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- W3100485031 endingPage "8441" @default.
- W3100485031 startingPage "8441" @default.
- W3100485031 abstract "The phytohormone auxin and microRNA-mediated regulation of gene expressions are key regulators of plant growth and development at both optimal and under low-temperature stress conditions. However, the mechanistic link between microRNA and auxin in regulating plant cold stress response remains elusive. To better understand the role of microRNA (miR) in the crosstalk between auxin and cold stress responses, we took advantage of the mutants of Arabidopsis thaliana with altered response to auxin transport and signal. Screening of the mutants for root growth recovery after cold stress at 4 °C revealed that the auxin signaling mutant, solitary root 1 (slr1; mutation in Aux/IAA14), shows a hypersensitive response to cold stress. Genome-wide expression analysis of miRs in the wild-type and slr1 mutant roots using next-generation sequencing revealed 180 known and 71 novel cold-responsive microRNAs. Cold stress also increased the abundance of 26–31 nt small RNA population in slr1 compared with wild type. Comparative analysis of microRNA expression shows significant differential expression of 13 known and 7 novel miRs in slr1 at 4 °C compared with wild type. Target gene expression analysis of the members from one potential candidate miR, miR169, revealed the possible involvement of miR169/NF-YA module in the Aux/IAA14-mediated cold stress response. Taken together, these results indicate that SLR/IAA14, a transcriptional repressor of auxin signaling, plays a crucial role in integrating miRs in auxin and cold responses." @default.
- W3100485031 created "2020-11-23" @default.
- W3100485031 creator A5007833906 @default.
- W3100485031 creator A5029934320 @default.
- W3100485031 creator A5052098431 @default.
- W3100485031 creator A5065603060 @default.
- W3100485031 date "2020-11-10" @default.
- W3100485031 modified "2023-10-17" @default.
- W3100485031 title "Aux/IAA14 Regulates microRNA-Mediated Cold Stress Response in Arabidopsis Roots" @default.
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