Claim · model-written summary
Nitrate increased nodule oxygen diffusion resistance during days 0–2.
- Taxon
- pea (Pisum sativum L. cv Frilene)
Lathyrus oleraceust0 - Treatment
- nitratet1
- Outcome
- oxygen diffusion resistance of nodulese0
- Direction
- increasese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first stage (0-2 d), there were major decreases in N2ase activity and N2ase-linked respiration and concomitant increases in carbon cost of N2ase and oxygen diffusion resistance of nodules.”
t0“pea (Pisum sativum L. cv Frilene)”
t1“short-term nitrate application”
Title
Involvement of Activated Oxygen in Nitrate-Induced Senescence of Pea Root Nodules
P. R. Escuredo; F. R. Minchin; Y. Gogorcena; et al. PLANT PHYSIOLOGY 1996. doi:10.1104/pp.110.4.1187
Other claims from this paper (14)
- Intervention effect Nitrate reduced nodule nitrogenase activity during days 0–2.
- Intervention effect Nitrate reduced nodule nitrogenase-linked respiration during days 0–2.
- Intervention effect Nitrate increased the carbon cost of nitrogenase during days 0–2.
- Observation Early nitrate response showed no apparent oxidative damage.
- Observation The early nitrogenase decline was partly reversible.
- Observation After two days, nitrate response became essentially irreversible senescence.
- Observation Oxidized proteins and catalytic iron increased in late nitrate-induced senescence.
- Observation Antioxidant enzymes and metabolites decreased in late nitrate-induced senescence.
- Mechanism Restricted oxygen supply to bacteroids may explain initial nitrogenase decline.
- Mechanism Antioxidant protection decline is not involved in initial nitrogenase decline.
- Observation Antioxidant protection decline also occurred with drought stress.
- Observation Nitrate senescence showed no lipid degradation.
- Observation Nitrate senescence showed no lipid peroxide accumulation.
- Mechanism The authors infer lipid peroxidation is not necessary for nodule senescence.