Jan 18, 2018

Reactive oxygen species, nitric oxide production and antioxidant gene expression during development of aerenchyma formation in wheat

Plant Signaling & Behavior
Aakanksha Wany, Kapuganti Jagadis Gupta

Abstract

In response to hypoxia, plant roots produce very high levels of nitric oxide. Recently, it was demonstrated that NO and ethylene both are essential for development of aerenchyma in wheat roots under hypoxia. Increased NO under hypoxia correlated with induction of NADPH oxidase gene expression, ROS production and lipid peroxidation in cortical cells. Tyrosine nitration was prominent in cells developing aerenchyma suggesting that NO and ROS play a key role in development of aerenchyma. However, the role of antioxidant genes during development of aerenchyma is not known, therefore, we checked gene expression of various antioxidants such as SOD1, AOX1A, APX and MnSOD at different time points after hypoxia treatment and found that expression of these genes elevated in 2 h but downregulated in 24 h where development of aerenchyma is prominent. Further, we found that plants growing under ammonium nutrition displayed delayed aerenchyma development. Taken together, new insights presented in this short communication highlighted additional regulatory role of antioxidants gene expression during aerenchyma development.

  • References19
  • Citations3

Citations

Mentioned in this Paper

Genes
SOD2 protein, human
Antioxidant Effect
Antioxidants
Response to Hypoxia
NADPH Oxidase
Superoxides
SOD1 gene
Ammonium
Gene Expression

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