A plant microRNA regulates the adaptation of roots to drought stress

Hao Chen, Zhuofu Li, Liming Xiong*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

111 Citations (Scopus)

Abstract

Plants tend to restrict their horizontal root proliferation in response to drought stress, an adaptive response mediated by the phytohormone abscisic acid (ABA) in antagonism with auxin through unknown mechanisms. Here, we found that stress-regulated miR393-guided cleavage of the transcripts encoding two auxin receptors, TIR1 and AFB2, was required for inhibition of lateral root growth by ABA or osmotic stress. Unlike in the control plants, the lateral root growth of seedlings expressing miR393-resistant TIR1 or AFB2 was no longer inhibited by ABA or osmotic stress. Our results indicate that miR393-mediated attenuation of auxin signaling modulates root adaptation to drought stress.

Original languageEnglish
Pages (from-to)1742-1747
Number of pages6
JournalFEBS Letters
Volume586
Issue number12
DOIs
Publication statusPublished - 12 Jun 2012

Scopus Subject Areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

User-Defined Keywords

  • Abscisic acid
  • Auxin
  • Lateral root
  • MicroRNA
  • Osmotic stress

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