Claim · model-written summary
Nitrite-dependent oxygen evolution in crabgrass mesophyll cells was light-dependent.
- Taxon
- crabgrasse0
- Organ / stage
- mesophyll cellse0
- Treatment
- lighte1
- Outcome
- NO(2) (-) -dependent O(2) evolutione1
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier
Verbatim
e0“Isolated crabgrass mesophyll cells”
e1“The NO(2) (-) -dependent O(2) evolution is light-dependent”
Title
Randy Moore; Clanton C. Black PLANT PHYSIOLOGY 1979. doi:10.1104/pp.64.2.309
Other claims from this paper (13)
- Observation Nitrate and nitrate reductase were localized in crabgrass mesophyll cells.
- Observation Glutamine synthetase was nearly equally distributed between the two crabgrass cell types.
- Observation About 67% of crabgrass glutamate synthase activity was in bundle sheath and 33% in mesophyll.
- Observation About 80% of crabgrass glutamate dehydrogenase activity was in bundle sheath.
- Observation NADH-dependent glutamate dehydrogenase activity was 2.5-fold higher than the NADPH-dependent form.
- Observation Isolated crabgrass mesophyll cells reduced nitrite with oxygen evolution but were inactive with nitrate.
- Intervention effect The inhibitor DCMU inhibited nitrite-dependent oxygen evolution.
- Intervention effect Photophosphorylation uncouplers stimulated nitrite-dependent oxygen evolution.
- Observation Oxygen evolved per nitrite reduced was 1.45 in coupled experiments.
- Observation Oxygen evolved per nitrite reduced was 0.67 in uncoupled experiments.
- Observation Crabgrass bundle sheath strands were inactive in oxygen evolution with nitrate or nitrite.
- Mechanism The authors proposed distinct nitrogen-assimilation schemes for ammonium and nitrate use in crabgrass.
- Mechanism The authors proposed that cell division of labor partly explains greater nitrogen use efficiency in crabgrass and other C4 plants.