Emerging roles of microRNAs in the mediation of drought stress response in plants

This review summarizes recent molecular studies on the miRNAs involved in the regulation of drought-responsive genes, with emphasis on miRNA-associated regulatory networks involved in drought stress response

Yanfei Ding; Yueliang Tao; Cheng Zhu

2013

Scholarcy highlights

  • MicroRNAs are a class of 21-nucleotide noncoding small RNAs, playing negative regulatory roles in gene expression at the post-transcriptional level
  • Many miRNAs have been shown to be involved in drought stress responses, including Abscisic acid response, auxin signalling, osmoprotection, and antioxidant defence, by downregulating the respective target genes encoding regulatory and functional proteins
  • This review summarizes recent molecular studies on the miRNAs involved in the regulation of drought-responsive genes, with emphasis on miRNA-associated regulatory networks involved in drought stress response
  • This review focuses on the miRNA-associated regulatory networks involved in drought stress response, thereby helping
  • MYB transcription factors were found to bind cis-elements in the dehydration-responsive gene response to dehydration 22 promoter and cooperatively activate RD22. Overexpression of both MYC2 and MYB2 improved osmotic stress tolerance of the transgenic plants. These results suggest that MYB are positive regulators of ABA signalling, and miR159 may play a key role in ABA response by directing the degradation of MYB mRNAs in Arabidopsis
  • Many genes in the auxin signalling cascade have been confirmed as targets of miRNAs, which in turn identified to be regulated under drought and ABA response

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