Abstract
Carbon dioxide-enrichment of young tomato plants grown in controlled-environment cabinets at low light intensity (14 cal cm−2 day−1, visible radiation) increased their net assimilation rates and, initially, relative growth-rates. Subsequently, the relative growth-rate fell to near the rate of non-enriched plants, owing to a fall in leaf-area ratio associated with an increase in leaf dry weight/area. Sowing non-enriched plants a few days earlier to reach the same total dry weight would not have produced identical plants. The effects of CO2-enrichment to 1000 vpm could be simulated by increasing light intensity by approximately one third except that the plants had shorter internodes than those in extra CO2. This was a morphogenetic effect of light since CO2-enrichment itself produced slightly shorter plants than controls for an equivalent total dry weight. CO2-enrichment did not change the dry-weight distribution in the plants and had little effect on rate of leaf produoction or the number of flower primordia. There were no indications that beneficial effects of CO2-enrichment operated other than through increased photosynthesis.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 8
Claim · model-written summary
CO2 enrichment increased net assimilation rate and, initially, relative growth-rate of young tomato plants at low light.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Carbon dioxide-enrichmente0
- Outcome
- net assimilation rates and, initially, relative growth-ratese0
- Direction
- increasede0
- Qualifier
- at low light intensitye0
- Comparator
- non-enriched plantse1
- Setting
- controlled-environment cabinetse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide-enrichment of young tomato plants grown in controlled-environment cabinets at low light intensity (14 cal cm−2 day−1, visible radiation) increased their net assimilation rates and, initially, relative growth-rates”
e1“Subsequently, the relative growth-rate fell to near the rate of non-enriched plants, owing to a fall in leaf-area ratio associated with an increase in leaf dry weight/area”
Claim · model-written summary
Relative growth-rate of CO2-enriched tomato plants fell to near the rate of non-enriched plants after the initial increase.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Carbon dioxide-enrichmente0
- Outcome
- relative growth-ratee1
- Direction
- felle1
- Qualifier
- to near the rate ofe1
- Comparator
- non-enriched plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide-enrichment of young tomato plants grown in controlled-environment cabinets at low light intensity (14 cal cm−2 day−1, visible radiation) increased their net assimilation rates and, initially, relative growth-rates”
e1“Subsequently, the relative growth-rate fell to near the rate of non-enriched plants, owing to a fall in leaf-area ratio associated with an increase in leaf dry weight/area”
Claim · model-written summary
The later fall in relative growth-rate of tomato plants was owing to a fall in leaf-area ratio associated with higher leaf dry weight per area.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- relative growth-ratee1
- Qualifier
- owing to a fall in leaf-area ratio associated with an increase in leaf dry weight/areae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide-enrichment of young tomato plants grown in controlled-environment cabinets at low light intensity (14 cal cm−2 day−1, visible radiation) increased their net assimilation rates and, initially, relative growth-rates”
e1“Subsequently, the relative growth-rate fell to near the rate of non-enriched plants, owing to a fall in leaf-area ratio associated with an increase in leaf dry weight/area”
Claim · model-written summary
Increasing light intensity by about one third simulated the CO2-enrichment effect on tomato, except that internodes were shorter.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- increasing light intensity by approximately one thirde2
- Outcome
- internodese2
- Direction
- shortere2
- Comparator
- extra CO2e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide-enrichment of young tomato plants grown in controlled-environment cabinets at low light intensity (14 cal cm−2 day−1, visible radiation) increased their net assimilation rates and, initially, relative growth-rates”
e2“The effects of CO2-enrichment to 1000 vpm could be simulated by increasing light intensity by approximately one third except that the plants had shorter internodes than those in extra CO2”
Claim · model-written summary
CO2 enrichment itself produced slightly shorter tomato plants than controls for an equivalent total dry weight.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- CO2-enrichment itselfe3
- Outcome
- slightly shorter plantse3
- Direction
- shortere3
- Qualifier
- for an equivalent total dry weighte3
- Comparator
- controlse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide-enrichment of young tomato plants grown in controlled-environment cabinets at low light intensity (14 cal cm−2 day−1, visible radiation) increased their net assimilation rates and, initially, relative growth-rates”
e3“This was a morphogenetic effect of light since CO2-enrichment itself produced slightly shorter plants than controls for an equivalent total dry weight”
Claim · model-written summary
CO2 enrichment did not change the dry-weight distribution of tomato plants.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- CO2-enrichmente4
- Outcome
- dry-weight distributione4
- Direction
- did not changee4
- Comparator
- non-enriched plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide-enrichment of young tomato plants grown in controlled-environment cabinets at low light intensity (14 cal cm−2 day−1, visible radiation) increased their net assimilation rates and, initially, relative growth-rates”
e1“Subsequently, the relative growth-rate fell to near the rate of non-enriched plants, owing to a fall in leaf-area ratio associated with an increase in leaf dry weight/area”
e4“CO2-enrichment did not change the dry-weight distribution in the plants and had little effect on rate of leaf produoction or the number of flower primordia”
Claim · model-written summary
CO2 enrichment had little effect on the rate of leaf production or the number of flower primordia of tomato plants.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- CO2-enrichmente4
- Outcome
- rate of leaf produoction or the number of flower primordiae4
- Direction
- little effecte4
- Comparator
- non-enriched plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide-enrichment of young tomato plants grown in controlled-environment cabinets at low light intensity (14 cal cm−2 day−1, visible radiation) increased their net assimilation rates and, initially, relative growth-rates”
e1“Subsequently, the relative growth-rate fell to near the rate of non-enriched plants, owing to a fall in leaf-area ratio associated with an increase in leaf dry weight/area”
e4“CO2-enrichment did not change the dry-weight distribution in the plants and had little effect on rate of leaf produoction or the number of flower primordia”
Claim · model-written summary
The beneficial effects of CO2 enrichment on tomato operated through increased photosynthesis and not by other means.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- beneficial effects of CO2-enrichmente5
- Qualifier
- other than through increased photosynthesise5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide-enrichment of young tomato plants grown in controlled-environment cabinets at low light intensity (14 cal cm−2 day−1, visible radiation) increased their net assimilation rates and, initially, relative growth-rates”
e5“There were no indications that beneficial effects of CO2-enrichment operated other than through increased photosynthesis”
The same questions in other papers
co2 · growth · Solanum lycopersicum (tomato)Positive and negative results
58 papers in the same direction as this paper · 15 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- 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.