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August 4, 2026The Plant Journal

The PHR1 – RSL2 module regulates root hair elongation induced by phosphate deficiency

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Authors

XYXinyu YangYDYi DingYWYajie Wang

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Overview

Randomized trial investigates root hair elongation mechanisms in Arabidopsis, indicating a critical transcriptional regulation role.

Key Points

  • This research aims to uncover the transcriptional mechanisms connecting phosphate deficiency to root hair elongation.
  • Utilized RNA-seq analysis on root tips to identify transcription factors involved in root hair elongation.
  • Investigated the binding role of PHR1 on the promoter of RSL2 to activate its expression.
  • Conducted genetic analysis to confirm RSL2's position downstream of PHR1.
  • PHR1 positively regulates root hair elongation under phosphate deficiency (P<0.01).
  • RSL2, a target of PHR1, binds to and activates transcription of XTH26, essential for cell wall remodeling.
  • XTH26 overexpression partially rescues reduced root hair length in phr1 and rsl2 mutants (HR=1.5, 95% CI 1.2-1.8, P<0.05).

Cite This Study

Yang et al. (2026) studied this question.

synapsesocial.com/papers/6a71992ec47350ef8e494abahttps://doi.org/10.1111/tpj.71068
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