Claim · model-written summary
Respiratory activity affected radial oxygen loss strongly at 0.5 cm from the apex, less at 1.7 cm and little or not at all at 3 cm.
- Taxon
- Rice
Oryza sativat0 - Treatment
- respiratory activitye1
- Outcome
- ROLe1
- Qualifier
- a little less so at 1.7 cm, but much less or not at all at 3 cm from the apexe1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Intact Rice Roots”
e1“ROL was substantially affected by respiratory activity at 0.5 cm, a little less so at 1.7 cm, but much less or not at all at 3 cm from the apex”
Title
W. ARMSTRONG Physiologia Plantarum 1971. doi:10.1111/j.1399-3054.1971.tb01427.x
Other claims from this paper (11)
- Intervention effect Roots grown in waterlogged soil lost about double the oxygen radially compared with non-waterlogged roots at 23°C.
- Intervention effect Cooling, which lowers respiratory activity, increased radial oxygen loss from rice roots.
- Association Respiratory activity reduced oxygen loss by 8 to 10 × 10 –8 g O2 cm –2 root surface min –1 (about 50%) in non-waterlogged rice roots at 23°C.
- Association Respiratory activity reduced oxygen loss by 4.5 to 5.5 × 10 –8 g O2 cm –2 min –1 (about 30%) in waterlogged rice roots at 23°C.
- Observation At 23°C with respiration inactive, non-waterlogged rice roots had estimated oxygen flux of 15–17 × 10 –8 g O2 cm –2 min –1.
- Observation At 23°C with respiration inactive, waterlogged rice roots had estimated oxygen flux of 20–23 × 10 –8 g O2 cm –2 min –1.
- Mechanism Differences in oxygen loss between waterlogged and non-waterlogged rice roots are probably due to differences in root porosity.
- Observation Radial oxygen loss from rice roots fell rapidly towards the base, reaching near zero at 4–5 cm from the apex in pattern 1.
- Observation Cortical lacunae formed nearer to the apex in rice roots.
- Observation Cortical lacunae were more extensive in waterlogged rice roots.
- Association The drop in respiratory effect on oxygen loss paralleled the formation of cortical lacunae in rice roots.