Abstract
Summary Flowering responses of three clones of Dactylis glomerata L. to different daylength and temperature combinations and sequences were studied. These showed that: Induction was brought about by natural short days (10h 10m, to 12h 30m) at all temperatures tested, but was more effective at day/night temperatures of 11.0/15.5°c than at 10.5/7.5°c or 18/15.5°c. Lower temperatures, averaging about 7.5/4°c, during short days, prevented later flowering altogether in one clone. 18‐hr days did not lead to induction. Competence attained during induction at 10.5/7.5°c was lost in short days at temperatures of 18/15.5°c even though such conditions also led to competence. Cool short days (10.5/7.5°c) led to both induction and strong initiation. Panicle initiation occurred in long days at both 10.5/7.5 and 18/15.5°c, but more prolifically at the former temperature. To explain these results an hypothesis is proposed that the development from the vegetative to the reproductive state involves a gradual progression from induction to initiation rather than two distinct stages. On this basis, warm long days destroy the early stages of induction and warm short days the later stages of induction.
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Claims 7
Claim · model-written summary
Natural short days induced flowering at all tested temperatures.
- Taxon
- Dactylis glomerata L.
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Dactylis glomeratat0 - Treatment
- natural short days (10h 10m, to 12h 30m)e0
- Outcome
- Inductione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Induction was brought about by natural short days (10h 10m, to 12h 30m) at all temperatures tested”
t0“Dactylis glomerata L.”
Claim · model-written summary
Short-day induction was more effective at 11.0/15.5°c than at 10.5/7.5°c or 18/15.5°c.
- Taxon
- Dactylis glomerata L.Dactylis glomeratat0
- Treatment
- 11.0/15.5°ce0
- Outcome
- Inductione1
- Direction
- more effectivee0
- Comparator
- 10.5/7.5°c or 18/15.5°ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more effective at day/night temperatures of 11.0/15.5°c than at 10.5/7.5°c or 18/15.5°c”
t0“Dactylis glomerata L.”
e1“Induction was brought about by natural short days (10h 10m, to 12h 30m) at all temperatures tested”
Claim · model-written summary
Low temperatures during short days prevented flowering in one clone.
- Taxon
- Dactylis glomerata L.Dactylis glomeratat0
- Material
- one clonee0
- Treatment
- Lower temperatures, averaging about 7.5/4°c, during short dayse0
- Outcome
- later floweringe0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower temperatures, averaging about 7.5/4°c, during short days, prevented later flowering altogether in one clone”
t0“Dactylis glomerata L.”
Claim · model-written summary
Eighteen-hour days did not induce flowering.
- Taxon
- Dactylis glomerata L.Dactylis glomeratat0
- Treatment
- 18‐hr dayse0
- Outcome
- inductione0
- Direction
- did not lead toe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“18‐hr days did not lead to induction”
t0“Dactylis glomerata L.”
Claim · model-written summary
Short days at 18/15.5°c erased competence previously acquired at 10.5/7.5°c.
- Taxon
- Dactylis glomerata L.Dactylis glomeratat0
- Treatment
- short days at temperatures of 18/15.5°ce0
- Outcome
- Competencee0
- Direction
- loste0
- Comparator
- 10.5/7.5°ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Competence attained during induction at 10.5/7.5°c was lost in short days at temperatures of 18/15.5°c”
t0“Dactylis glomerata L.”
Claim · model-written summary
Cool short days produced induction and strong initiation.
- Taxon
- Dactylis glomerata L.Dactylis glomeratat0
- Treatment
- Cool short days (10.5/7.5°c)e0
- Outcome
- induction and strong initiatione0
- Direction
- stronge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cool short days (10.5/7.5°c) led to both induction and strong initiation”
t0“Dactylis glomerata L.”
Claim · model-written summary
Long days permitted panicle initiation at both tested temperatures, more profusely at 10.5/7.5°c.
- Taxon
- Dactylis glomerata L.Dactylis glomeratat0
- Treatment
- long days at both 10.5/7.5 and 18/15.5°ce0
- Outcome
- Panicle initiatione0
- Direction
- more prolificallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Panicle initiation occurred in long days at both 10.5/7.5 and 18/15.5°c, but more prolifically at the former temperature”
t0“Dactylis glomerata L.”
The same questions in other papers
light · phenology · Dactylis glomerata (cocksfoot)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
light · yield · Dactylis glomerata (cocksfoot)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
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.