Paper · 1926 · Botanical Gazette

Microchemical and Morphological Studies of Effect of Light on Plants

Norma E. Pfeiffer

19
claims
25
verbatim quotes
46
citations
2
research areas
—
Not open access

Abstract

1. In plants with short exposures to light, there are usually low carbohydrate and low protein reserves with less total growth and less production of differentiated tissues than in longer intervals. 2. In plants with longer light duration, there is increase in carbohydrate reserves without proportionately increased use in elaboration of proteins and tissue production. 3. Nitrates are present in great amounts in all tomato plants except the control and gantry crane house specimens. They are low in amount in buckwheat in 17, 19, and 24-hour exposures. They are usually lowest in the gantry crane house with extra carbon dioxide. 4. The maximum development of the plant (considering height and differentiated tissue) occurs in the 12-hour tomato and the 17-hour buckwheat. 5. Injury is evident in the tomato in exposures of 17 hours or more, resulting in marked decrease in photosynthetic ability. 6. Continuous light tends to produce thinner leaves, with palisade layer shorter or lacking. 7. The effect of conditions in the gantry crane houses as regards leaf thickness is variable. 8. Thinner leaves usually show an increase in the number of stomata, except in continuous light in intensity used. 9. Root development in fibrous systems appears roughly comparable with that of the aerial parts. 10. In the storage roots of four o'clock, maximum development occurs in the gantry crane houses and continuous light, while maximum height of stem occurs in the 17-hour plant.

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Claims 19

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Short light exposures give low carbohydrate and low protein reserves compared with longer intervals in plants.

Taxon
plantsViridiplantaee0
Treatment
short exposures to lighte0
Outcome
low carbohydrate and low protein reservese0
Direction
lowe0
Comparator
longer intervalse0

Verbatim

e0

“In plants with short exposures to light, there are usually low carbohydrate and low protein reserves with less total growth and less production of differentiated tissues than in longer intervals”

✓ located verbatim in the source · abstract, characters 3–197 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Short light exposures give less total growth than longer intervals in plants.

Taxon
plantsViridiplantaee0
Treatment
short exposures to lighte0
Outcome
less total growthe0
Direction
lesse0
Comparator
longer intervalse0

Verbatim

e0

“In plants with short exposures to light, there are usually low carbohydrate and low protein reserves with less total growth and less production of differentiated tissues than in longer intervals”

✓ located verbatim in the source · abstract, characters 3–197 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Short light exposures give less production of differentiated tissues than longer intervals in plants.

Taxon
plantsViridiplantaee0
Treatment
short exposures to lighte0
Outcome
less production of differentiated tissuese0
Direction
lesse0
Comparator
longer intervalse0

Verbatim

e0

“In plants with short exposures to light, there are usually low carbohydrate and low protein reserves with less total growth and less production of differentiated tissues than in longer intervals”

✓ located verbatim in the source · abstract, characters 3–197 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Longer light duration is associated with an increase in carbohydrate reserves in plants.

Taxon
plantsViridiplantaee1
Treatment
longer light duratione1
Outcome
carbohydrate reservese1
Direction
increasee1

Verbatim

e1

“In plants with longer light duration, there is increase in carbohydrate reserves without proportionately increased use in elaboration of proteins and tissue production”

✓ located verbatim in the source · abstract, characters 202–369 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Longer light duration is associated with use of carbohydrate for protein elaboration and tissue production that is not proportionately increased in plants.

Taxon
plantsViridiplantaee1
Treatment
longer light duratione1
Outcome
use in elaboration of proteins and tissue productione1
Direction
without proportionately increasede1

Verbatim

e1

“In plants with longer light duration, there is increase in carbohydrate reserves without proportionately increased use in elaboration of proteins and tissue production”

✓ located verbatim in the source · abstract, characters 202–369 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Nitrates were present in great amounts in tomato plants except the control and gantry crane house specimens.

Outcome
Nitratese2
Qualifier
except the control and gantry crane house specimense2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e2

“Nitrates are present in great amounts in all tomato plants except the control and gantry crane house specimens. They are low in amount in buckwheat in 17, 19, and 24-hour exposures. They are usually lowest in the gantry crane house with extra carbon dioxide”

✓ located verbatim in the source · abstract, characters 374–631 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Nitrates were low in buckwheat under 17, 19 and 24-hour light exposures.

Taxon
buckwheate2
Treatment
17, 19, and 24-hour exposurese2
Outcome
Nitratese2
Direction
lowe2

Verbatim

e2

“Nitrates are present in great amounts in all tomato plants except the control and gantry crane house specimens. They are low in amount in buckwheat in 17, 19, and 24-hour exposures. They are usually lowest in the gantry crane house with extra carbon dioxide”

✓ located verbatim in the source · abstract, characters 374–631 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Nitrates were usually lowest in the gantry crane house with extra carbon dioxide.

Taxon
PlantsViridiplantaet0
Treatment
extra carbon dioxidee2
Outcome
Nitratese2
Direction
loweste2
Setting
gantry crane housee2

Verbatim

t0

“Microchemical and Morphological Studies of Effect of Light on Plants”

✓ located verbatim in the source · title, characters 0–68 · show in text ↑
e2

“Nitrates are present in great amounts in all tomato plants except the control and gantry crane house specimens. They are low in amount in buckwheat in 17, 19, and 24-hour exposures. They are usually lowest in the gantry crane house with extra carbon dioxide”

✓ located verbatim in the source · abstract, characters 374–631 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Maximum development of the plant occurs in 12-hour light exposure in tomato.

Treatment
12-houre3
Outcome
development of the plante3
Direction
maximume3
Qualifier
considering height and differentiated tissuee3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e3

“The maximum development of the plant (considering height and differentiated tissue) occurs in the 12-hour tomato and the 17-hour buckwheat”

✓ located verbatim in the source · abstract, characters 636–774 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Maximum development of the plant occurs in 17-hour light exposure in buckwheat.

Taxon
buckwheate3
Treatment
17-houre3
Outcome
development of the plante3
Direction
maximume3
Qualifier
considering height and differentiated tissuee3

Verbatim

e3

“The maximum development of the plant (considering height and differentiated tissue) occurs in the 12-hour tomato and the 17-hour buckwheat”

✓ located verbatim in the source · abstract, characters 636–774 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Injury is evident in tomato exposed to 17 hours or more of light.

Treatment
17 hours or moree4
Outcome
Injurye4

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e4

“Injury is evident in the tomato in exposures of 17 hours or more, resulting in marked decrease in photosynthetic ability”

✓ located verbatim in the source · abstract, characters 779–899 · show in text ↑
Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Exposure of tomato to 17 hours or more of light results in a marked decrease in photosynthetic ability.

Treatment
17 hours or moree4
Outcome
photosynthetic abilitye4
Direction
marked decreasee4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e4

“Injury is evident in the tomato in exposures of 17 hours or more, resulting in marked decrease in photosynthetic ability”

✓ located verbatim in the source · abstract, characters 779–899 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Continuous light tends to produce thinner leaves in plants.

Taxon
PlantsViridiplantaet0
Treatment
Continuous lighte5
Outcome
leavese5
Direction
thinnere5

Verbatim

t0

“Microchemical and Morphological Studies of Effect of Light on Plants”

✓ located verbatim in the source · title, characters 0–68 · show in text ↑
e5

“Continuous light tends to produce thinner leaves, with palisade layer shorter or lacking”

✓ located verbatim in the source · abstract, characters 904–992 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Continuous light tends to give a palisade layer that is shorter or lacking in plants.

Taxon
PlantsViridiplantaet0
Treatment
Continuous lighte5
Outcome
palisade layere5
Direction
shorter or lackinge5

Verbatim

t0

“Microchemical and Morphological Studies of Effect of Light on Plants”

✓ located verbatim in the source · title, characters 0–68 · show in text ↑
e5

“Continuous light tends to produce thinner leaves, with palisade layer shorter or lacking”

✓ located verbatim in the source · abstract, characters 904–992 · show in text ↑
Associationobservedoriginal resultmixedmeasured

Claim · model-written summary

The effect of gantry crane house conditions on leaf thickness is variable.

Taxon
PlantsViridiplantaet0
Treatment
conditions in the gantry crane housese6
Outcome
leaf thicknesse6
Setting
gantry crane housese6

Not reportedDirection

Verbatim

t0

“Microchemical and Morphological Studies of Effect of Light on Plants”

✓ located verbatim in the source · title, characters 0–68 · show in text ↑
e6

“The effect of conditions in the gantry crane houses as regards leaf thickness is variable”

✓ located verbatim in the source · abstract, characters 997–1086 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Thinner leaves usually show an increase in stomata number, except in continuous light at the intensity used.

Taxon
PlantsViridiplantaet0
Organ / stage
leavese7
Outcome
number of stomatae7
Direction
increasee7
Qualifier
except in continuous light in intensity usede7

Verbatim

t0

“Microchemical and Morphological Studies of Effect of Light on Plants”

✓ located verbatim in the source · title, characters 0–68 · show in text ↑
e7

“Thinner leaves usually show an increase in the number of stomata, except in continuous light in intensity used”

✓ located verbatim in the source · abstract, characters 1091–1201 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Root development in fibrous root systems is roughly comparable with that of the aerial parts of plants.

Taxon
PlantsViridiplantaet0
Outcome
Root development in fibrous systemse0
Qualifier
roughly comparable with that of the aerial partse0

Verbatim

t0

“Microchemical and Morphological Studies of Effect of Light on Plants”

✓ located verbatim in the source · title, characters 0–68 · show in text ↑
e0

“Root development in fibrous systems appears roughly comparable with that of the aerial parts”

✓ located verbatim in the source · abstract, characters 1206–1298 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

In four o'clock storage roots, maximum development occurs under continuous light in the gantry crane houses.

Taxon
four o'clocke1
Organ / stage
storage rootse1
Treatment
continuous lighte1
Outcome
developmente1
Direction
maximume1
Setting
gantry crane housese1

Verbatim

e1

“In the storage roots of four o'clock, maximum development occurs in the gantry crane houses and continuous light, while maximum height of stem occurs in the 17-hour plant”

✓ located verbatim in the source · abstract, characters 1304–1474 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Maximum stem height of four o'clock occurs in the 17-hour plant.

Taxon
four o'clocke1
Treatment
17-houre1
Outcome
height of steme1
Direction
maximume1

Verbatim

e1

“In the storage roots of four o'clock, maximum development occurs in the gantry crane houses and continuous light, while maximum height of stem occurs in the 17-hour plant”

✓ located verbatim in the source · abstract, characters 1304–1474 · show in text ↑