Abstract
SUMMARY During the period November to March a threefold increase in CO 2 concentration had only a small effect on the growth rate of tomato seedlings, variety Eurocross B. Although net assimilation rates were increased, some inhibitory effects of increased CO 2 concentration on leaf growth were found when the seedlings were very small. The increase in dry weight was equivalent to that made in a few days by plants grown with naturally occurring amounts of CO 2 . There was no increase in the rate of flower initiation. Using supplementary illumination for 17 hr. per day with high‐pressure mercury vapour lamps made it possible to produce in November‐December seedlings similar to those grown during March‐April with natural illumination.
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Claims 6
Claim · model-written summary
Threefold CO2 increase had a small effect on tomato seedling growth rate.
- Taxon
- tomato
Solanum lycopersicume0 - Material
- Eurocross Be0
- Treatment
- a threefold increase in CO 2 concentratione0
- Outcome
- growth ratee0
- Direction
- small effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a threefold increase in CO 2 concentration had only a small effect on the growth rate of tomato seedlings, variety Eurocross B.”
Claim · model-written summary
Higher CO2 increased net assimilation rate.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- increased CO 2 concentratione0
- Outcome
- net assimilation ratese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although net assimilation rates were increased, some inhibitory effects of increased CO 2 concentration on leaf growth were found when the seedlings were very small.”
t0“tomato seedlings”
Claim · model-written summary
Higher CO2 inhibited leaf growth in very small tomato seedlings.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- increased CO 2 concentratione0
- Outcome
- leaf growthe0
- Direction
- inhibitorye0
- Qualifier
- when the seedlings were very smalle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although net assimilation rates were increased, some inhibitory effects of increased CO 2 concentration on leaf growth were found when the seedlings were very small.”
t0“tomato seedlings”
Claim · model-written summary
CO2-associated dry-weight increase matched a few days of growth under natural CO2.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- CO 2e0
- Outcome
- dry weighte0
- Direction
- increasee0
- Comparator
- naturally occurring amounts of CO 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in dry weight was equivalent to that made in a few days by plants grown with naturally occurring amounts of CO 2 .”
t0“tomato seedlings”
Claim · model-written summary
The rate of flower initiation did not increase.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- increased CO2 concentrationt1
- Outcome
- rate of flower initiatione0
- Direction
- no increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no increase in the rate of flower initiation.”
t0“tomato seedlings”
t1“increased CO2 concentration”
Claim · model-written summary
Supplementary illumination produced November–December seedlings similar to naturally lit March–April seedlings.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- supplementary illumination for 17 hr. per day with high‐pressure mercury vapour lampse0
- Outcome
- seedlings similar to those grown during March‐Aprile0
- Comparator
- natural illuminatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using supplementary illumination for 17 hr. per day with high‐pressure mercury vapour lamps made it possible to produce in November‐December seedlings similar to those grown during March‐April with natural illumination.”
t0“tomato seedlings”
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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.