Abstract
Abstract Lettuce seed (Lactuca sativa L. cv. Grand Rapids) prevented from attaining maximum water content are still able to respond to irradiation if the seed moisture content is above 6%. When the limitation to water uptake is by immersion in a solution of either polyethylene glycol 400 (PEG 400), mannitol, or sucrose, the responsiveness of the seed is lessened. With PEG 400 the molarity which reduces germination by about 50% is 0.03 while mannitol and sucrose must be present at 0.07 M and 0.05 M respectively to bring about the same reduction. While red light overcomes any additional effect 0.1 M mannitol and 0.025 M PEG 400 have on lettuce seed at 30°C (at which temperature the sample was positively photoblastic), irradiation did not overcome the effect of 0.1 M sucrose. Gibberellic acid did not have any effect on any of the treated seed. The solutes used cannot be considered as inert. Some chemical activity is associated with them and it is unwise to consider using these molecules to establish a particular level of water potential in the liquid bathing the seed.
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Claims 11
Claim · model-written summary
Lettuce seeds still responded to light when moisture exceeded 6%.
- Taxon
- Lactuca sativa L.
Lactuca sativae0 - Material
- Grand Rapidse0
- Outcome
- respond to irradiatione0
- Value
- 6%e0
- Qualifier
- seed moisture content is above 6%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce seed (Lactuca sativa L. cv. Grand Rapids) prevented from attaining maximum water content are still able to respond to irradiation if the seed moisture content is above 6%”
Claim · model-written summary
PEG 400 immersion lessened seed responsiveness to irradiation.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- polyethylene glycol 400 (PEG 400)e0
- Outcome
- responsiveness of the seede0
- Direction
- lessenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“immersion in a solution of either polyethylene glycol 400 (PEG 400), mannitol, or sucrose, the responsiveness of the seed is lessened”
t0“Water Content and the Responsivity of Lettuce Seeds to Light”
e1“Lettuce seed (Lactuca sativa L. cv. Grand Rapids)”
Claim · model-written summary
Mannitol immersion lessened seed responsiveness to irradiation.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- mannitole0
- Outcome
- responsiveness of the seede0
- Direction
- lessenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“immersion in a solution of either polyethylene glycol 400 (PEG 400), mannitol, or sucrose, the responsiveness of the seed is lessened”
t0“Water Content and the Responsivity of Lettuce Seeds to Light”
e1“Lettuce seed (Lactuca sativa L. cv. Grand Rapids)”
Claim · model-written summary
Sucrose immersion lessened seed responsiveness to irradiation.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- sucrosee0
- Outcome
- responsiveness of the seede0
- Direction
- lessenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“immersion in a solution of either polyethylene glycol 400 (PEG 400), mannitol, or sucrose, the responsiveness of the seed is lessened”
t0“Water Content and the Responsivity of Lettuce Seeds to Light”
e1“Lettuce seed (Lactuca sativa L. cv. Grand Rapids)”
Claim · model-written summary
PEG 400 at 0.03 molarity reduced germination by about 50%.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- PEG 400e0
- Outcome
- germinatione0
- Direction
- reducese0
- Value
- about 50%e0
- Qualifier
- 0.03e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With PEG 400 the molarity which reduces germination by about 50% is 0.03”
t0“Water Content and the Responsivity of Lettuce Seeds to Light”
e1“Lettuce seed (Lactuca sativa L. cv. Grand Rapids)”
Claim · model-written summary
Mannitol at 0.07 M brought about about 50% reduction in germination.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- mannitole0
- Outcome
- germinatione0
- Direction
- reductione0
- Value
- 0.07 Me0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With PEG 400 the molarity which reduces germination by about 50% is 0.03 while mannitol and sucrose must be present at 0.07 M and 0.05 M respectively to bring about the same reduction”
t0“Water Content and the Responsivity of Lettuce Seeds to Light”
e1“Lettuce seed (Lactuca sativa L. cv. Grand Rapids)”
Claim · model-written summary
Sucrose at 0.05 M brought about about 50% reduction in germination.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- sucrosee0
- Outcome
- germinatione0
- Direction
- reductione0
- Value
- 0.05 Me0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With PEG 400 the molarity which reduces germination by about 50% is 0.03 while mannitol and sucrose must be present at 0.07 M and 0.05 M respectively to bring about the same reduction”
t0“Water Content and the Responsivity of Lettuce Seeds to Light”
e1“Lettuce seed (Lactuca sativa L. cv. Grand Rapids)”
Claim · model-written summary
Red light overcame the additional germination effect of 0.1 M mannitol at 30°C.
- Taxon
- lettuce seedLactuca sativae0
- Treatment
- red lighte0
- Outcome
- additional effecte0
- Direction
- overcomese0
- Qualifier
- 30°Ce0
- Comparator
- 0.1 M mannitole0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“red light overcomes any additional effect 0.1 M mannitol and 0.025 M PEG 400 have on lettuce seed at 30°C”
Claim · model-written summary
Red light overcame the additional effect of 0.025 M PEG 400 at 30°C.
- Taxon
- lettuce seedLactuca sativae0
- Treatment
- red lighte0
- Outcome
- additional effecte0
- Direction
- overcomese0
- Qualifier
- 30°Ce0
- Comparator
- 0.025 M PEG 400e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“red light overcomes any additional effect 0.1 M mannitol and 0.025 M PEG 400 have on lettuce seed at 30°C”
Claim · model-written summary
Red light did not overcome the effect of 0.1 M sucrose.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- irradiatione0
- Outcome
- effecte0
- Direction
- did not overcomee0
- Comparator
- 0.1 M sucrosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irradiation did not overcome the effect of 0.1 M sucrose”
t0“Water Content and the Responsivity of Lettuce Seeds to Light”
e1“Lettuce seed (Lactuca sativa L. cv. Grand Rapids)”
Claim · model-written summary
Gibberellic acid had no effect on treated lettuce seeds.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- Gibberellic acide0
- Outcome
- treated seede0
- Direction
- did not have any effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellic acid did not have any effect on any of the treated seed”
t0“Water Content and the Responsivity of Lettuce Seeds to Light”
e1“Lettuce seed (Lactuca sativa L. cv. Grand Rapids)”
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See all 19 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.