Journal of
Medicinal Plants Research

  • Abbreviation: J. Med. Plants Res.
  • Language: English
  • ISSN: 1996-0875
  • DOI: 10.5897/JMPR
  • Start Year: 2007
  • Published Articles: 3832


Nitric oxide biochemistry, mode of action and signaling in plants

A. N. Misra*, M. Misra and R. Singh
Department of Biology and Biotechnology (DBT-BIF and DST-FIST Department), School of Biotechnology, Fakir Mohan University, Jnan Bigyan Vihar, Balasore-756020, India.
Email: [email protected]

  •  Accepted: 03 August 2010
  •  Published: 29 December 2010


Nitric oxide (NO) is a gaseous diatomic radical with a wide variety of physiological and pathological implications in animal, plant and microbes. NO reacts directly with metal complexes and other radicals and indirectly as a reactive nitrogen oxide species with DNA, proteins, and lipids. In animals, NO is a signal transduction element that is synthesized by nitric oxide synthase (NOS) enzyme from L-arginine that functions in many tissues and interacts with multiple target compounds in neurotransmission, vascular smooth muscle relaxation, and platelet inhibition. In plants; NO is synthesized enzymatically by NOS like enzyme, nitrate reductase, nitrite reductase etc. and also by non-enzymatically. NO play a diverse role in plant system including plant growth, stomatal movement, iron homeostasis, protection against biotic and abiotic stresses, senescence etc.


Key words: Nitric oxide (NO), nitric oxide synthase (NOS), nitrate reductase (NR), reactive oxygen species (ROS), c-GMP, L-Arginine.