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Which role for nitric oxide in symbiotic N2-fixing nodules: toxic by-product or useful signaling/metabolic intermediate?
- Source :
- Frontiers in Plant Science, Frontiers in Plant Science, Frontiers, 2013, 4, pp.1-6. ⟨10.3389/fpls.2013.00384⟩, Frontiers in Plant Science (4), 1-6. (2013), Frontiers in Plant Science, Vol 4 (2013)
- Publication Year :
- 2013
- Publisher :
- HAL CCSD, 2013.
-
Abstract
- International audience; The interaction between legumes and rhizobia leads to the establishment of a symbiotic relationship characterized by the formation of new organs called nodules, in which bacteria have the ability to fix atmospheric nitrogen (N2) via the nitrogenase activity. Significant nitric oxide (NO) production was evidenced in the N2-fixing nodules suggesting that it may impact the symbiotic process. Indeed, NO was shown to be a potent inhibitor of nitrogenase activity and symbiotic N2 fixation. It has also been shown that NO production is increased in hypoxic nodules and this production was supposed to be linked - via a nitrate/NO respiration process - with improved capacity of the nodules to maintain their energy status under hypoxic conditions. Other data suggest that NO might be a developmental signal involved in the induction of nodule senescence. Hence, the questions were raised of the toxic effects versus signaling/metabolic functions of NO, and of the regulation of NO levels compatible with nitrogenase activity. The present review analyses the different roles of NO in functioning nodules, and discusses the role of plant and bacterial (flavo)hemoglobins in the control of NO level in nodules.
- Subjects :
- formation des nodules
0106 biological sciences
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences
nodosité racinaire
Plant Science
01 natural sciences
Nod factor
chemistry.chemical_compound
rhizobium
métabolisme intermédiaire
legume
nitric oxide
nitrogen fixation
symbiosis
nitrogénase
relation symbiotique
oxyde nitrique
bactérie
0303 health sciences
Vegetal Biology
biology
fixation de l'azote de l'air
Nitrogenase
Agricultural sciences
Biochemistry
flavobacterium
fixation de l'azote
Nitrogen fixation
Rhizobium
medicine.symptom
symbiose
nodule
lcsh:Plant culture
légumineuse
Nitric oxide
Rhizobia
Mini Review Article
03 medical and health sciences
Symbiosis
Botany
medicine
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
lcsh:SB1-1110
sénescence nodulaire
030304 developmental biology
azote atmosphérique
nodule hypoxique
azote symbiotique
hypoxie
Nodule (medicine)
biology.organism_classification
chemistry
Sciences agricoles
Biologie végétale
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 1664462X
- Database :
- OpenAIRE
- Journal :
- Frontiers in Plant Science, Frontiers in Plant Science, Frontiers, 2013, 4, pp.1-6. ⟨10.3389/fpls.2013.00384⟩, Frontiers in Plant Science (4), 1-6. (2013), Frontiers in Plant Science, Vol 4 (2013)
- Accession number :
- edsair.doi.dedup.....d89d47f6298b674a4f6566ad15827aff