Abstract
The area of a fully-grown leaf lamina varied according to its position on the stem, and the temperature, light intensity, and photoperiod under which the plant was grown.In continuous illumination, raising the temperature by 5° intervals between 10 and 25 °C, resulted in progressively higher rates of leaf initiation, emergence, and expansion. The length of the lamina increased with each increase in temperature, but the breadth and thickness decreased. The greatest area of individual leaves was formed at 20 °C. Each increase in light intensity over the range 200, 500, 1000, 1750, and 2500 ft-c resulted in higher rates of leaf initiation, emergence, and expansion, and increases in breadth and thickness, but a decrease in length. The greatest area was formed at 1000–1750 ft-c.An increase in daylength from 8 to 24 hours increased leaf length, breadth, and area. This was a photoperiodic effect, unlike the increase in thickness with increased daylength, which was related to the total light energy received.Changes in leaf shape under different environmental conditions were not directly related to changes in leaf dry weight. A control of leaf growth by hormonal mechanisms sensitive to photoperiod seems more probable than does control by internal competition for assimilates among developing leaves.
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Claims 13
Claim · model-written summary
Lamina area varied with stem position and growth environment.
- Taxon
- WHEAT
Triticum aestivumt0 - Material
- MARQUISt0
- Organ / stage
- leaf laminae0
- Outcome
- area of a fully-grown leaf laminae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The area of a fully-grown leaf lamina varied according to its position on the stem, and the temperature, light intensity, and photoperiod under which the plant was grown”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Increasing temperature from 10 to 25 °C raised leaf initiation, emergence and expansion rates.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- raising the temperature by 5° intervals between 10 and 25 °Ce0
- Outcome
- rates of leaf initiation, emergence, and expansione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“raising the temperature by 5° intervals between 10 and 25 °C, resulted in progressively higher rates of leaf initiation, emergence, and expansion”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Leaf lamina length increased with temperature.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- increase in temperaturee0
- Outcome
- length of the laminae0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The length of the lamina increased with each increase in temperature”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Leaf breadth and thickness decreased with temperature.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- temperaturet1
- Outcome
- breadth and thicknesse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but the breadth and thickness decreased”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
t1“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Individual leaf area was greatest at 20 °C.
- Taxon
- WHEATTriticum aestivumt0
- Outcome
- area of individual leavese0
- Direction
- greateste0
- Value
- 20 °Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greatest area of individual leaves was formed at 20 °C”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Increasing light intensity raised leaf initiation, emergence and expansion rates.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- increase in light intensitye0
- Outcome
- rates of leaf initiation, emergence, and expansione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each increase in light intensity over the range 200, 500, 1000, 1750, and 2500 ft-c resulted in higher rates of leaf initiation, emergence, and expansion”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Increasing light intensity increased leaf breadth and thickness.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- light intensityt1
- Outcome
- breadth and thicknesse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increases in breadth and thickness, but a decrease in length”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
t1“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Increasing light intensity decreased leaf length.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- light intensityt1
- Outcome
- lengthe0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increases in breadth and thickness, but a decrease in length”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
t1“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Leaf area was greatest at 1000–1750 ft-c.
- Taxon
- WHEATTriticum aestivumt0
- Outcome
- areae0
- Direction
- greateste0
- Value
- 1000–1750 ft-ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greatest area was formed at 1000–1750 ft-c”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Longer daylength increased leaf length, breadth and area.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- increase in daylength from 8 to 24 hourse0
- Outcome
- leaf length, breadth, and areae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increase in daylength from 8 to 24 hours increased leaf length, breadth, and area”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Longer daylength increased leaf thickness through total light energy received.
- Taxon
- WHEATTriticum aestivumt0
- Outcome
- increase in thicknesse0
- Qualifier
- total light energy receivede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in thickness with increased daylength, which was related to the total light energy received”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Leaf shape changes were not directly related to dry weight changes.
- Taxon
- WHEATTriticum aestivumt0
- Organ / stage
- leafe0
- Outcome
- Changes in leaf shapee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in leaf shape under different environmental conditions were not directly related to changes in leaf dry weight”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
Claim · model-written summary
Photoperiod-sensitive hormonal control of leaf growth was considered more probable than assimilate competition.
- Taxon
- WHEATTriticum aestivumt0
- Outcome
- leaf growthe0
- Qualifier
- hormonal mechanisms sensitive to photoperiode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A control of leaf growth by hormonal mechanisms sensitive to photoperiod seems more probable than does control by internal competition for assimilates among developing leaves”
t0“LEAF GROWTH IN MARQUIS WHEAT, AS REGULATED BY TEMPERATURE, LIGHT INTENSITY, AND DAYLENGTH”
The same questions in other papers
light · growth · Triticum aestivum (wheat)Positive and negative results
45 papers in the same direction as this paper · 36 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- no effect
- positive
81 papers more in this group
See all 85 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.