Nitrate nutrition improves energy efficiency under hypoxic stress

Plants take up and assimilate nitrogen (N) in the form of nitrate (NO3) or ammonium (NH4+), or a combination of both. When oxygen availability is reduced (hypoxia), plants need to generate energy to survive and protect themselves against the hypoxia-induced damage.

Diagram of the chemical process

Wany et al. investigate the role of NO3 or NH4+ on increasing energy efficiency under hypoxia in Arabidopsis. They find that hypoxic stress under NO3 nutrition leads to increased nitrate reductase activity, nitric oxide (NO) production, class 1 phytoglobin gene expression, and in turn ATP production. These effects were reduced under NH4+ nutrition. The results indicate that NO3nutrition influences multiple factors in order to increase energy efficiency under hypoxia.

Further reading

Wany, A., Gupta, A. K., Kumari, A., Mishra, S., Singh, N., Pandey, S., … Gupta, K. J. (2018). Nitrate nutrition influences multiple factors in order to increase energy efficiency under hypoxia in Arabidopsis. Annals of Botany, 123(4), 691–705. https://doi.org/10.1093/aob/mcy202