Biotic and abiotic stress down-regulate miR398 expression in Arabidopsis

  title={Biotic and abiotic stress down-regulate miR398 expression in Arabidopsis},
  author={Guru Jagadeeswaran and Ajay Saini and Ramanjulu Sunkar},
MicroRNA398 targets two Cu/Zn superoxide dismutases (CSD1 and CSD2) in higher plants. Previous investigations revealed both decreased miR398 expression during high Cu2+ or paraquat stress and increased expression under low Cu2+ or high sucrose in the growth medium. Here, we show that additional abiotic stresses such as ozone and salinity also affect miR398 levels. Ozone fumigation decreased miR398 levels that were gradually restored to normal levels after relieved from the stress. Furthermore… CONTINUE READING
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