Abstract
Sulfur deficiency in plants has severe impacts on both growth and nutrient composition. Fumigation with sub-lethal concentrations of H2S facilitates the supply of reduced sulfur via the leaves while sulfate is depleted from the roots. This restores growth while sulfate levels in the plant tissue remain low. In the present study this system was used to reveal interactions of sulfur with other nutrients in the plant and to ascertain whether these changes are due to the absence or presence of sulfate or rather to changes in growth and organic sulfur. There was a complex reaction of the mineral composition to sulfur deficiency, however, the changes in content of many nutrients were prevented by H2S fumigation. Under sulfur deficiency these nutrients accumulated on a fresh weight basis but were diluted on a dry weight basis, presumably due to a higher dry matter content. The pattern differed, however, between leaves and roots which led to changes in shoot to root partitioning. Only the potassium, molybdenum and zinc contents were strongly linked to the sulfate supply. Potassium was the only nutrient amongst those measured which showed a positive correlation with sulfur content in shoots, highlighting a role as a counter cation for sulfate during xylem loading and vacuolar storage in leaves. This was supported by an accumulation of potassium in roots of the sulfur-deprived plants. Molybdenum and zinc increased substantially under sulfur deficiency, which was only partly prevented by H2S fumigation. While the causes of increased molybdenum under sulfur deficiency have been previously studied, the relation between sulfate and zinc uptake needs further clarification.
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Claims 10
Claim · model-written summary
Potassium was the only nutrient showing a positive correlation with sulfur content in Chinese cabbage shoots.
- Taxon
- Chinese cabbage
Brassica rapa subsp. pekinensist0 - Compound
- Potassiume1
- Outcome
- sulfur content in shootse1
- Direction
- positive correlatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e1“Potassium was the only nutrient amongst those measured which showed a positive correlation with sulfur content in shoots”
Claim · model-written summary
Molybdenum and zinc increased substantially under sulfur deficiency in Chinese cabbage.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- sulfur deficiencye2
- Outcome
- Molybdenum and zince2
- Direction
- increased substantiallye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e2“Molybdenum and zinc increased substantially under sulfur deficiency, which was only partly prevented by H2S fumigation”
Claim · model-written summary
H2S fumigation only partly prevented the sulfur-deficiency increase of molybdenum and zinc.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- H2S fumigatione2
- Outcome
- Molybdenum and zince2
- Direction
- only partly preventede2
- Comparator
- sulfur deficiencye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e2“Molybdenum and zinc increased substantially under sulfur deficiency, which was only partly prevented by H2S fumigation”
Claim · model-written summary
H2S fumigation prevented the changes in content of many nutrients caused by sulfur deficiency.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- H2S fumigatione3
- Outcome
- changes in content of many nutrientse3
- Direction
- preventede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e3“the changes in content of many nutrients were prevented by H2S fumigation”
Claim · model-written summary
Under sulfur deficiency, nutrients accumulated on a fresh weight basis in Chinese cabbage.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- sulfur deficiencye4
- Outcome
- these nutrientse4
- Direction
- accumulatede4
- Qualifier
- on a fresh weight basise4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e4“Under sulfur deficiency these nutrients accumulated on a fresh weight basis but were diluted on a dry weight basis, presumably due to a higher dry matter content”
Claim · model-written summary
Under sulfur deficiency, nutrients were diluted on a dry weight basis in Chinese cabbage, presumably due to higher dry matter content.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- sulfur deficiencye4
- Outcome
- these nutrientse4
- Direction
- dilutede4
- Qualifier
- on a dry weight basis, presumably due to a higher dry matter contente4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e4“Under sulfur deficiency these nutrients accumulated on a fresh weight basis but were diluted on a dry weight basis, presumably due to a higher dry matter content”
Claim · model-written summary
The pattern of nutrient response differed between leaves and roots, changing shoot to root partitioning in Chinese cabbage.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Organ / stage
- leaves and rootse5
- Outcome
- shoot to root partitioninge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e5“The pattern differed, however, between leaves and roots which led to changes in shoot to root partitioning”
Claim · model-written summary
Potassium may act as a counter cation for sulfate during xylem loading and vacuolar storage in leaves.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Outcome
- xylem loading and vacuolar storagee6
- Qualifier
- counter cation for sulfatee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e6“highlighting a role as a counter cation for sulfate during xylem loading and vacuolar storage in leaves”
Claim · model-written summary
Potassium accumulated in roots of sulfur-deprived Chinese cabbage plants.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Compound
- potassiume7
- Outcome
- accumulation of potassium in rootse7
- Qualifier
- sulfur-deprived plantse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e7“This was supported by an accumulation of potassium in roots of the sulfur-deprived plants”
Claim · model-written summary
Only potassium, molybdenum and zinc contents were strongly linked to sulfate supply in Chinese cabbage.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- sulfate supplye1
- Outcome
- potassium, molybdenum and zinc contentse1
- Direction
- strongly linkede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“H2S Fumigation of Chinese Cabbage”
e1“Only the potassium, molybdenum and zinc contents were strongly linked to the sulfate supply”
The same questions in other papers
sulfur atom · nutrient: content · Brassica rapa (field mustard)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- positive
- positive
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.