Claim · model-written summary
The authors proposed that higher catalase activity may reduce keto acid peroxidation by photorespiratory peroxide.
- Taxon
- tobacco
Nicotiana tabacumt0 - Outcome
- nonenzymatic peroxidation of keto-acidse0
- Direction
- decreasee0
- Qualifier
- higher catalase activitye0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher catalase activity in the mutant may decrease the nonenzymatic peroxidation of keto-acids such as hydroxypyruvate and glyoxylate by photorespiratory H(2)O(2)”
t0“Tobacco”
Title
Israel Zelitch PLANT PHYSIOLOGY 1990. doi:10.1104/pp.92.2.352
Other claims from this paper (9)
- Observation Mutant M(4) progeny had greater net photosynthesis than wild type at 21 and 42% O(2).
- Observation About 60% of M(4) progeny segregated high catalase phenotypes averaging 40% greater than wild type.
- Association High catalase phenotype cosegregated with oxygen resistant photosynthesis.
- Observation About 25% of F(1) progeny had high catalase activity regardless of mutant parent sex, indicating nuclear inheritance.
- Observation NADH-hydroxypyruvate reductase activity in high-catalase mutants matched wild type.
- Observation Mutants released 15% less photorespiratory CO(2) at 21% O(2).
- Observation Mutants released 36% less photorespiratory CO(2) at 42% O(2).
- Observation Mutant leaf tissue released less labeled CO(2) per glycolate metabolized than wild type.
- Mechanism The authors attributed oxygen resistant photosynthesis to decreased photorespiration.