheat P acquisition. |
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| Authors | Khourchi, S., Muhovski, Y., Blum, A., Jáuregui, I., De Clerck, C., Bargaz, A., Delaplace, P. |
