Abstract
The effect of exposure to sulphur dioxide (0 or 96 μg m−3 SO<inf>2</inf>) on the growth and sulphur content of lucerne (<it>Medicago sativa</it> L.) was examined in a period of 135 d during which the plants were harvested four times. The lucerne was grown in pots of soil with and without the addition of sulphate and of nitrate. Evidence of sulphur deficiency, including a reduction in the weight, the number and the sulphur content of shoots, was found in plants grown without added sulphate. Deficiency was alleviated through exposure of plants to SO<inf>2</inf>. Apart from reducing shoot weight at one harvest and generally increasimg the concentration of sulphur in the shoots, exposure to SO<inf>2</inf> had no significant effect on plants grown with added sulphate. The yield of shoots was greater, and was reduced to a lesser extent with sulphur deficiency, in plants grown with added nitrate than in those dependent on rhizobia. Whilst the transpiration coefficient increased greatly in sulphur-deficient plants, it was reduced where otherwise similarly treated plants were exposed to SO<inf>2</inf>; this treatment did not alter the coefficient in plants with an adequate supply of sulphur from the soil.
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Claims 9
Claim · model-written summary
SO2 exposure alleviated sulphur deficiency in lucerne grown without added sulphate.
- Taxon
- Lucerne
Medicago sativat0 - Treatment
- exposuree2
- Outcome
- sulphur deficiencye1
- Direction
- alleviatede2
- Comparator
- plants grown without added sulphatee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Lucerne (Medicago sativaL.) Exposed to Sulphur Dioxide”
e1“Evidence of sulphur deficiency, including a reduction in the weight, the number and the sulphur content of shoots, was found in plants grown without added sulphate”
e2“Deficiency was alleviated through exposure of plants to”
Claim · model-written summary
Sulphur deficiency without added sulphate reduced shoot weight, shoot number and shoot sulphur content in lucerne.
- Taxon
- LucerneMedicago sativat0
- Organ / stage
- shootse1
- Treatment
- without added sulphatee1
- Outcome
- weight, the number and the sulphur content of shootse1
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Lucerne (Medicago sativaL.) Exposed to Sulphur Dioxide”
e1“Evidence of sulphur deficiency, including a reduction in the weight, the number and the sulphur content of shoots, was found in plants grown without added sulphate”
Claim · model-written summary
SO2 exposure reduced shoot weight at one harvest in lucerne grown with added sulphate.
- Taxon
- LucerneMedicago sativat0
- Treatment
- exposuree2
- Outcome
- shoot weighte3
- Direction
- reducinge3
- Qualifier
- at one harveste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Lucerne (Medicago sativaL.) Exposed to Sulphur Dioxide”
e2“Deficiency was alleviated through exposure of plants to”
e3“Apart from reducing shoot weight at one harvest and generally increasimg the concentration of sulphur in the shoots”
e4“had no significant effect on plants grown with added sulphate”
Claim · model-written summary
SO2 exposure increased the sulphur concentration in lucerne shoots.
- Taxon
- LucerneMedicago sativat0
- Treatment
- exposuree2
- Outcome
- concentration of sulphur in the shootse3
- Direction
- increasimge3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Lucerne (Medicago sativaL.) Exposed to Sulphur Dioxide”
e2“Deficiency was alleviated through exposure of plants to”
e3“Apart from reducing shoot weight at one harvest and generally increasimg the concentration of sulphur in the shoots”
Claim · model-written summary
SO2 exposure had no significant effect on lucerne grown with added sulphate.
- Taxon
- LucerneMedicago sativat0
- Treatment
- exposuree2
- Outcome
- effecte4
- Direction
- had no significant effecte4
- Qualifier
- grown with added sulphatee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Lucerne (Medicago sativaL.) Exposed to Sulphur Dioxide”
e2“Deficiency was alleviated through exposure of plants to”
e4“had no significant effect on plants grown with added sulphate”
Claim · model-written summary
Lucerne grown with added nitrate had greater shoot yield than plants dependent on rhizobia, and the yield was reduced less by sulphur deficiency.
- Taxon
- LucerneMedicago sativat0
- Treatment
- added nitratee5
- Outcome
- yield of shootse5
- Direction
- greatere5
- Qualifier
- reduced to a lesser extent with sulphur deficiencye5
- Comparator
- those dependent on rhizobiae5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Lucerne (Medicago sativaL.) Exposed to Sulphur Dioxide”
e5“The yield of shoots was greater, and was reduced to a lesser extent with sulphur deficiency, in plants grown with added nitrate than in those dependent on rhizobia”
Claim · model-written summary
Sulphur-deficient lucerne plants showed a greatly increased transpiration coefficient.
- Taxon
- LucerneMedicago sativat0
- Treatment
- sulphur-deficiente6
- Outcome
- transpiration coefficiente6
- Direction
- increased greatlye6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Lucerne (Medicago sativaL.) Exposed to Sulphur Dioxide”
e6“Whilst the transpiration coefficient increased greatly in sulphur-deficient plants, it was reduced where otherwise similarly treated plants were exposed to”
Claim · model-written summary
SO2 exposure reduced the transpiration coefficient in sulphur-deficient lucerne.
- Taxon
- LucerneMedicago sativat0
- Treatment
- exposed toe6
- Outcome
- transpiration coefficiente6
- Direction
- reducede6
- Comparator
- otherwise similarly treated plantse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Lucerne (Medicago sativaL.) Exposed to Sulphur Dioxide”
e6“Whilst the transpiration coefficient increased greatly in sulphur-deficient plants, it was reduced where otherwise similarly treated plants were exposed to”
Claim · model-written summary
SO2 exposure did not alter the transpiration coefficient of lucerne with adequate sulphur supply.
- Taxon
- LucerneMedicago sativat0
- Treatment
- this treatmente7
- Outcome
- coefficiente7
- Direction
- did not altere7
- Comparator
- plants with an adequate supply of sulphur from the soile7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Lucerne (Medicago sativaL.) Exposed to Sulphur Dioxide”
e7“this treatment did not alter the coefficient in plants with an adequate supply of sulphur from the soil”
The same questions in other papers
nitrogen · yield · Medicago sativa (alfalfa)Results differ
32 papers in the same direction as this paper · 11 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
41 papers more in this group
See all 45 papers →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.