Abstract
Wheat plants (Triticum aestivum L.) were grown at the same photosynthetic photon flux (PPF), 200 micromoles per square meter per second, but with phytochrome photoequilibrium (phi) values of 0.81, 0.55, and 0.33. Plants grown at phi values of 0.55 and 0.33 tillered 43 and 56%, less compared with plants grown at phi of 0.81. Main culm development (Haun stage) was slightly more advanced at lower values of phi, and leaf sheaths, but not leaf lamina, were longer at lower phi. Dry-mass accumulation was not affected by different levels of phi. Three levels of PPF (100, 200, and 400 micromoles per square meter per second) and two lamp types, metal halide and high pressure sodium, were also tested. Higher levels of PPF resulted in more dry mass, more tillering, and a more advanced Haun stage. There was no difference in plant dry mass or development under metal halide versus high pressure sodium lamps, except for total leaf length, which was greater under high pressure sodium lamps (49.5 versus 44.9 centimeters, P < 0.01).
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Claims 9
Claim · model-written summary
At phi 0.55, wheat tillering was 43% lower than at phi 0.81.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- phi values of 0.55e0
- Outcome
- tillerede0
- Direction
- lesse0
- Value
- 43e0
- Comparator
- phi of 0.81e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown at phi values of 0.55 and 0.33 tillered 43 and 56%, less compared with plants grown at phi of 0.81”
t0“Wheat”
Claim · model-written summary
At phi 0.33, wheat tillering was 56% lower than at phi 0.81.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- phi values of 0.55 and 0.33e0
- Outcome
- tillerede0
- Direction
- lesse0
- Value
- 56%e0
- Comparator
- phi of 0.81e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown at phi values of 0.55 and 0.33 tillered 43 and 56%, less compared with plants grown at phi of 0.81”
t0“Wheat”
Claim · model-written summary
Wheat main culm development was slightly more advanced at lower phi.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- lower values of phie0
- Outcome
- Main culm development (Haun stage)e0
- Direction
- more advancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Main culm development (Haun stage) was slightly more advanced at lower values of phi”
t0“Wheat”
Claim · model-written summary
Wheat leaf sheaths were longer at lower phi.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- lower phie0
- Outcome
- leaf sheathse0
- Direction
- longere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf sheaths, but not leaf lamina, were longer at lower phi”
t0“Wheat”
Claim · model-written summary
Wheat leaf lamina length did not increase at lower phi.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- lower phie0
- Outcome
- leaf laminae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf sheaths, but not leaf lamina, were longer at lower phi”
t0“Wheat”
Claim · model-written summary
Wheat dry-mass accumulation was unaffected by phi level.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- different levels of phie0
- Outcome
- Dry-mass accumulatione0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry-mass accumulation was not affected by different levels of phi”
t0“Wheat”
Claim · model-written summary
Higher photon flux produced more wheat dry mass and tillering and advanced Haun stage.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Higher levels of PPFe0
- Outcome
- dry mass, more tillering, and a more advanced Haun stagee0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher levels of PPF resulted in more dry mass, more tillering, and a more advanced Haun stage”
t0“Wheat”
Claim · model-written summary
Metal halide and high pressure sodium lamps yielded no difference in wheat dry mass or development.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- metal halidee0
- Outcome
- plant dry mass or developmente0
- Direction
- no differencee0
- Comparator
- high pressure sodium lampse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no difference in plant dry mass or development under metal halide versus high pressure sodium lamps”
t0“Wheat”
Claim · model-written summary
Total wheat leaf length was greater under high pressure sodium than metal halide lamps (49.5 versus 44.9 centimeters).
- Taxon
- WheatTriticum aestivumt0
- Treatment
- high pressure sodium lampse0
- Outcome
- total leaf lengthe0
- Direction
- greatere0
- Value
- 49.5 versus 44.9 centimeterse0
- Comparator
- metal halidee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total leaf length, which was greater under high pressure sodium lamps (49.5 versus 44.9 centimeters, P < 0.01)”
e1“There was no difference in plant dry mass or development under metal halide versus high pressure sodium lamps”
t0“Wheat”
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
- positive
- positive
- no effect
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.