Abstract
‘Newport’ Kentucky bluegrass ( Poa pratensis L.) was subjected to temperatures of 21, 27, 32, 38, and 43C for time intervals of 1 to 6 days during anthesis. Effects of these treatments were measured by seed weight per head, weight of 100 seed, viability of pollen, percent of rioters setting seed, and seed germination. Increases in temperature above 27C during anthesis resulted in reduction for all measurements except seed germination. The decline was gradual as temperature increased, becoming significantly lower at 32C for most measurements and at 38 and 43C for all measurements. Increasing the length of exposure to high temperature during anthesis also resulted in a gradual decline in all measurements except seed germination. Differences were usually significant after 2 to 3 days of exposure to high temperature. Germination of seed produced was not significantly affected by high temperature or length of exposure to high temperature during anthesis.
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Claims 6
Claim · model-written summary
Above 27C, heat reduced seed weight per head, 100-seed weight and pollen viability.
- Taxon
- Poa pratensis L.
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Poa pratensist0 - Treatment
- temperature above 27Ce0
- Outcome
- seed weight per head, weight of 100 seed, viability of pollene0
- Direction
- reductione0
- Qualifier
- during anthesise0
- Comparator
- 27Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Effects of these treatments were measured by seed weight per head, weight of 100 seed, viability of pollen, percent of rioters setting seed, and seed germination. Increases in temperature above 27C during anthesis resulted in reduction for all measurements except seed germination.”
t0“Poa pratensis L.”
Claim · model-written summary
Above 27C, heat reduced the percent setting seed.
- Taxon
- Poa pratensis L.Poa pratensist0
- Treatment
- temperature above 27Ce0
- Outcome
- percent of rioters setting seede0
- Direction
- reductione0
- Comparator
- 27Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of these treatments were measured by seed weight per head, weight of 100 seed, viability of pollen, percent of rioters setting seed, and seed germination. Increases in temperature above 27C during anthesis resulted in reduction for all measurements except seed germination.”
t0“Poa pratensis L.”
Claim · model-written summary
Heat effects became significant at 32C for most measures and at 38 and 43C for all.
- Taxon
- Poa pratensis L.Poa pratensist0
- Outcome
- most measurementse0
- Direction
- lowere0
- Value
- 32Ce0
- Qualifier
- at 38 and 43C for all measurementse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decline was gradual as temperature increased, becoming significantly lower at 32C for most measurements and at 38 and 43C for all measurements.”
t0“Poa pratensis L.”
Claim · model-written summary
Longer heat exposure reduced all measured outcomes except germination.
- Taxon
- Poa pratensis L.Poa pratensist0
- Treatment
- Increasing the length of exposure to high temperaturee0
- Outcome
- all measurements except seed germinatione0
- Direction
- gradual declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the length of exposure to high temperature during anthesis also resulted in a gradual decline in all measurements except seed germination.”
t0“Poa pratensis L.”
Claim · model-written summary
Heat-duration differences were usually significant after 2 to 3 days.
- Taxon
- Poa pratensis L.Poa pratensist0
- Outcome
- Differencese0
- Value
- 2 to 3 dayse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences were usually significant after 2 to 3 days of exposure to high temperature.”
t0“Poa pratensis L.”
Claim · model-written summary
Seed germination was not significantly affected by heat intensity or exposure length.
- Taxon
- Poa pratensis L.Poa pratensist0
- Treatment
- high temperature or length of exposure to high temperaturee0
- Outcome
- Germination of seed producede0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination of seed produced was not significantly affected by high temperature or length of exposure to high temperature during anthesis.”
t0“Poa pratensis L.”
The same questions in other papers
heat · growth · Poa pratensis (Kentucky bluegrass)Results agree
1 paper in the same direction as this paper
- negative
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.