Claim · model-written summary
Total peroxidase activity was 21% less in heat-injured incubated embryos than in controls.
- Taxon
- Red Kidney Beant0
- Treatment
- heat-injurede0
- Outcome
- total peroxidase activitye0
- Direction
- lesse0
- Value
- 21%e0
- Comparator
- controlse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Verbatim
e0“total peroxidase activity was 21% less in heat-injured incubated embryos than in controls”
t0“Red Kidney Bean”
Title
S. M. Siegel Botanical Gazette 1953. doi:10.1086/335772
Other claims from this paper (19)
- Intervention effect Isolated Red Kidney bean embryos incubated in light grew more than those in darkness.
- Observation The relative effect of light was greater after exposure of embryos to 100⚬ C.
- Intervention effect Heat injury to embryos was markedly limited when they were heated under reduced oxygen tension.
- Intervention effect Application of cysteine to heat-injured embryos was compensatory to a limited extent.
- Intervention effect Indole-3-acetic acid inhibited elongation of control untreated embryos.
- Intervention effect Indole-3-acetic acid stimulated elongation of heat-injured plants.
- Observation Respiratory activity of heat-injured embryos recovered from about 16% of the control after 1 hour to 80% of the control after 50 hours of incubation.
- Observation Respiratory quotients of entire embryos were approximately one, with no consistent differences between control and treated groups.
- Observation One-third of heat-treated embryos showed a malformation with segmentation of the basal hypocotyl; malformed embryos had only a remnant of pith whereas controls had a solid pith cylinder.
- Observation Development of root hairs was retarded in heat-injured embryos.
- Intervention effect Neither amyloclastic nor catalase activity was materially affected by the temperature treatment.
- Intervention effect Peroxidase activities of treated plumule-plus-bud and hypocotyl were similar to those of control organs.
- Intervention effect Treated incubated roots had only one-fifth as much peroxidase activity as control incubated roots.
- Intervention effect Five times as much soluble carbohydrate was lost from heat-injured tissues as from controls.
- Observation Neither starch nor nitrogen loss from embryos was detected in leachates.
- Mechanism The authors conclude that oxidation is an important factor in heat injury in Red Kidney bean embryos and its effects are largely irreversible.
- Association Of the metabolic features studied, only the localized reduction in root peroxidase can be correlated with loss of viability.
- Observation Gross color tests for viability were entirely unsuitable for distinguishing nonviable from viable individuals.
- Mechanism The authors suggest that in many respects heat injury may operate as an accelerated aging process.