Abstract
Germination of lettuce and wheat in soil is reduced by a decrease in water potential, but a significant temperature‐water potential interaction exists for lettuce. At 35 C kinetin permits lettuce germination at 0 and —1.1 bars, and at 25 C and 15 C it enhances germination at lower water potentials, causing 30% germination at —8.0 bars. Wheat germinates well at —8.0 bars, but no germination occurs at —14.9 bars; temperature had little effect on wheat germination. Germination in soil and solute systems was compared to determine the usefulness of solute germination data for predicting germination in dry soil. Total germination of lettuce in polyethylene glycol‐6000 may approximate total germination in soil at the same water potential, but germination rates differ widely for the two systems. Kinetin‐treated lettuce seeds nearly completed germination in two days in polyethylene glycol solutions, but five days were required for similar germination percentages in the soil. Sucrose is not useful for simulating soil water stress; wheat seeds germinate at —14.9 bars in sucrose but fail to germinate in soil at the same potential, and germination is more rapid in sucrose than in the soil.
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Claims 14
Claim · model-written summary
Lower soil water potential reduced lettuce germination.
- Taxon
- lettuce
Lactuca sativae0 - Outcome
- Germinatione0
- Direction
- reducede0
- Qualifier
- decrease in water potentiale0
- Setting
- soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination of lettuce and wheat in soil is reduced by a decrease in water potential”
Claim · model-written summary
Lower soil water potential reduced wheat germination.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- Germinatione0
- Direction
- reducede0
- Qualifier
- decrease in water potentiale0
- Setting
- soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination of lettuce and wheat in soil is reduced by a decrease in water potential”
Claim · model-written summary
Lettuce had a significant temperature by water potential interaction for germination.
- Taxon
- lettuceLactuca sativae0
- Outcome
- temperature‐water potential interactione0
Not reportedSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant temperature‐water potential interaction exists for lettuce.”
Claim · model-written summary
At 35 C, kinetin permitted lettuce germination at 0 and —1.1 bars.
- Taxon
- lettuceLactuca sativae0
- Treatment
- kinetine0
- Outcome
- germinatione0
- Direction
- permitse0
- Value
- 0 and —1.1 barse0
- Qualifier
- At 35 Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 35 C kinetin permits lettuce germination at 0 and —1.1 bars”
Claim · model-written summary
At 25 C and 15 C, kinetin enhanced lettuce germination at low water potential, giving 30% at —8.0 bars.
- Taxon
- lettuceLactuca sativae0
- Treatment
- kinetine0
- Outcome
- germinatione0
- Direction
- enhancese0
- Value
- 30%e0
- Qualifier
- at —8.0 barse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 35 C kinetin permits lettuce germination at 0 and —1.1 bars, and at 25 C and 15 C it enhances germination at lower water potentials, causing 30% germination at —8.0 bars.”
Claim · model-written summary
Wheat germinated well at —8.0 bars.
- Taxon
- WheatTriticum aestivume0
- Outcome
- germinatese0
- Direction
- welle0
- Qualifier
- —8.0 barse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat germinates well at —8.0 bars”
Claim · model-written summary
Wheat did not germinate at —14.9 bars.
Not reportedTaxon
Verbatim
e0“no germination occurs at —14.9 bars”
Claim · model-written summary
Temperature had little effect on wheat germination.
- Taxon
- wheatTriticum aestivume0
- Outcome
- germinatione0
- Direction
- little effecte0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“temperature had little effect on wheat germination.”
Claim · model-written summary
At the same water potential, lettuce total germination in polyethylene glycol-6000 may approximate that in soil.
- Taxon
- lettuceLactuca sativae0
- Outcome
- Total germinatione0
- Qualifier
- may approximatee0
- Comparator
- soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total germination of lettuce in polyethylene glycol‐6000 may approximate total germination in soil at the same water potential”
Claim · model-written summary
Lettuce germination rates differed widely between polyethylene glycol-6000 and soil.
Not reportedTaxon
Verbatim
e0“germination rates differ widely for the two systems.”
Claim · model-written summary
Kinetin-treated lettuce seeds nearly completed germination in two days in polyethylene glycol solution.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Kinetin‐treatede0
- Outcome
- germinatione0
- Value
- two dayse0
- Setting
- polyethylene glycol solutionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kinetin‐treated lettuce seeds nearly completed germination in two days in polyethylene glycol solutions”
Claim · model-written summary
Comparable kinetin-treated lettuce germination took five days in soil.
Not reportedTaxon
Verbatim
e0“but five days were required for similar germination percentages in the soil.”
Claim · model-written summary
Sucrose did not usefully simulate soil water stress for wheat germination.
- Taxon
- wheatTriticum aestivume0
- Outcome
- simulating soil water stresse0
- Direction
- not usefule0
- Comparator
- soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose is not useful for simulating soil water stress; wheat seeds germinate at —14.9 bars in sucrose but fail to germinate in soil at the same potential”
Claim · model-written summary
Wheat seeds germinated more rapidly in sucrose than in soil.
Not reportedTaxon
Verbatim
e0“germination is more rapid in sucrose than in the soil.”
The same questions in other papers
kinetin · growth · Lactuca sativa (garden lettuce)Positive and negative results
20 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- negative
20 papers more in this group
See all 24 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.