Abstract
When Brassica oleracea L. was exposed to 0.2 mul l(-1) H2S the sulfate uptake measured during a dark or light period was decreased to the same extent. Both the xylem loading and the net sulfate uptake rate were decreased by 42% after 6 days of exposure to 0.4 mul l(-1) H2S. This suggested that the xylem loading was not the limiting factor in the uptake of sulfate by the roots. When Brassica oleracea L. was exposed to 0.4 mul l(-1) H2S and grown on a nutrient solution containing S-35-sulfate, the specific radioactivity of the labeled S of the insoluble fraction (mainly proteins) of the shoot and roots was decreased more than the specific radioactivity of the labeled S of the soluble fraction (mainly sulfate). This demonstrated that the major proportion of the metabolized atmospheric H2S was incorporated into proteins. The change in partitioning of the labeled sulfur upon H2S exposure was similar in the roots compared to the shoot, which suggested that the roots were dependent on the shoot for their organic sulfur supply.
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Claims 8
Claim · model-written summary
0.2 mul l(-1) H2S decreased sulfate uptake equally in dark and light.
- Taxon
- Brassica oleracea L.
Brassica oleraceae0 - Treatment
- 0.2 mul l(-1) H2Se0
- Outcome
- sulfate uptakee0
- Direction
- decreasede0
- Qualifier
- dark or light periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When Brassica oleracea L. was exposed to 0.2 mul l(-1) H2S the sulfate uptake measured during a dark or light period was decreased to the same extent.”
Claim · model-written summary
0.4 mul l(-1) H2S reduced xylem loading by 42% after six days.
- Taxon
- Brassica oleracea L.Brassica oleraceat0
- Treatment
- 0.4 mul l(-1) H2Se0
- Outcome
- xylem loadinge0
- Direction
- decreasede0
- Value
- 42%e0
- Qualifier
- after 6 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both the xylem loading and the net sulfate uptake rate were decreased by 42% after 6 days of exposure to 0.4 mul l(-1) H2S.”
t0“Brassica oleracea L. was exposed to 0.4 mul l(-1) H2S”
Claim · model-written summary
0.4 mul l(-1) H2S reduced net sulfate uptake by 42% after six days.
- Taxon
- Brassica oleracea L.Brassica oleraceat0
- Treatment
- 0.4 mul l(-1) H2Se0
- Outcome
- net sulfate uptake ratee0
- Direction
- decreasede0
- Value
- 42%e0
- Qualifier
- after 6 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both the xylem loading and the net sulfate uptake rate were decreased by 42% after 6 days of exposure to 0.4 mul l(-1) H2S.”
t0“Brassica oleracea L. was exposed to 0.4 mul l(-1) H2S”
Claim · model-written summary
Xylem loading was inferred not to limit root sulfate uptake.
- Taxon
- Brassica oleracea L.Brassica oleraceat0
- Outcome
- uptake of sulfate by the rootse0
- Qualifier
- xylem loading was not the limiting factore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This suggested that the xylem loading was not the limiting factor in the uptake of sulfate by the roots.”
t0“Brassica oleracea L. was exposed to 0.4 mul l(-1) H2S”
Claim · model-written summary
H2S decreased insoluble fraction labeled sulfur specific radioactivity more than soluble fraction.
- Taxon
- Brassica oleracea L.Brassica oleraceat0
- Organ / stage
- shoot and rootse0
- Treatment
- H2Se1
- Outcome
- specific radioactivity of the labeled S of the insoluble fractione0
- Direction
- decreased moree0
- Comparator
- soluble fractione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the specific radioactivity of the labeled S of the insoluble fraction (mainly proteins) of the shoot and roots was decreased more than the specific radioactivity of the labeled S of the soluble fraction (mainly sulfate).”
t0“Brassica oleracea L. was exposed to 0.4 mul l(-1) H2S”
e1“When Brassica oleracea L. was exposed to 0.2 mul l(-1) H2S the sulfate uptake measured during a dark or light period was decreased to the same extent.”
Claim · model-written summary
Most metabolized atmospheric H2S was incorporated into proteins.
- Taxon
- Brassica oleracea L.Brassica oleraceat0
- Compound
- H2Se0
- Outcome
- incorporated into proteinse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This demonstrated that the major proportion of the metabolized atmospheric H2S was incorporated into proteins.”
t0“Brassica oleracea L. was exposed to 0.4 mul l(-1) H2S”
Claim · model-written summary
H2S induced sulfur partition changes were similar in roots and shoot.
- Taxon
- Brassica oleracea L.Brassica oleraceat0
- Organ / stage
- rootse0
- Outcome
- change in partitioning of the labeled sulfure0
- Direction
- similare0
- Comparator
- shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The change in partitioning of the labeled sulfur upon H2S exposure was similar in the roots compared to the shoot”
t0“Brassica oleracea L. was exposed to 0.4 mul l(-1) H2S”
Claim · model-written summary
Authors infer roots depend on the shoot for organic sulfur supply.
- Taxon
- Brassica oleracea L.Brassica oleraceat0
- Organ / stage
- rootse0
- Outcome
- organic sulfur supplye0
- Qualifier
- dependent on the shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which suggested that the roots were dependent on the shoot for their organic sulfur supply.”
t0“Brassica oleracea L. was exposed to 0.4 mul l(-1) H2S”
The same questions in other papers
hydrogen sulfide · nutrient: content · Brassica oleracea (wild cabbage)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- 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.