Abstract
Uptake and translocation of 22Na were determined after labelled aerosol deposition on primary leaves of the 12-14 day old string bean plant, Phaseolus vulgaris var. green pod Landreth. Plants were grown under standardized humidity and light conditions, and following the aerosol exposure they were maintained for a subsequent 24 hour period under one of the following lighting conditions: continuous light, cyclic light, continuous dark. In the last two groups, humidity also was varied systematically. Labelled aerosol was produced as a monodisperse particle by a modified version of the Sinclair-LaMer glycerol generator. Leaf absorption was determined as the radioactivity remaining in the leaf after 6 seconds elution in iso-osmotic mannitol solution (0.36 M). With this elution procedure about 20 percent of the isotope remained fixed in the leaf--a fraction removable only very slowly by continued elution. Compared to light, dark conditions caused nearly total cessation of radioactivity transport to stem and to root. Leaf radioactivity did not change appreciably in dark. Lowered humidity had inhibitory effect on leaf absorption and on normal transport to stem and root maintained photosynthetically. Aerosol exposure caused disturbance of normal leaf metabolism, judged by polarographic assays in sections of exposed leaves which had recuperated from sectioning injury. At atypically high levels of glycerol deposition (18 micrograms/sq cm leaf) O2 uptake was inhibited as well as O2 evolution. However, at the lower levels (e.g. 6 micrograms/sq cm leaf) only O2 evolution was inhibited, showing about half of maximal O2 evolution rates characteristic of this plant. (Author)
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Dark conditions caused a nearly total cessation of 22Na transport to stem and root compared with light.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarise0 - Treatment
- dark conditionse1
- Outcome
- transport to stem and to roote1
- Direction
- nearly total cessatione1
- Comparator
- lighte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake and translocation of 22Na were determined after labelled aerosol deposition on primary leaves of the 12-14 day old string bean plant, Phaseolus vulgaris var. green pod Landreth”
e1“Compared to light, dark conditions caused nearly total cessation of radioactivity transport to stem and to root”
Claim · model-written summary
Leaf radioactivity did not change appreciably in darkness.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Organ / stage
- leafe2
- Treatment
- darke2
- Outcome
- Leaf radioactivitye2
- Direction
- did not changee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake and translocation of 22Na were determined after labelled aerosol deposition on primary leaves of the 12-14 day old string bean plant, Phaseolus vulgaris var. green pod Landreth”
e2“Leaf radioactivity did not change appreciably in dark”
Claim · model-written summary
Lowered humidity inhibited leaf absorption of 22Na.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Organ / stage
- leafe3
- Treatment
- Lowered humiditye3
- Outcome
- leaf absorptione3
- Direction
- inhibitory effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake and translocation of 22Na were determined after labelled aerosol deposition on primary leaves of the 12-14 day old string bean plant, Phaseolus vulgaris var. green pod Landreth”
e3“Lowered humidity had inhibitory effect on leaf absorption and on normal transport to stem and root maintained photosynthetically”
Claim · model-written summary
Lowered humidity inhibited normal transport of 22Na to stem and root.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Organ / stage
- stem and roote3
- Treatment
- Lowered humiditye3
- Outcome
- transport to stem and roote3
- Direction
- inhibitory effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake and translocation of 22Na were determined after labelled aerosol deposition on primary leaves of the 12-14 day old string bean plant, Phaseolus vulgaris var. green pod Landreth”
e3“Lowered humidity had inhibitory effect on leaf absorption and on normal transport to stem and root maintained photosynthetically”
Claim · model-written summary
Aerosol exposure caused disturbance of normal leaf metabolism, judged by polarographic assays.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Organ / stage
- leafe4
- Treatment
- Aerosol exposuree4
- Outcome
- normal leaf metabolisme4
- Direction
- caused disturbancee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake and translocation of 22Na were determined after labelled aerosol deposition on primary leaves of the 12-14 day old string bean plant, Phaseolus vulgaris var. green pod Landreth”
e4“Aerosol exposure caused disturbance of normal leaf metabolism”
Claim · model-written summary
At high glycerol deposition (18 micrograms/sq cm leaf), O2 uptake was inhibited.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Organ / stage
- leafe5
- Treatment
- high levels of glycerol deposition (18 micrograms/sq cm leaf)e5
- Outcome
- O2 uptakee5
- Direction
- was inhibitede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake and translocation of 22Na were determined after labelled aerosol deposition on primary leaves of the 12-14 day old string bean plant, Phaseolus vulgaris var. green pod Landreth”
e5“At atypically high levels of glycerol deposition (18 micrograms/sq cm leaf) O2 uptake was inhibited as well as O2 evolution”
Claim · model-written summary
At high glycerol deposition (18 micrograms/sq cm leaf), O2 evolution was also inhibited.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Organ / stage
- leafe5
- Treatment
- high levels of glycerol deposition (18 micrograms/sq cm leaf)e5
- Outcome
- O2 evolutione5
- Direction
- inhibitede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake and translocation of 22Na were determined after labelled aerosol deposition on primary leaves of the 12-14 day old string bean plant, Phaseolus vulgaris var. green pod Landreth”
e5“At atypically high levels of glycerol deposition (18 micrograms/sq cm leaf) O2 uptake was inhibited as well as O2 evolution”
Claim · model-written summary
At low glycerol deposition (6 micrograms/sq cm leaf), O2 evolution was inhibited to about half of maximal rates.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise0
- Organ / stage
- leafe6
- Treatment
- lower levels (e.g. 6 micrograms/sq cm leaf)e6
- Outcome
- O2 evolutione6
- Direction
- inhibitede6
- Value
- about halfe6
- Comparator
- maximal O2 evolution ratese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake and translocation of 22Na were determined after labelled aerosol deposition on primary leaves of the 12-14 day old string bean plant, Phaseolus vulgaris var. green pod Landreth”
e6“at the lower levels (e.g. 6 micrograms/sq cm leaf) only O2 evolution was inhibited, showing about half of maximal O2 evolution rates characteristic of this plant”
The same questions in other papers
humidity · nutrient: content · Phaseolus vulgaris (common bean)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.