Abstract
Abstract Temperature and daylength treatments have been used to investigate the apparent link between the potential for rapid leaf extension in spring and floral initiation and development in Lolium perenne (cv. Vigor). After growth at 5°C for 10 weeks (vernalization treatment) the leaves which developed at 15°C expanded significantly faster than non‐vernalized controls under both long and short days. Under long days floral development was initiated in vernalized plants but under short days it was not. Specific leaf area was higher in vernalized than non‐vernalized plants under long days. The photosynthetic capacity of leaves which developed on plants which had been previously vernalized and then grown at 15°C under long days was higher than non‐vernalized controls when expressed on a leaf area and dry weight basis, but not on the basis of chlorophyll content. Vernalization followed by short days resulted in a smaller and non‐significant increase in the photosynthetic capacity of leaves. Application of gibberellic acid (GA) as a spray to non‐vernalized plants did not affect floral development but did increase the rate of leaf extension. The application of GA did not affect specific leaf area or photosynthetic capacity expressed on an area basis.
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Claims 10
Claim · model-written summary
Vernalization significantly accelerated leaf expansion under long and short days.
- Taxon
- Lolium perenne
Lolium perennet0 - Treatment
- 5°C for 10 weeks (vernalization treatment)e0
- Outcome
- leaves which developed at 15°C expandede0
- Direction
- fastere0
- Qualifier
- under both long and short dayse0
- Comparator
- non‐vernalized controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After growth at 5°C for 10 weeks (vernalization treatment) the leaves which developed at 15°C expanded significantly faster than non‐vernalized controls under both long and short days.”
t0“perennial ryegrass (Lolium perenne L.)”
Claim · model-written summary
Floral development began in vernalized plants under long days.
- Taxon
- Lolium perenneLolium perennet0
- Outcome
- floral development was initiatede0
- Qualifier
- Under long dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under long days floral development was initiated in vernalized plants but under short days it was not.”
t0“perennial ryegrass (Lolium perenne L.)”
Claim · model-written summary
Floral development did not begin in vernalized plants under short days.
- Taxon
- Lolium perenneLolium perennet0
- Outcome
- under short days it was note0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under long days floral development was initiated in vernalized plants but under short days it was not.”
t0“perennial ryegrass (Lolium perenne L.)”
Claim · model-written summary
Specific leaf area was higher after vernalization under long days.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- vernalizede0
- Outcome
- Specific leaf areae0
- Direction
- highere0
- Qualifier
- under long dayse0
- Comparator
- non‐vernalized plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Specific leaf area was higher in vernalized than non‐vernalized plants under long days.”
t0“perennial ryegrass (Lolium perenne L.)”
Claim · model-written summary
Vernalization increased leaf photosynthetic capacity per area and dry weight under long days.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- previously vernalizede0
- Outcome
- photosynthetic capacitye0
- Direction
- highere0
- Qualifier
- on a leaf area and dry weight basise0
- Comparator
- non‐vernalized controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic capacity of leaves which developed on plants which had been previously vernalized and then grown at 15°C under long days was higher than non‐vernalized controls when expressed on a leaf area and dry weight basis, but not on the basis of chlorophyll content.”
t0“perennial ryegrass (Lolium perenne L.)”
Claim · model-written summary
Photosynthetic capacity per chlorophyll content was not higher after vernalization.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- previously vernalizede0
- Outcome
- photosynthetic capacitye0
- Qualifier
- not on the basis of chlorophyll contente0
- Comparator
- non‐vernalized controlse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic capacity of leaves which developed on plants which had been previously vernalized and then grown at 15°C under long days was higher than non‐vernalized controls when expressed on a leaf area and dry weight basis, but not on the basis of chlorophyll content.”
t0“perennial ryegrass (Lolium perenne L.)”
Claim · model-written summary
Vernalization followed by short days gave a smaller, nonsignificant photosynthetic capacity increase.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- Vernalization followed by short dayse0
- Outcome
- photosynthetic capacity of leavese0
- Direction
- increasee0
- Qualifier
- smaller and non‐significante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vernalization followed by short days resulted in a smaller and non‐significant increase in the photosynthetic capacity of leaves.”
t0“perennial ryegrass (Lolium perenne L.)”
Claim · model-written summary
GA spray did not affect floral development in nonvernalized plants.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- gibberellic acid (GA) as a spraye0
- Outcome
- floral developmente0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of gibberellic acid (GA) as a spray to non‐vernalized plants did not affect floral development but did increase the rate of leaf extension.”
t0“perennial ryegrass (Lolium perenne L.)”
Claim · model-written summary
GA spray increased leaf extension rate in nonvernalized plants.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- gibberellic acid (GA) as a spraye0
- Outcome
- rate of leaf extensione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of gibberellic acid (GA) as a spray to non‐vernalized plants did not affect floral development but did increase the rate of leaf extension.”
t0“perennial ryegrass (Lolium perenne L.)”
Claim · model-written summary
GA spray did not affect specific leaf area or area-based photosynthetic capacity.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- GAe0
- Outcome
- specific leaf area or photosynthetic capacity expressed on an area basise0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of GA did not affect specific leaf area or photosynthetic capacity expressed on an area basis.”
t0“perennial ryegrass (Lolium perenne L.)”
The same questions in other papers
Gibberellic acid · growth · Lolium perenne (perennial ryegrass)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
cold · physiology: photosynthesis · Lolium perenne (perennial ryegrass)Positive and negative results
2 in the opposite direction
- negative
- negative
light · physiology: photosynthesis · Lolium perenne (perennial ryegrass)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
application · growth · Lolium perenne (perennial ryegrass)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
1 paper more in this group
See all 5 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.