Paper · 1974 · Journal of the American Society for Horticultural Science

Increased Tomato Fruit Development by CO2 Enrichment1,2

G. N. Knecht; J. W. O'Leary

4
claims
9
verbatim quotes
11
citations
3
research areas
✓
Open access · cc-by-nc-nd

Abstract

Abstract Tomato plants, Lycopersicon esculentum Mill. cv. Floradel, were grown in environments of 400, 800, or 1200 ppm CO 2 . Otherwise, identical environmental parameters were maintained. Two successive harvests were made: 1) 50 days from seeding, 2) 64 days from seeding. No significant differences occurred in vegetative growth of plants grown under the 3 CO 2 levels. While there was no ultimate difference in either the number or development of flowers, plants growing in 800 and 1200 ppm CO 2 environments had both a significantly greater fruit number and greater fruit weight than plants growing in the lower CO 2 level of 400 ppm.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 4

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Tomato plants at 800 and 1200 ppm CO2 had a significantly greater fruit number than plants at 400 ppm CO2.

Material
Floradele1
Organ / stage
fruite2
Treatment
800 and 1200 ppm CO 2e2
Outcome
fruit numbere2
Direction
greatere2
Comparator
400 ppme2

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

e1

“Tomato plants, Lycopersicon esculentum Mill. cv. Floradel, were grown in environments of 400, 800, or 1200 ppm CO 2”

✓ located verbatim in the source · abstract, characters 9–124 · show in text ↑
e2

“plants growing in 800 and 1200 ppm CO 2 environments had both a significantly greater fruit number and greater fruit weight than plants growing in the lower CO 2 level of 400 ppm”

✓ located verbatim in the source · abstract, characters 460–638 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Tomato plants at 800 and 1200 ppm CO2 had greater fruit weight than plants at 400 ppm CO2.

Material
Floradele1
Organ / stage
fruite2
Treatment
800 and 1200 ppm CO 2e2
Outcome
fruit weighte2
Direction
greatere2
Comparator
400 ppme2

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

e1

“Tomato plants, Lycopersicon esculentum Mill. cv. Floradel, were grown in environments of 400, 800, or 1200 ppm CO 2”

✓ located verbatim in the source · abstract, characters 9–124 · show in text ↑
e2

“plants growing in 800 and 1200 ppm CO 2 environments had both a significantly greater fruit number and greater fruit weight than plants growing in the lower CO 2 level of 400 ppm”

✓ located verbatim in the source · abstract, characters 460–638 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

No significant differences in tomato vegetative growth occurred among the three CO2 levels.

Treatment
400, 800, or 1200 ppm CO 2e1
Outcome
vegetative growthe3
Direction
no_changeinferrede3
Comparator
3 CO 2 levelse3

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

e1

“Tomato plants, Lycopersicon esculentum Mill. cv. Floradel, were grown in environments of 400, 800, or 1200 ppm CO 2”

✓ located verbatim in the source · abstract, characters 9–124 · show in text ↑
e3

“No significant differences occurred in vegetative growth of plants grown under the 3 CO 2 levels”

✓ located verbatim in the source · abstract, characters 275–371 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

There was no ultimate difference in the number or development of tomato flowers among the CO2 levels.

Organ / stage
flowerse4
Treatment
400, 800, or 1200 ppm CO 2e1
Outcome
number or development of flowerse4
Direction
no_changeinferrede4
Comparator
3 CO 2 levelse3

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

e1

“Tomato plants, Lycopersicon esculentum Mill. cv. Floradel, were grown in environments of 400, 800, or 1200 ppm CO 2”

✓ located verbatim in the source · abstract, characters 9–124 · show in text ↑
e3

“No significant differences occurred in vegetative growth of plants grown under the 3 CO 2 levels”

✓ located verbatim in the source · abstract, characters 275–371 · show in text ↑
e4

“While there was no ultimate difference in either the number or development of flowers”

✓ located verbatim in the source · abstract, characters 373–458 · show in text ↑

co2 · yield · Solanum lycopersicum (tomato)Results differ

39 papers: 32 positive, 7 negative or no effect

31 papers in the same direction as this paper · 7 in the opposite direction

  1. no effect
  2. no effect
  3. no effect

35 papers more in this group

See all 39 papers →

co2 · growth · Solanum lycopersicum (tomato)Positive and negative results

75 papers: 59 positive, 16 negative or no effect

15 papers in the same direction as this paper · 59 reporting no difference from an alternative

  1. positive
  2. positive
  3. positive

71 papers more in this group

See all 75 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.