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Gupta KJ, Igamberdiev AU. Reactive Nitrogen Species in Mitochondria and Their Implications in Plant Energy Status and Hypoxic Stress Tolerance. Front Plant Sci. 2016;7:369doi: 10.3389/fpls.2016.00369.
Gupta, K. J., & Igamberdiev, A. U. (2016). Reactive Nitrogen Species in Mitochondria and Their Implications in Plant Energy Status and Hypoxic Stress Tolerance. Frontiers in plant science, 7369. https://doi.org/10.3389/fpls.2016.00369
Gupta, Kapuganti Jagadis, and Igamberdiev, Abir U. "Reactive Nitrogen Species in Mitochondria and Their Implications in Plant Energy Status and Hypoxic Stress Tolerance." Frontiers in plant science vol. 7 (2016): 369. doi: https://doi.org/10.3389/fpls.2016.00369
Gupta KJ, Igamberdiev AU. Reactive Nitrogen Species in Mitochondria and Their Implications in Plant Energy Status and Hypoxic Stress Tolerance. Front Plant Sci. 2016 Mar 24;7:369. doi: 10.3389/fpls.2016.00369. eCollection 2016. PMID: 27047533; PMCID: PMC4806263.
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Front Plant Sci. 2016 Mar 24;7:369. doi: 10.3389/fpls.2016.00369. eCollection 2016.

Reactive Nitrogen Species in Mitochondria and Their Implications in Plant Energy Status and Hypoxic Stress Tolerance.

Frontiers in plant science

Kapuganti Jagadis Gupta, Abir U Igamberdiev

Affiliations

  1. National Institute of Plant Genome Research New Delhi, India.
  2. Department of Biology, Memorial University of Newfoundland, St. John's NL, Canada.

PMID: 27047533 PMCID: PMC4806263 DOI: 10.3389/fpls.2016.00369

Abstract

Hypoxic and anoxic conditions result in the energy crisis that leads to cell damage. Since mitochondria are the primary organelles for energy production, the support of these organelles in a functional state is an important task during oxygen deprivation. Plant mitochondria adapted the strategy to survive under hypoxia by keeping electron transport operative even without oxygen via the use of nitrite as a terminal electrons acceptor. The process of nitrite reduction to nitric oxide (NO) in the mitochondrial electron transport chain recycles NADH and leads to a limited rate of ATP production. The produced ATP alongside with the ATP generated by fermentation supports the processes of transcription and translation required for hypoxic survival and recovery of plants. Non-symbiotic hemoglobins (called phytoglobins in plants) scavenge NO and thus contribute to regeneration of NAD(+) and nitrate required for the operation of anaerobic energy metabolism. This overall operation represents an important strategy of biochemical adaptation that results in the improvement of energy status and thereby in protection of plants in the conditions of hypoxic stress.

Keywords: hypoxia; mitochondria; nitric oxide; peroxynitrite; superoxide

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