Abstract
Osmotic concentration and pH may inhibit the seed germination and radicle growth of lettuce. At 25 milliosmols, an aqueous solution of Hoagland, sodium chloride, and sucrose exhibits over 50% inhibition on the radicle growth of lettuce. However, mannitol solution reveals 50% inhibition only at concentration above 125 milliosmols. The pH range of from 4 to 8 has only slight significant effect on the radicle growth of lettuce. Interaction between pH and osmotic effects is not evident. Compared with aqueous plant extracts, the nutrient solutions give less inhibition. The results of this study can be use as an indication of a solution of which the cause of inhibition is due to one or both of the aforementioned effects, or due to a phytotoxic effect.
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Claims 6
Claim · model-written summary
A Hoagland, sodium chloride and sucrose solution at 25 milliosmols inhibited lettuce radicle growth by over 50%.
- Taxon
- lettuce
Lactuca sativae1 - Treatment
- an aqueous solution of Hoagland, sodium chloride, and sucrosee1
- Outcome
- radicle growthe1
- Direction
- inhibitione1
- Value
- over 50%e1
- Qualifier
- At 25 milliosmolse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“At 25 milliosmols, an aqueous solution of Hoagland, sodium chloride, and sucrose exhibits over 50% inhibition on the radicle growth of lettuce”
Claim · model-written summary
Mannitol solution inhibited lettuce radicle growth by 50% only at concentrations above 125 milliosmols.
- Taxon
- lettuceLactuca sativae1
- Treatment
- mannitol solutione2
- Outcome
- radicle growthe1
- Direction
- inhibitione2
- Value
- 50%e2
- Qualifier
- only at concentration above 125 milliosmolse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“may inhibit the seed germination and radicle growth of lettuce”
e2“However, mannitol solution reveals 50% inhibition only at concentration above 125 milliosmols”
Claim · model-written summary
A pH range of 4 to 8 had only a slight significant effect on lettuce radicle growth.
- Taxon
- lettuceLactuca sativae1
- Treatment
- pH range of from 4 to 8e1
- Outcome
- radicle growthe1
- Qualifier
- only slighte1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The pH range of from 4 to 8 has only slight significant effect on the radicle growth of lettuce”
Claim · model-written summary
No interaction between pH and osmotic effects was evident.
- Taxon
- lettuceLactuca sativae1
- Outcome
- Interaction between pH and osmotic effectse2
- Qualifier
- not evidente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“may inhibit the seed germination and radicle growth of lettuce”
e2“Interaction between pH and osmotic effects is not evident”
Claim · model-written summary
Nutrient solutions gave less inhibition than aqueous plant extracts in lettuce.
- Taxon
- lettuceLactuca sativae1
- Treatment
- nutrient solutionse3
- Outcome
- inhibitione3
- Direction
- lesse3
- Comparator
- aqueous plant extractse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“may inhibit the seed germination and radicle growth of lettuce”
e3“Compared with aqueous plant extracts, the nutrient solutions give less inhibition”
Claim · model-written summary
The test-solution results can indicate whether inhibition is due to osmotic or pH effects or to a phytotoxic effect.
- Taxon
- lettuceLactuca sativae1
- Outcome
- cause of inhibitione4
- Comparator
- a phytotoxic effecte4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: use statement: the comparator is the alternative cause, not a measured comparison
Verbatim
e1“may inhibit the seed germination and radicle growth of lettuce”
e4“The results of this study can be use as an indication of a solution of which the cause of inhibition is due to one or both of the aforementioned effects, or due to a phytotoxic effect”
The same questions in other papers
mannitol · growth · Lactuca sativa (garden lettuce)Positive and negative results
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- positive
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See all 5 papers →sucrose · growth · Lactuca sativa (garden lettuce)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- positive
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See all 7 papers →fertilization · disease · Lactuca sativa (garden lettuce)Positive and negative results
5 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- negative
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See all 10 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.